NCG120038_Representative Outfall Status Approval_20091112

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NCDENR
North Carolina Department of Environment aI-A Nocturnal Reclsources
Division of IA/ater Quality
S'everjv tcves PerdLie Coleen H. Su11;1ns
Governor
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November 12, 2009
Davidson County Integrated Solid Waste Management
c/o Mr. Charles Brushwood
1242 Old US Hwy 29/70
Thomasville, NC 27360
Re: Request for Representative Outfall Status and
Tiered Response Requirements
Davidson County Solid Waste Facility
NPDES Permit #NCG120038
Davidson County
Dear Mr. Brushwood:
Dee Freernai7
Secretary
The Winston-Salem Regional Office (WSRO) staff has reviewed your request that 5 of 9 stormwater
discharge outfalls (SDOs) being monitored in accordance with permit #NCG120038, be given
representative outfall status. Based on the information and maps provided, as well as a site visit by
Jenifer Carter and myself on October 28, 2009, we are approving your request, with one modification. In
accordance with 40 CFR §122.21 (g)(7), you are authorized to sample outfalls Phase 2 SB 3 (as opposed
to Phase 2 SB 1, as requested), Phase 2 SB 4, Phase 1 SB 2, Phase 1 SB 4 and C&D SB 9. These outfalls
will represent the other outfalls as follows:
Outfall to be Monitored*
Representative of:
Phase 2 SB 3
Phase 2 SB 1
Phase 2 SB 4
Phase 2 SB 2
Phase 1 SB 2
Phase 1 SB 1 and Phase 1 SB 3
Phase 1 SB 4
C&DSB9
*Due to the formal closure of Holly Grove Landfill, monitoring of outfall HG SB 1 is no longer required
to meet the Qualitative or Analytical monitoring requirements of the permit
This approval is effective immediately. Please note that representative outfall status applies only to
the Analytical Monitoring requirements of the permit; therefore, Qualitative Monitorinp, will still
need to be performed at all nine (9) remaining SDOs.
In addition, WSRO has reviewed the analytical data you submitted in response to permit requirements for
benchmark exceedences and tiered response levels. At this time, the Division concurs that more frequent
monitoring for fecal coliform at this site would be ineffective. You must continue to monitor for Fecal
Coliform semi-annually as required by the permit in Section B Analytical Monitoring Requirements, but
you will not be required to move up to the more frequent monitoring required in the Tiered Responses.
The tiered response requirements still apply to Total Suspended Solids (TSS) and COD.
Noilh Carolina Division of'Alater Qualify, VVinston-Salem, Regional Office
Location: 585 7Vaught0An St. Vklinston-Salem, Noith Carolina 27 107
Phone: 336-77'i-5000 `; FAX: ' 36-7?i-46301 customer Service: 1-877-623-6/ 48
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Please append this letter to your Stormwater Pollution Prevention Plan (SPPP) or permit in order to
document that representative outfall status has been approved, and that a Tiered Response to benchmark
exceedences is no longer required for Fecal Coliform exceedences. If changes in drainage areas, BMPs,
structures, processes, storage practices, or other activities occur that significantly alter the basis of this
approval, representative outfall status many no longer be valid, or may need to be updated. You should
either resume analytical monitoring of all SDOs, or reapply to this office for representative outfall status
based on updated information.
If you have any questions or comments concerning this letter, please contact Jenifer Carter at (336) 314-
1440.
Sincerely,
Steve W. Tedder
Surface Water Regional Supervisor
Winston-Salem Regional Office
Division of Water Quality
cc: WSRO SAT Files
SWP Central Files
Stormwater Permitting Unit
Ms. Joan A. Smyth, P.G. (Richardson Smith Gardner & Assoc; 14 N. Boylan Ave; Raleigh, NC 27603)