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s <br /> u <br /> ENVIRONMENTAL ISE A.LTH DEPARTMENT <br /> SAN JOAQUIN COUNTYUnitSupervisors <br /> s._�...G <br /> Donna K.Henan,R.E.H.S. 304 East Weber Avenue, Third Floor Carl 13orgman,R.E.H.S. <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> "` '• Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> ••�;•, - rp Program Manager Telephone: (209) 458-3420 Margaret Lagorio,R.E.H.S. <br /> Qci Foy`' Laurie A.Cotulia,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> JAMES GIOTTONINI MAY 0 12002 <br /> PUBLIC WORKS DIRECTOR <br /> CITY OF STOCKTON <br /> 425 N EL DORADO <br /> STOCKTON CA 95242 <br /> RE: City of Stockton sites in the Local Oversight Program <br /> A meeting was held on April 11, 2002, at the office of San Joaquin County <br /> Environmental Health Department (EHD). Attending the meeting were Sharla <br /> Hardy, Wayne Smith and you representing City of Stockton (COS), William Little <br /> representing Advanced GeoEnvironmental, Inc. (AGE), Jeanne Homsey <br /> representing ATC Associates (ATC), and Margaret Lagorio, Nuel C. Henderson, <br /> and Jeff Wong representing EHD. The following is a summary of the site <br /> discussions at the meeting. <br /> Fontana Drive at Smith Canal <br /> ATC installed monitoring well #7 (MW-7) in February 2002. According to <br /> Summary Report dated April 10, 2002 prepared by ATC, analytical results <br /> of the two soil samples collected during the well installation were non- <br /> detect for total petroleum hydrocarbons as diesel (TPH-d). Analytical <br /> results of the water sample from MW-7 were 100 micrograms per liter <br /> ([tgll) of TPH-d. Four quarters of sampling are required as discussed in <br /> the meeting in October 2001. EHD requested cross-sections for the site <br /> be submitted and a table with historical depths to groundwater be included <br /> in future quarterly monitoring reports. <br /> 110 W. Sonora <br /> Petroleum hydrocarbons were detected in the analytical results of the <br /> three water samples collected from the deepest well on the site, RW-1, <br /> according to Quarterly Monitoring Report First Quarter 2002 dated April <br /> 10, 2002, prepared by AGE. Water samples were collected from first <br /> water level and the bottom of the well using a disposable bailer and a <br /> bomb sampler. Contamination in groundwater may not be vertically <br /> defined. EHD recommended installing additional discretely screened <br /> deep monitoring wells. Submit a work plan that will define the vertical <br /> extent of the groundwater contamination to EHD by June 10, 2002. <br /> Operation of the soil vapor extraction system should continue. <br />