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California Re nal Water Quality Cntrol Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Winston H. Hickox Gray Davis <br /> —' 'I <br /> Secretaryfor Sacramento Main Office Governor <br /> ` _�._; <br /> Environmental Internet Address: http://www.sweb.ca.gov/r%Vqc <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 9587 03 O �oo� <br /> Phone(916)255-3000•FAX(916)255-3015 �J <br /> 9 December 2002 <br /> ENVIRONMENT HEALTH <br /> Mr.Brad Frahm PERMIT/SERVICES <br /> 5835 East Cherokee Road#98 <br /> Stockton, CA 95215 <br /> WORKPLANAPPROVAL, FORMER SIEBOLD CONSTRUCTION, 820 SOUTHAMERICANSTREET, <br /> STOCKTON,SAN JOA Q UIN CO UNTY <br /> Board staff reviewed your 26 September 2002 plan of work to complete four push probe soil borings and collect <br /> soil and groundwater samples at the subject site. The four proposed soil borings will be located 30 to 90 feet <br /> from the former 2,000-gallon gasoline underground storage tank(UST) area, and completed to 40 feet below <br /> ground surface. Soil and groundwater samples will be analyzed for total petroleum hydrocarbons as gasoline <br /> (TPHg),total petroleum hydrocarbons as diesel (TPHd),benzene,toluene, ethyl benzene, and xylenes (BTEX), <br /> and fuel oxygenates and additives including MtBE and 1,2-dichloroethane. <br /> The soil and groundwater assessment workplan is approved with the following revisions: <br /> 1. We reviewed groundwater monitoring reports for two UST sites within one-half mile of your site, and <br /> identified that the depth to water is approximately 34 feet and the dominant groundwater flow direction is to <br /> the southeast. Therefore, we believe that instead of four push probe borings,two push probe borings would <br /> be adequate. The push probe locations should be adjusted as shown on Attachment A to be closer to the <br /> former 2,000-gallon UST area. <br /> 2. Starting at 10 feet below ground surface, collect soil samples from the two push probe borings every five feet <br /> or at changes in lithology to first encountered groundwater. Collect a groundwater grab sample from the two <br /> push probe boring locations at the completion of the boring. Analyze soil and groundwater samples for <br /> TPHg,TPHg, BTEX, and fuel oxygenates and additives. Ethanol and methanol analysis are not required. <br /> 3. Purge and sample the existing on-site monitoring well, and analyze the water sample for constituents listed <br /> above. <br /> hi the future, only one copy of workplans and drawings are required to be submitted. If you have any questions <br /> or comments,please c Il®�255-3115. <br /> Marty Haftell,R.G. <br /> Associate Engineering Geologist <br /> cc: Mr.Mark Owens, SWRCB Cleanup Fund, Sacramento <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Division, Stockton <br /> California Environmental Protection Agency <br /> 0%Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and out your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5 <br />