Laserfiche WebLink
effluent limitations may be detected in the effluent of some of the treatment systems, <br /> however. These pollutants include both organic and inorganic compounds. The purpose of <br /> these provisions is to require Dischargers to do additional activities should any pollutants <br /> exceed the triggers in Table F-8. These triggers are not effluent limitations,and must not be <br /> construed as such. Instead, they are levels at which additional investigation is warranted to <br /> determine whether a numeric limit for a particular constituent is necessary. Unless explained <br /> in a note,the concentration-based triggers in Table F-8 are set at the minimum applicable <br /> criterion, as determined from State MCLs, federal MCLs, CTR criteria, or Basin Plan <br /> WQOs. The reason for this approach is explained in section IV of this Fact Sheet, and <br /> further explained below. <br /> a. Triggers for Inorganic Compounds. Antimony, arsenic,beryllium, cadmium, <br /> chromium, copper, lead,mercury,nickel, selenium, silver, thallium,and zinc (hereinafter <br /> called inorganic compounds) are present in fuel-or VOC-cleanup discharges,primarily <br /> due to background concentrations in the shallow groundwater being remediated. The <br /> discharge volume and concentrations of inorganic compounds concentrations in the <br /> effluent are relatively low. The Regional Water Board has concluded that Bay-wide <br /> inorganic compounds loading from fuel- or VOGcleanup discharges represent a very <br /> small portion of total inorganic compounds loadings from sources within the Region <br /> (including municipal and industrial point source discharges and stormwater discharges), <br /> and, therefore, shall cause no impairment of beneficial uses or potential exceedances of <br /> inorganic compounds objectives in receiving waters. <br /> Facilities where inorganic compounds have adversely impacted groundwater are not <br /> eligible for coverage under this Order. Each Discharger shall submit, as part of the NOI <br /> application for proposed discharge, analytical results including inorganic compounds <br /> concentrations in the influent and effluent, if available, or maximum concentrations in <br /> any individual extraction wells, if not operating yet. Based on these data,the Discharger <br /> may receive a discharge authorization letter. In some cases after starting up an extraction <br /> and treatment system, the effluent concentration of some inorganic compounds may <br /> exceed the triggers listed in Table F-8. In this case, the Discharger shall take three <br /> additional samples and have them analyzed for the inorganic compound of concern and <br /> comply with the Provisions VI.C.7, VI.C.8, or VI.C.9. <br /> Triggers for copper and nickel have been updated in the General Pertnit from the <br /> previous Fuel General Pernut to reflect the recently adopted SSOs and SSTs for copper <br /> throughout San Francisco Bay, and the SSOs and SSTs for nickel in the South Bay. <br /> b. Triggers for Organic Compounds. Dischargers authorized under this Order are <br /> expected to use BAT and treat their VOC pollutants to non-detectable levels. Sites where <br /> pesticides or other conservative pollutants have adversely impacted groundwater are not <br /> eligible for coverage under this Order. Each Discharger shall submit, as part of the NOI <br /> application for proposed discharge, analytical results including volatile and semi-volatile <br /> organic compounds concentrations in the influent and effluent if available or maximum <br /> concentrations in any individual extraction wells, if not operating yet. In addition, each <br /> Discharger shall submit a report,to the satisfaction of Executive Officer, certifying the <br /> Attachment F—Fact Sheet F-29 <br /> For VOC and Fuel General NPDES Permit No.CAG912002 <br />