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4 I. <br /> AEGIS ENVIRONMENTAL , INC . <br /> 801 Riverside Avenue,Suite C,Roseville,CA 95678 ♦ 916.7 2-211011916.969-21101 FAX 916.786-7830 <br /> May 1, 1991 <br /> FMIF <br /> Ms. Margaret Lagorio � m ; <br /> San Joaquin County Public Health Services Department MAY 6 c <br /> Environmental Health Division <br /> 445 N. San Joaquin Street, Unit IV �' ENVIRONMENTAL "il*fia.i•TH <br /> Stockton, California 95202 PERM T/SER4'l�l~S <br /> d <br /> Re: Quarterly Monitoring Report" for: <br /> Shell Service Station, WIC No.:-204-4416-0202 <br /> 420 West Kettleman Lane, Lodi, California <br /> Dear Ms. Lagorio: 1 <br /> Aegis Environmental, Inc. (Aegis) is pleased to submit the referenced report for the Shell <br /> Service Station at 420 West Kettleman Lane in Lodi, California. <br /> Aegis would like to submit a request to change depth to groundwater measurements from <br /> monthly to quarterly. The groundwater gradient and flow direction has been established <br /> through previous measurements. Therefore, data collectedion a quarterly basis would <br /> suffice for future definition of groundwater flow direction and, gradient. <br /> can be reached at 916 782-2110 if you have any qu�e stions or concerns. Thank you. <br /> 4Sin erely, <br /> Ja que ' e R. Doub <br /> Project Engineer <br /> JRD/vcj <br /> Enclosures <br /> cc: K. Miller, Shell Oil Company <br /> d <br /> 89-013G.LTR . <br /> GEOLOGISTS ENGINEERS GROUND WATER SCIENTISTS <br /> f <br />