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PUBLICSERViCESU <br /> EALTH �totz.:N <br /> SAN <br /> SAIV JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION y <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer l <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 ► Stockton, C `9Lii a P <br /> t <br /> ED <br /> 209/468-3420 : <br /> MARY LEHR MAILED MAR 111996 <br /> 1250 EDGEWOOD DR <br /> LODI CA 95240 <br /> RE: Arts ,and Artists SITE CODE: 2423 <br /> 204 East Lodi Avenue, Lodi CA <br /> San"kJoaquin' County Public Health Services, Environmental Health Division <br /> (PH'S/EHD) 1has completed review of the ;Quarterly Report - October 1995" dated <br /> January 22, 1996 and the "Work Plan for ;Hydrocarbon-impacted Soil Remediation <br /> Progress Drilling" dated February 12, 1996 both prepared by Advanced <br /> Ged!Environmental. PHSIEHD has also reviewed your correspondence dated <br /> February 5; 1996. PHS/EHD has the following comments for your consideration. <br /> Quarterly Report <br /> Therquarterly report included the results of the October 20, 1995 sampling event <br /> ed to evidence si nificant 'round <br /> water contamination. The <br /> which cont�inu 9 9 <br /> horizontal extent of groundwater contamination has been determined, with the <br /> excpeption of to the south of monitoring well, MW5. The inclusion of tabulated <br /> groundwater stabilization data is not necessary, since monitoring well field logs are <br /> submitted within the quarterly report. As..:you are aware, PHS/EHD is interested in <br /> water quality data from MW3 and the October 20, 1995 field log for this well <br /> indicated that it was purged and a sample€:identification designated, yet the sample <br /> was not included on the chain of custody" PHS/EHD was subsequently informed <br /> by Advanced Geo Environmental staff that this well did not sufficiently recharge so <br /> that a sample could be collected. This type of information should be included in <br /> theiilreport text and on the field logs. <br /> PHS/EHD has evaluated the request to reduce the sampling frequency of MW6 and <br /> it . PH'S EHD concurs with the requested <br /> quarterly to semi-annus 1 q <br /> MW$ from; q Y Y <br /> redhuction. .{ PHS/EHD will continue to evall'ate the necessity for an additional well <br /> downgradient, to the south, of MW5, as-further monitoring information becomes <br /> available. <br /> Thequarterly report also included a summary of the soil vapor. extraction/air sparge <br /> remediation system. The system has operated for a total of 1 ,440 hours at an <br /> average extraction rate of 70 cubic feet per minute since August 15, 1995 and <br /> through October 31 , 1995. It was estimated that approximately 621 gallons of <br /> gasoline were removed from the subsurface. <br /> A Division of San Joaquin County Health Care Services <br />