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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 <br />TANK <br />Gasoline <br />Diesel <br />BTEX <br />V0Cs0) <br />Semi- <br />Oil & <br />PCB <br />Total <br />Title 22 <br /># <br />CONTENTS <br />VOCs(2) <br />Grease <br />Lead <br />Metals (3) <br />8015M <br />8021B <br />82608 <br />8082 <br />7421 <br />8260B <br />8015M <br />82608 <br />8270C <br />1664A <br />Unknown Fuel <br />(C4 -C36) <br />X <br />X <br />X <br />X <br />Gasoline <br />(C4 -C20) <br />X <br />X <br />X <br />Diesel <br />(C10—C36) <br />X <br />X <br />X <br />Jet Fuel/Kerosene <br />(C9 -C20) <br />X <br />X <br />Heating Oil <br />(C10 -C32) <br />X <br />X <br />Stoddard Solvent <br />(non -chlorinated) <br />X <br />X <br />h <br />(C8 -C20 <br />Chlorinated <br />l; <br />Solvents <br />X <br />X <br />c <br />; <br />Waste Oil or <br />Unknown Contents <br />X <br />X <br />X <br />X <br />X <br />X <br />^ % <br />Al <br />Z <br />Notes: <br />1. EPA Method 8260B analyses must include all analytes listed in the method plus fuel oxyg e§ methyl- Z <br />tertiary -butyl ether (MTBE), diisopropyl ether (DIPE), ethyl -tertiary -butyl ether (EtBl terti yl -methyl O <br />ether (TAME), tertiary -butanol (TBA), methanol and ethanol and fuel additives 1,2-dichlordAMne (1,2 -DCA f <br />and ethylene dibromide (EDB or 1,2-dibromoethane). <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 maybe 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 />