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DocuSign Envelope ID:2F173BE3-D39C-47D3-A993-65B9F76377E9 <br /> SAN1 U A Q U I N Environmental Health Department <br /> —COU NTY- <br /> AMPLING PROTOCOL FOR ROUTINE PIPING/DISPENSER REMOVAL/REPLACEMENT <br /> e following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be <br /> rep sentative of native soils beneath the tank's invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. <br /> Sam es cannot be combined into a composite sample for analysis in the field or the lab. Each sample must <br /> have a et of corresponding analytical results. If contamination is documented during closure, an Unauthorized <br /> Release otification must be completed and submitted within five (5) working days pursuant to California Health & <br /> Safety Co Section 25295. <br /> DISPENSER PIPING AND STOCKPILE SAMPLES <br /> DISP NSER SAMPLES 1 Sample beneath each dispenser <br /> PIPING S L SAMPLES 1 Sample every 20 lineal feet <br /> DISPENSER& IPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> TABLE #2 RECO MENDED MINIMUM VERIFICATION ANALYSES <br /> FOR UNDERGR UND STORAGE TANK INVESTIGATIONS <br /> TANK TANK Gasoline Diese BTEX VOCO) Semi- Oil& PCB Total Title 22 <br /> # CONTENTS VOCs(2) Grease Lead Metals(3) <br /> 8015M \8B <br /> 82606 8082 7421 <br /> 8260B 8015M <br /> 8270C 1664A <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 <br /> Notes: <br /> 1. EPA Method 8260B analyses must include all analytes listed in the method plus fuel oxygenates m\beary-butyl ether <br /> (MTBE),diisopropyl ether(DIPE),ethyl-tertiary-butyl ether(EtBE),tertiary-amyl-methyl ether(TAM -butanol <br /> (TBA),methanol and ethanol and fuel additives 1,2-dichloroethane(1,2-DCA)and ethylene dibromr 1,2- <br /> dibromoethane). <br /> 2. If pentachlorophenol(PCP)is identified,analyze the soil and/or water sample for dioxins and furanMeth' 8290 <br /> and pesticides by EPA Method 8081 A. <br /> 3. Title 22 Metals:Method 6010B may be used for all but the following metals,for which individual AAare require .Antimony&Arsenic by 7062,Cadmium by 7131 A, Lead by 7421, Mercury by 7471 A, Nickel by 752m by 7742,aThallium by 7841. <br /> 4. Non-proprietary, performance based analytical methods may be used with approval of Regional Bo <br /> 5 of 6 <br />