NCG120038_DMR_20200224

DocuSign Envelope ID:OBOEEOE9-6157-4949-B147-C7369DB055F5
SMITH+GARDNER ADDRESS TEL WEB
14 N.Boylan Avenue,Raleigh NC 27603 919.828.0577 www.smithgardnerinc.com
ENGINEERS
February 24, 2020
NCDEQ
Division of Water Quality RECEIVED
Attention: DWQ Central Files
1617 Mail Service Center MAR 0 3 2020
Raleigh, NC 27699-1617 CENTRAL FILES
DWR SECTION
RE: Discharge Monitoring Report—February 2020
Davidson County Landfill
Certificate of Coverage#NCG120038
Dear Sir/Madam:
On behalf of Davidson County, Smith Gardner, Inc. (S+G) is pleased to submit the attached
Discharge Monitoring Report (DMR) and associated analytical report for stormwater
monitoring at the Davidson County Landfill. The facility is permitted to discharge stormwater
related to landfilling activities under Certificate of Coverage(COC) Number NCG120038,
General Permit Number NCG120000. The facility is required to monitor discharge at four (4)
Stormwater Discharge Outfalls: C&D pond, C&D new pond, Phase 2 Pond 3, and Phase 2
Pond 4.
C&D New pond, Phase 2 Pond 3, and Phase 2 Pond 4 exceeded the benchmark threshold for
fecal coliform. Phase 2 Pond 3 and Phase 2 Pond 4 also exceeded the benchmark threshold
for total suspended solids (TSS). In April 2013, S+G submitted a permit modification that
indicated animals were an alternate source for fecal coliform exceedances.
Closure of the C&D landfill was completed in 2018. Davidson County and S+G plan to submit
a permit modification application to reduce or remove monitoring for this facility.
We are providing two (2) copies of the February DMR report for this submittal. If you have any
questions, or require further information, please contact us via phone at [phone] or by
email.
Sincerely,
SMITH GARDNER,INC. DocuSigned by:
,.—DocuSigned by:
11 tZ 4(4±-Zl S c/L---
'-586B31996A6741D7 .
�s 6ces9!i,Etcf. Pieter K. Scheer, P.E.
Staff Engineer, ext. 170 Senior Engineer, ext. 123
jessefasmithgardnerinc.com pieter(asmithgardnerinc.com
Attachments
CC: Steven Sink (Davidson County)
Joan Smyth, P.G. (S+G)
File
H:V'rojects\Davidson County INCIW2 DC Compliance\03 DC NPDES\21.February 2020\OWQnpdes_DavCo_Feb2020.docx

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Energy, Mineral and Land Resources General Permit No. NCG120000
Date submitted February 24,2020
CERTIFICATE OF COVERAGE NO. NCG12 0 0 3 8 SAMPLE COLLECTION YEAR 2020
FACILITY NAME Davidson County Landfill SAMPLE PERIOD 1 j Jan-June n July-Dec
COUNTY Davidson or (ICI Monthly' February- (month)
PERSON COLLECTING SAMPLES Steven Sink DISCHARGING TO CLASS ( ]ORW EHQW ( f Trout 1PNA
LABORATORY Research and Analytical Laboratory Lab Cert.# 34 (Zero-flow (Water Supply [—SA
110ther c
Comments on sample collection or analysis:
- i C E I t+' E D PLEASE REMEMBER TO SIGN ON THE REVERSE -*
MAR 0 3 2020
Part A: Stormwater Benchmarks and Monitoring Results
Div t rvkL FILES I I No discharge this period'
DWR SEC I ION
Date Sample 24-hour rainfall Chemical Oxygen Fecal Coliform Total Suspended pH,
Outfall No. Collected' amount, Demand Colonies per 100 mL Solids Standard Units
(mo/dd/yr) Inches' mg/L mg/L
Benchmarks - - 120 1000 100 or 504 6.0-9.0
Parameter Code - 46529 00340 31616 C0530 00400
C&D Pond 2/11/20 0.5 10 980 37.4
C&D New Pond 2/11/20 0.5 9 3200 13.1
Ph. 2 Pond 3 2/11/20 0.5 14 >12000 876
Ph. 2 Pond 4 2/11/20 0.5 18 >12000 6210
1 Monthly sampling(instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
?For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
'The total precipitation must be recorded using data from an on-site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
A See General Permit text,Table 1, identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Note: Results must be reported in numerical format. For example,do not report Below Detection Limit, BDL,<PQL, Non-detect, ND,or other similar non-
numerical format. When results are below the applicable limits,they must be reported in the format,"<XX mg/L",where XX is the numerical value of the
detection limit, reporting limit,etc. in mg/L. Conversely,where fecal Coliform results exceed the dilution upper limit, report the result as">XX".
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit text.
Permit Date: 11/1/2018-5/31/2021 SWU-248,last revised 11/1/2018
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
I I No discharge this period'
Date Sample Collected' 24-hour rainfall amount, Non-Polar Oil&Grease Total Suspended Solids, New Motor or Hydraulic Oil Usage,
Outfall No.
(mo/dd/yr) Inches' mg/L mg/L gal/mon
Benchmarks _ - 15 100 or 504 —
Parameter Code - 46529 00552 C0530 NCOIL
Footnotes from Part A also apply to this Part B
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit text.
FOR PART A AND PART B MONITORING RESULTS:
• A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES El NO El
IF YES,HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE? YES Q NO❑
REGIONAL OFFICE CONTACT NAME: Jennifer Carter
Mail an original copy of this DMR,including all"No Discharge"reports, within 30 days of receipt of the lab results(or at end of monitoring period in the
case of"No Discharge"reports)to:
Division of Water Quality
Attn:DWQ Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,or
those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete. I
am aw. Ilthagthere are significant penalties for submitting false information,including the possibility of fines and imprisonment for knowing violations."
Signature of Permittee Date
Permit Date: 11/1/2018-5/31/2021 SWU-248,last revised 11/1/2018
Page 2 of 2

DocuSign Envelope ID:OBOEEOE9-6157-4949-B147-C7369DB055F5
Research & Analytical Laboratories, Inc. INVOICE
PO Box 473 997
Kernersville, NC 27285
Phone [phone] Fax [phone] February 17, 2020
Email: [e-mail]
Bill To:
Davidson County Landfill
1211 Davidson Co. Landfill Rd.
Lexington, NC 27292
Attention: Accounts Payable
DESCRIPTION AMOUNT
Project: Stormwater
Samples collected: 02/11/20
Analysis of 4 samples for:
Oil &Grease $ 50.00 per sample $ 200.00
Total Suspended Solids $ 15.00 per sample 60.00
Fecal Coliform -MF $ 20.00 per sample 80.00
TOTAL INVOICE $ 340.00
Make all checks payable to: Research &Analytical Laboratories, Inc.
TERMS: NET 30
"Past due invoices accrue interest at 1 1/2% Interest per month until paid,should collection be required,
customer agrees to pay all expenses incurred including attorney fees."

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DocuSign Envelope ID:OBOEEOE9-6157-4949-B147-C7369DB055F5
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RESEARCh & ANAlyTICA1 Report of Analysis
L.AbORATORIES, INC. 2/15/2020
�A.- b N44L .to
For: Davidson County Landfill '�.„g�.�� �t:
945 North Main Street P. A;
Lexington, NC 27293 `cc!a NC NC#34 °'
S NC#37701 i
Attn: Steven Sink f
Client Sample ID: C&D Pond Lab Sample ID: 78348-01
Site: Davidson Co Landfill Collection Date: 2/11/2020 8:55
Parameter Method Result Units Rea Limit Analyst Analysis Date/Time
COD EPA 410.4 10 mg/L 5 HW 2/11/2020
Fec Coli-MF SM 9222 D-2006 980 col/100 ml 1 BJ 2/11/2020 1354
Total Suspended Solids SM 2450 D-2011 37.4 mg/L 5 AW 2/11/2020
Client Sample ID: C&D New Pond Lab Sample ID: 78348-02
Site: Davidson Co Landfill Collection Date: 2/11/2020 8:46
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
COD EPA 410.4 9 mg/L 5 HW 2/11/2020
Fec Coli-MF SM 9222 D-2006 3200 col/100 ml 1 BJ 2/11/2020 1402
Total Suspended Solids SM 2450 D-2011 13.1 mg/L 5 AW 2/11/2020
Client Sample ID: Phase 2 Pond 3 Lab Sample ID: 78348-03
Site: Davidson Co Landfill Collection Date: 2/11/2020 8:22
l Parameter Method Result Units Rep Limit Analyst Analysis Date/Time I
COD EPA 410.4 14 mg/L 5 HW 2/11/2020
Fec Coli-MF SM 9222 D-2006 >12000 col/100 ml 1 BJ 2/11/2020 1415
Total Suspended Solids SM 2450 D-2011 876 mg/L 5 AW 2/11/2020
Client Sample ID: Phase 2 Pond 4 Lab Sample ID: 78348-04
Site: Davidson Co Landfill Collection Date: 2/11/2020 8:10
Parameter Method Result Units Rea Limit Analyst Analysis Date/Time
COD EPA 410.4 18 mg/L 5 HW 2/11/2020
P.O.Box 473 106 Short Street Kernersville, North Carolina 27284 Tel:[phone] Fax: [phone] www.randalabs.com Page 1

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DocuSign Envelope ID:OBOEEOE9-6157-4949-B147-C7369DB055F5
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RESEARCh & ANALyTICAI•
Report of Analysis
LA ORATORIES INC. 2/15/2020
Client Sample ID: Lab Sample ID:
Site: Collection Date: 8:10
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
Fec Coli-MF SM 9222 D-2006 >12000 col/100 ml 1 BJ 2/11/2020 1424
Total Suspended Solids , SM 2450 D-2011 6210 mg/L 5 AW 2/11/2020
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 N
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