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len for soil <br /> µ underground fuel. development ofeBaTemedialstiani Aactiondi cplan and to <br /> . provide data necessaryas requested by the S.71HO and the California <br /> —. and groundwater cleanup, <br /> ity Control Board (RWQCB) . <br /> Regional Water Qua' <br /> h taken to achieve this was to: <br /> The initial approac <br /> Drill three soil borings foundthescreening samples former tank site and <br /> t ke <br /> pre-construction, groundwater quality groundwater grab samples f <br /> auger flights at each boring. These $ s as gasoline (TP11- <br /> were analyzed for total petroleum hydrocarbon <br /> G) and for aromatic volatile organics (VOAs)', <br /> ,<4 <br /> was detected in groundwater <br /> If significant contamination <br /> screening samples, the borings would be °beleaPPropriate inch <br /> diameter monitoring wells which may was <br /> groundwater extraction. I£ significant cont borings n onwould not <br /> be <br /> samples' <br /> detected in groundwater screening p wells; <br /> completed as two inch diameter monitoring Y <br /> Take soil samples from each boring <br /> at a minimum o€ five-foot <br /> oring <br /> or Tr <br /> intervals, and analyze two sampleS from VOAs b each EPAbMeth df 8020; by <br /> Modified EPA Method 8015 and for Y , <br /> allow for equilibration, to water level, <br /> measure dep ! <br /> Develop, and sample all monitoring wells <br /> survey top of casing elevations, i <br /> for TPH-G by Modified EPAiMethodua11we11;5 and V0As by EPA Method 602, <br /> upon completion of each sample k <br /> OG analysis lof <br /> nedsntent; <br /> bromideranddorganicwater al <br /> Pl <br /> Based on results of eadsco <br /> selected wells for e y <br /> u even groundwater <br /> Drill, construct, and sample an additional <br /> d °dasand direction of <br /> monitoring wells, based on water quality ta <br /> groundwatnt <br /> er movement as drlocated olaterally frm the rand downgradieof <br /> These additional wells werefurther as <br /> of the sess the extent <br /> first set of wells to <br /> groundwater contamination. <br /> to the extent possible, the limits of soil contamination <br /> Define, This was <br /> • in the area by analyzing selected soilrounding thetsamplest collected from <br /> accomplished y <br /> six of the monitor well borings for TPS directly0 adjacent drilling <br /> olthe <br /> an additional five shallow soil boring Soil borings SB-1, - <br /> tank excavation site (Sthrough 155feet from the edge 5f the <br /> u 2, and -3 were drilleapproximately 3) Soil borings SB-4 and <br /> "inner excavation" (Figure the edge of the inner <br /> drilled approximately 25 feet from was anal zed for <br /> excavation. One soil sample from each boring <br /> Y <br /> TPH-G and VOAs. <br /> 8 <br />