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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(2) Grease Lead Metals (3) <br /> 8015M 8021B 8260B 8082 7421 <br /> 8260B 8015M 8260B 8270C 1664A <br /> Unknown Fuel X X X X <br /> (C4-C36) <br /> Gasoline X X X <br /> (C4-C20) <br /> Diesel X X X <br /> (Cl ()—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 /> Unknown Contents <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 (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- 11A6) 5 <br /> i <br />