Laserfiche WebLink
lr�) r FILE COPY <br /> PUBLIC HLALTH SER"'IllIvICES <br /> SAN JOAQUIN COUNTY F <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 'Foo <br /> 209/468-3420 <br /> MICHAEL BRITTON OCT 2 4 ZOM <br /> CITY OF MANTECA <br /> 1001 W CENTER ST <br /> MANTECA CA 95336 <br /> RE: City of Manteca Corp Yard SITE CODE: 0690 <br /> 210 E. Wetmore <br /> Manteca CA 95336 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the <br /> Preliminary Investigation and Evaluation Report dated October 12, 2000 that was prepared by Advanced <br /> GeoEnvironmental, Inc. (AGE)for the above referenced site and has the following comments. <br /> The report documents fieldwork that took place on March 20, 2000, when three soil borings were <br /> advanced to a depth of 25 feet below surface grade (bsg)far the purpose of collecting soil and grab <br /> groundwater samples for analysis. Results of the analyses indicate that groundwater in the vicinity of the <br /> former underground fuel tanks has been impacted with petroleum hydrocarbons and fuel oxygenate <br /> additives, and that the extent of the contaminant plume has not been defined. The water sample from <br /> boring B-1 had 430 micrograms per liter(µg11) methyl tertia Iy butyl ether (MtBE), 28 µg11 benzene, 110 <br /> µg11 total petroleum hydrocarbons as gasoline (TPHg)and 400 µg11 of tertiary butyl alcohol (TBA). The <br /> water sample from boring B-2 had 10,000 µg11 MtBE, 310 µg11 benzene and 1,200 µg11 TPHg. The water <br /> sample from boring B-3 had 67 µg11 MtBE. One soil sample, the 20-foot sample from boring B-2, had 1.6 <br /> milligrams per kilogram of MtBE, This was the only positive analytical result from a soil sample. <br /> The report states that the State of California Department of Health Services (DHS)adopted a <br /> concentration of 13 µg11 as an action level for MtBE in March 1999. Please note that in May 2000 the <br /> DHS approved the adoption of the primary maximum conta inapt level of 13 µg/l for MtBE. The DHS <br /> has established 12 µg11 as an action level for TBA. <br /> The report recommends the installation of soil borings and monitoring wells to further assess the <br /> horizontal extent of impacted soil, the horizontal and vertical extent of impacted groundwater and to <br /> monitor the groundwater contaminant plume. PHSIEHD agrees with this recommendation, Prepare a <br /> work plan to continue the investigation of the vertical and lateral extent of the documented petroleum <br /> hydrocarbon contamination at this site. Submit the work plan to PHSIEHD by December 1, 2000. If you <br /> have any questions or comments please call Lori Duncan at(209)468-Q337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> +,C7 <br /> CA, <br /> Lori Duncan, Senior REHS Dot Lofstrom, RG <br /> LOP/Site Mitigation Unit IV Engineering Geologist <br /> cc: Marty Hartzell, CVRWQCB <br /> Brian Millman, AGE <br /> Jeff Southern, California Hazardous Services <br /> A Division of San Joaquin County Health Care Services <br />