NCG060328_DMR_20200831

August 31, 2020
PET Dairy R E C 77°yV E
2221 N Patterson Avenue
Winston Salem,North Carolina 27105 SEP 0 8 2020
Central Files �'� riv, ` t.:E
vt_.';TION
Division of Water Quality
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
Dear Sir or Madam:
Since two consecutive bi-annual storm water samplings, as required by our permit, had exceeded our
benchmark values for COD and TSS for three of the four outfall locations,we had increased our program
management protocols from Tier II to Tier I, requiring monthly sampling of the problem outfall locations
for the measures that exceeded benchmarks(P1, P2, W1). The latest water sampling is summarized below
and a copy from the lab included with this letter.
SamplesTaken COD Oil&Grease pH TSS
07/16/2020 Mg/L Mg/L . Std.Units Mg/L
Benchmark 120 30 6.0-9.0 100
Outfall P1 35 <5 6.91 32.4
Outfall P2 114 <5 7.06 424
Outfall P3 397 <5 6.89 620
Outfall WI 109 <5 5.62 28.8
We are working to identify and mitigate the COD and TSS problems at outfalls with a sweeping and
parking lot maintenance program that includes repairing and replacing deteriorated sections.
Certificate of Coverage(COC)No.:NCG060328
Sincerely,
Matthew H. Brooks
Senior EHS Manager
[phone]
[e-mail]