Laserfiche WebLink
Former J. M. Equipmenl Company Page 2 of 2 <br /> 1245 West Charter Wa March 25, 2013 <br /> Stockton, California 9506 <br /> I <br /> than 100 mg/kg of total petroleum hydrocarbons as gasoline; therefore, the benzene <br /> concentrations in groundwater, currently at approximately 12.5 feet bsg, may pose a <br /> vapor intrusion hazard or risk. These significant concentrations of benzene in soil, and <br /> the lack of soil gas data, indicate a need to complete a human health risk assessment as <br /> well as a vapor intrusion evaluation. <br /> On 18 January 2013, the EHD posted public notification of pending approval by this department <br /> of the Corrective Action Plan (CAP) to implement additional remediation submitted by <br /> Geological Technics Inc.; and by letter dated 31 January 2013, the EHD approved the CAP, <br /> contingent on responses from the public. The EHD has received no comments from the public; <br /> therefore, you may proceed with the implementation of the CAP. <br /> The EHD suggests that soil samples be collected at five feet bsg, in addition to the proposed ten <br /> and twenty feet bsg collection of soil samples for field observation and chemical analysis for <br /> total petroleum hydrocarbons as gasoline (TPH-g) and benzene, toluene, ethylbenzene and <br /> total xylenes (BTEX) during the advancement of the initial boreholes during installation of <br /> proposed injection and monitoring wells. This additional soil data can be used to complete a <br /> human health risk assessment and assess the need to collect soil gas samples for vapor <br /> intrusion evaluation. <br /> Please submit a Well and Boring Permit Application, Master File Record form, and <br /> installation/inspection fees to the EHD for the installation of the ten injection wells and three <br /> monitoring wells, and complete the well installations by 31 May 2013. <br /> If you have any questions, please contact Vicki McCartney at (209) 468-9852 or by e-mail at <br /> vmccartney(d)sicehd.com. <br /> �Sincerely, <br /> _ / <br /> Victoria L. McCartney, REHS"IJ Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Mr. Raynold I. Kablanow II, Ph.D., PE, Ground Zero Analysis, Inc., 1172 Kansas <br /> Avenue, Modesto, California 95351-1526 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />