Steve McLaughlin, PE Virginia Beach Public Works October 2012.
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Transcript of Steve McLaughlin, PE Virginia Beach Public Works October 2012.
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Steve McLaughlin, PEVirginia Beach Public Works
October 2012
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Location of Lynnhaven Watershed
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State and Federal Regulatory Action
Lynnhaven Bay, Broad and Linkhorn Bay Watersheds Total Maximum Daily Load (TMDL) Report for Shellfish Areas Listed Due to Bacteria Contamination
Final Report March 2004EPA Approval August 2004State Water Control Board December
2004
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Type I Marine Sanitation Devices discharge at no more than 1,000 Fecal Coliform colonies per 100 ml with no visible floating solids
Type II Marine Sanitation Devices discharge at no more than 200 Fecal Coliform colonies per 100 ml and no more than 150 mg/l suspended solids
No Discharge Zone prohibits these discharges
Levels of Sewerage TreatmentLevels of Sewerage Treatment
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By reference, the shellfish standard for Fecal Coliform is 14 per 100 ml.
The swimmable/fishable standard was Fecal Coliforms at 200 per 100 ml; is now enterococcus at 104 per 100 ml
Virginia Department of Health Requirements
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POLLUTANT LEVEL
BODmg/l
CODmg/l
TotalNitrogen
mg/l
TotalPhosphorus
mg/l
FecalColiform#/100ml
Boat Wastewater Average 3,172 11,136 1,662 117 7,500,000
Raw Sewage to Chesapeake-Elizabeth Treatment Plant
242 463 38 5.7 ND
Treated Effluent from Chesapeake – Elizabeth Treatment Plant
1.5 ND 3.1 1.4 4
Ratio Boat Waste to Raw Sewage
13.11 24.05 43.74 20.53 ND
ND – Data not available
BOAT WASTE POLLUTANT CONCENTRATIONS COMPARED TO RAW AND TREATED SEWAGE AT THE CHESAPEAKE ELIZABETH WASTE WATER TREATEMENT PLANT
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Special Acknowledgements
Citizens and City Council of the City of Virginia Beach
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