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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. 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 STOCKPILE SAMPLES <br />Tri -Regional <br />Appendix< <br />TABLE #2 RECOMMENDED VERIFICATION AN <br />FOR UNDERGROUND STORAGE <br />Tank <br />DISPENSER SAMPLES <br />1 Sample beneath each dispenser <br />BTEX VOCs <br />PIPING SOIL SAMPLES <br />1 Sample every 20 lineal feet <br />DISPENSER & PIPING STOCKPILE SAMPLES <br />2 Samples every 50 cubic yards <br />Tri -Regional <br />Appendix< <br />TABLE #2 RECOMMENDED VERIFICATION AN <br />FOR UNDERGROUND STORAGE <br />Tank <br />BTEX VOCs <br />Seml- <br />Title <br />Samples Contents <br />Gasoline <br />Diesel <br />by by <br />VOCs <br />O' & <br />PCBs <br />Total <br />22 <br />Required (Carbo; <br />by 8015M <br />by <br />80218 82or <br />by <br />ase <br />by <br />Lead by <br />Metals <br />or 82608 <br />8015M <br />(60B <br />8 (7700 <br />y 1684A <br />8082 <br />7421 <br />Range) <br />8260B <br />I II "" I X II X II II X II / II II II X I II <br />p H Gasoline (c4 -c20) I X H II 1 W N II II II X H II <br />(C6 C20) 4crd1 I I X I� II X <br />Notes: <br />1. EPA Meth 260B analyses must include all analytes listed in the method plus fuel oxygenates methyl -tertiary -butyl ether <br />(MTBE), ' sopropyl ether (DIPE), ethyl -tertiary -butyl ether (EtBE), tertiary -amyl -methyl ether (TAME), tertiary -butanol (TBA), <br />urethan and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) and ethylene dibromide (EDB or 1,2-dibromoethane). <br />2. If p tachlorophenol (PCP) is identified, analyze the soil and/or water sample for dioxins and furans by EPA Method 8290 <br />a pesticides by EPA Method 8081A. <br />3. Method 6010B may be used for all the following metals, for which individual AA methods are required: Antimony & Arsenic <br />by 7062, Cadmium by 7131A, Lead by 7421, Mercury by 7471A, Nickel by 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 />Revised 8/8/06 <br />3 <br />it-? -. . •��I_�t�__-_-_ <br />(C6 C20) 4crd1 I I X I� II X <br />Notes: <br />1. EPA Meth 260B analyses must include all analytes listed in the method plus fuel oxygenates methyl -tertiary -butyl ether <br />(MTBE), ' sopropyl ether (DIPE), ethyl -tertiary -butyl ether (EtBE), tertiary -amyl -methyl ether (TAME), tertiary -butanol (TBA), <br />urethan and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) and ethylene dibromide (EDB or 1,2-dibromoethane). <br />2. If p tachlorophenol (PCP) is identified, analyze the soil and/or water sample for dioxins and furans by EPA Method 8290 <br />a pesticides by EPA Method 8081A. <br />3. Method 6010B may be used for all the following metals, for which individual AA methods are required: Antimony & Arsenic <br />by 7062, Cadmium by 7131A, Lead by 7421, Mercury by 7471A, Nickel by 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 />Revised 8/8/06 <br />3 <br />