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Larry's Auto Page 2
<br /> 308 North Grant Street March 28, 2008
<br /> Stockton, California 202
<br /> extraction should also be implemented to expedite interim remediation at your site. Submit a work
<br /> plan for groundwater extraction to the EHD by June 13, 2008.
<br /> The EHD has reviewed the analytical results for groundwater samples collected at your site and
<br /> directs that soil vapor wells VW-213, VW-3, VW-4, VW-513, and VW-5C, which are the closest to
<br /> being screened at the water table, be monitored and sampled semiannually instead of annually, as
<br /> was directed by the EHD by letter dated December 27, 2005. Groundwater collected from all wells
<br /> should be analyzed for total petroleum hydrocarbons (TPH) quantified as gasoline (TPHg);
<br /> benzene, toluene, ethyl benzene, and total xylenes (BTEX); methyl tertiary-butyl ether (MTBE),
<br /> ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), di-isopropyl ether (DIPE),
<br /> tertiary butyl alcohol (TBA), 1,2-dichloroethane (1,2-DCA) and 1,2-dibromoethane (EDB). hi
<br /> addition, continue to analyze for TPH quantified as diesel (TPHd) in groundwater collected from
<br /> MW-4, and analyze for TPHd in groundwater collected from the four newly-proposed monitoring
<br /> wells at least once. If TPHd is detected in any of the newly installed monitoring wells, the well(s)
<br /> should be sampled and analyzed for TPHd the following quarter(s) until concentrations for TPHd
<br /> are reported as non-detect. Annually report analyses for isopropylbenzene,n-propylbenzene, 1,3,5-
<br /> trimethybenzene, 1,2,4-trimethylbenzene, p-isopropyltoluene, and naphthalene for groundwater
<br /> collected from all monitoring wells and vapor extraction wells.
<br /> The EHD does not have the complete boring log for cone penetration test boring CPT-2. Please
<br /> submit a copy of this boring log to the EHD at your earliest convenience. If you have any
<br /> questions, please contact Vicki McCartney, Senior Registered Environmental Health Specialist, at
<br /> (209)468-9852 or by email at vniccartnev(rdsicehd.com.
<br /> Sincerely,
<br /> Victoria L.McCartney,REHS Nuel C. Henderson,Jr.,PG
<br /> Senior Registered Environmental Health Specialist Engineering Geologist
<br /> c: Mr. William R. Little, Advanced GeoEnvironmental, Inc., 837 Shaw Road, Stockton,
<br /> California 95215
<br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central
<br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670
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