Laserfiche WebLink
San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> 600 East Main Street <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> N Robert McClellon,RENS <br /> •' Jeff Carruesco,REHS,RDI <br /> Cq •. ��P Website: www.sjgov.org/ehd Kasey Foley,REHS <br /> Phone: (209) 468-3420 Linda Turkatte,REHS -� <br /> Fax: (209)464-0138 . <br /> October 27, 2010 <br /> Mr. Ellis Cecchini <br /> Cecchini Cecchini & Giovannoni <br /> 6 Northridge Court <br /> Antioch, CA 94509 <br /> Subject: Cherokee Truck (former) CUF#: 8109 <br /> 3535 E. Cherokee Road RO#: 0118 <br /> Stockton, CA 95205 Global ID#: T0607700156 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed <br /> High Vacuum Soil Vapor Extraction Pilot Test Report (Report) dated May 20, 2010 <br /> submitted by your consultant, Advanced GeoEnvironmental Inc., (AGE). The <br /> Report details the 8-hour high vacuum soil vapor extraction (SVE) pilot test <br /> conducted on-site in February 2010. The EHD had approved this test in <br /> correspondence dated June 30, 2008. <br /> Three SVE wells were installed in July 2008, but multiple delays were encountered <br /> before the pilot test was completed. Conclusions included in the Report stated <br /> that soil vapor samples collected during the test indicated that total petroleum <br /> hydrocarbons as gasoline (TPHg) were detected at concentrations ranging from <br /> 24,000 to 28,000 micrograms per liter (ug/1) and that approximately 40 pounds of <br /> gasoline were removed during the test. The radius of influence of induced vacuum <br /> was out to 50 feet from the test well. AGE recommended that a remedial action <br /> work plan be prepared that includes an evaluation of corrective action alternatives <br /> to mitigate the residual low concentration impact to the groundwater. <br /> The EHD has reviewed the groundwater and soil data collected to date for this site <br /> and has concluded that a full remedial effort at the site now may be premature. <br /> The 8-hour SVE pilot test did indicate that a short termed SVE effort was effective, <br /> but in view of the generally fine-grained soil at the site and the significant diesel <br /> component, the EHD considers it prudent to show that continuous SVE (high or <br /> low vacuum) would be as effective. In order to determine this, the EHD <br /> recommends that an extended SVE pilot test be conducted on-site with a small, <br /> temporarily installed SVE system. If it can be shown that continuous SVE is as <br /> effective as the 8-hour test suggests, then the EHD will approve your consultant's <br /> recommendation to submit a remedial action work plan. <br />