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SUBSURFACE SOIL AND GROUNDWATER ASSESSMENT REPORT <br /> TABLE 3 <br /> SOIL AND GROUNDWATER LABORATORY ANALYTICAL RESULTS <br /> Sample MTBE,DIPE,TAME, TBA/Ethanol/ <br /> Identification Total Lead TPHg/BTEX ETRE,EDB, 1-2 DCA Methanol <br /> Soil ox in milligrams per kilogram (mg/kg) <br /> S-14-TPiA 77 <br /> S-14-TP4A 88 <br /> S-14-TP5A 59 <br /> S-I4-TP10 67 -- <br /> S-14-TP 14 60 <br /> S-14-TP 15 7 8 <br /> ' Water in micrograms per liter(pg/L) <br /> W-30-TP9 -- -- <1 0 <5 0/<50/<200 <br /> W-25-TP10 -- -- <1 0 <5 0/<50/<200 <br /> W-35-TPIO -- <501<05 <1 0 <5 0/<50/<200 <br /> W-25-TP12 -- -- <1 0 <5 0/<50/<200 <br /> ' W-30-TP 13 -- -- <10 <5 0 I<50/<200 <br /> W-25-TP14 -- -- <10 <5 0/<50/<200 <br /> W-25-TP 15 -- <50/<0 5 <1 0 <5 0/<50/<200 <br /> W-25-TP16 <1 0 <5 0/<50/<200 <br /> W-35-TP16 -- <10 <5 0/<50/<200 <br /> W-25-TP 17 <50/<0 5 <10 <5 0/<50/<200 <br /> W-25-TP 18 <10 <5 0/<50/<200 <br /> W-25-TP19 _- -- <1 0 <5 0/<50/<200 <br /> --=Not analyzed <br /> <0 5 =Concentration less than reported laboratory detection limit <br /> i <br /> ' TOPOGRAPHIC AND HYDROGEOLOGIC CONDITIONS <br /> As related tasks in our two groundwater assessments, ESA reviewed available regional <br /> groundwater data to determine location of nearby groundwater wells and estimate the regional <br /> groundwater flow direction This information is summanzed below <br /> The USGS Stockton West, California 7 5 minute quadrangle, edition of 1968, indicates the site is <br /> relatively level with an elevation of approximately 8 to 9 feet above mean sea level (amsl) The <br /> ' surface gradient as shown on the topographic map appears to be in a northeasterly direction No <br /> watercourses or lakes are depicted on or immediately adjacent to the site The Calaveras River is <br /> located approximately 1,800 feet north of the site <br /> Additional Groundwater Assessment Report 1 1 ESA/200252 <br /> March 26 2001 <br />