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SAMPLINGI ! <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 (tanks 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 /> DISPENSER PIPING AND STOC_KPILE 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 MINIMUMVERIFICATION LYSES <br /> FOR UNDERGROUND STORAGE TANK INVESTIGATIONS <br /> TANK TANK TPH-G TPH-D BTX& CL HC TOTAL E OXYGENATES METALS PCB <br /> CONTENTS LEADTBE,TBA,DIPS, ICAP/AES 8270 <br /> 8015 8015 8020 8010 8020 ETBE,TAME) or 8080 <br /> 8260 8260 8260 8240 7420 <br /> 8260 7421 8260 1,2 DCA&EDB AA <br /> 8260 <br /> LEADED GAS X X XX <br /> UNL GAS X X Z X <br /> DIESEL <br /> KEROSENE X X <br /> LINK FUEL X X X r X <br /> PROD.OIL X X X <br /> CHLOR. <br /> SOLVENTS X X <br /> NONCHLOR <br /> SOLVENTS X X <br /> WASTE\USED OIL <br /> OR <br /> UNKNOWN X rx X X X X <br /> 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),diisoproyl ether( IPE),a yl-te ary-butyl ether( tBE),to 'ary-amyl-methyl <br /> ether(TAME),tertiary-butanol(TBA),methanol and ethanol and fuel additives 1,2-dichloroethane(1,2-DCA) <br /> and ethylene dibromide(EDB or 1,2-dibromoe ane). <br /> 2. If pentachlorophenol(PCP)is identified,analyze the soil anwater sample for dioxins and furans by EPA <br /> Method 8290 and pesticides by EPA Method 81A. <br /> 3. METALS ICAP or AA Inductively Coupled Plasma Atomic Emission Spectrometry 6010 or Atomic Absorption <br /> Spectrometry 7000. Metals:Cadmium,Chromium III and V11, Lead,Zinc and Nickel. <br /> 4. Non-proprietary,performance based analytical methods may be used with approval of Regional Board staff. <br /> Revised 12/31/07 <br /> 3 <br />