Laserfiche WebLink
I <br /> PUBLIC HEALTH SER'NICES <br /> SAN JOAQUIN COUNTY <br /> JOGI KHANNA MD.,M.P H. i <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) •5tockto L�-n95201 0 <br /> (209)468-3400 <br /> 015C ,. <br /> F t <br /> RIC NOTINI i <br /> DIRECTOR OF ENVIRONMENTAL SERVICES 11 <br /> CATELLUS DEVELOPMENT CORPORATION E <br /> 201 MISSION STREET 30TH FLOOR <br /> SAN FRANCISCO CA 94105 DEC .10 1992: <br /> RE: Catellus Development Property SITE CODE: 1284 <br /> 1325 West Weber <br /> Stockton CA 95203 ff ,E <br /> APN 145-190-16 it 6 <br /> fj <br /> A beneficial meeting was held on December 18, 1992 at the office of San Joaquin County Public Health <br /> Services Environmental Health Division (PHS/EHD). The meeting was attended by Kim Brandt <br /> representing Catellus Development,John Prall and Bruce Pfaff reprelsenting ERM-West and Mary Meays <br /> J representing PHS/EHD. The meeting was requested by ERM-West.to discuss the investigation and <br /> remediation of the site. PHS/EHD has prepared a summary of the meeting for your information. <br /> Former tank #1 was removed on November 16, 1988 and significant contamination was detected in both <br /> the soil sample collected beneath the tank and the water sample collected from the tank pit. <br /> Subsequently, Kleinfelder conducted an investigation of soil and groundwater contamination which <br /> consisted of a soil/gas survey; the installation of three soil borings, B1 - B31in the vicinity of the former <br /> tank; and the installation of three monitoring wells, MW1 - MW3. Based on these results ERM-West <br /> installed additional monitoring well, MW4, a downgradient wen and;monitoring well, MW5, located in the <br /> former tank pit area. ERM-West has continued to monitor these wells quarterly. Quarterly groundwater <br /> monitoring results indicated continued contamination of MW4 and MW5. i1 <br /> il <br /> Former tank #2 was removed on August 27, 1991 and significant contamination was detected in the soil <br /> sample collected beneath the tank, the water sample collected from the tank pit and the soil sample <br /> collected from stockpiled soil which was removed around the tank. Subsequently, ERM-West began <br /> investigation of soil and groundwater contamination which consisted�of theiinstallation of four monitoring <br /> wells, MWIA - MW4A. Soil and groundwater contamination was confirmed in samples collected, though <br /> it appeared that soil contamination was limited to the first 15 feet. k <br /> ! <br /> No agreement was reached regarding the effectiveness of monitoring!wells hich are screened below the <br /> static water level to detect petroleum hydrocarbon contamination. Additionally, the "perched" condition of <br /> groundwater observed in MW2A was discussed. Until more is known about the hydrogeology of the site, <br /> ERM-West and Catellus expressed unwiIIingness to install monitoring wells at depths which may <br /> potentially contaminate soil not previously contaminated. i <br /> PHS/EHD requested that groundwater gradient measurements be collected,immediately upon arrival for <br /> quarterly monitoring. ERM-West agreed to monitor static water level both upon arrival and <br /> prior to <br /> departure. PHS/EHD will continue to evaluate groundwater monitoring data. j <br /> r <br /> 'F <br /> rA Division of San Joaquin C.ounry Health Cue Scrv,ccs <br />