NCG060328_DMR_20200227

•
IA/SPo
February 271,2020
RECEIVED
Suiza Dairy Group LLC.
2221 N Patterson Avenue MAR 0 2 2020
Winston Salem,North Carolina 27105 CENTRAL FILES
DWR SECTION
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
10/11/18 Mg/L Mg/L Std.Units Mg/L
Benchmark 120 30 6.0-9.0 100
Outfall P1 <5 <5 7.05 14.6
Outfall P2 18 <5 7.01 8.43
Outfall P3 7 <5 6.60 7.6
Outfall Wl 77 <5 7.02 538
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]

ARESEARCIi & ANAEyTICAI Report of Analysis
LABORATORIES, INC. 2/17/2020
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2221 Patterson Avenue
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Attn: Adam Slack
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Client Sample ID: Road Lab Sample ID: 78209-01
Site: Pet Dairy Collection Date: 2/6/2020 11:00
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
COD EPA 410.4 <5 mg/L 5 HW 2/10/2020
Hydrocarbon O&G EPA 1664 Revision B/Silica Gel <5 mg/L 5 EE 2/12/2020
pH SM 4500 H+B-2011 7.05 Std. Units AB 2/6/2020 1607
Total Suspended Solids SM 2450 D-2011 14.6 mg/L 5 AW 2/7/2020
Client Sample ID: Guard House Lab Sample ID: 78209-02
Site: Pet Dairy Collection Date: 2/6/2020 11:00
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
COD EPA 410.4 18 mg/L 5 HW 2/10/2020
Hydrocarbon O&G EPA 1664 Revision B/Silica Gel <5 mg/L 5 EE 2/12/2020
pH SM 4500 H+B-2011 7.01 Std. Units AB 2/6/2020 1608
Total Suspended Solids SM 2450 D-2011 84.3 mg/L 5 AW 2/7/2020
Client Sample ID: Warehouse Lab Sample ID: 78209-03
Site: Pet Dairy Collection Date: 2/6/2020 11:00
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
COD EPA 410.4 77 mg/L 5 HW 2/10/2020
Hydrocarbon O&G EPA 1664 Revision B/Silica Gel <5 mg/L 5 EE 2/12/2020
pH SM 4500 H+B-2011 7.02 Std. Units AB 2/6/2020 1609
Total Suspended Solids SM 2450 D-2011 538 mg/L 5 AW 2/10/2020
P.O.Box 473 106 Short Street Kernersville,North Carolina 27284 Tel:[phone] Fax:[phone] www.randalabs.com Page 1

RESEARCh & ANALyTICAL Report of Analysis
LAbORATORIES INC.
1 2/17/2020
Client Sample ID: i/C Lab Sample ID: 78209-04
Site: Pet Dairy Collection Date: 2/6/2020 11:00
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
COD EPA 410.4 7 mg/L 5 HW 2/10/2020
Hydrocarbon O&G EPA 1664 Revision B/Silica Gel <5 mg/L 5 EE 2/12/2020
pH SM 4500 H+B-2011 6.60 Std.Units AB 2/6/2020 1612
Total Suspended Solids SM 2450 D-2011 7.6 mg/L 5 AW 2/10/2020
NA=not analyzed
P.O.Box 473 106 Short Street Kernersville,North Carolina 27284 Tel:[phone] Fax:[phone] www.randalabs.com Page 2
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RESEARCh & ANAlyTICAl
LAbORATORIES, INC. CHAIN OF CUSTODY RECORD
• Analytical / Process Consultations
Phone [336) 998-2841
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