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McClelland consultants i .989 <br /> Project No. 09-01-1308 <br /> March 10, 1989 <br /> Ogden Environmental Service, Inc. <br /> 10955 John Jay Hopkins Drive <br /> San Diego, CA 92121 <br /> Attention: Mr. Bill Rickman <br /> Post-Remediation Compliance <br /> Groundwater Monitoring <br /> Former Tillie Lewis Foods Cannery <br /> Stockton, California <br /> In response to your request, we have evaluated the existing dewatering wells <br /> at the Tillie Lewis site for potential use as compliance monitoring wells. <br /> Gordon Boggs of the Central Valley Regional Water Quality Control Board (RWQCB) <br /> and Laurie Cotulla of the San Joaquin Local Health District (SJLHD) have <br /> indicated that verification groundwater sampling would be required subsequent to <br /> soil and groundwater remediation at the site. In our letter dated February 20, <br /> 1989 we submitted copies of the boring/monitoring well logs for your review. we <br /> believe that dewatering wells 31, 80, and 132 will provide sufficient control to <br /> monitor groundwater quality at the site (see Plate 1) . These wells are all <br /> ,7 completed within the upper 35 feet (the zone of previous contamination) and are <br /> Lscreened above static (non-pumping) groundwater levels. Well #31 corresponds to <br /> ,A the suspected downgradient direction of groundwater flow with respect to the <br /> former tank location. <br /> We suggest that compliance monitoring include the following: <br /> o Install protective locking wellhead covers over the tops of the wells. <br /> o Survey the wellheads to establish vertical control for subsequent water <br /> level measurements. <br /> o Collect groundwater quality samples on a quarterly basis for a period <br /> of 6 months. <br /> o Analyze water samples for Total Extractable Petroleum Hydrocarbons <br /> (TEPH) fuel fingerprint; and Total Volatile Petroleum Hydrocarbons <br /> (TVPH) using the GC/MS analytical method. <br /> .mccel!ano coosu.r2r,s'`Piesr.Inc <br /> 2140[aslman Are^„e.ven-_ra -_a,­,,,a=2003 <br /> acS;F44-3533 FAX 3'5.542-_-9l <br /> A member of the Fugro-McClelland group of companies <br />