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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 /> 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 TANK Gasoline Diesel BTEX VOCsM Semi= oil & PCB Total Title 22 <br /> # CONTENTS VOCs Grease Lead Metals(3) <br /> 8015M 80218 <br /> 82608 8015M 82606 82608 <br /> 8270C 1664A 8082 7421 <br /> Unknown Fuel <br /> (C4-C36) X X X X <br /> Gasoline <br /> (C4-C20) X X X <br /> Diesel <br /> (C10—C36) X X X <br /> Jet Fuel/Kerosene <br /> (C9-C20) X X <br /> Heating Oil <br /> (C10-C32) X X <br /> Stoddard Solvent <br /> (non-chlorinated) X X <br /> C8-C20 <br /> Chlorinated <br /> Solvents X X <br /> Waste Oil or <br /> Unknown Contents X X X X X X X <br /> Notes : <br /> 1 . EPA Method 8260B analyses must include all analytes listed in the method plus fuel oxygenates methyl- <br /> tertiary-butyl ether ( MTBE ) , diisopropyl ether ( DIPS ) , 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 7-26-2016) 5 <br />