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SAIC <br /> RECE m ED <br /> August 10, 2012 AUG 13 Z01Z <br /> San Joaquin County Environmental Health Department <br /> Site Mitigation Program ENVIRONMENTALHEALTt� <br /> 1868 East Hazelton Avenue PERMIT/SERVICES <br /> Stockton,California 95205 <br /> Subject: Boring Permit Application,Ahern Road—Vernalis,San Joaquin County, CA <br /> To Whom It May Concern: <br /> SAIC Energy,Environment and Infrastructure,LLC(SAIC) is submitting the attached boring <br /> permit application and supporting documentation for the advancement of three soil borings at the <br /> Ahern Road—Vernalis site in Vernalis,California. The investigation is being conducted on <br /> behalf of Chevron Environmental Management Company(CEMC). <br /> The proposed step-out investigation is a continuation of fieldwork described in the SAIC Revised <br /> Soil and Groundwater Investigation Work Plan (SAIC 2011; see attached), which was approved <br /> by the Central Valley Regional Water Quality Control Board(RWQCB) in a letter dated <br /> December 8, 2011 (see attached). SAIC advanced the originally proposed borings (SBA, SB-2, <br /> and SB-3 on the attached figure) in February and March 2012, but failed to achieve lateral <br /> delineation of affected soil and groundwater. <br /> The soil and groundwater investigation fieldwork has been tentatively scheduled for the week of <br /> September 10, 2012. SAIC will confirm field dates with SJCEHD at least 48-hours prior to the <br /> initiation of fieldwork. Please contact me by phone(510-825-8519) or e-mail <br /> (gehlkes@saic.com), if you have any questions. <br /> Sincerely, <br /> SAIC Energy, Environment & Infrastructure, LLC <br /> "�_ -14/k <br /> Sean Gehlke <br /> Project Geologist <br /> Enclosures: <br /> Well Permit Application &LCD Form Site Access Agreement <br /> MFR form SAIC Work Plan dated November 28, 2011 <br /> Location Map RWQCB Letter dated December 8, 2011 <br /> Payment Receipt in the amount of$500.00 <br /> SAIC Energy,Environment&Infrastructure,LLC <br /> 1000 Broadway I Suite#675 1 Oakland, CA 946071 1 tel: (510)466-7100 1 fax: (510)446-7919 1 saic.com\eeandi <br />