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a <br /> c w + <br /> A <br /> INFORMATION SHEET -2- <br /> GENERAL ORDER FOR DISCHARGE OF <br /> GROUND WATER FROM CLEANUP OF <br /> PETROLEUM FUEL POLLUTION <br /> TO SURFACE WATERS <br /> would occur with an 'average' or 'mean' limit. The 30-Day Median <br /> Concentration for Lead is established at 5 ug/l , one-tenth the MCL for <br /> Lead. <br /> Routine effluent sampling would be conducted monthly. The treatment <br /> technologies utilized for ground water cleanup of fuel constituents are <br /> not normally subject to sudden upset or bypass, so rapid changes in <br /> effluent quality are not expected. If detectable concentrations of fuel <br /> constituents are found, the monitoring program requires weekly monitoring <br /> of the effluent until 'non-detected' conditions are reestablished. The <br /> effluent sampling is not a substitute for process control monitoring by <br /> the Discharger. <br /> b. Daily maximum effluent concentrations are established to allow for some <br /> effluent quality variation and for the false positive analytical results <br /> inherent in analyses near the limits of detection. For Benzene, Ethyl <br /> Benzene, Toluene, and Xylene, the Daily Maximum Effluent Limitation has <br /> been set at ten times the detection limit. For TPH, the Daily Maximum has <br /> been set at the taste and odor threshold of approximately 0.1 mg/1. The <br /> Daily Maximum for lead is set at 50 Egg/l , the primary drinking water <br /> standard for lead. <br /> The flow of wastewater from the ground water treatment systems to be covered by <br /> this Order are generally less than 50 gpm (72,000 gpd). For the purposes of this <br /> Order, discharges less than 100,000 gallons per day will be considered to be low <br /> volume dischargers and will not need characterization for the constituents <br /> contained in Tables 1 and 2 of the Inlands Surface Water Plan. Discharges in <br /> excess of 100,000 gpd will not be covered by this Order. <br /> An NPDES Application Forms (1 and 2D) , a Report of Waste Discharge and filing fee <br /> will be submitted by each proposed Discharger, providing information on the <br /> discharge as detailed in Attachment A. If the Executive Officer finds that the <br /> proposed discharge qualifies for coverage under this General Order, the <br /> Discharger shall be issued a Notification of Applicability statement. <br /> JBM/jbms <br />