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The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be <br />representative of native soils beneath the tanks invert (tank°s bottom) at a collection depth not to exceed 2 - 4 feet. If <br />contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted within five (5) <br />working days pursuant to California Health & Safety Code, Section 25295. <br />1101 • r ., <br />Tri -Regional•. . <br />Appendix <br />TABLERECOMMENDED VERIFICATION• r - s; r STORAGE TANK INVESTIGATIONS <br />DISPENSER SAMPLES <br />1 Sample beneath each dispenser <br />PIPING SOIL SAMPLES <br />1 Sample every 20 lineal feet <br />Semi- <br />DISPENSER & PIPING STOCKPILE SAMPLES <br />2 Samples every 50 cubic yards <br />Tri -Regional•. . <br />Appendix <br />TABLERECOMMENDED VERIFICATION• r - s; r STORAGE TANK INVESTIGATIONS <br />Notes: <br />1. EPA Method 82608 analyses must include all analytes listed in the method plus fuel oxygenates methyl -tertiary -butyl ether <br />(MTBE), diisopropyl ether (DIPS), ethyl -tertiary -butyl ether (EtBE), tertiary -amyl -methyl ether (TAME), tertiary -butanol (TBA), <br />methanol and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) and ethylene dibromide (EDB or 1,2-dibromoethane). <br />2. If pentachlorophenol (PCP) is identified, analyze the soil and/or water sample for dioxins and furans by EPA Method 8290 <br />and pesticides by EPA Method 8081A. <br />3. Method 6010B may be used for all the following metals, for which individual AA methods are required: Antimony & Arsenic <br />by 7062, Cadmium by 7131A, Lead by 7421, Mercury by 7471A, Nickel by 7521, Selenium by 7742, and Thallium by 7841. <br />4. Non-proprietary, performance based analytical methods may be used with approval of Regional Board staff. <br />Revised 8/8/06 <br />3 <br />Tank <br />BTEX <br />VOCs <br />Semi- <br />Title <br />Samples <br />Contents <br />Gasoline <br />Diesel <br />by <br />by <br />VOCs <br />OilB <br />PCBs <br />Total <br />22 <br />Required <br />(Carbon <br />by 8015M <br />by <br />80218 <br />82608 <br />by <br />Grease <br />by <br />Lead by <br />Metals <br />or 82606 <br />8015M <br />or <br />(1) <br />8270C <br />by 1664A <br />8082 <br />7421 <br />(3) <br />Range)82608 <br />Unknown Fuel <br />X <br />X <br />X <br />X <br />C4 -C36 <br />Gasoline (C4 C20)FX <br />X <br />X <br />Diesel (C10 -C36) <br />X <br />X <br />X <br />Jet Fuel/Kerosene <br />X <br />X <br />C9 -C20 <br />Heating Oil (C10- <br />X <br />C32 <br />Stoddard Solvent <br />(C8 -C20) <br />FX <br />X <br />Non - Chlorinated <br />Chlorinated <br />Solvents <br />E= <br />11 <br />X <br />X <br />Waste Oil or <br />X <br />X <br />�� <br />X <br />Unknown Contents <br />Notes: <br />1. EPA Method 82608 analyses must include all analytes listed in the method plus fuel oxygenates methyl -tertiary -butyl ether <br />(MTBE), diisopropyl ether (DIPS), ethyl -tertiary -butyl ether (EtBE), tertiary -amyl -methyl ether (TAME), tertiary -butanol (TBA), <br />methanol and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) and ethylene dibromide (EDB or 1,2-dibromoethane). <br />2. If pentachlorophenol (PCP) is identified, analyze the soil and/or water sample for dioxins and furans by EPA Method 8290 <br />and pesticides by EPA Method 8081A. <br />3. Method 6010B may be used for all the following metals, for which individual AA methods are required: Antimony & Arsenic <br />by 7062, Cadmium by 7131A, Lead by 7421, Mercury by 7471A, Nickel by 7521, Selenium by 7742, and Thallium by 7841. <br />4. Non-proprietary, performance based analytical methods may be used with approval of Regional Board staff. <br />Revised 8/8/06 <br />3 <br />