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AEGIS ENVIRONMENTAL , INC . <br /> I. <br /> 1050 Melody Lane, Suite 160, Roseville, CA 95678 + 916. 782-21 1 0 1 91 6.969-2110 FAX 916.786-7830 <br /> April 15, 1992 <br /> Ms. Margaret Lagorio, Senior REHS <br /> San Joaquin County Public Health Services <br /> Environmental Health Division KEW <br /> Post Office Box 2009 <br /> Stockton, California 95201 APR 2 1 1992 <br /> �t N V I R 0 N fv'E,"'ti t-.4L H EA 1 T H <br /> Subject: Analysis for Ethylene Dibromide <br /> Shell Service Station (WIC No. 204-4416-0202) <br /> 420 West Kettleman Lane, Lodi, California <br /> Dear Ms. Lagorio: I <br /> Aegis Environmental, Inc. (Aegis), plans to discontinue site analysis for ethylene dibromide <br /> (EDB) for groundwater monitoring at the subject as per your letter dated <br /> January 29, 1992 (Attachment 1), and our telephone conversation on April 13, 1992. <br /> Groundwater samples collected from monitoring wells MW-1 and MW-3, and analyzed by <br /> NET Pacific, Inc., of Santa Rosa, California, a state-certified fied laboratory for EDB by EPA <br /> Method 504.1 with a detection limit of 0.01 parts-per-billion (ppb). Laboratory analysis of <br /> the water samples collected from monitoring wells MW-.i! and:'MW-3 indicated less than <br /> 0.01 ppb EDB. Laboratory analytical reports and the chain-of-Pustody form are included <br /> in Attachment 2. <br /> If you have any questions or concerns, please feel free�to call us at (916) 782-2110. <br /> Sincerely, <br /> Arthur S. Chen, III <br /> Staff Engineer <br /> ASC law <br /> Attachments <br /> cc: Dan Kirk, Shell Oil Company <br /> Central Valley Regional Water Quality Control Board <br /> Jacqueline Doub, Aegis <br /> 89-0130.LTR <br /> I I J <br /> GEOLOGISTS - ENGINEERS - GROUNDWATER SCIENTISTS <br />