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J _ <br /> 1 <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> Donna K. Heran, 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.I. <br /> At Olsen, R.E.H.S. Stoel{ton, California 95202-2708 Douglas W. Wilson, R.E.H.S. <br /> P Program Manager Telephone: (209) 468-3420 Margaret Lagorio, R.E.H.S. <br /> 44coeN 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 /> LAWRENCE H BEASLEY MAR 0 12002 <br /> 2120 PEBBLE DRIVE <br /> ALAMO CA 94507 <br /> RE: Former Apache Plastics Site SITE CODE : 2313 <br /> 2050 Fremont Street <br /> Stockton CA 95209 <br /> San Joaquin County Environmental Health Department (SJC/EHD) has reviewed the <br /> "Soil and Groundwater Investigation Report" dated July 27, 2001 , and the "Fourth <br /> Quarter 2001 Quarterly Monitoring Report" dated November 30, 2001 that were <br /> submitted on your behalf by Stratus Environmental , Inc. (Stratus) and has the following <br /> comments. <br /> The Investigation Report documents a soil and groundwater investigation that took place <br /> at this site in February and March of 2001 . The investigation included the advancement <br /> of thirteen cone penetrometer test (CPT) borings and the installation of three deep <br /> groundwater monitoring wells. Two of the wells , MW-10 and MW- 11 were built to 110- <br /> feet below surface grade (bsg) with ten feet of screened casing, and the third, MWA 2, <br /> was built to 115-feet bsg with fifteen feet of screened casing . Discrete soil and <br /> groundwater samples were collected adjacent to the CPT borings. <br /> The report recommends the installation of additional monitoring wells to the north of the <br /> site and to the southeast of the former underground storage tank location (near CPT-10), <br /> the replacement of MWA2 and MW-3, which appear to be obstructed , and the <br /> redevelopment of MW-8 and MW-9, which have several feet of sediment in them . The <br /> report also recommends that a well survey be completed . <br /> SJC/E.HD agrees that a well survey must be completed for this site. SJC/EHD agrees <br /> with the installation of the proposed monitoring wells, one shallow and one deep, near <br /> CPT-10 , and with the replacements of MW-3 and MW-12. Any wells should be <br /> redeveloped when deemed necessary. SJC/EHD does not agree with the need for two <br /> wells north of the site, but would approve the installation of one shallower well near the <br /> current MW-11 if you choose to proceed with it. <br /> In October of 1991 a San Joaquin County permit was issued for the destruction of MWA <br /> at this site. The destruction was necessitated by a construction project to widen <br /> Fremont Street. On May 4, 1992 the well was properly destroyed under inspection by <br /> San Joaquin County Environmental Health personnel . Though you were directed to <br /> install a replacement for MW-1 (see SJC/EHD correspondence dated September 2, <br /> 1992), no documentation exists in our files that this was ever done. Quarterly monitoring <br /> reports from second quarter 1992 through 1997 reflect that no MWA existed at the site. <br /> At the quarterly monitoring and sampling events that took place on May 18, 2001 and <br /> November 5 , 2001 , a well was sampled and labeled MW-1 <br />