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i x1 <br />AN 05 2018 <br />--• t t s- -• - - s - - - •- '.�a ra <br />The following represents minimum sampling criterion required for closure compliance. Soil samples 406110 b i <br />representative of native soils beneath the tank's invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. mples <br />cannot be combined into a composite sample for analysis in the field or the lab. Each sample must ha a set of <br />corresponding analytical results. If contamination is documented during closure, an Unauthorized Release Notifi tion must be <br />completed and submitted within five (5) working days pursuant to California Health & Safety Code, Section 25295 <br />TABLE #2 RECOMMENDED MINIMUM VERIFICATION ANALYSES <br />FOR UNDERGROUND <br />DISPENSER SAMPLES 1 Sample beneath each ' penser <br />PIPING SOIL SAMPLES 1 Sample every 20 ineal feet <br />TANK TANK Gasoline <br />DISPENSER & PIPING STOCKPILE SAMPLES 2 Samples ev ry 50 cubic yards <br />TABLE #2 RECOMMENDED MINIMUM VERIFICATION ANALYSES <br />FOR UNDERGROUND <br />STORAGE <br />TANK INVESTIGATIONS <br />TANK TANK Gasoline <br />Diesel BTEX <br />VOCsIlISemi- <br />Oil & PCB Total Title 22 <br /># CONTENTS <br />V® cst�1 Grease Lead Metals(3) <br />8021B <br />8260 <br />8082 7421 <br />82608 <br />8015M 8260B <br />8270C 1664A <br />Unknown Fuel <br />X <br />X <br />X <br />X <br />(C4 -C36) <br />Gasoline <br />X <br />X <br />X <br />(C4 -C20) <br />Diesel <br />X <br />X <br />(C10—C36) <br />Jet Fuel/Kerosene <br />(C9 -C20) <br />X <br />X <br />Heating Oil <br />(C10 -C32) <br />X <br />X <br />Stoddard Solvent <br />(non -chlorinated) <br />X <br />X <br />C8 -C20 <br />Chlorinated <br />Solvents <br />X <br />X <br />Waste Oil or <br />X <br />X <br />X <br />X <br />X <br />X <br />X <br />Unknown Contents <br />Notes: <br />1. EPA Method 8260 analyses must include all analytes listed in the method plus fuel oxygenates methyl - <br />tertiary -butyl ether MTBE), diisopropyl ether (DIPE), ethyl -tertiary -butyl ether (EtBE), tertiary -amyl -methyl <br />ether (TAME), to iary-butanol (TBA), methanol and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) <br />and ethylene di romide (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 <br />Method 8290 and pesticides by EPA Method 8081 A. <br />3. Title 22 Metals: Method 6010B maybe used for all but the following metals, for which individual AA methods <br />are required: Antimony & Arsenic by 7062, Cadmium by 7131 A, Lead by 7421, Mercury by 7471 A, Nickel by <br />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 />EH230038 (revised 12-11-15) 5 <br />