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Coca-Cola Enterprises - West <br /> job No. 90054 <br /> reported as non-detectable in groundwater monitoring wells MW-2, 3, 4, and 5. A TPH <br /> -- concentration of 46 ppb was reported in groundwater monitoring well MW-1. Samples analyzed <br /> for TPH as diesel indicated concentrations of 220 ppb, 200 ppb, 170 ppb and 170 ppb, in <br /> groundwater monitoring wells MW-1, 2, 4 and 5, respectively. TPH as diesel was^found to be <br /> present in well MW-3.' ROT <br /> i <br /> w PNAs were not detected in the groundwater from wells MW-1 through 5. Very low lead <br /> concentrations were reported in wells MWA, 2, and 3 A concentrations of 0.1I ppm,,0.039 <br /> ' ppm, and 0.0075'ppm,respectively: <br /> .�. PP PP PP ,.p ,. Y . MW-1,. 2,.and'3 with T <br /> BTEC concentrations were:detected in the groundwater from: wells <br /> -„ concentrations of 1.5 b, 0.94 band. 6 b, res ectivel . . BTEX concentrations were not <br /> detected in the grounlwate° from staring wells MW4 and MW-5. <br /> W d.0 SUBSURFACE CONDITIONS <br /> -; 6.1 REGIONA, GEOLbGYAIYDROGEOLOGY <br /> The site lies on the flat alluvial plain of the San Joacruir. Valley. This large northwest-southeast <br /> trending valley is a sedimentary basin containing several thousand feet of late Tertiary and <br /> Quaternary sediments and is part of what is called the Great Valley: The basin is bordered by <br /> the Franciscan age rocks of the Coastal Ranges and the Sierra Nevada Range on the west and <br /> east, respectively. The primary geologica! component.of the Sierra Nevada Range is granite. <br /> Between the Coastal Ranges and the Tertiary and Quaternary sediments on the :vest side of the. j <br /> valley are the folded Great Dalley Sequence comprised mainly of Cretaceous age sandsrones. <br /> The Southern Sierra Nevada Range hooks westward to border the southern extremity of the <br /> Great Valley and the Klamath Mountains provide the northern boundary. The Klarnath <br /> Mountains are thought to have been part of the Sierra Nevada Range in h?esozoic time and <br /> later separated through orogenic and plate tectonic forces. <br /> f <br /> _—_The-Great_Valley-,was-originally-an-oceanic-trough_zone—Even though thick-sediments_now _ �_ — <br /> 14 <br />