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SAMPLING PROTOCOL FOR ROUTINE PIPING/DISPENSER REMOVAL/REPLACEMENT <br /> The following represents minimum sampling criterion required for closure compliance . Soil samples collected shall be <br /> representative of native soils beneath the tank' s invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. Samples <br /> cannot be combined into a composite sample for analysis in the field or the lab. Each sample must have a set of <br /> corresponding analytical results . If contamination is documented during closure , an Unauthorized Release Notification must be <br /> completed and submitted within five (5) working days pursuant to California Health & Safety Code , Section 25295 . <br /> DISPENSER PIPING AND STOCKPILE SAMPLES <br /> DISPENSER SAMPLES 1 Sample beneath each dispenser <br /> F17 <br /> PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br /> DISPENSER & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> TABLE #2 RECOMMENDED MINIMUM VERIFICATION ANALYSES <br /> FOR UNDERGROUND STORAGE TANK INVESTIGATIONS <br /> TANK Gasoline Diesel BTEX VOCs('I Semi - oil & PCB Total Title 22 <br /> TANK CONTENTS VOCs(2) Grease Lead Metals (3) <br /> 8015M 8021B 8260B 8082 7421 <br /> 82608 8015M 8260B 8270C 1664A <br /> Unknown FuelX X X X <br /> (C4-C36) <br /> Gasoline X X X <br /> (C4-C20) <br /> TTE <br /> Diesel X X X <br /> (C10—C36) <br /> Jet Fuel/Kerosene X X <br /> (C9-C20) <br /> Heating Oil X X <br /> (C10-C32) <br /> Stoddard Solvent <br /> (non-chlorinated) X X <br /> C8-C20 <br /> Chlorinated X X <br /> Solvents <br /> Waste Oil or X X X X X X X <br /> i <br /> Unknown Contents <br />[1 <br /> i <br /> Notes : <br /> 1 . EPA Method 82608 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) , tertiary-butanol (TBA) , methanol and ethanol and fuel additives 1 , 24chloroethane ( 1 , 2-DCA) <br /> and ethylene dibromide ( EDB or 1 , 24bromoethane) . <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 8081A. <br /> 3 . Title 22 Metals : Method 6010B may be used for all but the following metals , for which individual AA methods <br /> are required : Antimony & Arsenic by 7062 , Cadmium by 7131A , Lead by 7421 , Mercury by 7471A , 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 />