NCG060328_DMR_20221013

T
_PEI 0
October 13,2022.
PET Dairy
2221 N Patterson Avenue
Winston Salem,North Carolina 27105
Central Files
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.
Samples Taken COD Oil&Grease pH TSS
10/29/2020 M M /L Std. Units M
Benchmark 120 30 6.0-9.0 100
Outfall P1 37.4 ND 6.3 45.6
Outfall P2 159 ND 6.4 232
Outfall P3 56.5 ND 6.3 781
Outfall WI 469 ND 5.9 15.7
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 $ t7 aP
[phone]
[e-mail]