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TAN.29-1993 17:53 FROM <br /> TO 12094643138 P.@? <br /> AEGIS E <br /> . NVIRONN.IENTAL , INC , <br /> 1050 Melody Lar7e,Suite 160, Roseville,CA 95678 ♦ 916.782-2110 J 916.969-2110 1 FAX 916.786.7830 <br /> January 29, 1993 <br /> FEB 011993 <br /> Mr. Michael Collins ENVIRONMENTAL HEALTH <br /> San Joaquin County Public Health Services PERMIT/SERVICES <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95201 <br /> Subject: Shall Service Station (Milo No. 204-7524-2408) <br /> 4445 Pershing Avenue, Stockton, California <br /> Site Code: 1785 <br /> Dear Mr. Collins: <br /> Aegis Environmental, Inc. (Aegis), has received a copy of the letter, dated <br /> December 9, 1992, from the San Joaquin County Environmental Health Division <br /> (SJGEHD) to Mr. Dan Krk of Shell Oil Company`(Shell) regarding the subject site. The <br /> letter, in part, states: a "mon#toring well should be constructed below the first aquifer and <br /> soil below the first aquifer should be sampled and (analyzed." <br /> It is the opinion of Aegis and Shell the soil and groundwater investigations conducted to <br /> date were adequate and appropriate. It is also our opinion sufficient data does not exist <br /> to warrant the drilling and installation of a monitoring well below the first aquifer, and incur <br /> the risks such exploration poses. <br /> Shell has complied with all SJCEHD requests regarrr#ing the site. The SJCEHD reviewed <br /> and approved all workplans prior to the respective subsurface investigations. <br /> Aegis has performed all subsurface investigations at the site to date according to the <br /> methods described in the "Leaking Underground Fuel Tank Field Manual," and the 'Tri- <br /> Regional" guidelines. Wells MW-1 through Mv11-4lwere constructed according to the , <br /> standards found in California Code of Regulations, Title 23, Sections 2647 and 2648, and <br /> in the California Department of Water Resources Bulletin 74-81/90. <br /> 89-016Y.LTR <br /> GEOLOGISTS ENGINEERS GROUNDWATER SCIFiNTtSTS <br /> it �� <br />