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i • <br /> KL E/NFEL DER <br /> Bright People.Fight Solutions. <br /> April 16, 2013 <br /> Project Number: 131248 <br /> Costco Wholesale <br /> c/o Jones Covey Group <br /> 9595 Lucas Ranch Road <br /> Rancho Cucamonga, CA 91730 <br /> Attention: Walter Friesen <br /> Subject: Transmittal of Soil Characterization Results <br /> Proposed Fuel Additive Underground Storage Tank Site <br /> Costco Wholesale Warehouse No. 658 <br /> 3250 West Grantline Road, Tracy, California <br /> Dear Mr. Friesen: <br /> This letter transmits results of soil sampling performed by Kleinfelder for Costco Wholesale <br /> Corporation (Costco) at the location of a proposed fuel additive underground storage tank (UST) <br /> to be installed at Costco's existing Warehouse No. 658 facility (see Site Plan provided in <br /> Attachment A) at the address indicated above. The purpose of the sampling was to obtain soil <br /> characterization data for use by the Jones Covey Group in facilitating disposal of soil that will be <br /> excavated during UST installation. Work was performed under an approved San Joaquin <br /> County Environmental Health Department permit dated April 3, 2013 (Attachment B). Pertinent <br /> information is summarized below and in Attachments A through E. <br /> FIELD ACTIVITIES SUMMARY <br /> Date Drilled/Sampled: April 11, 2013 <br /> Driller: Vironex, Inc. (C-57 License#705927) <br /> Number of Bores: One(Bore B-1; see location on Site Plan in Attachment A) <br /> Bore Type: Hand auger/direct-push <br /> Number of Soil Samples: Three discrete soil samples <br /> Sample Depths 2 feet, 5 feet, and 8 feet bgs; 2-foot bgs soil sample collected using a <br /> (below ground surface [bgs]): hand auger and placed into two 4-ounce glass jars; 5-and 8-foot bgs soil <br /> samples collected in polycarbonate sleeves using a direct-push sampler <br /> Photoionization Detector 0.0 part per million by volume (ppmv)to 0.5 ppmv <br /> (PID) Readings: <br /> Soil Description: See log for Bore B-1 provided in Attachment C <br /> 131248/IRV13L0273 Page 1 of 2 April 16, 2013 <br /> copyright 2013 Kleinfelder <br /> 2 Ada, Suite 250, Irvine,CA 92618 p 1949.727.4466 f 1949.727.9242 <br />