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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> >�•'�,��.'�o� Unit Supervisors <br /> Donna K.Reran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor <br /> Director Mike Huggins,R.E.H.S.,R.D.1, <br /> H Al Olsen,R.E.H.S. Stockton, California 95202-2708 <br /> Douglas W.Wilson,R.E.H.S. <br /> • �q a�P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> cr F oR Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> JONATHAN MARLOWE APR 2 3 iuuz <br /> MARLOWE PROERTIES <br /> P O BOX 150211 <br /> SAN RAFAEL CA 94915-0211 <br /> RE: Marlowe Property SITE CODE: 1828 <br /> 4648 Waterloo Road <br /> Stockton CA 95215 <br /> San Joaquin County Environmental Health Department (SJC/EHD) has reviewed the <br /> "Groundwater Monitoring Report— First Quarter 2002" dated March 28, 2002 that was <br /> prepared on your behalf by Advanced GeoEnviron mental, Inc. and has the following <br /> comments. <br /> The report documents the groundwater monitoring and sampling event that took place on <br /> January 30, 2002. Groundwater samples were collected from the six monitoring wells and <br /> one vapor extraction well located onsite. The samples were analyzed for total petroleum <br /> hydrocarbons (TPH) as diesel, TPH as gasoline, benzene, toluene, ethylbenzene and <br /> xylenes (BTEX), fuel oxygenates, 1,2-dichloroethane (1,2-DCA) and ethylene dibromide <br /> by appropriate EPA approved methods. Results of the analyses were non-detect for all <br /> constituents analyzed except for 59 parts per billion (ppb)TPHg in MW-1 and 1.5 ppb, 77 <br /> ppb, 5.3 ppb, and 5.6 ppb 1,2-DCA in MW-1, MW-5, MW-6 and VW-1 respectively. <br /> The report recommends that the monitoring wells impacted with 1,2-DCA be sampled <br /> three more times to monitor the trends of the contamination. SJC/EHD agrees with this <br /> recommendation. Quarterly monitoring and sampling of the shallow monitoring wells <br /> should continue through the end of 2002. The second quarter event will be scheduled for <br /> June 2002. <br /> If you have any questions or comments please call Lori Duncan at (209)468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> -C�'� trait01 <br /> Lori Duncan, Senior REHS Nuel C. Henderson, Jr. R.G. v• <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: Marty Hartzell, CVRWQCB <br /> Brian Millman, Advanced GeoEnvironmental, Inc. <br />