HomeMy WebLinkAboutNCG120038_DMR_September_20201020DocuSign Erdelope ID: CC65372E-FD5A-4957-9E29-AD0726789E96
SMITHAARDNER
October 20, 2020
ADDRESS
0
14 N. Boylan Avenue, Raleigh NC 27603 919.828.0577
NCDEQ
Division of Water Quality
Attention: DWQ Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617 RECEIVED
RE: Discharge Monitoring Report —September 2020 NOV 0 9 2020
Davidson County Landfill
Certificate of Coverage #NCG120038 CENTRAL FILES
DWR SECTION
Dear Sir/Madam:
WEB
www.smithgardnednc.com
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.
All representative outfalls exceeded the benchmark threshold for fecal coliform, and Phase 2
Pond 3 and Phase 2 Pond 4 exceeded the threshold for total suspended solids (TSS1. In April
2013, S+G submitted a permit modification that indicated animals were an alternate source
for fecal coliform exceedance.
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 September DMR report for this submittal. If you have
any questions, or require further information, please contact us via phone at 19191828-0577
or by email.
Sincerely,
SMITH GARDNER, INC.
DocuSigned by:
[ e. a
C5ECC95C937E4AC...
Jesse C. Li, E.I.
Staff Engineer, ext. 170
jesse(asmithgardnerinc.com
Attachments
CC: Steven Sink (Davidson County)
Joan Smyth, P.G. (S+G)
Docuftned by,
E S.A -
SBBB31996A874D7...
Pieter K. Scheer, P.E.
Senior Engineer, ext. 123
pieterfdsmithgardnerinc.com
File
H.\Projects\Davidson County (NCR02 DC Comphan_e\03 DC NPDFS\28. September 2020\DWQnpdes_DavCo_Sep2020 docx
Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Energy, Mineral and Land Resources General Permit No. NCG120000
Date submitted October 20, 2020
CERTIFICATE OF COVERAGE NO. NCG12 0 0 3 8
FACILITY NAME Davidson County Landfill
COUNTY Davidson
PERSON COLLECTING SAMPLES Steven Sink (Davidson County)
LABORATORY Research and Analytical Laboratory Lab Cert. # 34
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2020
SAMPLE PERIOD ❑ Jan -June ❑ July -Dec
or ❑- Monthly' September (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow ❑Water Supply ❑SA
❑N Otherc
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
n No discharge this periodz
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Chemical Oxygen
Demand
mg/L
Fecal Coliform
Colonies per 100 mL
Total Suspended
Solids
mg/L
PH,
Standard Units
Benchmarks
-
-
120
1000
100 or 504
6.0-9.0
Parameter Code
-
46529
00340
31616
C0530
00400
CSD Pond
9/25/20
1.0
24
>12000
62.5
C&D New Pond
9/25/20
1.0
35
>12000
37.5
Ph. 2 Pond 3
9/25/20
1.0
24
>12000
179
Ph. 2 Pond 4
9/25/20
1.0
21
>12000
1090
' Monthly sampling (instead of semi-annual) must begin with the second consecutive DencnmarK exceeoance Tor me same Pdrameter dt lr,C �.dr71C VUL�d��.
'For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3 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.
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 ">W.
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/l/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.
n No dischow this period'
Outfall No.
Date Sample Collected'
(mo/dd/yr)
24-hour rainfall amount,
Inches3
Non -Polar Oil & Grease
mg/L
Total Suspended Solids,
mg/L
New Motor or Hydraulic Oil Usage,
gal/mon
Benchmarks
_
-
15
100 or SO4
—
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 11 SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART 11 SECTION B.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANYONE OUTFALL? YES Q NO ❑
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE? YES 0 NO ❑
REGIONAL OFFICE CONTACT NAME: Jennifer Carter
Mail an original copy of this DMR including all No Discharae" reports within 30 days of receipt of the lab results for at end of monitorina period in the
case of "No Discharae" 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
assur tqualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
thosg�erthat
s directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I
am a eat there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
Signature of Permittee
Permit Date: 11/1/2018-5/31/2021
Date
SWU-248, last revised 11/1/2018
Page 2 of 2
RESEARCh & ANAIYTiCAI
LAbORATORiESF INC.
For: Davidson County Landfill
945 North Main Street
Lexington, NC 27293
Attn: Steven Sink
Report of Analysis
10/6/2020
. • ' •, •
;o
NC #34 i� cn
NC #37701
Client Sample ID: C+D Pond Lab Sample ID: 88100-01
Site: Davidson Co Landfill Collection Date: 9/25/2020 8:21
Parameter Method Result Units Rea Limit Analyst Analysis DateMme 1
COD EPA 410.4 24 mg/L 5 HW 10/4/2020
Fec Coli-MF SM 9222 D-2006 >12000 col/100 ml 1 BJ 9/25/2020 1549
Total Suspended Solids SM 2450 D-2011 62.5 mg/L 5 AW 9/25/2020
Client Sample ID: C+D New Pond Lab Sample ID: 88100-02
Site: Davidson Co Landfill Collection Date: 9/25/2020 8:32
Parameter Method Result Units Rep Limit Analyst Analysis DatefTime
COD EPA 410.4 35 mg/L 5 HW 10/4/2020
Fec Coli-MF SM 9222 D-2006 >12000 col/100 ml 1 BJ 9/25/2020 1555
Total Suspended Solids SM 2450 D-2011 37.5 mg/L 5 AW 9/25/2020
Client Sample ID: Phase 2 Pond 3 Lab Sample ID: 88100-03
Site: Davidson Co Landfill Collection Date: 9/25/2020 9:08
Parameter Method Result Units Rep Limit Analyst Analysis DatelTime
COD EPA 410.4 24 mg/L 5 HW 10/4/2020 II
Fec Coli-MF SM 9222 D-2006 >12000 col/100 ml 1 8J 9/25/2020 1604
Total Suspended Solids SM 2450 D-2011 179 mg/L 5 AW 9/28/2020
Client Sample ID: Phase 2 Pond 4 Lab Sample ID: 88100-04
Site: Davidson Co Landfill Collection Date: 9/2512020 8:53
Parameter _ r� Method _ -_ Result Units Rep Limit Analyst Analysis Date/Time
COD EPA 410.4 21 mg/L 5 HW 10/4/2020
P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel 336-996-2841 Fax. 336-996-0326 www.randalabs corn Page 1
RESEARCh & ANAIyTiCAI Report of Analysis
,
LABORATORIES, INC. 10/6/2020
Client Sample ID: Lab Sample ID:
Site: Collection Date: 8:53
Parameter Method Result Units Rea Limit Analyst Analysis Date/Time
Fec Coli-MF SM 9222 D-2006 >12000 col/100 MI 1 BJ 9/25/2020 1609
Total Suspended Solids SM 2450 D-2011 1090 mg/L 5 AW 9/28/2020
NA = not onolyzed
P O Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336.996-2841 Fax. 336-996-0326 www.randatabs com Page 2
3'
RESEARCh & ANA[yTICAL
LABORATORIES, INC.
Analytical / Process Consultations
Phone [3361 996-284 4
CHAIN OF CUSTODY RECORD
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