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�3 <br /> W <br /> t� <br /> 2.5 Estimates of liquid quantity and composition leaked: <br /> .� No estimate of liquid quantity released, <br /> with existing information. if any, can be made <br /> 2.6 Topography, geology, surface water, depth to groundwater: <br /> ua The project site is located within the Eastern San Joaquin <br /> County Groundwater Basin. The basin is drained by the uin <br /> Joaquin River and its tributaries, <br /> Merman Slough. Recharge Occurs along <br /> ► the San Joaquin River Additional <br /> Sacramentoe RiverDelta <br /> occurs in <br /> Stockton. The geology of the Stockton site is composedrth of <br /> thick sequence of river channel and flood of a <br /> These sequences contain interbedded sand Alain deposits. <br /> clay layers. gravel, silt and <br /> Depth to groundwater beneath the site is a <br /> feet below grade (San Joaquin Flood Control and Water <br /> �y# approximately 110 <br /> Conservation District, 1989). Groundwater flow is to the <br /> west-southwest. <br /> _ s <br /> 2.7 Proximity of private, municipal and irrigation g tion wells: <br /> The closest water well to the site is located approximate] <br /> 180 feet east of fn •1' <br /> sl the 10,000 gallon diesel tank r <br /> �.� PPly well, operated by the Linden Water District, is an <br /> open bottom completion at 448 feet, Static depthThis water <br /> ,t1 has been recorded at 128 to 135 feet below to water <br /> `jr{ addition, three domestic '��ells and nn® irri In <br /> located :between .600 and':900 feet to the' narthtrsorthwel are . <br /> the�site. north/northwest of <br /> �.� 2.8 Proposed A sed sampling locations and methodology: <br /> To assess the <br /> u/g diesel storage <br /> contribution of the 10 0 <br /> tank to soil contamination at the 0 gallon <br /> site. Water;Vork proposes to drill three angle soil borings <br /> beneath this ngs <br /> F .tank and collect soil samples. A workplan for <br /> the investigation is presented below. <br /> 2.8.1 The three sail borings will be drill e <br /> vertical and advanced 18 .feet (15- feet belao angle to <br /> determine the grade) to <br /> Presence of soil contamination beneath the <br /> center of the diesel tank. The <br /> are shown on Figure proposed boring locations <br /> g e 2. A sail sample will be <br /> Collectedatthe bottom of each boring (le 15 <br /> f' the tank). feet below the center <br /> Drilling will be <br /> conduc <br /> C57 license 446670 singdabhollow <br /> Drill Cuttings stem sterbergasugert drill order <br /> characterization of soil to logged continuous) for <br /> ig. <br /> { Classification System. ype utilizing the Unified Soil <br /> Obvious soil discoloration and <br /> 2 <br /> ��41 <br />