NCG550712_Monitoring (Report)_20210128

SwSG Stormwater Services Group, LLC
January 28, 2021
Mitch Hayes
Raleigh RO — Surface Water Protection
NC Division of Water Quality
1628 MSC
Raleigh NC 27699-1628
8916 Oregon Inlet Court
Raleigh, North Carolina 27603
Phone: [phone]
Fax: [phone]
NC Dept of Environmental Quality
l-� ~ 1 7+171
Raleigh Regional Office
RE: Ferrell Property, 3300 Page Rd., Durham NC
NPDES General Permit NCG550712
Mr. Hayes:
In response to your recent request, we have collected a discharge sample from the sand filter and
have analyzed it for the parameters indicated in the General Permit. The results are as follows:
Table 1— Effluent Analysis Results
Outfall
Date
Flow,
Gals/ Day
(est)
BOD5,
mg/L
TSS,
mg/L
pH,
Std. Units
Total
Residual
Chlorine,
mg/L
Fecal
coliform,
MPN/ 100
mL
001
09/13/12
250
5.2
710
7.45
11.8
<4.0
001
06/18/13
250
9.0
140
6.48
6.8
11.0
001
01/20/21
100
25.5
4.7
6.39
> 5.0
< 1.0
The original laboratory report and chain -of -custody form is maintained at the residence.
The next effluent sample will be collected and analyzed in 1" Quarter 2022.
In the meantime, if you have any questions, do not hesitate to call me.
Sincerely,
STOJiMW ILTER SERVICES GROUP, LLC
es D. Frei
Senior Project Manager
cc: James Ferrell
File