Laserfiche WebLink
San Joaquin County DIRECTOR <br /> POu'N Environmental Health Department Donna Heran, REHS <br /> �o._ .co ASSISTANT DIRECTOR <br /> z 600 East Main Street Laurie Cotulla, REHS <br /> Q: <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> ..� <br /> Carl Borgman, REHS <br /> P Website: www.s ov.or ehd Mike Huggins, REHS, RDI <br /> 4�iFOR� jg / <br /> g Margaret Lagorio, REHS <br /> Phone: (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209) 464-0138 Jeff Carruesco,REHS, RDI <br /> Kasey Foley, REHS <br /> August 27, 2008 <br /> Linda Migliori <br /> 2881 N. Arata Rd <br /> Stockton, CA 95215 <br /> Subject: Three Palms Grocery SITE CODE: 1830 <br /> 6732 Hwy 88 <br /> Stockton, CA <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed "Corrective <br /> Action Plan Addendum Three Palms Grocery" (CAP Addendum) dated July 30, 2008, and "Third <br /> Quarter 2008 Groundwater Monitoring Report" (Report) dated August 15, 2008, prepared by <br /> ATC Associates Inc. for the above subject site and provides the following comments. <br /> The Background Information in the CAP Addendum has been corrected and reflects that there are <br /> no operating tanks at this site. The CAP Addendum discussed soil remedial alternatives of natural <br /> attenuation, vapor extraction (VE) and excavation, provided estimated costs and limitations of the <br /> alternatives and recommended vapor extraction. <br /> The CAP Addendum discussed groundwater remedial alternatives of pump and treat, in-situ <br /> oxidation, in-situ air sparging and natural attenuation, provided estimated costs and limitations of <br /> the alternatives and recommended natural attenuation. <br /> The CAP Addendum provided cleanup goals for soil and groundwater. The numerical objectives in <br /> the Central Valley Regional Water Quality Control Board water quality control plan for the <br /> Sacramento and San Joaquin River Basins were used as clean up goals for water. The cleanup <br /> goals provided for soil were USEPA Region 9 PRG's. There are no goals for total petroleum <br /> hydrocarbons as gasoline (TPHg) or 1,2 DCA. The only soil samples that had concentrations of <br /> contaminants that exceed the USEPA Region 9 PRG's were collected from borings S131, SB2, and <br /> VW4. These borings are all next to the former leaking underground storage tanks 1, 3 and 4. Soil <br /> cleanup must be protective of water quality. Currently, the contaminants leaching to the <br /> groundwater are TPHg and 1,2 DCA. Vapor samples will be used to evaluate the necessity for <br /> continuing to operate the vapor extraction system. <br /> The CAP Addendum discusses installation of up to five additional VE wells without providing <br /> technical justification for the wells. Vapor extraction well VW4 had a radius of influence of up to 60 <br /> feet according to the CAP Addendum and the highest concentrations of soil contamination are <br /> within 60 radial feet of VW4. The CAP Addendum also discusses utilizing VW 1, VW2 and VW3. <br /> The VE test on theses wells indicated they were not effective. <br />