NCG120012_MONITORING INFO_20190926

M�
STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
0 o b
DOC TYPE
❑ HISTORICAL FILE
MONITORING REPORTS
DOC DATE
❑ d
YYYYMMDD

Bunton Environmental, Inc.
P.O. Box 11550 - Charlotte, Nonh Cumlina 28220
Phone [phone] _ rma11: Buxnmem@hells..wh.net
September 26, 2019
Central Files
Division of Water Resources (DWR)
1617 Mail Service Center
Raleigh, North Carolina 27699
Subject: Semi Annual Stormwater Discharge Monitoring Report, Year I Period 12019
Gaston County Landfill — Hardin Site
3155 Philadelphia Church Road
Dallas, North Carolina
NPDES General Permit No.: NCG120012
Landfill Permit No.: 3606
Dear Central Files,
Enclosed please find a copy of the Semi -Annual Stormwater Discharge Monitoring Report, Year
l Period 1 2019 completed for the subject site. A copy of the complete Analytical & Qualitative
Storm Water Monitoring, Year I Period 1 2019 report dated August 16, 2019, with conclusions
and Tier One — Best Management Practices (BMPs) recommendations, was submitted to Gaston
County Landfill.
If you have any further questions concerning these matters, please call me at [phone].
Sincerely,
�3uxton v onmental, Inc,
/vRooss Klingman, P.G.
President
cc: Ray Maxwell, PE - Gaston County Public Works

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Energy, Mineral and Land Resources General Permit No. NCG120000
Date submitted Q-140- I5
CERTIFICATE OF COVERAGE NO. NCG12 0 0 'I 2
FACILITY NAME Gaston County Landfill -Hardin Site
COUNTY Gaston
PERSON COLLECTING SAMPLES Ross Klingman, P.G. with Buxton Env., Inc.
LABORATORY Shealy Environmental Serv., Inc. Lab Cert. a 329
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑■ Jan -June ❑ July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW [-]Trout ❑PNA
❑Zero -flow ❑Water Supply []SA
OOther wS-Iv
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
❑ No discharge this period'
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
LLO-1
06/12/2019
0.6
29
2650 H
13
6.9 / 7.3'
LLO-2
06/12/2019
0.6
54
'>143000 H
3000
7.0 / 7.4'
ULO-1
06/12/2019
0.6
<20
` 2000 H
25
7.5 / 7.B'
YW-1
06/12/2019
0.6
260
.>60000 H
- 43
6.7 / 6.8`
' = lab tested
' 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.
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.
❑ No discharge this periodz
Outfall No.
Date Sample Collected'
(ma/dd/yr)
24-hour rainfall amount,
Inches'
Non -Polar Oil & Grease
mg/L
Total Suspended Solids,
mg/L
New Motor or Hydraulic Oil Usage,
gal/mon
Benchmarks
_
-
15
100 or 504
Parameter Code
-
46529
00SS2
C0530
NCOIL
MG-1
06/12/2019
0.6
8.4
3000 @ LLO-2
Historically>55 gal.mon
MG-1 2250' upgradient LLO-2
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 ❑ NO 0
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME:
Mail an oriainal cony of this DMR, including all "No Discharge" reports, within 30 days of receipt of the lab results (or at end of monitorinq 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 aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
Permittee
1 Date
(Permit Date: 11/1/2018-5/31/2021 SWU-248, last revised 11/1/2018
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