08.a Martin Marietta 2026 AOP Packet
1 | P a g e
Date of Meeting: March 17, 2026
To: Honorable Mayor and Members of the City Council
From: Greenlee Dahle, Consultant City Planner
T.J. Hofer, Consultant City Planner
Re: Annual Operators Permit (AOP) for Martin Marietta Mine at 22303
Manning Trail
Applicant:
Christina Morrison
Tiller Corporation, a Martin
Marietta Materials, Inc.
Company
Zoning:
Rural Residential - General
(RR-G), Aggregate Mining
Overlay (AM-O), Shoreland
Management Overlay (SM-O)
Owner:
Christina Morrison
Tiller Corporation, a Martin
Marietta Materials, Inc.
Company
Future
Land Use Mining
Location: PID 0703220410001 and nine
others
Review
Deadline: March 31, 2026
The applicant is requesting approval for an Annual Operating Permit for an existing sand and
gravel mining operation.
BACKGROUND
Tiller Corporation, a Martin Marietta Materials, Inc. company (Marietta or applicant), has
applied for its 2026 Annual Operating Permit (AOP) for their existing sand and gravel mining
operation located on Manning Avenue near 225th Street in Scandia. The site has been actively
mined since 1966, and currently operates under Conditional Use Permits (CUP) granted by the
City on May 20, 2008, with Resolution 05-20-08-02 and 05-20-08-03. The Tiller mine site
previously operated under a CUP issued by Washington County when the County exercised land
use authority within New Scandia Township. Permitted activities included the mining and
processing of aggregate, the production of hot-mix asphalt, and the recycling of concrete and
asphalt products.
2 | P a g e
The City’s Mining Ordinance specifies an AOP cycle that coincides with the active mining
season. Applications are due by January 31 each year, to enable permits to be approved before
the start of the mining season later in that year.
The applications for the Scandia Mine Site since 2010 have included both the Tiller site and the
adjacent former Dresel Mine to the southeast. Tiller purchased the Dresel site in 2009. Martin
Marietta acquired Tiller, and subsequentially both sites, in April of 2021 and manages and
maintains the site as a whole. The City issued a CUP for mining and processing at the Dresel site
on May 20, 2008. As the owner of both sites, Marietta is to comply with the conditions of both
the Tiller and Dresel CUPs. Issues and compliance with each are discussed in this report.
Additionally, the City received concerns from an adjacent property owner in 2025. Previous
communications and a staff analysis of the issue are attached to this report.
EVALUATION OF REQUEST
The Applicant is requesting an Annual Operating Permit (AOP) for a mining and processing
operation. The permit requirements are governed by Ordinance No. 103, Regulation of Mining
and Related Activities, Chapter 4 of the Development Code. The Ordinance requires review of
the following items for the AOP:
1. The operating conditions of the previous year and conditions required by the CUPs for
the Tiller and Dresel sites.
2. Proposed operating conditions and any variation from the previous year.
3. Results of the annual inspection by the City.
Conditional Use Permit
Tiller Mine Site
The City of Scandia approved a Conditional Use Permit for sand and gravel mining and
processing at the Scandia Mine site for Tiller Corporation on May 20, 2008. Martin Marietta
now owns and operates the site. The conditions included the items noted in the table that follows.
Mariettas’s performance is indicated in the table on the following pages. There were no issues
identified in 2024 for the Tiller Mine site.
Condition
Deadline
Specified in
CUP
Notes
1. Comply with CUP Ongoing In process--monitored by City staff and
consultants
2. Comply with Rules and
Regulations Ongoing In process--monitored by City staff and
consultants.
3 | P a g e
Condition
Deadline
Specified in
CUP
Notes
4. Permits from CMSCWD None specified
CMSCWD Permit 08-003 for the Tiller
mine remains in effect. The Watershed
District Permit, 08-003, was revised in
2019 to align the permit with the City’s
annual review process and eliminate a 5-
year term on the permit. The revisions to
the permit were approved by District
Managers during their February 13, 2019,
Regular Meeting.
5. Monitoring Wells July 20, 2008
Three required monitoring wells were
installed in 2008. One well was taken out
of service and sealed in 2011 to
accommodate reclamation activities (MW-
2). Monitoring results for the two active
wells in 2025 were provided with the AOP
application and reviewed by Spheros
Environmental (formerly LRE Water), the
City’s groundwater consultant.
6. Ground Water
Monitoring July 20, 2008
The Ground Water Monitoring Plan was
approved in the fall of 2008 and revised in
2013. The plan is on file with the City.
In May 2022, Martin Marietta received
authorization from MN DNR to increase its
annual water appropriation from 20 MGY
to 30 MGY for aggregate production and
dust control. With the increased water
appropriation, a short-term monitoring plan
was developed and implemented to help
evaluate aquifer recovery to pre-pumping
water levels following pumping during
periods of high use. Groundwater
monitoring was conducted in 2025. Water
level data is summarized on Table 1 in the
application and reviewed below by Spheros
Environmental.
7. Excavation below water
table
May not begin
August 20,
2008
Excavation into the water table began in
2009. The CUP permits mining into
groundwater table to a depth of 50 feet.
4 | P a g e
Condition
Deadline
Specified in
CUP
Notes
Excavation into the groundwater table has
occurred as follows:
2013 — to a depth of 15 to 20 feet
2014 — no mining into groundwater table
2015 — no mining into groundwater table
2016 — to a depth of 15 to 20 feet
2017 — no mining into groundwater table
2018 — no mining into groundwater table
2019 — to a depth of 15 feet
2020 — to a depth of 17 feet
2021 — no mining into groundwater table
2022 — no mining into groundwater table
2023 — to a depth of 15 to 20 feet
2024 — no mining into groundwater table
2025 — no mining into groundwater table
2026 – mining into groundwater table
Excavation into the groundwater table did
not occur in 2025. It is expected to occur
within the 2026 Potential Mining Area as
depicted on Figure 2, Site Plan.
Water level data is collected on an ongoing
basis and submitted to the City. Water level
data was submitted with the AOP
application. The review from Spheros
Environmental, water quality consultant for
the City of Scandia, is discussed in this
report in the Groundwater Monitoring
section.
8. Production Well Records July 20, 2008
Production well records are being kept by
Marietta and are available to the City.
Water pumped at the site in 2025 was
945,749 gallons.
The DNR Water Appropriation Permit for
the site allows up to 30 million gallons to
5 | P a g e
Condition
Deadline
Specified in
CUP
Notes
be used each year. 28 MGY are approved
for washing and 2 MGY are approved for
dust control.
9. Ground Water Analysis -
DRO (Diesel Range
Organics) and GRO
None specified
Groundwater samples were analyzed for
DRO. No gasoline is stored on site. If
gasoline storage is added, GRO will be
analyzed.
Groundwater monitoring was conducted in
2025. Water quality data is summarized on
Table 2, included in the application.
Monitoring results were included with the
application and reviewed by Spheros
Environmental. No DRO were detected in
the samples in 2025.
10. Map of Index Well Sites July 20, 2008 Map was provided to the City on August
28, 2008.
11. Asphalt Plant Setback
from Lake Ongoing Setback has been maintained, as required
by the CUP.
12. Lake Depth Ongoing
Application indicates that the depth of
excavation will not exceed fifty (50) feet
below the water table, as per the CUP.
Excavation depth to date has been less than
50 feet into the groundwater table through
2025.
13. Truck Signage and
Roadway Cleaning July 20, 2008
Washington County has posted signs on
Lofton and Manning Avenues per their
County requirements. Marietta has posted
signs on 218th Street and Lofton Avenue to
restrict trucks from using 228th Street per
City of Scandia requirements. During
construction season, a “No Engine
Breaking" sign is now being placed on
Manning Trail North near the entrance to
the site to address concerns of engine
breaking on the road. Signage was in place
during the City site visit in 2025.
6 | P a g e
Condition
Deadline
Specified in
CUP
Notes
14. Lofton/ Highway 97
Intersection July 20, 2008
Marietta restricts importing add-rock from
Lofton Avenue during non-daylight hours
per the CUP requirements.
15. 228th Street Signage July 20, 2008
Signage is posted at the Lofton Avenue
North exit that restricts trucks from using
228th Street.
16-19. Updated
Reclamation Plan July 20, 2008 Included in application materials; discussed
below.
20. Letter of Credit/Security Due before
AOP approval The financial guarantees are current.
21. AOP Application
Submittal
January 31,
annually
Application was submitted on January 30,
2025, and determined to be complete on
February 3, 2026.
Dresel Mine
The City of Scandia approved a Conditional Use Permit for sand and gravel mining and
processing for Dresel Contracting, Inc. on May 20, 2008. Martin Marietta now owns and
operates this site, and therefore must also comply with the conditions of the Dresel CUP. There
were no issues identified in 2025 on the Dresel Mine site.
Condition
Deadline
Specified in
CUP
Notes
1. Comply with CUP Ongoing In process--monitored by City staff and
consultants
3. Comply with Rules and
Regulations Ongoing In process--monitored by City staff and
consultants
4. Permits from CMSCWD None specified
CMSCWD Permit 08-003 for the Tiller
mine remains in effect. The Watershed
District Permit, P08-003, was revised in
2019 to align the permit with the City’s
annual review process and eliminate a 5-
year term on the permit. The revisions to
7 | P a g e
Condition
Deadline
Specified in
CUP
Notes
the permit were approved by District
Managers during their February 13, 2019,
Regular Meeting.
5. Monitoring Wells July 20, 2008
Installed in May 2008. The Groundwater
Plan was updated to reflect changes to
monitoring well MW-2 in 2013. The site
complied with the plan in 2025.
6. Revise Proposed
Conditions Plan Pit
Elevations Monitoring
July 20, 2008
The City previously approved a maximum
mining depth of 922 feet AMSL at the
Dresel site, ensuring three feet of
separation between the floor of the mine
and the water table surface during high
water table conditions, based on
monitoring results. Spheros Environmental,
water quality consultant for the City of
Scandia, reviewed the submitted data and
made recommendations which are included
in this report under the Groundwater
Monitoring section.
7. Ground Water
Monitoring Plan July 20, 2008 Approved in October 2008 and on file at
the City.
8. Revise Site Plan include
Index Wells July 20, 2008 Provided to City on August 28, 2008.
9. Identify Bench Mark
Elevation July 20, 2008 Established at top of Well Casing MW-1.
10. Ground Water Analysis
- DRO and GRO None specified
Samples are analyzed for DRO when
mining activity is occurring. No gasoline is
stored on site. If gasoline storage is added,
GRO will be analyzed. No DRO or other
contaminants were detected in 2025
monitoring at the Dresel site.
11. Signage on 218th and
Roadway Cleaning Ongoing
Signage was installed and meets the CUP
requirements; signage was in place during
the 2025 site visit.
8 | P a g e
Condition
Deadline
Specified in
CUP
Notes
12. Truck Cleaning Ongoing Trucks must meet requirements for
cleaning, per CUP. No issues were
identified during the 2025 site visit.
13. Delineate Northern
Wetland
None specified Wetland report and delineation completed.
Buffer marked by September 15, 2008.
Complaint received regarding
encroachment into a wetland in late 2014.
Mitigation and replacement plan were
completed and approved by TEP panel and
wetland credits were successfully
withdrawn from the BWSR Wetland Bank
in 2016.
14-17. Updated Reclamation
Plan July 20, 2008
The Reclamation Plan was previously
revised as part of a combined Reclamation
Plan submitted for the Tiller Site.
18. Letter of Credit/Security Before AOP
approval Financial guarantees are current.
21. AOP Application
Submittal
January 31,
annually
Application was submitted on January 30,
2025, and determined to be complete on
February 3, 2026.
Proposed Operating Conditions, Deviations from Previous Year, and Ordinance
Requirements – Combined Tiller and Dressel Site
Site Operations - Background Information
The Tiller mine site includes several parcels, as indicated on the Site Plan. Excavation activities
in 2010-2011 removed material between the Tiller site and the former Dresel Mine site, merging
the two sites into one. The mining operation includes removal of overburden; excavation of sand
and gravel; crushing, washing, screening, stockpiling of sand and gravel; recycling of concrete
and asphalt products; the production of hot-mix asphalt; and reclamation activities. The
overburden is removed from areas to be mined and stockpiled on the site for use in reclamation
activities. The operator brings portable crushing, washing, and screening plants to the site
periodically and these are used to process and stockpile materials. The operator produces and
sells asphalt throughout the construction season and delivers add-rock materials to sites as
needed to produce the required mixes and materials.
9 | P a g e
Mining into the groundwater table began at the site in 2009. This activity has been described in
the previous mining plans for this site and was evaluated in the Environmental Assessment
Worksheets completed for the Tiller site in 1987 and 1999. The CUP allows mining into the
groundwater to a maximum depth of 50 feet. Mining into the groundwater table occurred in
2013, 2016, 2019, 2020, and 2023 to a depth of 15-20 feet. Mining into the groundwater table
did not occur in 2014, 2015, 2017, 2018, 2021, 2022, 2024, or 2025. Mining into the
groundwater table is expected to occur in 2026.
The asphalt plant at the site is equipped with a bag-house air pollutant collection device and
operates under a Minnesota Pollution Control Agency (MPCA) Air Emissions Permit. Storage
tanks at the site (for fuel and asphalt cement) are regulated by the MPCA.
The main access routes to and from the site are Manning Avenue (County Road 15) and Lofton
Avenue (County Road 1). Both Manning and Lofton are paved. The haul road from Manning
Avenue is paved through the site to the hot-mix asphalt plant and loading area.
Annual Activity
The application submission included the data required by the ordinance regarding annual activity
on the site, as follows:
2023 2024 2025
Amount of material removed
from the site (in tons) 229,000 287,700 370,742
Amount of add-rock brought
onto site (in tons) 44,000 91,660 36,090
Recycled asphalt and concrete
brought to the site (in tons) 22,000 24,000 44,000
Average number of trips to and
from the site each day (in
trips/day)
140 182 195
The application anticipates that mining and processing will continue at the site in 2026. The level
of activity will depend on market demand for the site’s products. The Site Plan identifies the
Potential Mining Areas for 2026, which are within the approved mining limits. Potential areas
for reclamation are also identified on the Site Plan. These are discussed later in this report.
Ground Water Monitoring
The approved Groundwater Monitoring Plan for the site is on file with the City. The City’s
groundwater consultant, Spheros Environmental (formerly LRE Water), reviews the groundwater
monitoring results each year for the AOP and provides comments to the City. Spheros
Environmental did not note any concerns with the 2026 application as it relates to groundwater
10 | P a g e
quality and quantity. Below are the 2025 Groundwater Monitoring Data Review Comments from
Spheros Environmental:
• All groundwater levels, water quality, and pumping volumes reported are in compliance.
• From November 2024 through April 2025 groundwater levels remained stable. From
April 2025 through November 2025 levels increased by an average of approximately 0.56
feet and were approximately 3 feet higher than the lowest levels measured in 2010.
• As reported in previous years, groundwater level changes are the result of local and
regional changes in precipitation and are unrelated to mining operations and pumping the
production well.
• The groundwater flow direction across the site is generally to the north and is consistent
with previous data.
• Groundwater samples were collected from the monitoring well and piezometers, and
production well and potable well on September 9, 2025. As required by the monitoring
plan, select samples were analyzed for total suspended solids, ammonia nitrogen,
phosphorus, and Diesel Range Organics (DRO). DRO was not detected about the method
detection limit in any of the samples. These and the other analyte results indicate no
groundwater quality concerns. The pond was not sampled due to ice cover.
• The 2025 groundwater monitoring was completed in accordance with the approved
monitoring plan.
Figure 1 is included in the attachments of this report.
In 2022, the applicant received an increase from the MNDNR to allow the groundwater
appropriations to be increased from 20 million galls per year (MGY) to 30 MGY.
Spheros Environmental noted the production well pumped approximately 945,749 gallons in
2025, which is well below the permitted amount of 30 MGY.
Recommendations provided by Spheros Environmental include the following:
• Continue groundwater level monitoring and sampling in accordance with the
approved Monitoring Plan, ensuring all data collection, analysis, and reporting
requirements are met.
• Continue to delineate and map the proposed excavation area(s) where mining
activities are expected to intersect the water table, updating figures and supporting
documentation as necessary.
Operating Conditions - Mining Ordinance Requirements, Section 7
1. Setbacks
11 | P a g e
The AOP application indicates that the minimum setbacks are maintained as follows:
• 50 feet from an adjoining property line
• 200 feet from any existing occupied structure not owned by operator or owner
• 100 feet from residential property subdivided into lots of 5 acres or less
• 100 feet from any road right-of-way
The setbacks meet the requirements of Chapter 154 7.1 Setbacks. The City’s 2025
inspection indicated that the setbacks were maintained and still meet City requirements.
2. Fencing
The application indicates that the majority of the site is fenced with 3-strand wire
fencing, except where prohibited due to topography, heavy vegetation, and wetlands.
There are locking metal gates at both entrances. The fencing meets the intent of the City’s
Ordinance. City staff reviewed the fencing during the site visit in 2025 and verified that it
meets the requirements of the Ordinance and CUP.
3. Hours of Operation
The site is operated from 7 am to 7 pm Monday through Friday, except holidays. The
applicant is required to obtain the City’s permission for any extended hours in accordance
with procedures set in Chapter 154, Section 7.3:
“(3) Hours of Operation. Those portions of the mining operation consisting of excavating,
stockpiling, processing, or hauling shall be conducted only between the hours of 7:00
a.m. and 7:00 p.m., Monday through Friday, unless other hours or days of operation are
specifically authorized by the City.”
In 2025, Marietta requested extended hours primarily to keep local CSAH projects on-
schedule including various projects within the City of Lino Lakes and throughout
Washington County. As part of the request for extended hours, the applicant asked to be
notified if the City received any complaints. No complaints regarding the extended hours
of operation have been received in 2025.
Marietta requested, and the City approved, two extended hours requests in 2024. In 2023,
there were four requests granted. Requests for extended hours vary from year to year,
depending on projects and weather.
4. Screening
The mine is screened from surrounding areas by berms, wooded areas, and farm fields.
Several trees have been planted over the years of the mining operation to augment the
screening. Processing and stockpiling operations are conducted in recessed portions of
the site to minimize visibility.
12 | P a g e
5. Dust Control
Major haul roads are hard-surfaced or covered with asphalt millings as dust control
measures. The application indicated that Marietta used a water truck to control dust on
unpaved portions of the site, and calcium chloride was applied to minimize dust
generated by trucking activity. These actions were first implemented in 2019, and have
been continued as needed since then. Marietta plans to continue such practices
throughout 2026.
6. Noise
The application states that all activities are conducted so as to be in accordance with all
Federal, State and City noise standards. No complaints regarding noise have been
received in 2025.
7. Depth of Excavation
The CUP requires that the depth of excavation shall not exceed fifty feet below the water
table (865 feet above mean sea level) on the Scandia Mine site and may not be lower than
922 feet above mean sea level (amsl) on the former Dresel Mine site. In 2025, excavation
into the groundwater table did not occur.
Excavation into the groundwater table is anticipated in 2026. If excavation into the
groundwater table occurs in 2026, it would occur within the 2026 Potential Mining Area
as depicted on their submitted site plan.
8. Site Clearance
Site clearing activities did not occur in 2025. If clearing activity occurs in 2026, it will
occur within the 2026 Potential Mining Areas as depicted on Figure 2, Site Plan.
9. Appearance/Condition
The City’s site inspection in 2025 confirmed that the site and facilities are maintained in
a neat condition.
10. Sanitary Facilities
The application indicates that the site is served by individual sanitary facilities that meet
the requirements of the City’s Ordinance and the Mine Safety and Health Administration.
City staff inspection confirmed that the City’s requirements were met in 2025.
11. Waste Disposal
The application indicates that waste generated by the operation is disposed of in
accordance with Federal, State, and City requirements. The City’s site visit in 2024
confirmed that the Applicant is meeting the requirements of the CUP.
13 | P a g e
12. Water Quality Monitoring Plan
The CUP required that the applicant complete a plan for groundwater monitoring within
60 days of approval of the 2008 CUP (July 20, 2008). The approved groundwater
monitoring plan was completed and is on file at the City. Marietta submitted monitoring
results for 2025 with its application for the 2026 AOP. Spheros Environmental reviewed
the groundwater monitoring activities and found that no DRO (diesel range organics)
were detected in the samples in 2025.
13. Fuel and Chemical Storage
The application describes fuel and chemical storage at the site. The applicant notes that
these materials are stored in accordance with Federal and State standards and County
requirements. On-site fuel storage consists of a 200-gallon above-ground storage tank
which is located within a steel secondary containment area and a 1,000-gallon above-
ground double-walled tank located next to the standby electrical generator. When
processing and/or reclamation crews are present, an additional 1,000-gallon double-
walled tank is brought to the site and used to fuel the respective equipment.
All asphalt cement storage tanks are above-ground. These tanks consist of two 40,000-
gallon tanks and three 32,000-gallon tanks. A 20,000 gallon above-ground used oil
storage tank was removed from the site. All tanks containing asphalt cement are located
within a concrete secondary containment area.
All tanks are registered with MPCA’s Storage Tank Program. MPCA Site ID 51999 is for
the asphalt plant and MPCA Site ID 55016 is for the sand and gravel operation. City staff
reviewed the facilities with Marietta staff at the 2025 site visit.
Small amounts of chemicals utilized by the QM Lab are regulated by Washington County
under the United States Environmental Protection Agency (EPA) rules. EPA ID Number
MND 981 953 417 has been issued for the site which is classified as a Very Small
Quantity Generator.
14. Contingency Response Plan
The application indicates that the site operates under a Spill Prevention, Control and
Countermeasure Plan (SPCC) Plan that was submitted and is on file at the City. The
applicant notes that the mine operator will comply with other such reasonable
requirements that the City may find necessary to adopt for the protection of health, safety
and welfare and/or prevention of nuisance.
15. Processing
The CUP application describes the operation of permanent processing equipment on the
site and indicates that the equipment is operated in accordance with Federal, State, and
City air quality, water quality, and noise standards. The equipment is screened from view
from other properties and adjacent roads. The CUP requires that the asphalt plant and
related structures be set back at least 100 feet from the shore of the proposed lake on the
14 | P a g e
site. The site visit in 2025 verified that the processing facilities meet the setback
requirements of the CUP, and no violations of permits were reported in 2025.
16. Recycling
Recycling at the site is permitted by Chapter 154. Asphalt production used approximately
30,000 tons of recycled asphalt products (RAP) in 2024. 24,000 tons of RAP was brought
into the site in 2024; at year-end there were 71,000 tons of RAP on the site. Processed
RAP is used in asphalt production and recycled concrete is sold in various aggregate
products.
A Solid Waste Storage Facility license that authorizes the storage of unprocessed
concrete, concrete products, and brick and a Recycling Facility license that authorizes the
storage and processing of recycled asphalt products are issued to Marietta by Washington
County. General and Specific Conditions are established for each license and are
reviewed on an annual basis and may include an annual inspection completed by the
County.
A copy of the Annual Report to Washington County is attached to this report.
17. Trucking Operations
The application indicates that the site has access to County Road 15 (Manning Trail N.),
County Road 91 (Lofton Avenue N.), and 218th Street North. These are hard-surfaced
roads. The operator reported that the average number of trucks traveling to and from the
site per day in 2025 was approximately 195 trucks per day.
The proposed conditions for the 2026 AOP are the same as those included in previous
AOPs, which require that Marietta inform all contractors about the following
requirements related to trucking operations, and monitor compliance with the
requirements by all its contractors:
• Engine braking is prohibited in Scandia
• Lofton Avenue is restricted to daytime use only
• Loads are required to be covered
In 2024, a “No Engine Breaking” sign was installed on the northbound lane of Manning
Trail North near the entrance to the site to alert truck drivers entering the site. This sign
will be up during construction season and removed during the off-season.
18. Asphalt Plant
The site operates a permanent hot-mix asphalt plant that was in operation at the time the
City adopted its mining ordinance. The plant operates under an air quality permit issued
by the MPCA and must meet federal, state, and city air, water, and noise standards. The
City received no complaints regarding the operation of the asphalt plant in 2025.
15 | P a g e
Reclamation Plan - Mining Ordinance Requirements, Section 8
Section 8.2 of Chapter 154 requires the “restoration shall proceed concurrently and proportional
to actual mining operations and will be subject to review and approval at each annual inspection
and the end of the permit period." This section is included in the ordinance to ensure that large
areas of the site are not left in a state that would encourage erosion, dust, and weed establishment
instead of being reclaimed. The mining operation is making an ongoing investment in
reclamation, to avoid potential problems that may occur at the end of the mining operation if a
large investment is needed in reclamation, and the applicant’s resources are limited at that point,
or the applicant abandons the site.
Section 8.4 of the City’s Mining ordinance requires the following for reclamation areas:
• All banks must be graded or backfilled
• Graded or backfilled areas shall be surfaced with soil of a quality at least equal to the
topsoil of areas immediately surrounding, to a depth of at least four inches
• The topsoil shall be planted with trees, shrubs, legumes, or grasses
• Slopes shall not be steeper than 4:1
Reclamation activities in 2025 included placement of overburden material along the mining area
north of the Tiller Mine/Dresel Mine common mining border. The slopes were further stabilized
with seeding and mulching. The completed and ongoing reclamation areas are indicated in
Figure 2, Site Plan.
Ongoing reclamation activities are anticipated north and south of the Tiller Mine/Dresel Mine
common mining border and primarily along the east half of the mining area, during 2026. These
areas are shown on Figure 2, Site Plan as 2026 Potential Reclamation Activity. Some of the areas
shown as potential reclamation will also see active mining during 2026. Once mining is
complete, reclamation may advance into these areas during 2026.
ANALYSIS
Review Comments
Carnelian-Marine-St. Croix Watershed District Comments
The CMSCWD provided the following comment:
The District Engineer reviewed the summary of 2025 activities and planned 2026
activities. All is in line with previous reviews, conditions of the CMSCWD permit, and
appears to be in line with Scandia’s CUP and Operating Conditions (confirmation should
be obtained from the City). Mining boundary limits remain unchanged since 2023.
Washington County
Washington County did not provide comment.
16 | P a g e
Department of Natural Resources
The DNR provided the following comment:
The DNR investigation has not started and is scheduled for sometime in 2026. We will let
you know when it’s finished.
City Engineer
The City Engineer did not provide comment.
Public Works Director
The Public Works Director did not provide comment.
Fire Chief
The Fire Chief provided the following comment:
I don’t have any issues, they have been very good to work with.
Site Inspection
City staff completed a site visit to the Martin Marietta Materials, Inc., Scandia Mining Operation
on December 11, 2025, including documenting conditions on the site. During the site visit, staff
reviewed activities and site conditions based on the CUP and 2025 AOP and discussed expected
activity in 2026.
ACTION REQUESTED
The City Council can:
1. Approve the AOP, with or without conditions
2. Deny the application if it is found that the request is not consistent with the
Comprehensive Plan, CUP, AOP Criteria, and Mining Ordinance
3. Table the request if the Council needs additional information to make its decision
STAFF RECOMMENDATION
Staff recommends approval of the Tiller Corporation, a Martin Marietta Materials, Inc. 2026
AOP for sand and gravel mining and related processing at the Scandia Mine, 22303 Manning
Avenue North, with the following conditions:
1. The applicant shall comply with the conditions of the Conditional Use Permit for
sand and gravel mining and processing at the Scandia Mine site approved on May 20,
2008.
2. The applicant shall comply with site operation hours of 7 a.m. to 7 p.m. Monday
through Friday, except holidays, unless the applicant requests and receives the City’s
17 | P a g e
permission for extended hours in accordance with procedures set forth in Chapter
154.
3. The applicant shall continue to observe groundwater levels during the year. If levels
continue to rise, there is the potential for the water table surface to be above the depth
of the excavation and outside of the limits of the proposed lake. If this occurs, maps
submitted for the 2027 AOP shall identify the general areas where excavation depth is
below the water table.
4. The applicant shall continue to map the area(s) of excavation into the water table and
provide said map as part of the AOP application.
5. The applicant shall provide the approximate depth of the excavation below the water
table in future annual reports to confirm the excavation did not go below the 865.87
feet amsl threshold.
6. The applicant shall continue to provide the production well records for the site to the
City so the pumping records can be compared to past and future groundwater level
trends at the site. The applicant should measure the water level in the production well
under non-pumping conditions during monitoring periods.
7. Requests for operating hours or haul routes outside those specified in the Conditional
Use Permit shall be accompanied by a proposed truck haul route for approval by staff.
8. The applicant shall inform its contractors about the following requirements related to
trucking operations, and monitor compliance with the requirements by all its
contractors:
a. Engine braking is prohibited in Scandia
b. Lofton Avenue is restricted to daytime use only
c. Haul loads are required to be covered
9. The applicant shall regularly monitor the entrances and exits to the site, and work
with their hauling contractors and truck drivers to maintain compliance with traffic
laws.
10. The reclamation activities shall meet the requirements of the Conditional Use Permit,
including soil and planting requirements.
11. If the applicant has knowledge that a crash or traffic violation occurs involving a
truck hauling for Marietta, Marietta shall contact the City to report the incident
immediately. The applicant shall report actions it will take to respond to the incident.
12. The applicant shall pay all fees and escrows associated with this application.
13. This Annual Operating Permit shall expire on March 31, 2027.
18 | P a g e
Staff recommends the following motion:
Motion to recommend approval of the attached resolutions to approve an Annual
Operating Permit the Martin Marietta Mine, with findings and conditions as described by
staff within the staff report.
Attachments
A. Resolution 03-17-26-02 Approving the AOP for Martin Marietta Mine
B. Location Map
C. Application for 2026 AOP
D. Applicant’s Narrative
E. Comments from David Hume of Spheros Environmental (formerly LRE Water)
F. 2025 Annual Report to Washington County
G. 2025 Staff Analysis of Received Complaints
H. Questions submitted by Jon Lindel, 11240 218th St N, dated February 27, 2025, and
March 7, 2025
I. Response submitted by Christina Morrison, Martin Marietta dated March 13, 2025
CITY OF SCANDIA
RESOLUTION NO. 03-17-2026-02
RESOLUTION APPROVING THE 2026 ANNUAL OPERATING PERMIT
FOR THE SAND AND GRAVEL MINE AND PROCESSING FACILITY AT
THE SCANDIA MINE SITE
WHEREAS, Tiller Corporation, a Martin Marietta Materials, Inc. Company, operates a sand
and gravel mining and processing operation and asphalt hot-mix plant located on
approximately 435 acres at Manning Avenue North, on property legally described as:
See Attachment A; and
WHEREAS, the site has been actively mined since 1966, and has operated under a previous
Conditional Use Permit granted by Washington County, when the County exercised land use
authority within New Scandia Township. Permitted activities include the mining and processing
of aggregate, the production of hot-mix asphalt, and the recycling of concrete and asphalt
products; and
WHEREAS, an Environmental Assessment Worksheet (EAW) was prepared for this mining
facility in 1987, a second EAW was completed in 1999 for a proposed expansion of the facility;
and
WHEREAS, the scope of operations and mining limits proposed in the current permit
application to the City are consistent with the scope of the operations and mining limits reviewed
in the 1999 EAW; and
WHEREAS, Chapter 154 of the City Code (hereinafter referred to as “the ordinance”), otherwise
known as Ordinance No. 103, Chapter 4 of the Development Code of the City of Scandia,
Minnesota, adopted September 20, 2022 replaced the requirements of the ordinances adopted by
the City of Scandia on August 28, 2007, which replaced the ordinances adopted by Washington
County and the former New Scandia Township and required the issuance of a new Conditional
Use Permit and Annual Operating Permits for continued operation of existing mining operations;
and
WHEREAS, the City approved a Conditional Use Permit for the mining and processing
operations on May 20, 2008; and
WHEREAS, Tiller Corporation, Inc. submitted an application for an Annual Operating Permit
to the City of Scandia, which was found to be complete for review; and
WHEREAS, the Scandia City Council reviewed the application at its regular meeting on March
17, 2026.
NOW, THEREFORE, BE IT HEREBY RESOLVED BY THE CITY COUNCIL
OF THE CITY OF SCANDIA, WASHINGTON COUNTY, MINNESOTA, that the
Annual Operating Permit for Tiller Corporation for a sand and gravel mine and processing
facility at the Scandia mine site is approved, subject to the following conditions:
1. The applicant shall comply with the conditions of the Conditional Use Permit for
sand and gravel mining and processing at the Scandia Mine site approved on May 20,
2008.
2. The applicant shall comply with site operation hours of 7 a.m. to 7 p.m. Monday
through Friday, except holidays, unless the applicant requests and receives the City’s
permission for extended hours in accordance with procedures set forth in Chapter
154.
3. The applicant shall continue to observe groundwater levels during the year. If levels
continue to rise, there is the potential for the water table surface to be above the depth
of the excavation and outside of the limits of the proposed lake. If this occurs, maps
submitted for the 2026 AOP shall identify the general areas where excavation depth is
below the water table.
4. The applicant shall continue to map the area(s) of excavation into the water table and
provide said map as part of the AOP application.
5. The applicant shall provide the approximate depth of the excavation below the water
table in future annual reports to confirm the excavation did not go below the 865.87
feet amsl threshold.
6. The applicant shall continue to provide the production well records for the site to the
City so the pumping records can be compared to past and future groundwater level
trends at the site. The applicant should measure the water level in the production well
under non-pumping conditions during monitoring periods.
7. Requests for operating hours or haul routes outside those specified in the Conditional
Use Permit shall be accompanied by a proposed truck haul route for approval by staff.
8. The applicant shall inform its contractors about the following requirements related to
trucking operations, and monitor compliance with the requirements by all its
contractors:
• Engine braking is prohibited in Scandia
• Lofton Avenue is restricted to daytime use only
• Haul loads are required to be covered
9. The applicant shall regularly monitor the entrances and exits to the site, and work
with their hauling contractors and truck drivers to maintain compliance with traffic
laws.
10. The reclamation activities shall meet the requirements of the Conditional Use Permit,
including soil and planting requirements.
11. If the applicant has knowledge that a crash or traffic violation occurs involving a
truck hauling for Tiller, Tiller shall contact the City to report the incident
immediately. The applicant shall report actions it will take to respond to the incident.
12. The applicant shall pay all fees and escrows associated with this application.
13. This Annual Operating Permit shall expire on March 31, 2026.
FURTHER, BE IT RESOLVED, that any significant variation from these plans and
conditions of approval shall require an application to amend this Annual Operating Permit.
Whereupon, said Resolution is hereby declared adopted on this 17th day of March 2026.
Steve Kronmiller, Mayor
ATTEST:
Kyle Morell, City Administrator
Attachment A
Section 1.
The Southeast 1/4 of Section 7, in Township 32 North, of Range 20 West; and that part of the
Southwest 1/4 of the Southwest 1/4 of Section 8, in Township 32 North, of Range 20 West,
described as follows:
Commencing at a point in the North line of said Southwest 1/4 of the Southwest 1/4 of said
Section 8, 22 rods East of the Northwest corner thereof, thence West along said North line to
the Northwest corner of said Southwest 1/4 of the Southwest 1/4, thence South along the West
line of said Southwest 1/4 of the Southwest 1/4 to the Southwest corner thereof, thence East
along the South line of said Southwest 1/4 of the Southwest 1/4 a distance of 42 rods to a point,
thence Northwesterly in a straight line to the point of beginning; and also a strip of land 2 rods
wide on the North side of said Southwest 1/4 of the Southwest 1/4, commencing 22 rods East of
the Northwest corner thereof and extending to the Northeast corner thereof.
That part of the South Half of the Northeast Quarter of Section 7, Township 32 North, Range 20
West, Washington County, Minnesota, described as follows:
Commencing at the Northwest corner of said South Half; thence Easterly along the North line
of said South Half a distance of 1223.40 feet to the point of beginning; thence Southerly,
parallel with the West line of said South Half, a distance of 1319.60 feet to the South line of
said South Half; thence Easterly along said South line a distance of 1423.65 feet to the
Southeast corner of said South Half; thence Northerly along the East line of said South Half a
distance of 1317.76 feet to the Northeast corner of said South Half; thence Westerly along the
North line of said South Half a distance of 1422.96 feet to the point of beginning. Subject to
228th Street North along North line.
Section 2.
That part of the Southeast Quarter of the Southwest Quarter and of the South Half of the
Northeast Quarter of the Southwest Quarter of Section 7, Township 32, Range 20, Washington
County, Minnesota lying easterly of the centerline of County Road 15A as said centerline is
described in Book 312 of Deeds on pages 19 and 20.
Subject to County Road 15A.
Subject to easements of record.
Section 3.
The North One-Half of the Southwest Quarter (N 1/2 of SW 1/4) and the Southeast Quarter of
the Northwest Quarter (SE 1/4 of NW 1/4) all in Section 8, Township 32, Range 20.
Except: All that part of the Northeast Quarter of the Southwest Quarter (NE 1/4 of SW 1/4) of
Section 8, Township 32, Range 20, Washington County, Minnesota lying East of the centerline
of County State Aid Highway No. 1 (Lofton Avenue).
Section 4.
That part of the Southeast Quarter of the Southwest Quarter (SE 1/4 of SW 1/4) of Section 8,
Township 32, Range 20 lying West of the public highway as the same now runs over and across
said tract, except the North 2 rods thereof; and that part of the Southwest Quarter of the
Southwest Quarter (SW 1/4 of SW 1/4) of Section 8, Township 32, Range 20 described as
follows, to wit:
Beginning 22 rods East of the Northwest corner of said Southwest Quarter of Southwest
Quarter (SW 1/4 of SW 1/4); thence Southeasterly in a straight line to a point 42 rods East of
the Southwest corner of said Southwest Quarter of Southwest Quarter (SW 1/4 of SW
1/4); thence East to the Southeast corner of said Southwest Quarter of Southwest Quarter (SW
1/4 of SW 1/4 ), thence North to the Northeast corner of said Southwest Quarter of Southwest
Quarter (SW 1/4 of SW 1/4), thence West to the point of beginning, except the North 2 rods
thereof said tract.
Except: That part of the North 320.00 feet of the South 620.00 of the Southeast Quarter of the
Southwest Quarter of Section 8, Township 32, Range 20, Washington County, Minnesota, lying
Westerly of the center line of County State Aid Highway No. 1, as the same is now laid out and
traveled, said center line is described as follows:
Beginning at a point on the South line thereof distant 37.30 feet Westerly of the Southeast
comer thereof (for the purposes of this description, the South line of said Southeast Quarter of
the Southwest Quarter is assumed to bear South 89 degrees 38 minutes 18 seconds West);
thence Northerly along a curve concave to the West, having a radius of 2864.81 feet and a
central angle of 7 degrees 12 minutes 48 seconds, a distance of 360.67 feet, the chord of said
curve bears North 14 degrees 39 minutes 10 seconds West; thence North 18 degrees 15 minutes
34 seconds West, tangent to said curve, a distance of 282.59 feet; thence Northerly along a
tangential curve, concave to the East, having a radius of 1980.97 feet and a central angle of 20
degrees 29 minutes 54 seconds, a distance of 708.72 feet to the North line of said Southeast
Quarter of the Southwest Quarter, and there terminating.
And lying Easterly of the following described line:
Commencing at the Southwest corner of said Section 8; thence Easterly along the South line of
said Section 8, a distance of 1714.61 feet to the point of beginning of the line to be described;
thence Northeasterly, deflecting to the left 83 degrees 54 minutes 52 seconds, a distance of
623.51 feet to the North line of the South 620.00 feet of said Southeast Quarter of the
Southwest Quarter, and there terminating.
Also except: That part of the Southeast Quarter of the Southwest Quarter of Section 8,
Township 32 N, Range 20 W, described as follows: Commencing at the Southwest corner of
said Section 8, thence Easterly along the South line of Section 8 a distance of 1714.61 feet
which is the point of beginning of this description; thence Northeasterly deflecting to the left 83
degrees 54 minutes 52 seconds a distance of 301.70 feet to the North line of the South 100 feet
of the Southeast Quarter of the Southwest Quarter of Section 8; thence Easterly along said
North line a distance of 757 feet, more or less, to the center line of County State Aid Highway
No. 1; thence Southeasterly along said center line a distance of 305 feet, more or less, to the
South line of Section 8, thence Westerly along said South line a distance of 862 feet, more or
less, to the point of beginning, according to the United States Government Survey thereof and
situate in Washington County, Minnesota,
GVWX15
GVWX4
GVWX3 ?@A@95
?@A@97
ST91
ST52ST50
Ma
p
D
o
c
u
m
e
n
t
:
\
\
a
r
c
s
e
r
v
e
r
1
\
G
I
S
\
S
C
A
N
D
V
A
L
_
T
W
_
M
N
\
E
S
R
I
\
P
r
o
\
S
c
a
n
d
i
a
_
M
N
_
A
e
r
i
a
l
\
S
c
a
n
d
i
a
_
M
N
_
A
e
r
i
a
l
.
a
p
r
x
|
U
s
e
r
n
a
m
e
:
j
e
n
i
b
r
|
D
a
t
e
S
a
v
e
d
:
1
/
1
2
/
2
0
2
3
2
:
2
9
P
M
Source: Washington County, MNDot
0 3,700
Feet
City Limits
Parcels
!ILegend
Aerial Map
City of Scandia, Minnesota January 2023
File No._____________
APPLICATION FOR PLANNING AND ZONING REQUEST
City of Scandia, Minnesota
14727 209th Street North, Scandia, MN 55073
Phone 651/433-2274 Fax 651/433-5112 Web http://www.ci.scandia.mn.us
Please read before completing: The City will not begin processing an application that is incomplete. Detailed submission
requirements may be found in the Scandia Development Code, available at the City office and website (www.ci.scandia.mn.us) and in
the checklist forms for the particular type of application. Application fees are due at the time of application and are not refundable.
1. Property Location: (street address, if applicable)
2. Washington County Parcel ID:
3. Complete Legal Description: (attach if necessary)
4. Owner(s):Phone:
(h)
(b)
Street Address: E-Mail:
City/ State: Zip:
5.Applicant/Contact Person:Phone:
(h)
(b)
Street Address (Mailing): E-Mail:
City/ State: Zip:
6.Requested Action(s): (check all that apply)
____ Variance
____ Variance Extension
____ Conditional Use Permit (CUP)
____ CUP Extension
____ CUP/ Open Space Subdivision.
____ CUP/ Planned Unit Development
____ Interim Use Permit (IUP)
____ Annual Operators Permit
____ Administrative Permit
(type)____________________
____ Site Plan Review
(type)____________________
____ Site Plan Modification
____ Site Plan Extension
____ Sign (Permanent)
____ Amendment (Development Code )
____ Amendment (Comp. Plan )
____ Subdivision, Minor
____ Subdivision, Preliminary Plat/Major
____ Subdivision, Final Plat
____ Environmental Review
____ Wetland Review
2026-02
7. Brief Description of Request: (attach separate sheet if necessary; include Variance Rationale if
necessary)
_____________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
8. Project Name:
I hereby apply for consideration of the above described request and declare that the information and materials
submitted with this application are complete and accurate. I understand that no application shall be considered
complete unless accompanied by fees as required by city ordinance. Applications for projects requiring more than one
type of review shall include the cumulative total of all application fees specified for each type of review. I understand
that applicants are required to reimburse the city for all out-of-pocket costs incurred for processing, reviewing and
hearing the application. These costs shall include, but are not limited to: parcel searches; publication and mailing of
notices; review by the city’s engineering, planning and other consultants; legal costs, and recording fees. An escrow
deposit to cover these costs will be collected by the city at the time of application. The minimum escrow deposit shall
be cumulative total of all minimum escrow deposits for each type of review required for the project, unless reduced as
provided for by ordinance. The city may increase the amount of the required escrow deposit at any time if the city’s
costs are reasonably expected to exceed the minimum amount. Any balance remaining after review is complete will
be refunded to the applicant. No interest is paid on escrow deposits.
PLEASE NOTE: If the fee owner is not the applicant, the applicant must provide written authorization by the fee
owner in order for this application to be considered complete.
Property Fee Owner Signature(s) Date:
Applicant Signature(s) Date:
For City Use Only
Application Fees: _______________________
Escrow Deposit: _______________________
City of Scandia, Minnesota
See 2026 Application for the Annual Operators Permit dated January 2026.
Martin Marietta Sand and Gravel Mining Operation
1/30/2026
$5,000.00
$500.00 PAID $5,500 1/30/2026
ATTACHMENT 1
LEGAL DESCRIPTION
Legal Description for New Scandia Mining Site
Section 1.
The Southeast V4 of Section 7, in Township 32 North, of Range 20 West; and
that part of the Southwest V4 of the Southwest V4 of Section 8, in Township 32
North, of Range 20 West, described as follows:
Commencing at a point in the North line of said Southwest V4 of the Southwest
V4 of said Section 8, 22 rods East of the Northwest corner thereof, thence West
along said North line to the Northwest corner of said Southwest V4 of the
Southwest V4, thence South along the West line of said Southwest V4 of
Southwest V4 to the Southwest corner thereof, thence East along the South line
of said Southwest V4 of the Southwest V4 a distance of 42 rods to a point, thence
Northwesterly in a straight line to the point of beginning; and also a strip of land
2 rods wide on the North side of said Southwest V4 of the Southwest V4,
commencing 22 rods East of the Northwest corner thereof and extending to the
Northeast corner thereof.
That part of the South Half of the Northeast Quarter of Section 7, Township 32
North, Range 20 West, Washington County, Minnesota, described as follows:
Commencing at the Northwest corner of said South Half; thence Easterly along
the North line of said South Half a distance of 1223.40 feet to the point of
beginning; thence Southerly, parallel with the West line of said South Half, a
distance of 1319.60 feet to the South line of said South Half; thence Easterly
along said South line a distance of 1423.65 feet to the Southeast corner of said
South Half; thence Northerly along the East line of said South Half a distance of
1317.76 feet to the Northeast corner of said South Half; thence Westerly along
the North line of said South Half a distance of 1422.96 feet to the point of
beginning. Subject to 228th Street North along North line.
Section 2.
That part of the Southeast Quarter of the Southwest Quarter and of the South
Half of the Northeast Quarter of the Southwest Quarter of Section 7, Township
32, Range 20, Washington County, Minnesota lying easterly of the centerline of
County Road 15A as said centerline is described in Book 312 of Deeds on pages
19 and 20.
Subject to County Road 15A.
Subject to easements of record.
Section 3.
The North One-Half of the Southwest Quarter (N V2 of SW %) and the Southeast
Quarter of the Northwest Quarter (SE % of NW %) all in Section 8, Township 32,
Range 20.
Except: All that part of the Northeast Quarter of the Southwest Quarter (NE %
of SW %) of Section 8, Township 32, Range 20, Washington County, Minnesota
lying East of the centerline of County State Aid Highway No. 1 (Lofton Avenue).
Section 4.
That part of the Southeast Quarter of the Southwest Quarter (SE % of SW %) of
Section 8, Township 32, Range 20 lying West of the public highway as the same
now runs over and across said tract, except the North 2 rods thereof; and that
part of the Southwest Quarter of the Southwest Quarter (SW % of SW %) of
Section 8, Township 32, Range 20 described as follows, to wit:
Beginning 22 rods East of the Northwest corner of said Southwest Quarter of
Southwest Quarter (SW% of SW %); thence Southeasterly in a straight line to a
point 42 rods East of the Southwest corner of said Southwest Quarter of
Southwest Quarter (SW% of SW %); thence East to the Southeast corner of
said Southwest Quarter of Southwest Quarter (SW % of SW % ), thence North to
the Northeast corner of said Southwest Quarter of Southwest Quarter (SW % of
SW %), thence West to the point of beginning, except the North 2 rods thereo(
said tract.
Except: That part of the North 320.00 feet of the South 620.00 of the Southeast
Quarter of the Southwest Quarter of Section 8, Township 32, Range 20,
Washington County, Minnesota, lying Westerly of the center line of County State
Aid Highway No. 1, as the same is now laid out and traveled, said center line is
described as follows:
Beginning at a point on the South line thereof distant 37.30 feet Westerly of the
Southeast corner thereof (for the purposes of this description, the South line of
said Southeast Quarter of the Southwest Quarter is assumed to bear South 89
degrees 38 minutes 18 seconds West); thence Northerly along a curve concave
to the West, having a radius of 2864.81 feet and a central angle of 7 degrees 12
minutes 48 seconds, a distance of 360.67 feet, the chord of said curve bears
North 14 degrees 39 minutes 10 seconds West; thence North 18 degrees 15
minutes 34 seconds West, tangent to said curve, a distance of 282.59 feet;
thence Northerly along a tangential curve, concave to the East, having a radius
of 1980.97 feet and a central angle of 20 degrees 29 minutes 54 seconds, a
distance of 708.72 feet to the North line of said Southeast Quarter of the
Southwest Quarter, and there terminating.
And lying Easterly of the following described line:
Commencing at the Southwest corner of said Section 8; thence Easterly along
the South line of said Section 8, a distance of 1714.61 feet to the point of
beginning of the line to be described; thence Northeasterly, deflecting to the left
83 degrees 54 minutes 52 seconds, a distance of 623.51 feet to the North line of
the South 620.00 feet of said Southeast Quarter of the Southwest Quarter, and
there terminating.
Also except: That part of the Southeast Quarter of the Southwest Quarter of
Section 8, Township 32 N, Range 20 W, described as follows: Commencing at
the Southwest corner of said Section 8, thence Easterly along the South line of
Section 8 a distance of 1714.61 feet which is the point of beginning of this
description; thence Northeasterly deflecting to the left 83 degrees 54 minutes 52
seconds a distance of 301.70 feet to the North line of the South 100 feet of the
Southeast Quarter of the Southwest Quarter of Section 8; thence Easterly along
said North line a distance of 757 feet, more or less, to the center line of County
State Aid Highway No. 1; thence Southeasterly along said center line a distance
of 305 feet, more or less, to the South line of Section 8, thence Westerly along
said South line a distance of 862 feet, more or less, to the point of beginning,
according to the United States Government Survey thereof and situate in
Washington County, Minnesota.
Sunde Engineering, PLLC.
10830 Nesbitt Avenue South • Bloomington, Minnesota 55437-3100
Phone: (952) 881-3344 • Fax: (952) 881-1913 • E-Mail: info@sundecivil.com
January 2026
APPLICATION FOR
2026 ANNUAL OPERATORS PERMIT
Scandia, MN
Consulting Civil Engineers
Martin Marietta Page 1
2026 Annual Operators Permit Application
January 2026
APPLICATION FOR ANNUAL OPERATORS PERMIT
MARTIN MARIETTA
SAND AND GRAVEL MINING OPERATION
CITY OF SCANDIA
WASHINGTON COUNTY, MINNESOTA
January 2026
I. INTRODUCTION
The following Annual Operators Permit (AOP) application is submitted on behalf of Tiller Corporation,
a Martin Marietta Materials, Inc. company (herein collectively referred to as “Martin Marietta”) in
compliance with the City of Scandia’s Ordinance No. 103 and Chapter 4 of the Development Code:
Mining and Related Activities Regulations, Section 6, adopted by the City of Scandia on August 28,
2007.
Martin Marietta acquired Tiller in April 2021. Martin Marietta operates a gravel mining and processing
operation including an asphalt plant within the City of Scandia. The site has been actively mined since
at least 1966. Prior to the incorporation of Scandia in 2006, New Scandia Township and Washington
County were the permitting authorities. The City of Scandia adopted two resolutions on May 20, 2008
issuing Conditional Use Permits (CUPs) for the site which is now comprised of the Tiller Mine and
Dresel Mine.
II. ANNUAL REPORT
A. Operating Conditions
The site operates in accordance with operating conditions regulated by Section 7 of Scandia
Ordinance 103.
1. Setbacks: No mining, stockpiling or land disturbance activities, with the exception of screening
and reclamation activities, are proposed to take place within the setback areas. Minimum
setback areas are maintained as follows:
a) 50 feet from an adjoining property line
b) 200 feet from an occupied structure existing on May 20, 2008.
c) 100 feet from any contiguous property subdivided into residential lots of 5 acres or less
d) 100 feet from any road right-of-way.
2. Fencing: The majority of the site is fenced with 3 strand wire fencing except where prohibited
due to topography, heavy vegetation and wetlands. There are locking metal gates at all entrances
to the site.
3. Hours of operation: The site is operated from 7:00 a.m. to 7:00 p.m. Monday through Friday
except holidays. Extended hours may be required periodically for situations such as emergencies,
Martin Marietta Page 2
2026 Annual Operators Permit Application
January 2026
accelerated work schedules or weather delays. In accordance with procedures set forth in
Ordinance No. 103, extended hours were requested and approved in 2025.
The frequency of extended hours requests varies from year-to-year depending on the projects.
In 2025, Martin Marietta requested extended hours primarily to keep local CSAH projects on-
schedule including various projects within the City of Lino Lakes and throughout Washington
County. As part of the request for extended hours, Martin Marietta asked to be notified if the
City received any complaints regarding the extended hours of operations. Martin Marietta did
not receive any notice of complaints from the City or any members of the public as a result of
the extended hours.
4. Screening: Screening berms, wooded buffer areas and agricultural fields separate the mining
activity from surrounding properties. A large number of trees have been planted in the past to
screen site activities. Processing and stockpiling operations are conducted in recessed portions
of the site to minimize visibility.
5. Dust control: Major haul roads are hard surfaced and some roads are covered with asphalt
millings as dust control measures. A water truck is used to water unpaved portions of the site to
control dust. During periods of increased trucking activity, calcium chloride or other approved
dust suppressant is applied to provide additional dust control. These practices will continue
throughout 2026.
6. Noise: All activities are conducted so as to be in accordance with all Federal, State and City noise
standards.
7. Depth of excavation: Depth of excavation will not be lower than 922 feet above mean sea level
(msl) for the property described in Resolution No. 05-20-08-02, approving the Conditional Use
Permit Application of Dresel Contracting for Sand and Gravel Mining Processing. On the balance
of the property, the depth of excavation below the water table will not be lower than 865.87
feet msl.
8. Site clearance: Site clearing activities did not occur in 2025. If clearing activity occurs in 2026, it
will occur within the 2025 Potential Mining Areas as depicted on Figure 2, Site Plan.
9. Appearance/condition: All buildings, plants and equipment at the site are maintained in a neat
condition. Weeds and other unsightly or noxious vegetation are controlled as necessary to
preserve the appearance of the reclaimed areas.
10. Sanitary Facilities: The scale and asphalt plant area is served by an individual sewage treatment
system. Portable sanitary facilities are provided in the operating areas as required by the Mine
Safety and Health Administration.
11. Waste Disposal: Waste generated from the operation is disposed of in accordance with Federal,
State and City requirements.
Martin Marietta Page 3
2026 Annual Operators Permit Application
January 2026
12. Water Quality Monitoring: A plan for groundwater monitoring was developed and approved in
conjunction with the CUP permitting process. Groundwater monitoring was conducted in 2025.
Water level data is summarized on Table 1 and water quality data is summarized on Table 2,
included in the back of this application.
13. Fuel and Chemical Storage: All fuel and chemicals stored on site are stored in accordance with
Federal and State standards. On-site fuel storage consists of a 200-gallon above-ground storage
tank located within a steel secondary containment area and a 1,000-gallon above-ground double
walled tank located next to the standby electrical generator. When processing and/or
reclamation crews are present, an additional 1,000-gallon double walled tank is brought to the
site and used to fuel the respective equipment.
All asphalt cement storage tanks are above-ground. These tanks consist of two 40,000 gallon
tanks and three 32,000 gallon tanks. All asphalt cement tanks are located within a concrete
secondary containment area.
All tanks are registered with MPCA’s Storage Tank Program. MPCA Site ID 51999 is for the asphalt
plant and MPCA Site ID 55016 is for the sand and gravel operation.
Small amounts of chemicals utilized by the QM Lab are regulated by Washington County under
United States Environmental Protection Agency (EPA) rules. EPA ID Number MND 981 953 417
has been issued for the site which is classified as a Very Small Quantity Generator.
14. Contingency Response Plan: The site operates under a SPCC Plan which is available upon request.
15. Added Provisions: The operator will comply with other reasonable requirements that the City
may find necessary to adopt for the protection of health, safety and welfare and/or prevention
of nuisance.
16. Processing: The site operates permanent processing equipment as defined by Ordinance No. 103
in accordance with all Federal, State and City air and water quality and noise standards.
Processing equipment is screened from view from other properties and adjacent roads. Portable
crushing equipment is placed on the floor of the facility and setbacks per Ordinance No. 103 are
maintained between the processing equipment and the property lines.
17. Recycling: Recycling activity at the facility meets all applicable standards contained in Section 7.1
(1) of Ordinance No, 103.
A Solid Waste Storage Facility license that authorizes the storage of unprocessed concrete,
concrete products and brick and a Recycling Facility license that authorizes the storage and
processing of recycled asphalt products are reissued annually to Martin Marietta by Washington
County. General and Specific Conditions are established for each license and are reviewed on an
annual basis and may include an annual inspection completed by the County.
A copy of the Annual Report to Washington County is available upon request.
Martin Marietta Page 4
2026 Annual Operators Permit Application
January 2026
18. Trucking Operations: The site has access to County Road 15 (Manning Trail N.), County Road 91
(Lofton Avenue N.) and 218th Street North. These are hard-surfaced roads.
19. Asphalt Plants: The site operates a permanent asphalt plant and the plant was in operation at
the time the City adopted its mining ordinance. Therefore, the plant may expand in the future
subject to the setbacks set forth in Section 7.1(1) of Ordinance No. 103. The plant operates in
accordance with all Federal, State, and City air, water, and noise quality standards.
B. Compliance with Conditions of the CUP
1. Updated Copy of Application Material: A completed bound book that includes all of the
information and plans submitted to the City during the CUP process was previously submitted and
is on file at the City.
2. Watershed District Permit: The Watershed District Permit, P08-003, was revised in 2019 to align
the permit with the City’s annual review process and eliminate a 5-year term on the permit. The
revisions to the permit were approved by District Managers during their February 13, 2019
Regular Meeting.
3. Monitoring Wells: All required monitoring wells have been installed.
4. Groundwater Monitoring Plan: A monitoring plan with protocols is on file with the City.
5. Excavation Below Water Table: In 2025, excavation into the groundwater table did not occur. In
2026, excavation into the groundwater table is expected to occur within the 2026 Potential
Mining Area as depicted on Figure 2, Site Plan. Water level data is collected on an on-going basis
and submitted annually to the City (see Table 1).
6. Production Well Records: Records of the production well are kept. They are summarized on Table
3.
7. Groundwater Analysis: Groundwater samples are collected and analyzed for DRO in accordance
with the groundwater monitoring plan. The monitoring results have been supplied to the city and
are summarized on Table 2. Currently, no gasoline is stored on site. If gasoline is stored on-site in
the future, GRO will be added to the analyte list.
8. MN County Well Index: A figure which illustrates the site and MN County Index wells is on file at
the City.
9. Setback from Proposed Lake: The asphalt plant and related structures will be setback at least 100
feet from the edge of the water body that will be created as part of mining operations.
10. Lake Depth: The maximum excavation into the water table will be no more than 50 feet. The
minimum excavation elevation of 865 feet msl has been established in previous AOP’s.
Martin Marietta Page 5
2026 Annual Operators Permit Application
January 2026
11. Truck Hauling Signs: Washington County has posted Lofton and Manning Avenues per the
County’s requirements. Martin Marietta has posted signs on 218th Street per the City of Scandia
requirements.
12. Lofton/Hwy 97 Intersection: Martin Marietta restricts importing add-rock from Lofton Ave. N.
during non-daylight hours as defined in their CUP.
13. 228th Street Sign: Martin Marietta has posted a sign at the Lofton Ave. N. exit that restricts trucks
from using 228th Street.
14. Reclamation and Sequencing Plan: A Reclamation Plan and Phasing Plan is on-file with the City.
Current reclamation progress is indicated on Figure 2, Site Plan, submitted with this AOP
application.
C. Annual Activity
20. Amount of material removed from the site: Approximately 370,742 tons of material was
removed in 2025.
21. Amount of add-rock brought onto the site: Approximately 36,090 tons of Class A, Class B, Class
C and Class D add-rock were imported to the site in 2025.
22. Area reclaimed and type of reclamation: Completed and ongoing reclamation areas are indicated
on Figure 2, Site Plan.
23. Ongoing reclamation activities are anticipated north and south of the Tiller Mine/Dresel Mine
common mining border and primarily along the east half of the mining area, during 2026. These
areas are shown on Figure 2, Site Plan as 2026 Potential Reclamation Activity. Some of the areas
shown as potential reclamation will also see active mining during 2026. Once mining is complete,
reclamation may advance into these areas during 2026.
24. Average number of trips hauling material to and from the site per day for the season: The average
number of trucks travelling to and from the site per day in 2025 was approximately 195 trucks
per day.
25. On July 19, 2022 the Scandia City Council adopted Resolution No. 2022-27 amending the Future
Land Use Map to remove the Mining Overlay designation from PID 17.032.20.21.0005. The
approximately 10-acre vacant lot is adjacent to the Dresel Mine on 218th Street. Since the lot
previously shared a common mining and reclamation border with the Dresel Mine, Martin
Marietta reserves the ability to perform reclamation and future screening berm removal that
might be needed to accommodate future development within the setback area on the Dresel
Mine property.
D. Description of operating conditions planned for the coming year:
Martin Marietta Page 6
2026 Annual Operators Permit Application
January 2026
During the 2026 mining season, the site will continue to operate as it has in the past. The mining
operation includes the removal of overburden, excavation of sand and gravel, crushing, washing,
screening, stockpiling, and recycling of concrete and asphalt products. Portable crushing, washing,
and screening plants are brought to the site periodically and material is excavated, processed, and
stockpiled. Asphalt is produced and sold throughout the construction season and add rock
materials are delivered to the site as needed.
The 2026 production schedule anticipates mining and processing in 2026. The exact area of
excavation will depend on the required gradation of the end products. Mining anticipated during
2026 will occur within the 2026 Potential Mining Area as indicated on Figure 2, Site Plan.
Aerial Photo: Figure 1, Aerial Photo, is attached which includes a October 9, 2025 aerial photo and
identifies the mining limit, the Tiller Mine property boundary and the Dresel Mine property
boundary.
Site Plan: Figure 2, Site Plan, is attached which illustrates the 2026 potential active mining area,
reclamation area, stockpile and processing area, reclaimed area and the current limits of
excavation into groundwater.
Reclamation: Ongoing reclamation activities are anticipated north and south of the Scandia
Mine/Dresel Mine common mining border and primarily along the east half of the mining area
during 2026. These areas are shown on Figure 2, Site Plan as 2026 Potential Reclamation Activity.
Operating Conditions for 2026: The 2026 production schedule anticipates mining and processing
during 2026. Mining will occur within the 2026 Potential Mining Area as indicated on Figure 2, Site
Plan. The exact area of excavation will depend on the required gradation of the end products.
E. Inspection:
The City conducts an annual inspection of the site. The last inspection occurred on December 11,
2025.
III. CERTIFICATION
I hereby certify that this plan, specification, or
report was prepared by me or under my direct
supervision and that I am a duly Licensed
Professional Engineer under the laws of the state
of Minnesota.
__________________________________
Kirsten Pauly
Date: January 30, 2026 Reg. No. 21842
Tables
Table 1: Scandia Groundwater Elevation Data
Groundwater elevation levels are recorded in feet above mean sea level
NM=Not Measured (due to obstruction)
MW-2 Taken out of service 6/21/2011
PZ-4 Taken out of service 5/12/2020
914.99 = Apparent incorrect reading at time of field visit
Date
Scandia
Production
Well Scandia PZ-3 Scandia PZ-4 Scandia PZ-5 Scandia PZ-6 Scandia MW-1 Scandia MW-2
Scandia On-
Site Pond
11/11/2025 916.26 916.34 917.62 915.04 918.97 918.52
10/9/2025 916.36 916.43 917.71 915.18 919.09 918.62
8/20/2025 916.4 916.49 917.44 915.12 919 918.82
7/25/2025 916.36 916.41 918.24 914.98 918.83
6/30/2025 915.97 916.48 917.53 914.83 918.55 918.73
5/30/2025 915.76 915.77 916.93 914.66 918.44 919.03
10/16/2024 915.84 915.91 916.83 914.32 918.35 918.21
9/10/2024 916.06 916.13 917.04 914.74 918.59 918.51
8/30/2024 916.16 916.25 917.18 914.91 918.84 918.53
7/25/2024 915.97 916.08 916.75 914.36 918.53 918.23
6/25/2024 915.68 915.78 916.52 914.18 918.38 918.10
5/23/2024 915.33 915.59 916.24 914.01 918.06 917.90
4/22/2024 915.10 915.13 916.28 913.89 917.82 917.47
10/17/2023 916.81 916.66 917.94 915.16 918.83 918.48
9/14/2023 915.97 916.75 918.14 914.78 918.76 918.47
8/23/2023 915.83 916.11 916.82 914.78 918.72 918.42
8/6/2023 915.73 915.83 917.06 914.49 918.54 918.39
6/21/2023 915.93 916.02 916.74 914.62 918.01 918.63
5/5/2023 916.25 916.52 917.83 915.04 916.94 918.69
4/18/2023 916.26 916.31 917.17 914.85 916.98 918.77
4/11/2023 916.15 916.2 917.03 914.75 916.72
10/21/2022 916.45 916.57 917.94 915.16 917.21 919.23
9/14/2022 916.57 916.77 918.27 915.32 917.36
8/23/2022 916.60 916.90 918.49 915.42 918.25 919.41
7/18/2022 916.59 916.82 918.23 915.28 919.72 919.39
6/1/2022 917.11 917.17 918.35 915.81 920.00 919.62
5/13/2022 917.30 917.34 918.30 915.95 921.16 920.12
10/20/2021 917.89 917.95 919.48 916.57 920.81 919.30
9/8/2021 918.16 918.26 919.82 916.85 921.10
8/30/2021 918.27 918.31 919.79 916.93 921.16 920.78
7/27/2021 918.24 918.35 919.94 916.96 921.25 919.68
6/24/2021 NM 919.09 920.29 917.21 921.67 920.30
5/21/2021 NM 918.47 920.27 917.11 921.73 920.38
4/15/2021 918.88 918.95 920.47 917.61 921.86 920.34
10/23/2020 919.41 919.53 921.31 918.12 922.21 921.80
9/17/2020 919.63 919.75 921.58 918.29 922.64 922.12
8/27/2020 919.74 919.80 921.52 918.41 922.64 922.21
7/31/2020 919.26 918.85 920.74 917.91 922.08
6/22/2020 919.29 919.12 920.91 917.75 922.15 921.69
5/22/2020 919.08 919.17 920.02 916.01 921.47
4/23/2020 918.26 918.31 919.85 919.28 916.30 921.35
3/31/2020 918.94 918.97 920.39 920.38 917.64 921.74
10/31/2019 918.41 918.47 919.82 919.94 917.11 921.19
9/9/2019 918.10 918.13 919.75 919.63 916.79 920.99
8/30/2019 917.86 917.89 919.68 919.64 916.55 920.89
7/11/2019 917.73 917.48 919.15 919.20 916.20 920.26
5/10/2019 917.35 917.42 918.95 918.46 916.02 920.33 919.70
4/30/2019 917.23 917.31 919.04 918.4 915.93 922.47
10/24/2018 916.84 916.99 918.57 918.7 916.18 919.88
9/24/2018 917.12 917.17 918.82 918.44 915.83 920.08
8/30/2018 NM 916.95 918.52 918.41 915.62 919.89
7/26/2018 917.06 917.02 918.67 918.44 915.63 920.04
6/6/2018 NM 916.83 918.60 918.36 915.56 919.97 918.11
5/1/2018 917.13 917.2 918.36 918.46 915.88 920.08 918.23
4/25/2018 917.12 917.16 918.7 918.52 915.88 920.13
11/30/2017 917.53 917.61 919.06 919.12 916.29 921.44 919.17
10/31/2017 NM 917.52 919.26 919.21 916.20 920.57 918.91
Page 1 of 3
Date
Scandia
Production
Well Scandia PZ-3 Scandia PZ-4 Scandia PZ-5 Scandia PZ-6 Scandia MW-1 Scandia MW-2
Scandia On-
Site Pond
9/28/2017 917.63 917.71 NM 919.23 916.44 920.53
8/24/2017 917.69 917.75 919.18 NM 916.41 920.53
7/20/2017 917.35 917.48 919.06 919.04 916.32 920.4
6/15/2017 917.35 917.48 918.76 918.67 916.11 920.2
5/16/2017 917.00 917.05 918.5 918.31 915.73 919.83
4/27/2017 916.89 916.95 918.34 NM 915.67 919.71
10/3/2016 916.35 916.39 917.86 917.56 915.13 919.17 917.24
9/27/2016 916.33 916.30 917.86 917.40 914.94 919.18
8/16/2016 915.97 916.00 917.50 917.28 914.75 918.79
7/6/2016 915.68 915.71 917.12 916.57 914.44 917.35
5/20/2016 914.40 914.09 915.63 915.17 913.00 916.66
10/5/2015 914.35 914.38 915.90 915.51 913.15 917.19 915.43
9/29/2015 914.34 914.33 915.88 915.38 913.05 917.18
8/11/2015 914.05 914.08 915.60 915.14 912.80 916.88
7/16/2015 913.77 913.80 915.38 914.90 912.57 916.69
6/18/2015 913.52 913.52 915.00 914.74 912.31 916.36
5/18/2015 913.37 913.40 914.87 914.63 912.16 916.18
4/17/2015 913.39 913.42 914.88 914.75 912.23 916.23
10/9/2014 913.83 913.96 915.44 915.17 912.71 916.77 914.7
9/17/2014 914.00 914.06 915.49 915.12 912.81 916.79
8/19/2014 913.85 913.91 915.36 914.96 912.64 916.66
7/9/2014 913.64 913.69 915.18 914.58 912.41 916.48
6/18/2014 913.41 914.99 914.92 915.72 913.68 916.20
5/12/2014 913.03 913.08 914.56 913.93 912.84 915.85
4/22/2014 912.58 912.60 914.07 913.74 911.38 915.43
11/20/2013 912.88 912.89 914.35 914.20 911.70 915.74
10/25/2013 912.98 913.03 914.50 914.30 911.80 915.83 913.91
9/26/2013 913.00 913.05 914.52 914.29 911.81 915.88
8/27/2013 913.17 913.23 914.66 914.43 911.98 916.03
7/25/2013 913.19 913.29 914.75 914.41 912.06 916.09
6/25/2013 913.17 913.17 914.66 914.18 911.95 915.98
5/23/2013 912.92 912.94 914.45 913.92 911.62 915.79 913.99
4/25/2013 912.90 912.90 914.43 913.88 911.60 915.78
12/5/2012 912.93 912.99 914.45 914.28 911.70 915.83
10/25/2012 913.14 913.19 914.64 914.50 911.98 916.01 914.17
9/26/2012 913.25 913.29 914.78 914.57 912.03 916.16
9/5/2012 913.44 913.48 914.94 914.83 912.28 916.31
7/26/2012 913.71 913.74 915.22 914.89 912.50 916.52
6/26/2012 913.67 913.67 915.12 914.89 912.50 916.46
5/22/2012 913.37 913.38 914.92 914.61 912.22 916.25
4/23/2012 913.22 913.22 914.69 914.50 912.07 916.07 914.13
3/29/2012 913.26 913.27 914.78 914.53 912.09 916.14
11/10/2011 913.74 913.78 915.19 914.99 912.55 916.55
10/3/2011 913.78 913.83 915.27 915.00 912.60 916.62 914.74
9/8/2011 913.78 913.81 915.29 914.90 912.59 916.61
8/5/2011 913.71 913.72 915.24 914.56 912.44 916.55
7/13/2011 913.30 913.36 914.83 914.34 912.07 916.17
6/21/2011 913.13 913.19 914.65 914.14 911.97 915.99 916.13
6/6/2011 913.06 913.10 914.52 913.97 911.89 915.88 916.02 914.18
5/6/2011 912.70 912.74 914.16 913.69 911.53 915.53 915.68
4/7/2011 912.46 912.48 913.97 913.49 911.22 915.35 915.50
11/23/2010 912.29 912.32 913.84 913.47 911.02 915.18 915.32
10/19/2010 912.46 912.45 913.98 913.62 911.24 915.34 915.46
9/14/2010 912.37 912.38 913.91 913.55 911.11 915.23 915.36
8/9/2010 912.37 912.38 913.92 913.56 911.12 915.22 915.35
7/6/2010 912.47 912.46 NM 913.57 911.19 915.28 915.40
6/7/2010 912.39 912.41 913.94 913.65 911.17 915.30 915.43
4/27/2010 912.51 912.53 914.03 913.77 911.28 915.42 915.54
11/5/2009 913.14 913.15 914.70 914.37 911.89 916.07 916.14
10/21/2009 913.17 913.17 914.72 914.50 911.93 916.08 916.17 914.30
9/10/2009 913.28 913.30 914.85 914.55 912.04 916.22 916.31
8/6/2009 913.28 913.39 914.88 914.70 912.15 916.27 916.35
6/11/2009 913.55 913.58 915.08 914.83 912.36 916.49 916.60
5/18/2009 913.67 913.70 915.19 914.94 912.51 916.61 916.69
4/6/2009 913.79 913.81 915.35 915.04 912.60 916.78 916.86
10/30/2008 914.35 914.37 915.87 915.60 913.13 917.31 917.37
Page 2 of 3
Date
Scandia
Production
Well Scandia PZ-3 Scandia PZ-4 Scandia PZ-5 Scandia PZ-6 Scandia MW-1 Scandia MW-2
Scandia On-
Site Pond
9/16/2008 914.51 914.57 916.06 915.81 913.28 917.48 917.54
8/7/2008 914.60 914.65 916.20 915.80 917.60 917.65
7/9/2008 914.54 914.58 916.13 915.68 917.55 917.61
6/9/2008 914.44 914.50 915.99 915.53 917.44 917.51
5/14/2008 914.29 914.34 915.38 917.29 917.37
5/6/2008 914.26 914.31
3/28/2008 914.07 914.11
2/22/2008 914.16 914.18
1/9/2008 914.30 NM
12/12/2007 914.48 NM
11/8/2007 914.70 914.74
10/11/2007 914.64 914.68
9/11/2007 914.60 914.64
7/19/2007 914.77 914.82
6/13/2007 914.85 914.91
5/2/2007 915.06 915.11
9/6/2006 915.87 915.90
Page 3 of 3
Table 2 Water Quality Results
Potable Well:
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2025 ND
12/10/2024 ND
9/24/2024 ‐
9/6/2023 ND
9/14/2022 ND
9/8/2021 ND
9/17/2020 ND
9/9/2019 ND
9/26/2018 ND
9/28/2017 ND
9/27/2016 ND
9/29/2015 ND
9/25/2014 ND
9/26/2013 ND
9/26/2012 ND
9/29/2011 ND
9/14/2010 ND
10/21/2009 ND ND 0.051 ND
Production Well:
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2025 ND
12/10/2024 ND
9/24/2024 ‐
9/6/2023 ND
9/14/2022 ND
9/8/2021 ND
9/17/2020 ND
9/9/2019 ND
Page 1 of 4
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/26/2018 ND
9/28/2017 ND
9/27/2016 ND
9/29/2015 ND
9/25/2014 ND
9/26/2013 ND
9/26/2012 ND
9/29/2011 ND
9/14/2010 ND
10/21/2009 ND ND 0.053 ND
PZ‐3:
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2025 ND
12/10/2024 ND
9/24/2024 ‐
9/6/2023 ND
9/14/2022 ND
9/8/2021 ND
9/17/2020 ND
9/9/2019 ND
9/26/2018 ND
9/28/2017 ND
9/27/2016 ND
9/29/2015 ND
9/25/2014 ND
9/26/2013 ND
9/26/2012 ND
9/29/2011 ND
9/14/2010 ND
10/21/2009 ND ND 0.18 0.65
Page 2 of 4
PZ‐4: Taken out of service May 12, 2020
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2019 ND ND ND ND
9/26/2018 ND ND ND ND
10/20/2017 ND ND ND ND
9/27/2016 ND ND ND 0.074
9/29/2015 ND 16.0 ND 0.052
9/25/2014 ND 23.0 0.092 0.081
9/26/2013 ND 46.4 0.13 0.11
9/26/2012 ND 942 0.14 0.39
9/29/2011 ND 65.3 0.041 0.094
9/14/2010 ND 161 0.15 0.15
10/21/2009 ND 102 0.048 ND
PZ‐6
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2025 ND ND ND 0.11
12/10/2024 ND
9/24/2024 ‐ ND ND 0.11
9/6/2023 ND 15.1 ND 0.14
9/14/2022 ND 124 ND 0.10
9/8/2021 ND ND ND ND
9/17/2020 ND ND ND ND
9/9/2019 ND ND ND 0.10
9/26/2018 ND ND ND 0.18
9/28/2017 ND ND ND 0.072
9/27/2016 ND 134 ND 0.20
9/29/2015 ND ND ND 0.061
9/25/2014 ND ND 0.058 0.084
9/26/2013 ND ND 0.079 0.071
9/26/2012 ND ND 0.077 ND
9/29/2011 ND ND 0.071 ND
9/14/2010 ND 11.7 0.098 0.084
10/21/2009 ND 11.3 0.1 ND
Page 3 of 4
Pond
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2025 ND*** 10.3 ND ND
12/10/2024 N/A**
9/24/2024 ‐ 3.2 ND ND
9/6/2023 ND ND ND ND
9/14/2022 ND ND ND ND
9/8/2021 ND ND ND ND
9/17/2020 ND ND ND ND
9/9/2019 ND ND ND ND
9/26/2018 ND ND ND ND
9/28/2017 ND ND ND ND
9/27/2016 ND 11.0 ND 0.061
9/29/2015 ND ND ND 0.96
9/25/2014 ND ND 0.096 ND
9/26/2013 ND ND 0.089 ND
9/26/2012 ND ND 0.078 ND
9/29/2011 ND ND 0.069 ND
11/5/2010 ND NA NA NA
9/14/2010 .11* ND 0.057 ND
10/21/2009 ND ND ND ND
** Not accessible due to ice conditions.
Background data has been collected voluntarily for PZ‐5, MW‐1 and MW‐2 in the past and is available upon request.
***Upon Detection of Diesel Range Organics (DRO) samples were run again using the Silica Gel Clean up method to remove organic (non‐
petroleum) DRO detections. Analytical results using the Silica Gel Cleanup method were all non‐detect.
*Upon Detection of Diesel Range Organics (DRO) above the reporting limit of 0.10 mg/l, the sample was further analysed for the presence
of Polycyclic Aromatic Hydrocarbons (PAHs) which were not detected. As additional follow up, the pond was resampled for DRO in
November, 2010 at the request of the City.
Page 4 of 4
Table 3 Production Well Records
Scandia Mine
Pumping Records: 2025
Production Well
Month Amount Pumped (Gal)
January 0
February 0
March 0
April 26,935
May 170,817
June 90,079
July 160,391
August 194,845
September 95,683
October 138,758
November 64,809
December 3,432
945,749 Total Pumped in 2025:
Water Appropriation Permit authorizes withdrawal of up to
30 million gallons per year.
Figures
TILLER
MINE
MINING
LIMITS
MINING
LIMITS
MINING
LIMITS
DRESEL
MINE
COMMON
MINING
BORDER
Engineering, PLLC.
SundeFigure 1
Aerial Photo
Annual Operators Permit
Aerial image collected via UAV on October 9, 2025 over active
portions of Mine and Bing WMS Aerial Photo over remaining areas.
10
0
'
50
'
PEMBg
PEMB
PEMB
PEMB
PEMC
PSS1B
PEMB
PUBG
PEMB
PEMC
PEMB
PEMB
PEMB
PSS1B
PEMC
PEMCx
PEMB
PEMC
PEMC
PUBG
PUBG
PFO1C
PEMC
PSS1/3B
PEM/SS1B
PEMC
PEMA
PEMC
PEMC
PEMC
PEMB
PEMB
SS1
PSS1B
PEMC
PEMC
PSS1B
PEMC
PEMC
PUBG
218TH ST. N.
PSSIB
PEMF
PEMC
PEMC
STOCKPILE AND
PROCESSING
AREA
(Future Mining)
RECLAIMED
AREA
RECLAIMED
AREA
RECLAIMED
AREA
MINING
LIMITS
SCREENING BERM
LOCKING
GATE
MINING
LIMITS
MINING
LIMITS
RECLAIMED
AREA
HAUL RD. TO
LOFTON AVE.
DRESEL MINE
TILLER MINE
2026 POTENTIAL
MINING AREA
2026 POTENTIAL
MINING AREA
HAUL
ROAD
LOCKING
GATE
LOCKING
GATE
S
C
R
E
E
N
I
N
G
B
E
R
M
Maintain 50'
Wetland Setback
2026 POTENTIAL
RECLAMATION
AREAMaintain 50'
Wetland Setback
2026 POTENTIAL RECLAMATION AREA -
INCLUDES RECLAMATION OF A PORTION
OF THE GROUNDWATER POND
STAFF GAUGE
INSTALLED AT
NORTH END OF
GROUNDWATER
POND
COMMON MINING BORDER
MW-1
PZ-5
PZ-6
PZ-3
PRODUCTION
WELL
SCALE HOUSE
WELL
RECLAIMED
AREACURRENT LIMITS
OF EXCAVATION
INTO
GROUNDWATER
SHEET NO:
DATE:
DRAWN BY:
CHECKED BY:
SCALE:
APPROVED BY:
PROJECT NO.:
REG. NO.:DATE:
I HEREBY CERTIFY THAT THIS PLAN,
SPECIFICATION, OR REPORT WAS PREPARED
BY ME OR UNDER MY DIRECT SUPERVISION
AND THAT I AM A DULY LICENSED
PROFESSIONAL ENGINEER UNDER THE LAWS
OF THE STATE OF MINNESOTA.
DESCRIPTION:
INFORMATION:
REVISIONDATE
Engineering, PLLC.
CONSULTING CIVIL ENGINEERS
10830 NESBITT AVENUE SOUTH
BLOOMINGTON, MINNESOTA 55437
(952) 881-3344 TELEPHONE
(952) 881-1913 FAX
www.sundecivil.com
Sunde
Kirsten Pauly
93-253
KP
Graphic
1/29/2026
KP
2 of 3
Figure 2
218421/29/2026
SITE PLAN
TILLER
CORPORATION
SCANDIA,
MINNESOTA
ANNUAL
OPERATORS PERMIT
NOTES:
1. TOPOGRAPHY WITHIN MINE LIMITS FROM 10/09/2025 UMV FLIGHT.
REMAINING TOPOGRAPHIC INFORMATION FROM 2011 LiDAR
ELEVATION, TWIN CITIES METRO REGION, MINNESOTA
2. SETBACKS. THE FOLLOWING MINING SETBACKS WILL BE MAINTAINED:
·50' FROM PROPERTY LINE
·200' FROM OCCUPIED STRUCTURES
·100' FROM ANY CONTIGUOUS PROPERTY SUBDIVIDED
INTO RESIDENTIAL LOTS OF FIVE (5) ACRES OR LESS
(NOT APPLICABLE)
·100' FROM ROAD R-O-W
PROCESSING AREA SHOWN REFLECTS CURRENT
CONDITION. PROCESSING AREAS WILL CHANGE
WITH THE PROGRESSION OF MINING. MULTIPLE
PROCESSING OPERATIONS MAY BE LOCATED
THROUGHOUT THE PROCESSING AREA OR
AREAS. CERTAIN PROCESSING OPERATIONS
REQUIRE EQUIPMENT TO BE PLACED NEAR THE
VARIOUS MATERIALS NEEDED TO MAKE SPECIFIC
PRODUCTS AND OTHER PROCESSING
OPERATIONS NEED TO BE PLACED IN A MANNER
THAT AVOIDS CONFLICTS WITH THE ACTUAL
MINING.
ADDITIONAL MINING MAY BE REQUIRED IN POTENTIAL
RECLAMATION AREAS.
Mining Limit
950
980
970
940
950 960 970 980
990
930
950960970
970
980
9
9
0
980
990
10
0
0
1010
930
940
960
980
1000
95
09609
7
0
980
9
4
0
9
5
0
96
0
9
3
0
940
950
9
6
0
970
9
8
0
950
9
5
0
960
96
0
940
9
5
0
960
950
9
5
0
960
960
95
0
96
0
97
0
950
960
960
960
97
0
970
980
9
9
0
94
0
95
0
96
0
97
0
930
940
950
96
0
930
940
9
5
0
960
9
6
0
960
9
5
0
950
9
6
0
9
6
0
960
9
6
0
960
9
6
0
9
7
0
9
7
0
97
0
98
0
9
8
0
960
97
0
9
3
0
9
5
0
990
9
4
0
970
980
9
8
0
9
9
0
9
9
0
990
1000
1
0
0
0
10
0
0
1010
1010
94
0
95
0
96
0
97
0
98
0
99
0
930
9
4
0
960
9
4
0
950
93
0
9
4
0
9
5
0
9
6
0
9
7
0
9
8
0
9
9
0
10
0
0
1
0
1
0
9
5
0
9
6
0
9
7
0
9
8
0
980
980
9
8
0
98
0
9
9
0
99
0
99
0
9
9
0
1
0
0
0
1
0
0
0
1000
10
0
0
1010
10
1
0
1
0
1
0
950
960
960
960970
9
7
0
980
980
9
7
0
9
7
0
970
9
8
0
980
980
98
0
970
9
8
0
96
0
960
9
7
0
9
8
0
9
9
0
9
4
0
95
0
960
9
6
0
97
0
9
7
0
92
0
9
3
0
9
4
0
9
5
0
9
6
0
97
0
9
7
0
9
7
0
9
8
0
980
980
9
8
0
980
98
0
9
8
0
990
99
0
9
9
0 990
990
99
0
990 9
9
0
99
0
10
0
0
1000
1
0
0
0
96
0
97
0
9
8
0
98
0
990
99
0
9
9
0
99
0
9
9
0
1
0
0
0
100
0
96096
0
9
7
0
97
0
9
8
0
9
9
0
1
0
0
0
1
0
1
0
9
6
0
96
0
97
0
980
9
7
0
10
0
0
95
0
970
94095
0
960
93
0
980
990
97
0
9
5
0
95
0
96
0
960
9
4
0
9
5
0
960
930
W.E.
933.3
22044
Z 995.730
22045Z 989.820
11043E 692146.185N 120313.240
22046Z 950.800
MA
N
N
I
N
G
AV
E
N
U
E
EAST 1223.25
S 89°22'12" W 1422.96
S 89°41'05" W 1287.61
S 89°19'52" W 1277.99
N 89°57'12" E 2649.44 S 89°44'30" E 693.00
N 89°52'27" E 983.08
N
5
°
4
2
'
4
3
"
E
6
2
3
.
5
1
N 89°37'35" E
631.03
R
=
2
2
9
1
.
8
2
=
0
°
2
6
'
0
5
"
L
=
1
7
.
3
9
R
=
1
9
0
9
.
8
6
=
9
°
5
7
'
3
2
"
L
=
3
3
1
.
9
6
N
1
2
°
2
3
'
4
6
"
E
9
0
6
.
9
4
N
1
°
2
5
'
5
6
"
E
1
4
2
0
.
4
6
N
0
°
3
5
'
3
1
"
W
1
3
1
7
.
7
6
S
1
°
0
1
'
2
0
"
E
1
3
2
5
.
7
9
S 41
°
5
3
'
2
2
"
W
363
.
7
0
S
1
7
°
4
4
'
2
2
"
W
42
8
.
1
6
L = 331.96
= 9°57'32"
R = 1909.86
L = 331.96
= 9°57'32"
R = 1909.86
L = 331.96
= 9°57'32"
R = 1909.86
24
9
.
3
4
S
0
°
0
1
'
4
5
"
W
6
5
9
.
6
2
S
0
°
3
3
'
4
3
"
E
1
3
1
9
.
6
0
19
7
8
.
5
7
50' SETBACK
4:1 SLOPES
S 89°31'35"W
65.46
NSP CO. EASEMENT
R
=
1
9
8
0
.
9
7
=
2
0
°
2
9
'
5
4
"
L
=
6
7
4
.
3
8
963.2
955.5
958.5
956.9
964.4
962.4969.7962.4
958.2
962.9
961.3
97
0
9
5
0
9
7
0
960
9
4
0
972.8
960.2
973.8 968.9 966.3 959.2 951.3 945.2
942.6
945.6
962.4
945.2
940.8
940.2
944.2
950.7
954.4
957.6
958.3
957.6
953.7
948.8
962.3
956.1
961.9
972.7
994.9
969.4
969.6
965.5981.3
974.5
930.4
939.9
956.8968.6
974.4
959.0
928.2
958.2
962.9
986.7
50' SETBACK
GATE
L
O
F
T
O
N
R
O
A
D
970
980
960
950
940
920
930
950
960
99
0
98
0
97
0
96
0
95
0
94
0
93
0
92
0
94
0
93
0
92
0
95
0
96
0
97
0
98
0
99
0
960
9
6
0
950
92
0
940
9
3
0
916±
100 FEET
VARIES
MINIMUM TOPSOIL AND
SEEDED TO ESTABLISH
NATIVE VEGETATION
6:1 SLOPE FOR A
HORIZONTAL
DISTANCE OF 100'
SLOPE VARIES
- 4:1 MAX.
1 4
6:1 SLOPE
6
1
VARIES
SLOPE VARIES
- 3:1 MAX.
1 3
TYPICAL SECTION
EDGE OF WATER BODY
DEPTH
VARIES
218TH ST. N.
LO
F
T
O
N
A
V
E
.
N
.
1000
10
0
0
990
980
970
9
7
0
9
8
0
9
9
0
970
980
960
950
940
920
930
950
960
99
0
98
0
97
0
96
0
95
0
94
0
93
0
92
0
94
0
93
0
92
0
95
0
96
0
97
0
98
0
99
0
960
9
6
0
950
92
0
940
9
3
0
1000
930
940 950 960 970 980 990
1000
932
934
936 938
922
924
926
928
9
3
0
94
0
950
96
0
PROPOSED FUTURE LAKE CONFIGURATION
WATER ELEVATION AT 916+/-
BOTTTOM OF LAKE AT 870-890
4.I
SHEET NO:
DATE:
DRAWN BY:
CHECKED BY:
SCALE:
APPROVED BY:
PROJECT NO.:
REG. NO.:DATE:
I HEREBY CERTIFY THAT THIS PLAN,
SPECIFICATION, OR REPORT WAS PREPARED
BY ME OR UNDER MY DIRECT SUPERVISION
AND THAT I AM A DULY LICENSED
PROFESSIONAL ENGINEER UNDER THE LAWS
OF THE STATE OF MINNESOTA.
DESCRIPTION:
INFORMATION:
REVISIONDATE
T. , R. , S. #DRAWING: \\kirstenspc\DWGS\a-Tiller - All\Tiller Scandia\Annual Operators Permit\AOP 2026\Figure 3 - 2026 AOP Mining and Reclamation Plan.dwg LAYOUT: C3 11x17
Engineering, PLLC.
CONSULTING CIVIL ENGINEERS
10830 NESBITT AVENUE SOUTH
BLOOMINGTON, MINNESOTA 55437
(952) 881-3344 TELEPHONE
(952) 881-1913 FAX
www.sundecivil.com
Sunde
KIRSTEN PAULY
93-253
KP
Graphic
1/29/2026
3 of 3
Figure 3
218421/29/2026
GL7,8 2032 93-253
MINING AND
RECLAMATION
PLAN
600300300
TILLER
CORPORATION
SCANDIA,
MINNESOTA
ANNUAL
OPERATORS PERMIT
Martin Marietta
2026 Annual Operators Permit Application
January 2026
Attachment 1
2025 Lab Report
pacelabs.com 1700 Elm Street SE, Minneapolis, MN 55414
October 10, 2025
Paul Schultz
Barton Sand and Gravel Scandia
7200 Hemlock Lane, Suite 200
PO Box 1480
Maple Grove, MN 55311
RE: Barton Sand & Gravel Scandia - Revised Report
Pace Field P/N: 25-09636 - Pace Lab P/N: 10748968
Annual 2025 BS&G - Scandia Pit 741
Dear Mr Schultz,
1. Cover Letter
2. Lab Report
3. FDLS
Respectfully,
Annie Steinmetz
Project Manager
CC: Ms Christina Morrison
(612) 494-3280
Please find enclosed results and FDLS from our recent monitoring event at Barton Sand &
Gravel Scandia - Revised Report, Pace Field P/N: 25-09636 - Pace Lab P/N: 10748968.
The enclosed materials relate to the Annual 2025 BS&G - Scandia Pit 741 event conducted
September 9, 2025. The following documents are included with this submittal:
This report was revised on October 6, 2025 to include WIDRO LV GCS Silica Gel on Pond,
and provides results for the following five monitoring points: PZ-3, PZ-6, Pond, Production
Well, and Potable Well. It was revised again on October 10, 2025 to add clarifying language
to cover letter.
Thank you for the opportunity to serve Barton Sand and Gravel Scandia. If you have any
questions regarding this report, please contact me at your convenience.
#=CL#
October 06, 2025
LIMS USE: FR - ANNIE STEINMETZ
LIMS OBJECT ID: 10748968
10748968
Project:
Pace Project No.:
RE:
Annie Steinmetz
Pace Analytical Services - Field Services
1700 Elm Street SE
Minneapolis, MN 55414
25-09636 2025 Scandia Pit 741-Revised Report
Dear Annie Steinmetz:
Enclosed are the analytical results for sample(s) received by the laboratory on September 09, 2025. The results relate only
to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the
laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report.
The test results provided in this final report were generated by each of the following laboratories within the Pace Network:
• Pace Analytical Services - Minneapolis
This report was revised on October 6, 2025, to include WIDRO LV GCS Silica Gel on Pond (10748968003).
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Annika Asp
annika.asp@pacelabs.com
Project Manager
(612)607-1700
Enclosures
cc:Brad Jacobson, Pace Analytical Services - Field Services
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 1 of 18
#=CP#
CERTIFICATIONS
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Pace Analytical Services, LLC - Minneapolis MN
1700 Elm Street SE, Minneapolis, MN 55414
Alabama Certification #: 40770
Alaska Contaminated Sites Certification #: 17-009
Alaska DW Certification #: MN00064
Arizona Certification #: AZ0014
Arkansas DW Certification #: MN00064
Arkansas WW Certification #: 88-0680
California Certification #: 2929
Colorado Certification #: MN00064
Connecticut Certification #: PH-0256
DoD Certification via A2LA #: 2926.01
EPA Region 8 Tribal Water Systems+Wyoming DW
Certification #: via MN 027-053-137
Florida Certification #: E87605
Georgia Certification #: 959
Idaho Certification #: MN00064
Illinois Certification #: 200011
Indiana Certification #: C-MN-01
Iowa Certification #: 368
ISO/IEC 17025 Certification via A2LA #: 2926.01
Kansas Certification #: E-10167
Kentucky DW Certification #: 90062
Kentucky WW Certification #: 90062
Louisiana DEQ Certification #: AI-03086
Louisiana DW Certification #: MN00064
Maine Certification #: MN00064
Maryland Certification #: 322
Michigan Certification #: 9909
Minnesota Certification #: 027-053-137
Minnesota Dept of Ag Approval: via MN 027-053-137
Minnesota Petrofund Registration #: 1240
Mississippi Certification #: MN00064
Missouri Certification #: 10100
Montana Certification #: CERT0092
Nebraska Certification #: NE-OS-18-06
Nevada Certification #: MN00064
New Hampshire Certification #: 2081
New Jersey Certification #: MN002
New York Certification #: 11647
North Carolina DW Certification #: 27700
North Carolina WW Certification #: 530
North Dakota Certification via A2LA #: R-036
North Dakota Certification via MN #: R-036
Ohio DW Certification #: 41244
Ohio VAP Certification (1700) #: CL101
Oklahoma Certification #: 9507
Oregon Primary Certification #: MN300001
Oregon Secondary Certification #: MN200001
Pennsylvania Certification #: 68-00563
Puerto Rico Certification #: MN00064
South Carolina Certification #:74003001
Tennessee Certification #: TN02818
Texas Certification #: T104704192
Utah Certification #: MN00064
Vermont Certification #: VT-027053137
Virginia Certification #: 460163
Washington Certification #: C486
West Virginia DEP Certification #: 382
West Virginia DW Certification #: 9952 C
Wisconsin Certification #: 999407970
Wyoming UST Certification via A2LA #: 2926.01
USDA Permit #: P330-19-00208
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 2 of 18
#=SS#
SAMPLE SUMMARY
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Lab ID Sample ID Matrix Date Collected Date Received
10748968001 Potable Well Water 09/09/25 14:15 09/09/25 15:28
10748968002 Production Well Water 09/09/25 12:45 09/09/25 15:28
10748968003 Pond Water 09/09/25 13:50 09/09/25 15:28
10748968004 PZ-3 Water 09/09/25 12:00 09/09/25 15:28
10748968005 PZ-6 Water 09/09/25 11:20 09/09/25 15:28
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 3 of 18
#=SA#
SAMPLE ANALYTE COUNT
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Lab ID Sample ID Method
Analytes
ReportedAnalysts
10748968001 Potable Well WI MOD DRO 2TT2
10748968002 Production Well WI MOD DRO 2TT2
10748968003 Pond WI MOD DRO 2ARA
WI MOD DRO 2TT2
EPA 8270E by SIM 18JNG
SM 2540D 1AMC2
EPA 350.1 1JFP
SM 4500-P F 1EPT
10748968004 PZ-3 WI MOD DRO 2TT2
10748968005 PZ-6 WI MOD DRO 2TT2
SM 2540D 1AMC2
EPA 350.1 1JFP
SM 4500-P F 1EPT
PASI-M = Pace Analytical Services - Minneapolis
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 4 of 18
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Sample: Potable Well Lab ID: 10748968001 Collected: 09/09/25 14:15 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 09/11/25 08:2109/10/25 10:430.098 1
Surrogates
n-Triacontane (S)104 %.09/11/25 08:2109/10/25 10:4350-150 1
Sample: Production Well Lab ID: 10748968002 Collected: 09/09/25 12:45 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 09/11/25 08:2909/10/25 10:430.096 1
Surrogates
n-Triacontane (S)71 %.09/11/25 08:2909/10/25 10:4350-150 1
Sample: Pond Lab ID: 10748968003 Collected: 09/09/25 13:50 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS Silica Gel
WDRO C10-C28 ND mg/L 10/06/25 09:4209/10/25 10:430.096 1
Surrogates
n-Triacontane (S)78 %.10/06/25 09:4209/10/25 10:4332-125 1
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 0.10 mg/L 09/11/25 08:3609/10/25 10:430.096 1
Surrogates
n-Triacontane (S)103 %.09/11/25 08:3609/10/25 10:4350-150 1
Analytical Method: EPA 8270E by SIM Preparation Method: EPA 3511
Pace Analytical Services - Minneapolis
8270E MSSV PAH by SIM LV
Acenaphthene ND ug/L 09/11/25 15:46 83-32-9 L209/10/25 16:440.040 1
Acenaphthylene ND ug/L 09/11/25 15:46 208-96-8 L209/10/25 16:440.040 1
Anthracene ND ug/L 09/11/25 15:46 120-12-7 L209/10/25 16:440.040 1
Benzo(a)anthracene ND ug/L 09/11/25 15:46 56-55-3 L209/10/25 16:440.040 1
Benzo(a)pyrene ND ug/L 09/11/25 15:46 50-32-8 L209/10/25 16:440.040 1
Benzo(b)fluoranthene ND ug/L 09/11/25 15:46 205-99-2 L209/10/25 16:440.040 1
Benzo(g,h,i)perylene ND ug/L 09/11/25 15:46 191-24-2 L209/10/25 16:440.040 1
Benzo(k)fluoranthene ND ug/L 09/11/25 15:46 207-08-9 L209/10/25 16:440.040 1
Chrysene ND ug/L 09/11/25 15:46 218-01-9 L209/10/25 16:440.040 1
Dibenz(a,h)anthracene ND ug/L 09/11/25 15:46 53-70-3 L209/10/25 16:440.040 1
Fluoranthene ND ug/L 09/11/25 15:46 206-44-0 L209/10/25 16:440.040 1
Fluorene ND ug/L 09/11/25 15:46 86-73-7 L209/10/25 16:440.040 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 5 of 18
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Sample: Pond Lab ID: 10748968003 Collected: 09/09/25 13:50 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: EPA 8270E by SIM Preparation Method: EPA 3511
Pace Analytical Services - Minneapolis
8270E MSSV PAH by SIM LV
Indeno(1,2,3-cd)pyrene ND ug/L 09/11/25 15:46 193-39-5 L209/10/25 16:440.040 1
Naphthalene ND ug/L 09/11/25 15:46 91-20-3 L209/10/25 16:440.040 1
Phenanthrene ND ug/L 09/11/25 15:46 85-01-8 L209/10/25 16:440.040 1
Pyrene ND ug/L 09/11/25 15:46 129-00-0 L209/10/25 16:440.040 1
Surrogates
2-Fluorobiphenyl (S)85 %.09/11/25 15:46 321-60-8 1M,C609/10/25 16:4461-134 1
p-Terphenyl-d14 (S)78 %.09/11/25 15:46 1718-51-009/10/25 16:4453-145 1
Analytical Method: SM 2540D
Pace Analytical Services - Minneapolis
2540D Total Suspended Solids
Total Suspended Solids 10.3 mg/L 09/12/25 17:372.5 1
Analytical Method: EPA 350.1
Pace Analytical Services - Minneapolis
350.1 Ammonia
Nitrogen, Ammonia ND mg/L 09/10/25 10:15 7664-41-70.10 1
Analytical Method: SM 4500-P F Preparation Method: SM 4500-P B
Pace Analytical Services - Minneapolis
SM4500P-F, Total Phosphorus
Phosphorus ND mg/L 09/15/25 14:39 7723-14-009/15/25 11:340.10 1
Sample: PZ-3 Lab ID: 10748968004 Collected: 09/09/25 12:00 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 09/11/25 08:4409/10/25 10:430.098 1
Surrogates
n-Triacontane (S)86 %.09/11/25 08:4409/10/25 10:4350-150 1
Sample: PZ-6 Lab ID: 10748968005 Collected: 09/09/25 11:20 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 09/11/25 08:5109/10/25 10:430.10 1
Surrogates
n-Triacontane (S)89 %.09/11/25 08:5109/10/25 10:4350-150 1
Analytical Method: SM 2540D
Pace Analytical Services - Minneapolis
2540D Total Suspended Solids
Total Suspended Solids ND mg/L 09/12/25 17:352.5 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 6 of 18
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Sample: PZ-6 Lab ID: 10748968005 Collected: 09/09/25 11:20 Received: 09/09/25 15:28 Matrix: Water
Parameters Results Units DF Prepared Analyzed CAS No. QualReport Limit
Analytical Method: EPA 350.1
Pace Analytical Services - Minneapolis
350.1 Ammonia
Nitrogen, Ammonia ND mg/L 09/10/25 10:17 7664-41-70.10 1
Analytical Method: SM 4500-P F Preparation Method: SM 4500-P B
Pace Analytical Services - Minneapolis
SM4500P-F, Total Phosphorus
Phosphorus 0.11 mg/L 09/15/25 14:39 7723-14-009/15/25 11:340.10 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 7 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
1028807
EPA 3511
EPA 8270E by SIM
8270E Water PAH by SIM MSSV LV
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples: 10748968003
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK: 5358348
Associated Lab Samples:10748968003
Matrix: Water
Analyzed
Acenaphthene ug/L ND 0.040 09/11/25 12:40
Acenaphthylene ug/L ND 0.040 09/11/25 12:40
Anthracene ug/L ND 0.040 09/11/25 12:40
Benzo(a)anthracene ug/L ND 0.040 09/11/25 12:40
Benzo(a)pyrene ug/L ND 0.040 09/11/25 12:40
Benzo(b)fluoranthene ug/L ND 0.040 09/11/25 12:40
Benzo(g,h,i)perylene ug/L ND 0.040 09/11/25 12:40
Benzo(k)fluoranthene ug/L ND 0.040 09/11/25 12:40
Chrysene ug/L ND 0.040 09/11/25 12:40
Dibenz(a,h)anthracene ug/L ND 0.040 09/11/25 12:40
Fluoranthene ug/L ND 0.040 09/11/25 12:40
Fluorene ug/L ND 0.040 09/11/25 12:40
Indeno(1,2,3-cd)pyrene ug/L ND 0.040 09/11/25 12:40
Naphthalene ug/L ND 0.040 09/11/25 12:40
Phenanthrene ug/L ND 0.040 09/11/25 12:40
Pyrene ug/L ND 0.040 09/11/25 12:40
2-Fluorobiphenyl (S)%.108 61-134 09/11/25 12:40
p-Terphenyl-d14 (S)%.111 53-145 09/11/25 12:40
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5358349LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5358350
Acenaphthene ug/L 2.0 L2210159-1250ND 20
Acenaphthylene ug/L 2.0 L229863-1250ND 20
Anthracene ug/L 1.9 L229657-1250ND 20
Benzo(a)anthracene ug/L 1.8 L229257-1250ND 20
Benzo(a)pyrene ug/L 2.0 L229852-1250ND 20
Benzo(b)fluoranthene ug/L 2.1 L2210554-1280ND 20
Benzo(g,h,i)perylene ug/L 1.7 L228747-1280ND 20
Benzo(k)fluoranthene ug/L 2.2 L2211254-1250ND 20
Chrysene ug/L 2.0 L2210056-1250ND 20
Dibenz(a,h)anthracene ug/L 1.6 L228149-1250ND 20
Fluoranthene ug/L 1.9 L229457-1250ND 20
Fluorene ug/L 2.1 L2210462-1250ND 20
Indeno(1,2,3-cd)pyrene ug/L 1.6 L228153-1250ND 20
Naphthalene ug/L 1.9 L229357-1250ND 20
Phenanthrene ug/L 2.0 L229958-1250ND 20
Pyrene ug/L 1.9 L229554-1270ND 20
2-Fluorobiphenyl (S)%.104 61-134118
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 8 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5358349LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5358350
p-Terphenyl-d14 (S)%.95 53-145108
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 9 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
1033096
WI MOD DRO
WI MOD DRO
WIDRO Low Volume GCS w/Cleanup
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples: 10748968003
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK: 5380096
Associated Lab Samples:10748968003
Matrix: Water
Analyzed
WDRO C10-C28 mg/L ND 0.10 10/06/25 09:27
n-Triacontane (S)%.61 32-125 10/06/25 09:27
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5380097LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5380098
WDRO C10-C28 mg/L 0.610.8 76 38-125700.56 9 20
n-Triacontane (S)%.78 32-12569
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 10 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
1028640
WI MOD DRO
WI MOD DRO
WIDRO Low Volume GCS
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples: 10748968001, 10748968002, 10748968003, 10748968004, 10748968005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK: 5357790
Associated Lab Samples:10748968001, 10748968002, 10748968003, 10748968004, 10748968005
Matrix: Water
Analyzed
WDRO C10-C28 mg/L ND 0.10 09/11/25 07:43
n-Triacontane (S)%.82 50-150 09/11/25 07:43
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5357791LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5357792
WDRO C10-C28 mg/L 0.820.8 102 75-115950.76 7 20
n-Triacontane (S)%.106 50-15095
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 11 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
1029253
SM 2540D
SM 2540D
2540D Total Suspended Solids
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples: 10748968003, 10748968005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK: 5360917
Associated Lab Samples:10748968003, 10748968005
Matrix: Water
Analyzed
Total Suspended Solids mg/L ND 2.5 09/12/25 17:36
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5360918LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5361574
Total Suspended Solids mg/L 95.7100 96 80-1209998.9 3 10
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 12 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
1028635
EPA 350.1
EPA 350.1
350.1 Ammonia
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples: 10748968003, 10748968005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK: 5357768
Associated Lab Samples:10748968003, 10748968005
Matrix: Water
Analyzed
Nitrogen, Ammonia mg/L ND 0.10 09/10/25 10:07
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5357769LABORATORY CONTROL SAMPLE:
LCSSpike
Nitrogen, Ammonia mg/L 2.52.5 100 90-110
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5357770MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10748849001
5357771
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Nitrogen, Ammonia mg/L 2.5 100 90-110100 0 202.52.0 4.5 4.5
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5357772MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10748950001
5357773
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Nitrogen, Ammonia mg/L 2.5 101 90-110101 1 202.5ND 2.5 2.6
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 13 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
1029206
SM 4500-P B
SM 4500-P F
SM4500P-F, Total Phosphorus
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples: 10748968003, 10748968005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK: 5360640
Associated Lab Samples:10748968003, 10748968005
Matrix: Water
Analyzed
Phosphorus mg/L ND 0.10 09/15/25 14:13
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5360641LABORATORY CONTROL SAMPLE:
LCSSpike
Phosphorus mg/L 2.52.5 100 90-110
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5360642MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10748196002
5360643
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Phosphorus mg/L 2.5 100 80-120108 7 202.5ND 2.6 2.8
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5360644MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10748325001
5360645
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Phosphorus mg/L 5 103 80-12098 4 2051.2 6.4 6.2
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 14 of 18
#=QL#
QUALIFIERS
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL - Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean-Up
U - Indicates the compound was analyzed for, but not detected.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as
"Total" may vary slightly from the sum of the reported component parameters.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
WORKORDER QUALIFIERS
WO: 10748968
Samples were received outside of the recommended temperature range of 0-6 degrees Celsius. The samples were
received from the field on ice.[1]
BATCH QUALIFIERS
Batch: 1028885
A matrix spike/matrix spike duplicate was not performed for this batch due to insufficient sample volume.[M5]
Batch: 1028968
A matrix spike/matrix spike duplicate was not performed for this batch due to insufficient sample volume.[M5]
Batch: 1033496
A matrix spike/matrix spike duplicate was not performed for this batch due to insufficient sample volume.[M5]
ANALYTE QUALIFIERS
Incorrect sample volume received. Desired amount decanted and extracted . The sample container could not be rinsed
with solvent per the method requirement.1M
Result confirmed by reanalysis conducted outside of the method specified holding time.C6
Analyte recovery in the laboratory control sample (LCS) was below QC limits. Results for this analyte in associated
samples may be biased low.L2
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 15 of 18
#=CR#
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Project No.:
Project:
10748968
25-09636 2025 Scandia Pit 741-Revised Report
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
Analytical
Batch
10748968003 1033096 1033496PondWI MOD DRO WI MOD DRO
10748968001 1028640 1028885Potable Well WI MOD DRO WI MOD DRO
10748968002 1028640 1028885Production Well WI MOD DRO WI MOD DRO
10748968003 1028640 1028885PondWI MOD DRO WI MOD DRO
10748968004 1028640 1028885PZ-3 WI MOD DRO WI MOD DRO
10748968005 1028640 1028885PZ-6 WI MOD DRO WI MOD DRO
10748968003 1028807 1028968PondEPA 3511 EPA 8270E by SIM
10748968003 1029253PondSM 2540D
10748968005 1029253PZ-6 SM 2540D
10748968003 1028635PondEPA 350.1
10748968005 1028635PZ-6 EPA 350.1
10748968003 1029206 1029551PondSM 4500-P B SM 4500-P F
10748968005 1029206 1029551PZ-6 SM 4500-P B SM 4500-P F
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/06/2025 11:24 AM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 16 of 18
Page 17 of 18
9/10/2025
Page 18 of 18
Outlook
Tiller 2026 AOP Application - 2025 Groundwater Monitoring Data Review
From Dave Hume <Dave.Hume@spherosenv.com>
Date Wed 3/4/2026 3:07 PM
To Greenlee Dahle <Greenlee.Dahle@bolton-menk.com>; Jeffrey Matzke <jeff.matzke@bolton-menk.com>
Cc TJ Hofer <tj.hofer@bolton-menk.com>
1 attachment (164 KB)
Groundwater Hydrographs and Precip (through 10_17_25).pdf;
*** WARNING: This email is from outside the company. Proceed with Caution***
Greenlee and Jeff,
Spheros Environmental (formerly LRE Water) has reviewed the 2025 groundwater monitoring data
provided in Martin Marietta's 2026 AOP Application for their sand and gravel operation on Manning
Ave., City of Scandia, MN. Our review comments and recommendations are provided below:
All groundwater levels, water quality, and pumping volumes reported are in compliance. The
observation wells (piezometers) and pond hydrographs (Figure 1) are updated to include the 2025 water
level data through November 11, 2025. Annual precipitation data from the National Weather Service for
the Minneapolis-St. Paul area are also included on the graph.
2025 Groundwater Monitoring Data Review
From November 2024 through April 2025 groundwater levels remained stable. From April 2025
through November 2025 levels increased by an average of approximately 0.56 feet and were
approximately 3 feet higher than the lowest levels measured in 2010.
As reported in previous years, groundwater level changes are the result of local and regional
changes in precipitation and are unrelated to mining operations and pumping the production
well.
The groundwater flow direction across the site is generally to the north and is consistent with
previous data
Groundwater samples were collected from the monitoring well and piezometers, and production
well and potable well on September 9, 2025. As required by the monitoring plan, select samples
were analyzed for total suspended solids, ammonia nitrogen, phosphorus, and Diesel Range
Organics (DRO). DRO was not detected above the method detection limit in any of the samples.
These and the other analyte results indicate no groundwater quality concerns. The pond was not
sampled due to ice cover.
The 2025 groundwater monitoring was completed in accordance with the approved monitoring
plan.
2025 Pumping
The production well pumped 945,749 gallons in 2025 which is well below the permitted amount
of 30 million gallons per year.
2025 Recommendations
Continue groundwater level monitoring and sampling in accordance with the approved
Monitoring Plan, ensuring all data collection, analysis, and reporting requirements are met.
Continue to delineate and map the proposed excavation area(s) where mining activities are
expected to intersect the water table, updating figures and supporting documentation as
necessary.
Please contact me if you have any questions or need additional information.
Regards,
Dave Hume, PG | Senior Scientist | Hydrogeologist
Spheros Environmental
612-805-0919
dave.hume@spherosenv.com
www.spherosenvironmental.com
2025 Annual Report
Recycling Facility
Barton Sand & Gravel Co. / Martin Marietta – Scandia
A Martin Marietta Materials, Inc. company
Facility: Barton Sand & Gravel Co. / Martin Marietta – Scandia
22303 Manning Trail
Scandia, MN
Reporting Year: 2025
Type and weight of materials handled at the facility:
During 2025, approximately 44,000 tons of recycled asphalt products (RAP) were
imported to the site for recycling, and 25,000 tons of RAP was used in the production of
hot mix asphalt or similar.
Quantity of chunks processed during reporting year: 0 tons
Quantity of chunks on-site at year end: 17,000 tons
Quantity of RAP on-site at year end: 90,000 tons
The distribution of materials by weight: see above
Approximate weight of material being stored for greater than one year:
Chunks: 17,000 tons
RAP: 46,000 tons
Concrete and asphalt chunks 100,000 tons $180,000 to process material Barton Sand & Gravel Co.
$180,000
$PODSFUFBOEBTQIBMUDIVOLTXJMMCFQSPDFTTFE DSVTIFE
UPQSPEVDFSFDZDMFDMBTT
XIJDIJTBTBMFBCMFQSPEVDU
DPNNPOMZVTFEJOSPBEDPOTUSVDUJPO
/"
/"
/"
/"
#BSUPO4BOE(SBWFM$P
)FNMPDL-BOF/
.BQMF(SPWF
./
4UFWFO%4BVFS
April8
20
&YFDVUJWF71$00
Minnesota District Office
7200 Hemlock Lane, Suite 200, PO Box 1480, Maple Grove, MN 55311
www.martinmarietta.com
Interoffice Memorandum
DATE: 02/20/2026
TO: Washington County
FROM: Bobby Foust
Safety Manager
SUBJECT: Solid Waste Facility License – Personnel Training Records
This memo is to certify that all Martin Marietta Materials, Inc. field personnel undergo initial and 8-
hours of annual refresher safety training including Emergency Action notification and response
procedures. This training is conducted for all Minnesota field employees prior to the operating season
each calendar year.
Records of training are maintained for all employees in our Maple Grove office. If you have any
questions, I can be reached at (763)425-4191.
Date of Meeting: March 18, 2025
To: Honorable Mayor and Members of the City Council
From: T.J. Hofer, Consultant City Planner
Re: Annual Operators Permit (AOP) for Martin Marietta Mine at 22303
Manning Trail
RECEIVED COMPLAINT
Background
The City was contacted by Jon Lindel, 11240 218th St N, who’s property abuts the southwest
border of the mine, on December 21, 2024, regarding concerns about impacts to their property as
a result of the mining activity on the Marietta site. City Administrator Morell and City Planner
Hofer met with Lindel on January 30, 2025, to discuss Lindel’s concerns. At the time staff asked
Lindel to submit their concerns in writing to be included in the report for the 2025 AOP
application. General concerns from Lindel were received on February 3, 2025, with more
specific concerns being submitted to the City on February 26, 2025. Both of these are attached to
this report. The specific concerns submitted on February 26, 2025, are:
1) What is the depth of excavation measured from the ground level at the common
border for Tiller and adjacent property of Lindell and to the bottom of the created lake on
Tiller property directly north of the Tiller/Lindell border?
2) Item 12 of the AOP discusses water monitoring. What is the extent of
groundwater level monitoring? Provide historical groundwater depth that Tiller monitors
near the Tiller/Lindell border.
3) Provide details, including a summary of PCA investigation of Tillers chemical
contaminations in the Tiller mine in the past.
4) Explain the Washington County response to Tiller’s request to excavate into the
groundwater prior to Scandia becoming a city when regulatory oversight changed.
Include dates and decisions by Washington County in text. Confirm whether Washington
County prohibited excavation into the groundwater.
5) Provide an ariel photo of the Lindell pond that is current as of 2024 that includes
the Tiller boundary with Lindell property. This photo should be in color and represent the
same mapping as was shown in Tiller’s March 10, 2022 response to Lindell email. This
Martin Marietta AOP – 2025 Staff Memo
is identified as Item 1 of Tiller’s response, which is an aerial photo through Washington
County dated 2020.
Staff requested clarification from Lindel, email attached, and provided information to Lindel as it
was available as part of the AOP submittal. This information included Figure 2 Site Plan (that
shows monitoring wells) and Table 1 Scandia Groundwater Elevation Data from the January 30,
2025, submittal. These concerns were forward to Marietta on March 3, 2025.
Marietta has provided a response to the concerns which is attached and copied below:
1. The depth of excavation from the ground level at the common border of Tiller and
Lindell property to the lake is approximately 80 feet and the depth of excavation to
the bottom of the created lake has varied from between 15 ft and 50 ft feet below the
water table during years when mining below the water table has occurred.
2. The water level monitoring network consists of five (5) wells and one (1) staff gauge
located in the on-site pond. The water levels are collected monthly while operating
and are provided in the annual report to the City. The groundwater level data has been
reported since 2006 and includes 19 years of data to-date. The closest water level
monitoring point to the Tiller/Lindell border would be well “MW-1” which is
approximately 850 linear feet to the east of the Lindell border.
3. Tiller operates its’ mining sites with a great deal of corporate responsibility. Tiller has
substantial safeguards built into its’ operations as a result of the various permitting
requirements and company polices. Safeguards include proper storage and handling
of fuels, equipment maintenance protocols, spill prevention, spill response and
reporting policies, maintaining a spill clean-up kit, and on-going routine employee
training. All of this is documented in the Spill Prevention Control and
Countermeasure Plan (SPCC) for the Site.
The reason so many safeguards are in place is that we are operating in areas where
sand and gravel are present. Sand and gravel are permeable materials. The equipment
operating at our various sites is mechanical in nature. Equipment contains and
operates on petroleum products including fuels, hydraulic oils and lubricating oils. It
is known that mechanical equipment can breakdown or fail. In certain instances, these
breakdowns or failures may cause a petroleum release. For this reason, Tiller is very
diligent about having our SPCC Plans, safeguards, and training up-to-date and in
place.
During any given year, we will have hundreds of pieces of equipment operating and
thousands of customer trucks visiting our various sites. Company-wide, any spills of
five gallons or more of petroleum products or any volume of hazardous materials are
reported to the State Duty Officer as required by applicable State statutes and
regulations (Minn. Stat. 299K).
There have not been any Minnesota Pollution Control Agency investigations of the
Tiller Site in the 2000’s. If a reportable spill occurs, it is reported to the Minnesota
Martin Marietta AOP – 2025 Staff Memo
State Duty Officer and cleaned-up in accordance with the rules.
The groundwater quality data collected to-date indicates that there has not been any
contamination or degradation of groundwater.
4. The Conditional Use Permit (CUP) issued by Washington County that was in effect
prior to Scandia’s incorporation as a city set a maximum excavation depth above the
groundwater because the mining phases that were active at that time had not yet
extended to the groundwater table. The County issued five-year permits and the 2005
CUP application supplied by Tiller included mining below the groundwater table. The
Site had undergone two environmental assessment worksheets (EAW) in the past and
mining into the unconfined aquifer was evaluated during both processes. The County
followed-up with additional review which resulted in an extension to the permitting
process such that the additional review intercepted the timeline in which New Scandia
Township incorporated as a City in 2007 and became the permitting authority of the
Site. In 2008, the City of Scandia issued a CUP to Tiller which based on the results of
the EAW allowed mining below the groundwater table.
Washington County does not prohibit excavation into the groundwater. The
Washington County Development Code, Chapter Seven Mining Regulations, Section
5.5 Protection of Water Tables states that, “Excavation into unconfined (emphasis
added) aquifers must be closely monitored and conducted according to the conditions
of the permit.” The County and the City both allow mining into unconfined aquifers.
In addition, they both prohibit excavation into confined aquifers. Excavation into the
groundwater at the Scandia Site is taking place in an unconfined aquifer.
5. Please find the requested aerial photo, an updated Washington County Drought
Monitoring Report, as well as the March 10, 2022 response.
The applicant has also submitted information regarding precipitation levels in the area that
correlate with a decrease in water levels of surface water, with drought conditions being seen in
most of the last four years. Additionally, a letter from the applicant from March 10, 2022,
addressing similar concerns was submitted by the applicant.
Lindel submitted another statement that is attached on March 7, 2025, which is attached. In the
statement they recommended the following:
1) Deny the AOP request to excavate any further into the groundwater. This would be
consistent with Washington County Board's previous mining restrictions when it
approved mining operations prior to when Scandia became a city and took over review
and approval of mining operating conditions.
2) Require that Tiller respond and cooperate with inquiries from Jon Lindell and other
parties including the DNR.
3) Increase the mining setback requirement from all adjoining properties to 200 feet.
Martin Marietta AOP – 2025 Staff Memo
4) Require that Tiller and/or its successor Martin Marietta provide a water restoraration
plan that restores water levels to the Lindell pond prior to when excavation into the
groundwater was requested and permitted by the Scandia Council.
A statement regarding groundwater flow was also submitted by Lindel.
Staff Analysis
Staff reached out to the DNR and the South District Hydrologist Supervisor informed the City
that the DNR has been in contact with Lindel over the last several months. The DNR informed
Lindel that:
1) DNR does not regulate mining activity, so we cannot regulate mine operations that
may decrease watershed runoff into his pond, and 2) DNR conducted a standard desktop
review, and found no evidence that the low pond water levels were related to the DNR-
authorized appropriation of groundwater at the mine site.
We recently committed to Mr. Lindel that the DNR will conduct a more detailed
hydrogeologic investigation of his complaint. The DNR has a significant queue of
groundwater investigations; we estimate it will be about 1+ years before we can
investigate it further.
If there is a documented issue from a qualified professional that shows a detrimental impact to
Lindel’s property, enforcement from the City would include amendments to or revocation of the
CUP. Based on the statement from the DNR, there is no evidence that the water level of the pond
on Lindel’s property and the mining activities from Marietta are correlated.
Protection of groundwater is required per 5.6 of the Mining Ordinance:
The maximum depth of excavation shall be established so that groundwater quality and
quantity are protected. This depth of excavation shall be established by the City and will
be based, in part, upon soil characteristics, depth to groundwater, nature of mining
proposed, and local use of the aquifer. Mining shall not be allowed in confined aquifers.
Excavation into unconfined aquifers must be closely monitored and conducted according
to the conditions of the permit. Dewatering for the purposes of mining shall not be
allowed. If it is determined in the course of mining that the mining operation has
negatively impacted a well by lowering yields or water quality, the operator of the mine
shall be responsible for providing a new well for the property.
No extraction operations shall be conducted in such a manner as to permanently lower the
water table of surrounding properties or any other water body, wetland, or groundwater
dependent natural resources.
At this time, staff has not received any data, study, or evaluation from a qualified professional
that shows any impact on surround water bodies originating from the Marietta site. Washington
County’s prior determinations are not required to be reviewed as they relate to the determinations
of the City of Scandia as a separate entity. The mining setback is consistent with the approved
plans and the Mining Ordinance, therefore there is no rational basis for an increase. A restoration
Martin Marietta AOP – 2025 Staff Memo
plan for an offsite location from the mining site would only be a reasonable condition for the
City to apply if there was documented impacts from a qualified professional showing that
Marietta was responsible for the water levels of a surrounding water body being reduced.
At this time, nothing has been observed by or submitted to the City that would indicate a
violation of the conditions of the original approvals or the reoccurring AOPs for the site. Staff
recommends that the Council not take Lindel’s recommendation to deny the AOP because the
DNR has not found evidence that the low pond water levels were related to the DNR-authorized
appropriate of groundwater at the mine site, the applicant currently maintains a permit with the
CMSCWD, and the City’s consultant from LRE has stated that the groundwater levels are
consistent and should continue to be monitored.
Additionally, Lindel’s property appears to be located in the “Potential 2025 Reclamation” area of
the submitted site plan. When the site is reclaimed, mining will no longer take place in the
property that abuts Lindel’s property and a number of the concerns expressed by them may be
addressed.
If the Council wishes staff to further review the concern, Council should provide direction as to
how to move forward. Staff believes the future hydrogeologic investigation that the DNR has
described will be important to review as it relates to the concern.
1
TJ Hofer
From:Kyle Morell <k.morell@ci.scandia.mn.us>
Sent:Thursday, February 27, 2025 10:19 AM
To:TJ Hofer
Subject:Fw: Questions for Tiller re: 2025 AOP Application
Attachments:Outlook-nonn4fet; Questions for Tiller re groundwater and 2025 AOP.docx
Kyle H. Morell
City Administrator
City of Scandia
14727 209th Street North
Scandia, MN 55073
Phone: 651.433.2274 Fax: 651-433-5112
Cell: 651.245.2654
Web: www.cityofscandia.com
Email: k.morell@ci.scandia.mn.us
From: jon lindel <jon.scandia@gmail.com>
Sent: Wednesday, February 26, 2025 2:37 PM
To: Kyle Morell <k.morell@ci.scandia.mn.us>; b.eklund <b.eklund@ci.scandia.mn.us>
Subject: Questions for Tiller re: 2025 AOP Application
Kyle, see attached Qs that are pertinent to the Tiller AOP and groundwater impacts. Pls forward to Tiller
and others who will be advising the Scandia Council on the AOP Application.
Questions for Tiller re: groundwater and mining in Scandia
1) What is the depth of excavation measured from the ground level at
the common border for Tiller and adjacent property of Lindell and to
the bottom of the created lake on Tiller property directly north of the
Tiller/Lindell border?
2) Item 12 of the AOP discusses water monitoring. What is the extent of
groundwater level monitoring? Provide historical groundwater depth
that Tiller monitors near the Tiller/Lindell border.
3) Provide details, including a summary of PCA investigation of Tillers
chemical contaminations in the Tiller mine in the past.
4) Explain the Washington County response to Tiller ’s request to
excavate into the groundwater prior to Scandia becoming a city when
regulatory oversight changed. Include dates and decisions by
Washington County in text. Confirm whether Washington County
prohibited excavation into the groundwater.
5) Provide an ariel photo of the Lindell pond that is current as of 2024
that includes the Tiller boundary with Lindell property. This photo
should be in color and represent the same mapping as was shown in
Tiller’s March 10, 2022 response to Lindell email. This is identified as
Item 1 of Tiller’s response, which is an aerial photo through
Washington County dated 2020.
1
TJ Hofer
From:jon lindel <jon.scandia@gmail.com>
Sent:Friday, March 7, 2025 9:35 AM
To:Kyle Morell; TJ Hofer; b.eklund
Subject:Fwd: Pics
Attachments:IMG_20241112_152553191_BURST000_COVER.jpg; IMG_20241024_131820078_HDR.jpg;
IMG_20241024_131811377_HDR.jpg
Kyle and TJ,
This is my recommendation for the Council to address the groundwater issue with Tiller that has
rreduced my pond to about 60%
of its prvious coverage and depth. I am attaching three photos to this email - one that shows the
significant dropoff near my property due to excavation,
the other two show the loss off water in the pond. This area was formally covered in water and now its
dryed up and filled with
vegitation. I think a site visit later this Spring would be appropiate and confirm my claims.
I will send another email after this one that contains an explanation of how groundwater works. My pond
was spring fed prior
to the massive excavation near my property by Tiller. All this information will be useful to the Council to
understand and make informed
decisions.
My recommendations for the Council regarding the Annual Operating Permit Application (AOP).
1) Deny the AOP request to excavate any further into the groundwater. This would be consistent
with Washington County Board's previous mining restrictions when it approved mining operations
prior to when Scandia became a city and took over review and approval of mining operating conditions.
2) Require that Tiller respond and cooperate with inquiries from Jon Lindell and other parties including
the DNR.
3) Increase the mining setback requirement from all adjoining properties to 200 feet.
4) Require that Tiller and/or its successor Martin Marietta provide a water restoraration plan that restores
water levels to the Lindell pond prior to when excavation into the groundwater was requested and
permitted by
the Scandia Council.
jl
1
TJ Hofer
From:jon lindel <jon.scandia@gmail.com>
Sent:Friday, March 7, 2025 9:38 AM
To:Kyle Morell; TJ Hofer; b.eklund
Subject:Fwd: groundwater flow explained
This explanation would be helpful to the Council for its consideration of Tiller's AOP.
Subject: groundwater flow explained
Groundwater flow is the movement of water underground through soil and rock. It's a vital
part of the water cycle, supplying water to wells, rivers, lakes, and wetlands.
How does groundwater flow occur?
Gravity and pressure: Gravity and pressure differences drive groundwater flow.
Permeability: The size and connectivity of spaces in soil and rock affects the speed
and direction of groundwater flow.
Hydraulic head: Water pressure affects the rate of groundwater flow.
Why is groundwater flow important?
Water resources: Groundwater flow is essential for managing water resources and
protecting groundwater quality.
Ecosystems: Groundwater flow is vital for maintaining ecosystems.
Drought and flooding: Understanding groundwater flow helps address issues
related to drought and flooding.
Upper Midwest Region
7200 Hemlock Lane, Suite 200, PO Box 1480, Maple Grove, Minnesota 55311
t.(763) 425-4191 f. (763) 425-7173
www.martinmarietta.com
March 13, 2025
Kyle Morell, City Administrator
City of Scandia
14727 209th St. N
Scandia, MN 55073
Dear Mr. Morell:
This letter is written in response to a list of questions from Mr. John Lindell, to the City of Scandia and
received by Tiller Corporation, a Martin Marietta Materials, Inc. company (herein referred to as Tiller) on
March 3, 2025 regarding Tiller’s 2025 AOP Application for our Scandia mine (Site).
Tiller takes comments from its’ neighbors seriously. The email received from Mr. Lindell prompted
an evaluation of the matters raised and Tiller offers the following responses:
1.What is the depth of excavation measured from the ground level at the common border for Tiller and
adjacent property of Lindell and to the bottom of the created lake on Tiller property directly north of
the Tiller/Lindell border?
The depth of excavation from the ground level at the common border of Tiller and Lindell
property to the lake is approximately 80 feet and the depth of excavation to the bottom of the
created lake has varied from between 15 ft and 50 ft feet below the water table during years
when mining below the water table has occurred.
2.Item 12 of the AOP discusses water monitoring. What is the extent of groundwater level monitoring?
Provide historical groundwater depth that Tiller monitors near the Tiller/Lindell border.
The water level monitoring network consists of five (5) wells and one (1) staff gauge located in
the on-site pond. The water levels are collected monthly while operating and are provided in the
annual report to the City. The groundwater level data has been reported since 2006 and includes
19 years of data to-date. The closest water level monitoring point to the Tiller/Lindell border
would be well “MW-1” which is approximately 850 linear feet to the east of the Lindell border.
3.Provide details, including a summary of PCA investigation of Tillers chemical contaminations in the
Tiller mine in the past.
Tiller operates its’ mining sites with a great deal of corporate responsibility. Tiller has substantial
safeguards built into its’ operations as a result of the various permitting requirements and
March 13, 2025
Page 2
company polices. Safeguards include proper storage and handling of fuels, equipment
maintenance protocols, spill prevention, spill response and reporting policies, maintaining a spill
clean-up kit, and on-going routine employee training. All of this is documented in the Spill
Prevention Control and Countermeasure Plan (SPCC) for the Site.
The reason so many safeguards are in place is that we are operating in areas where sand and
gravel are present. Sand and gravel are permeable materials. The equipment operating at our
various sites is mechanical in nature. Equipment contains and operates on petroleum products
including fuels, hydraulic oils and lubricating oils. It is known that mechanical equipment can
breakdown or fail. In certain instances, these breakdowns or failures may cause a petroleum
release. For this reason, Tiller is very diligent about having our SPCC Plans, safeguards, and training
up-to-date and in place.
During any given year, we will have hundreds of pieces of equipment operating and thousands of
customer trucks visiting our various sites. Company-wide, any spills of five gallons or more of
petroleum products or any volume of hazardous materials are reported to the State Duty Officer
as required by applicable State statutes and regulations (Minn. Stat. 299K).
There have not been any Minnesota Pollution Control Agency investigations of the Tiller Site in
the 2000’s. If a reportable spill occurs, it is reported to the Minnesota State Duty Officer and
cleaned-up in accordance with the rules.
The groundwater quality data collected to-date indicates that there has not been any
contamination or degradation of groundwater.
4. Explain the Washington County response to Tiller’s request to excavate into the groundwater prior to
Scandia becoming a city when regulatory oversight changed. Include dates and decisions by
Washington County in text. Confirm whether Washington County prohibited excavation into the
groundwater.
The Conditional Use Permit (CUP) issued by Washington County that was in effect prior to
Scandia’s incorporation as a city set a maximum excavation depth above the groundwater
because the mining phases that were active at that time had not yet extended to the
groundwater table. The County issued five-year permits and the 2005 CUP application supplied
by Tiller included mining below the groundwater table. The Site had undergone two
environmental assessment worksheets (EAW) in the past and mining into the unconfined
aquifer was evaluated during both processes. The County followed-up with additional review
which resulted in an extension to the permitting process such that the additional review
intercepted the timeline in which New Scandia Township incorporated as a City in 2007 and
became the permitting authority of the Site. In 2008, the City of Scandia issued a CUP to Tiller
which based on the results of the EAW allowed mining below the groundwater table.
Washington County does not prohibit excavation into the groundwater. The Washington County
Development Code, Chapter Seven Mining Regulations, Section 5.5 Protection of Water Tables
states that, “Excavation into unconfined (emphasis added) aquifers must be closely monitored
March 13, 2025
Page 3
and conducted according to the conditions of the permit.” The County and the City both allow
mining into unconfined aquifers. In addition, they both prohibit excavation into confined
aquifers. Excavation into the groundwater at the Scandia Site is taking place in an unconfined
aquifer.
5. Provide an aerial photo of the Lindell pond that is current as of 2024 that includes the Tiller boundary
with Lindell property. This photo should be in color and represent the same mapping as was shown in
Tiller’s March 10, 2022 response to Lindell email. This is identified as Item 1 of Tiller’s response,
which is an aerial photo through Washington County dated 2020.
Please find the requested aerial photo, an updated Washington County Drought Monitoring
Report, as well as the March 10, 2022 response.
Please let me know if you have any questions or require additional information on this matter. I may be
reached at (763) 425-4191.
Sincerely,
Christina Morrison
Regional Land Manager
Enc
0 200 400100Feet¯
2024 Aerial Ph oto - Scandia
Tiller Prope rty
Tiller Prope rty
Aerial Photo Source: Washington County
218th Street
Linde ll Property
Minnesota District
7200 Hemlock Lane, Suite 200, PO Box 1480, Maple Grove, Minnesota 55311
t. (763) 425-4191 f. (763) 425-7173
www.martinmarietta.com
March 10, 2022
Ken Cammilleri, City Administrator
City of Scandia
14727 209th St. N
Scandia, MN 55073
Dear Mr. Cammilleri:
This letter is written in response to an email dated March 7, 2022 from Mr. John Lindell, to the City of
Scandia and received by Tiller Corporation, a Martin Marietta Materials, Inc. company (herein referred to
as Tiller) on March 7, 2022 regarding Tiller’s 2022 AOP Application for our Scandia mine (Site). The email
from Mr. Lindell expressed three separate matters, which include: utilizing current aerial imagery for use
in the AOP application, changes to the surface expression for nearby wet features and mining into the
groundwater. Tiller takes comments from its neighbors seriously. The email received from Mr. Lindell
prompted an evaluation of the matters raised and Tiller offers the following responses.
1. Matters Pertaining to Use of Aerial Imagery in the AOP
a. Mr. Lindell recommends that Tiller’s AOP approval be delayed and Tiller provides an accurate, up
to date aerial photo of the mining property and adjacent properties.
The City of Scandia requires aerial photos to be included in the AOP for the purpose of showing
the active mining area and location of the active stockpiling area.
Figure 3: Aerial Photo includes an aerial photo captured by an unmanned aerial vehicle (UAV) for
areas within the Site, dated September 13, 2021. The aerial photo shows the active mining area
and location of the active stockpiling area, which complies with the City’s required use of aerial
imagery in the AOP. Use of the UAV is limited to Tiller property.
For areas outside of the Tiller property, the most current aerial photo available through
Washington County is used, which is dated 2020.
2. Matters Pertaining to the Surface Expression of Nearby Features
a. Mr. Lindell shared observations that “ponds” on and near his property have exhibited a drier
surface expression more recently in comparison to a few years ago when a wetter surface
expression was present.
These observations are not surprising when considering the precipitation and estimated relative
soil moisture conditions during this timeframe within our local region. Review of the
precipitation trends is important because surface water in the form of precipitation is largely
March 10, 2022
Page 2
what influences the characteristics of the shallow depressions associated with the moraine
southwest of the Site. The shallow wet depressions and wetland features located in the area
have been described in the past as being perched, which means the feature is underlain by a low
permeability layer that allows water to perch. These features have water levels that are perched
above the regional water table, thereby relying more on precipitation to maintain wet
characteristics.
With this in-mind, we could expect to see changes in the surface expression of these features in
response to precipitation and climatic trends. The precipitation graph shown below as Figure 1:
Annual Precipitation (2016-2021) illustrates annual precipitation from 2016 through 2021 for
the Lower St. Croix River area. From 2016 through 2018, there was a decline in annual
precipitation followed by a substantial peak in annual precipitation in 2019 and a subsequent
decline through 2021. The peak in annual precipitation for the years mentioned above occurred
in 2019 and correlates with observations that wetter conditions occurred a few years ago.
Figure 1: Annual Precipitation (2016-2021)
We can also look at the Palmer Drought Severity Index (PDSI) to inform on the surface expression
of the wetlands in the subject area. The PDSI is a standardized index based on a simplified soil
water balance and estimates relative soil moisture conditions. The magnitude of PDSI indicates
the severity of the departure from normal conditions. A PDSI value >4 represents very wet
conditions, while a PDSI <-4 represents an extreme drought. Figure 2: PDSI (2016-2021) illustrates
the PDSI in the month of July for the Lower St. Croix River area from 2016 through 2021. As shown
in the figure, from 2016 through 2018 there was a decline in the PDSI or estimate of the relative
soil moisture conditions. Then, in 2019 and 2020, the PDSI indicates very wet conditions followed
by significant drought conditions in 2021.
March 10, 2022
Page 3
With the exception of a spike in precipitation in 2019, the annual precipitation had been declining
over the last six years in the Lower St. Croix River area. The PDSI also indicates a downward trend
in estimated relative soil moisture conditions for the last six years during the month of July, with
the exception of the very wet conditions in July of 2019 and July 2020. The drought conditions in
2021 represent a more significant departure toward dry conditions experienced more recently.
The variations in precipitation and estimated relative soil moisture help demonstrate the range in
seasonal variations that can occur each year. For features in the landscape that are influenced by
and respond to precipitation and soil moisture, it can be expected that observable changes will
occur in response to these conditions as they change over time.
A review of a few aerial photos, both historical and recent helps illustrate the range in surface
expressions for the shallow depressions in the area. To provide an area of reference, a yellow
outline is made around the wet perimeter of a feature located in the area subject to Mr. Lindell’s
comment. The yellow outline is based on the wet perimeter as indicated on a 2020 Washington
County aerial photo. Aerial images included are 1970, 2009 and 2020.
3. Matters Pertaining to Mining into the Groundwater
a. Mr. Lindell describes that when Scandia became a City and assumed regulatory authority over
mining, Tiller was authorized to excavate into the groundwater and goes on to suggest that
Washington County prohibits excavation into groundwater.
Washington County does not prohibit excavation into the groundwater. The Washington County
Development Code, Chapter Seven Mining Regulations, Section 5.5 Protection of Water Tables
states that, “Excavation into unconfined (emphasis added) aquifers must be closely monitored
and conducted according to the conditions of the permit.” The County and the City both allow
mining into unconfined aquifers. In addition, they both prohibit excavation into confined
Figure 2: PDSI (2016-2021)
March 10, 2022
Page 4
aquifers. Excavation into the groundwater at the Scandia Site is taking place in an unconfined
aquifer.
Tiller operates its’ mining sites with a great deal of responsibility. As a leader in the aggregate mining
industry in Minnesota, Tiller recognizes the importance of protecting our water resources. Tiller has and
will continue to operate the Site in accordance with local, state and federal rules and regulations.
Please let me know if you have any questions or require additional information on this matter. I may be
reached at (763) 425-4191.
Sincerely,
Christina Morrison, P.G.
Environmental Engineer II
Enc
Tiller Property
Tiller Property
218th Street
¯0 200 400100Feet
1970 Aerial Photo - Scandia
Aerial Photo Source: HIG
Tiller Property
Tiller Property
218th Street
¯0 200 400100Feet
2009 Aerial Photo - Scandia
Aerial Photo Source: NAIP
Tiller Property
Tiller Property
218th Street
¯0 200 400100Feet
2020 Aerial Photo - Scandia
Aerial Photo Source: Washington County