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El <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. 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 />Tri -Regional Recommendations <br />Appendix A <br />TABLE #2 RECOMMENDED MINIMUM VERIFICATION ANALYSES <br />FOR UNDERGROUND STORAGE TANK INVESTIGATIONS <br />DISPENSER SAMPLES <br />1 Sample beneath each dispenser <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 Recommendations <br />Appendix A <br />TABLE #2 RECOMMENDED MINIMUM VERIFICATION ANALYSES <br />FOR UNDERGROUND STORAGE TANK INVESTIGATIONS <br />Notes: <br />1. EPA Method 82608 analyses must include all analytes listed in the method plus fuel oxygenates methyl -tertiary -butyl ether <br />(MTBE), diisopropyl ether (DIPE), ethyl-terbary-butyl ether (EtBE), tertiary -amyl -methyl ether (TAME), tertiary -butanol (TBA), <br />methanol and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) 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 Method 8290 <br />and pesticides by EPA Method 8081A. <br />3. Method 60108 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 />Samples <br />TankSemi- <br />Contents <br />Gasoline <br />Diesel <br />BTEX <br />by <br />VOCs <br />by <br />VOCs <br />Oil & <br />PCBs <br />Total <br />Title <br />22 <br />Required <br />(Carbon <br />by 8015M <br />or 82608 <br />by <br />8015M <br />80218 <br />82606 <br />by <br />8270C <br />Grease <br />by 1664A <br />by <br />8082 <br />Lead by <br />7421 <br />Metals <br />Range) <br />or <br />8260B <br />(1) <br />(2) <br />(3) <br />UnknownC4-C36ueI. <br />X� <br />r y�.. d <br />i"�^q yy$( �§ <br />+ L�:r% <br />at9nhr:. <br />w' oL��is^ <br />Tm.£'" =x i <br />�„ <br />m?u�' <br />.a'q w�� 'a <br />-✓«&'M t'e" "� <br />v c,. <br />i <br />Gasoline (C4 -C20) <br />1 <br />F I <br />1 <br />17--]®� <br />t %ff` <br />`4 <br />4PELt <br />- z <br />HIM <br />u <br />�"�v' i'F <br />.o -v5'.. 3, ., <br />,�y�� <br />`g"� <br />T,at'ti+c�. <br />Diesel (C10 -C36) <br />X <br />Jet Fuel/KeroseneX <br />C9 -C20 <br />Heating Oil (C10- 32) I� <br />X <br />X <br />Stoddard Solvent <br />(C8 -c20) <br />Oa <br />X <br />❑�❑�❑ <br />Non - Chlonnated <br />7,77, 37 7 <br />Chlorinated <br />.��0����� <br />RNER <br />Waste il or <br />X <br />X <br />OOO�� <br />Unknown Contents <br />Notes: <br />1. EPA Method 82608 analyses must include all analytes listed in the method plus fuel oxygenates methyl -tertiary -butyl ether <br />(MTBE), diisopropyl ether (DIPE), ethyl-terbary-butyl ether (EtBE), tertiary -amyl -methyl ether (TAME), tertiary -butanol (TBA), <br />methanol and ethanol and fuel additives 1,2-dichloroethane (1,2 -DCA) 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 Method 8290 <br />and pesticides by EPA Method 8081A. <br />3. Method 60108 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 />