Laserfiche WebLink
PUBLIt HEALTH SERVICES <br /> SAN JOAQUIN COUNTY to ya <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer P <br /> c9li. pRa� <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> (209) 468-3400 <br /> STELLA RUIZ <br /> 4491 WEST DURHAM FERRY ROAD JAN 11 1993 <br /> TRACY CA 95376 <br /> RE: Ruiz Grocery SITE CODE: 1551 <br /> 4491 West Durham Ferry Road <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the "Interim Remedial Action Plan" dated December 18, 1992 and prepared <br /> by Delta Environmental. PHS/EHD has the following comments for your consideration. <br /> The Interim Remedial Action Plan (RAP) proposed interim soil remediation alternatives. <br /> PHS/EHD concurs that soil remediation is necessary and that the proposed alternative, <br /> in situ soil vapor extraction (SVE) is an effective method to remediate contaminated soil. <br /> The final selection of the soil vapor treatment method will be dependent on the San <br /> Joaquin Valley Unified Air Pollution Control District's air discharge permit requirements. <br /> Since soil vapor wells have neither been installed nor been tested, to determine the <br /> concentration of extractable petroleum hydrocarbons, it may be premature to select the <br /> vapor treatment method at this time. <br /> Please submit a work plan to install SVE wells by April 12, 1993. <br /> The RAP did not propose interim groundwater remediation alternatives primarily <br /> because the extent of groundwater contamination is not known. In order to determine <br /> the extent of groundwater contamination it will be necessary to install additional <br /> monitoring wells. <br /> Conflicting groundwater gradient directions have been reported. Please conduct a well <br /> survey to determine if nearby wells may have an influence on the gradient. <br /> The RAP indicated that the on site domestic well had not been sampled since September <br /> 4, 1991. PHS/EHD requested, in correspondence dated June 11, 1992, that the on site <br /> domestic well be sampled and analyzed for the presence of BTEX and TPH-gasoline. <br /> During the next quarterly monitoring event, pleasb include sampling of the on site <br /> domestic well. <br /> A Division of san Joaquin County Health Care Services <br />