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Site Background Information <br /> Eckert Cold Storage,Manteca,CA <br />' February 8,2005 <br /> Page 5 of 5 <br /> MW-3, MW-4, and MW-6 was 0 001 ft/ft towards the northwest, and was generally consistent with <br /> historic groundwater gradients estimated for the site <br /> Condor conducted the second quarter 2004 groundwater monitoring event at the site on June 23, 2004 <br />' Groundwater samples were collected and submitted for laboratory analyses from monitoring wells MW4, <br /> MW-8, and domestic well DW-1 No separate phase petroleum was noted in the wells, but a moderate <br /> petroleum odor was noted in groundwater inspection samples recovered from MW-4 and MW-8 The <br /> groundwater samples collected from the monitoring wells and the domestic well were analyzed for <br />' BTEX, TPH-G, and selected gasoline oxygenates/additives including MTBE Laboratory analytical <br /> results for the June 23, 2004 monitoring event were generally consistent with historical laboratory <br /> analytical results <br />' The average groundwater elevation was approximately 2 01 feet lower on June 23, 2004 than the previous <br /> sampling event conducted on March 17, 2004 The groundwater elevation contours estimated with the <br />' depth to water measurements indicated the groundwater gradient was variable but overall towards the <br /> northwest The groundwater gradient estimated with a three-point construction using wells MW-3, MW- <br /> 4, and MW-6 was 0 002 ft/ft towards the northwest, and was generally consistent with historic <br />' groundwater gradients estimated for the site <br /> Condor conducted the third quarter 2004 groundwater monitoring event at the site on September 7, 2004 <br />' Groundwater samples were collected and submitted for laboratory analyses from monitoring wells MW4 <br /> and MW-8 No separate phase petroleum was noted in the wells, but a strong petroleum odor was noted in <br /> groundwater inspection sample recovered from MW-8 The groundwater samples collected from the two <br /> . monitoring wells were analyzed for BTEX, TPH-G, and selected gasoline oxygenates/additives including <br />' MTBE Laboratory analytical results for the September 7, 2004 monitoring event were generally <br /> consistent with historical laboratory analytical results <br />' Water levels were collected from all eight of the sites monitoring wells The average groundwater <br /> elevation was approximately 128 feet lower on September 7, 2004 than the previous sampling event <br /> conducted on June 23, 2004 The groundwater gradient estimated with a three-point construction using <br /> wells MW-3, MW-4, and MW-6 was approximately 0 001 ft/ft towards the north Historically, the j <br />' groundwater gradient is variable,but generally to the northwest <br /> 1 <br /> 1 <br /> I <br /> i <br />' P 13000_pr)13471 Eckert Cold Storage13471E 2004 Quarterly Groundwater MomtonnglReportslDcc-20041Srte Background doe <br />