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r <br /> Ripon Farm Service <br /> 932 Frontage Road Page 2 <br /> Ripon, California 95366 December 13, 2010 <br /> EHD of pending fieldwork at least a week prior to the scheduled date and submit the soil gas ` <br /> results to the EHD by 23 February 2011. <br /> By letter dated 03 March 2010, the EHD requested a technical justification, supported by <br /> authoritative guidance, for the methodology used to enter the.soil gas data for total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g) .into. the !Johnson and Ettinger Model to <br /> determine the potential risk posed by soil gas intrusion into'buildings at your site. To date, the <br /> .EHD has not received a response to this request. Submit 2'this information to the EHD within <br /> 30 days of the date of this letter to validate the results from the model and' move this site <br /> toward closure. <br /> If you have any questions concerning this letter, please contact Vicki.McCartney at (209) 468- <br /> 9852, or by email at vmccartney@sjcehd.com. <br /> Sincerely, <br /> CN <br /> Victoria L. <br /> McCartney, REH <br /> S <br /> Nuel C. Henderson, Jr. PG <br /> Senior Registered Environmental Health S ecialist Engineering Geologist <br /> c: Mr. William R. Little, PG, Advanced GeoEnvironmental, Inc. 837 Shaw Road, Stockton, <br /> California 95215 <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 /> I' <br /> k.. <br />