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San Joaquin County <br /> " .� Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> 600 East Main Street <br /> a: -A PROGRAM COORDINATORS <br /> W �j��lst r� r" :{ Stockton, California 95202-3029 Robert McClellon, REHS <br /> �. — - -- -- - Jeff Carruesco,REHS, RDI <br /> Cq ..•�... �j�P Website: www.sjgov.org/ehd Kasey Foley. REHS <br /> IF:OF <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> May 11, 2010 <br /> Mr. Weldon Church <br /> 1958 Yosemite Road <br /> Berkeley, California 94707 <br /> Subject: Weldon Church Property <br /> 104 West Beverly Place <br /> Tracy, California 95376 <br /> Dear Mr. Church: <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed In-situ <br /> Chemical Oxidation Pilot Test Work Plan Addendum, dated April 8, 2010, prepared and <br /> submitted by Advanced GeoEnvironmental, Inc. (AGE) on your behalf for the above- <br /> referenced site. In the addendum, AGE proposes to advance two injection test borings at <br /> locations illustrated on Figure 1 to perform a preliminary aquifer volurne test. AGE believes <br /> the lithology in this southern portion of the site is similar to the lithology in the proposed <br /> treatment area, and the locations are outside of the petroleum hydrocarbon contaminant <br /> area up-gradient of the former underground storage tank site. <br /> The EHD has reviewed the boring logs for soil borings B16 and MW-2 and believes the two <br /> proposed borings should be relocated closer to monitoring well MW-2 since the lithology for <br /> this borehole more closely resembles the lithology in the proposed treatment area as <br /> compared to the lithology of soil boring B16. Continuously core the two proposed borings to <br /> compare and confirm similar lithologies. <br /> The EHD approves the In-situ Chemical Oxidation Pilot Test Work Plan Addendum with <br /> these revisions. Please submit a boring permit application and permit/inspection fee of $434 <br /> to the EHD and complete the fieldwork by July 30, 2010. Notify the EHD of pending <br /> fieldwork at least a week prior to the scheduled event. <br /> If you have any questions concerning this letter, please contact Vicki McCartney at (209) <br /> 468-9852, or by email at vmccartney@sjcehd.com. <br /> Sincerely, <br /> i� <br /> Victoria L. McCartney, REHS Nuel C., Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br />