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CH2M HILL <br /> 155 Grand Avenue <br /> Suite 1000 <br /> Oakland,CA - <br /> CH2MHILL ® C82001 94612 <br /> �Iy,.t.��i�sJ!E(V i faL NEAL�M P.O.Box 12681 <br /> VICES Oakland,CA <br /> PERiT/SER 94604-2681 <br /> December 19,2001 { <br /> Tel 510.251.2426 <br /> 131420.A1.09 _ Fax 510.893.8205 <br /> -� <br /> 7/7 <br /> a <br /> Mike Infurna s U/ <br /> San Joaquin County Public Health Services <br /> LOP/Site Mitigation Unit / 4 <br /> Environmental Health Division <br /> 304 E.Weber Ave.,Third Floor <br /> Stockton,CA 95202 <br /> Subject: Del Monte DISCO Site, 110 Filbert St.,Stockton,California <br /> Groundwater Analytical Results from Newly Installed Monitoring Wells <br /> Dear Mr.Infurna: <br /> This letter is being submitted by CH2M HILL on behalf of Del Monte to provide the latest <br /> groundwater analytical results for newly installed monitoring wells at the Del Monte <br /> DISCO site,located at 110 Filbert Street,in Stockton California. A total of six (6)monitoring <br /> wells (MW-DIS-11,-11D,-12,43,-14,and-14D)were installed between October 29 and <br /> December 11,2001,downgradient of the Disco site.All newly installed wells,with the <br /> exception of MW-DIS-11D,have been developed and sampled.Groundwater samples from <br /> each well were analyzed for total petroleum hydrocarbons as gasoline (TPH-g),benzene, <br /> toluene,ethyl benzene,total xylenes(BTEX), 1,2-DCA, 1,2-EDB,and TBA.MW-DIS-11D has . <br /> been developed,and is scheduled to be sampled the last week of December 2001.The well <br /> completion details for the new wells and the results of the groundwater sampling are <br /> summarized on Tables 1 and 2, 'respectively.The ground surface elevations_ and top-of- <br /> casing elevations of each well will be surveyed in early 2002. <br /> As shown on Table 2, total petroleum hydrocarbons as gasoline,benzene,and 1,2-DCA <br /> were detected in monitoring well MW-DIS-11,and 1,2-DCA was detected in monitoring <br /> well MW-DIS-14. These detections will be confirmed during the Fourth Quarter,2001 <br /> Groundwater Monitoring Event,scheduled for late December,2001. <br /> If you have any questions please contact Rich Fish/Del Monte at 925-944-7276,or myself at *' <br /> 510-251-2888 ext. 2101. <br />