Laserfiche WebLink
PUBLIC YiEALTH SERVICES <br /> PQV�N <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION -� <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer - <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, C88 <br /> 209/468-3420cp <br /> MORESCO VINEYARDS <br /> C\O MIKE McGRANAHAN <br /> PO BOX 5018 MAILED DE C 2 F1 149=7 <br /> MODESTO CA 95352-5018 <br /> RE: COMMENTS ON THE DECEMBER 20, 1995 SITE CODE: 505486 <br /> ADDENDUM WORK PLAN FOR 16865 GAWNE RD, <br /> FORMER MORESCO PROPERTY <br /> San Joaquin County Public Health Services Environmental Health Division (PHS\EHD) staff have recently <br /> reviewed the addendum work plan dated December 20, 1995 for the above referenced site and provides the <br /> following comments. <br /> Laboratory analysis of samples generated from soil borings at the site indicate the presence of petroleum <br /> hydrocarbon constituents (TPH and BTEX) at depths ranging from 19 feet to 60 feet below grade surface (bgs). <br /> The greatest contaminant mass known at this stage of characterization and assessment appears at the 19 to 40 foot <br /> bgs interval. Approximately 40 feet of separation is observed at this site from the-last known contaminant <br /> detected in soil samples (60 feet bgs) to ground water(depth to ground water is approximately 100 feet bgs). Soil <br /> borings to the south and west of the tank excavation are non-detect for TPH and BTEX providing incomplete <br /> delineation to the east and north. <br /> PHS\EHD concurs with Geological Techniques Inc. proposals to perform additional soil borings and sample <br /> collection at this site in an attempt to further define the lateral and vertical distribution of petroleum <br /> contaminants. <br /> However,PHS\EFID does not concur with Geological Techniques Inc.proposals to perform interim remediation <br /> studies or activities at this site given the data available to date. Justification for interim remediation is currently <br /> unwarranted. <br /> PHS\EHD therefore recommends further assessment at this site with appropriate modifications to this work plan <br /> to provide analytical data which may lead to site closure including but not limited to geophysical data acquisition <br /> for the purpose of fate and transport risk assessment. <br /> Should you have any questions regarding this correspondence please contact Ronald Rowe of PHS\EHD Site <br /> Mitigation at (209) 468-0342. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Ronald Rowe, Senior REHS Dia�Hinson, EHSi <br /> Site Mitigation Unit Supervisor <br /> cc: Geological Techniques Inc. - Tim McDonald <br /> SWRCB - George Lockwood <br /> A Division of San Joaquin County Health Care Services <br />