NCG160140_DMR_20201005

Semi-annual Stormwater Discharge Monitoring Report (DMR)
for North Carolina DEMLR General Permit No. NCG160000 - Asphalt
Date submitted - /0- e-Zo2 o
CERTIFICATE OF COVERAGE NO. NCG16 0140 SAMPLE COLLECTION YEAR 2020
FACILITY NAME D&S Asphalt Materials.Inc. SAMPLE PERIOD ❑Jan-June fro July-Dec
COUNTY Polk or ❑ Monthly' (month)
PERSON COLLECTING SAMPLES Matt Davis DISCHARGING TO CLASS ❑ORW ❑HQW ETrout fPNA
LABORATORY Pace National Lab Cert.# ENV375 Zero-flow ❑Water Supply USA
Comments on sample collection or analysis: (Other Class C
, s I .I
Part A: Stormwater Benchmarks and Monitoring Results
No discharge this period?''
Outfall No. Date Sample 24-hour rainfall
Collected' amount, Total Suspended Solids
(mo/dd/yr) Inches
Benchmarks===> - - 100 mg/L or 50 mg/L4
SDO-1 9/17/2020 2.75 23.6
'Monthly sampling(instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a check mark 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. 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, quantitation limit, etc. in mg/L.
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:08/01/2019-05/31/2024 SWU-252, last revised 09/04/2019
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
No discharge this period?'
Outfall No. Date Sample 24-hour rainfall New Motor Oil or Hydraulic
Collected) amount, Non-polar O&G by EPA Oil Usage,Annual average
Total Suspended Solids
(mo/dd/yr) Inches3 1664(SGT-HEM) gal/mo
Benchmarks===> - - 15 mg/L 100/L or 50 mg/L4 -
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 SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO
IF YES,HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE AS REQUIRED BYTHE PERMIT? YES ❑NO❑
REGIONAL OFFICE CONTACT NAME:
Mail an original and one 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 Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
1,1 I t F) •s'; •
"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 aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
/0 Za
(Signs a of Per ittee) (Date)
Permit Date:08/01/2019-05/31/2024 SWU-252, last revised 09/04/2019
Page 2 of 2

October 2, 2020
D&S Asphalt Materials REr-• ��f
265 Hugh Champion Road ED
Tryon, North Carolina 28782 OCT 12 2020
Attention: Mr. Matt Davis FILFQ
S`ECTIOPJ
Reference: Stormwater Sampling Report
D&S Asphalt Materials
Tryon, North Carolina
S&ME Project No.4341-19-018
S&ME, Inc. Engineering License Certification No. F-0176
Dear Mr. Davis:
S&ME, Inc. is providing stormwater reporting services on behalf of the D&S Asphalt Materials facility in Tryon,
North Carolina. Our services were performed in general accordance with S&ME Proposal 43-1900925 dated
December 5, 2019.
Stormwater Sampling Event
On September 17, 2020, Mr. Matt Davis with D&S Asphalt Materials collected a stormwater sample from the
stormwater discharge outfall (SDO) located on the property. The stormwater sample was submitted to Pace
National (Pace)for analysis for Total Suspended Solids (TSS). On-site vehicle maintenance does not take place at
the facility; therefore, the analysis of the stormwater sample for pH and oil &grease by EPA Method 1664E is not
required under the National Pollutant Discharge Elimination System (NPDES) General Permit No. NCG160000. The
table below provides a comparison of the laboratory results with the benchmark values included in the NPDES
General Permit No. NC91 0 associated with the site. The laboratory report and corresponding chain-of-
custody is attached.
• _ � , Table I — Sampling Results
Parameter Laboratory Result Benchmark Value
TSS 23.6 mg/L 100 mg/L
mg/L - milligrams per liter
According to Mr. Davis, the September 17, 2020 rainfall event produced approximately 2.75 inches of
precipitation. S&ME has completed the Stormwater Discharge Outfall Monitoring Report(i.e. quantitative report)
for the September 17, 2020 sampling event. The report is attached. Please review and sign the Stormwater
Discharge Outfall Discharge Monitoring Report.
1 !:+s c

Stormwater Sampling Report
D&S Asphalt Materials
T von North C�3rotina
Please forward one original and one copy of Discharge Monitoring Report to the:
NCDEQ, Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Please retain copies of all documentation for your records.
It is the responsibility of Mr. Davis to complete the Stormwater Discharge Outfall Qualitative Monitoring Report
(i.e. qualitative report)for the September 17, 2020 sampling event. The completed Qualitative Monitoring Report
should be retained on site and not provided to the NCDEQ, unless specifically requested by the NCDEQ.
Sole Use Statement
All materials and information used for this project were obtained by S&ME. This report is provided for the sole use of
D&S Asphalt Materials, Inc. for this project. Use of this report by any parties other than of D&S Asphalt Materials,
Inc. will be at such party's sole risk. S&ME disclaims liability for any use of or reliance on this report by third parties.
Closure
If you have any questions regarding this report, please contact David Loftis at [phone].
Sincerely,
S&ME, Inc.
77,1
tradleyS. Keyge, E.I. avid R. Loftis P.
Associate Project Manager Senior Engineer
[e-mail] [e-mail]
Attachments: Laboratory Report
Stormwater Discharge Outfall Monitoring Report
October 2, 2020 2