6. Staff Report - AE Test ResultsStaff Report
To: Wastewater Advisory Committee
From: Tim Kieffer, Director of Public Works
Date: July 30, 2014
Re: Anderson/Erickson Test Results
Background: Over the past two years staff has been monitoring the wells at the
Anderson/Erickson drainfield. Another round of testing was completed in
May. It should be noted that Washington County no longer requires
samples from well B-deep and only requires that it be used as a
piezometer. Currently cell A is being dosed.
The primary drinking water regulation for nitrate is 10 mg/L. The results
from the May 2014 samples did not have any nitrate concentrations above
the drinking water regulation. A secondary drinking water regulation for
chloride is 250 mg/L. Again, the results were all below the limit.
0
5
10
15
20
25
3/22/2012 10/17/2012 7/16/2013 5/29/2014
mg/L
Date
Nitrate + Nitrite
A-Deep
B-Deep
C-Deep
D-Deep
Limit
0
100
200
300
400
500
600
mg/L
Date
Chloride
A-Deep
B-Deep
C-Deep
D-Deep
Limit