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16 PUBLIC HEALTH SERVICES <br /> L <br /> )A\ [0AQL1\ COL`TY �/ < <br /> foci[kriAINNI� \[ l) %I P liVol <br /> H <br /> �e�i�7 otr cr• r��P <br /> q; N <br /> P n Box 2009 • (1601 East Hazciton Avrnue) • Stockton CsldFornra 95201 R o <br /> (209) 468-3400 - <br /> utj <br /> RIC NOTINI <br /> DIRECTOR OF ENVIRONMENTAL SERVICES <br />' CATELLUS DEVELOPMENT CORP f ' DEC 0 2 M1 <br /> 201 MISSION STREET 30TH FLOOR u <br /> SAN FRANCISCO CA 94105 <br />' RE. Farmers Feed SPIE CODE. 1284 <br /> APN #145-190-16 <br />' 1515 West Weber Ave, former tank#1 <br /> 1325 West Weber Ave, former tank#2 <br /> 1541 West Weber Ave, former tank#3 <br /> Stockton, CA 95203 <br /> San Joaquin County, Public Health Services, Environmental Health Division (PHS/EHD), has reviewed the <br /> Third Quarter Groundwater Monitoring Report dated October 9, 1991 and the Interum Preliminary <br /> Assessment Report dated October 1991, both prepared by ERM West. PHS/EHD comments follow. <br /> Third Quarter 1991 Groundwater Monitorinz Repot <br /> 1 PHS/EHD was not notified of the September 9, 1991 sampling event. Please be informed <br /> that PHS/EHD inspections of sampling events are an important aspect of local regulatory <br /> oversight. Prior to any future sampling event, please contact Mary Meays at the number <br />' below, 48 hours in advance. <br /> 2. Monitoring well purge records were not included. These records are important to verify <br /> that groundwater conditions have stabilized prior to sampling This information is <br />' referenced in the Tri-Regional Recommendations,Appendix A. A copy is enclosed for your <br /> information. Please include monitoring well purge data in all future quarterly reports. <br />' 3. Tidal influence was suggested to be the cause of shifts from a southwest gradient to a <br /> southeast groundwater gradient Please include in quarterly reports a copy of the tide table <br /> for the date of sampling It may be necessary to do more frequent monitoring of <br /> groundwater depth in order to clarify the cause of fluxations. it also may be necessary to <br /> have the monitoring wells professionally surveyed to more accurately determine <br /> groundwater elevations. <br />' Intenm Preliminary Assessment Report <br /> 4 Organic lead analysis does not differentiate between soluble and insoluble lead. <br /> Unfortunately, total lead concentrations of MW2 or MW3 soil boring samples were not <br /> analyzed. It will be necessary to do additional investigation in order to determine the Ievels <br /> of lead that have a potential impact or that have impacted groundwater. The November 16, <br /> 1988 analysis of liquid from the 1515 West Weber tank pit indicated 2.6 ppm lead. <br /> R Dtv%K-of ban Jmqum rtNrsy Hadth Care berm--cs �� <br />