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April 3,2001 <br /> Job Number: LGO1-074 <br /> Page 4 <br /> Table 2. <br /> Summary of Available Ground Water Information. <br /> Date,Source Groundwater Notes <br /> Depth <br /> March 9&March 20,2001,two(2) 10-fr soil Unknown. No ground water encountered. <br /> borings,Neil O.Anderson&Associates,Inc. <br /> Water sample from 11492 East Frontage Road, Unknown. Water quality test Nitrate-7.6 mg/L as <br /> Highway 99,Lodi,CA NO3( 1.7 mg/1 as N). <br /> Water quality test DBCP-ND. <br /> Fall 1998,San Joaquin County Flood Control About 70 feet. Gradient about 6.25 feet/mile,flowing <br /> and Water Conservation District map. toward the east. <br /> — Spring 1999, San Joaquin County Flood About 64 feet. Gradient about 3.8 feet/mile, <br /> Control and Water Conservation District. flowing toward southeast. <br /> Note: ND=Non-Detectable(or not found at detectable limits). <br /> The depth to ground water at the site was found recently to range between 70 to 64 feet in <br /> Fall 1998 and Spring 1999 respectfully (see Plate 2 and Plate 3). The ground-water flow <br /> direction for Fall 1998 was toward the east with a gradient of about 6.25 feet per mile. The <br /> ground-water flow direction for Spring 1999 was toward the southeast with a gradient of about <br /> 3.8 feet per mile. <br /> A water sample was obtained from the onsite water well on March 9, 2001 and sent to <br /> FGL Environmental Laboratory for testing. The samples were tested for the presence of <br /> dibromochloropropane (DBCP) and Nitrate(NO)per County requirements. <br /> The test results indicated that DBCP was non-detectable (ND) and nitrate as NO3 was <br /> found at 7.6 mg/I ( 1.7 mg/1-N). The result of the nitrate test indicates the ground water is below <br /> the maximum contaminate level set by the United States Environmental Protection Agency of 45 <br /> mg/1-NO3 for nitrate (or 10 mg/1 as Nitrate N). No construction information for the well was <br /> available. <br /> The presence of nitrates and DBCP are not uncommon in shallow ground-water aquifers <br /> in San Joaquin County and other parts of the Central Valley. Nitrate in ground water occurs as a <br /> result of the application of fertilizers, livestock waste, and untreated septic tank waste. Nitrate is <br /> pERSpL <br /> �'rSpG♦ <br />