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Field Investigation: <br /> ENCON executed the following activities during the onsite site investigation conducted on November 26"' <br /> 2013: <br /> ■ Advanced eight (8) soil borings (SB-1 through SB-8) to a maximum target depth of 20 feet bgs in <br /> the areas of potential environmental concern including the current automotive service areas and <br /> past auto repair/service areas. (Refer to Figure 2; Boring Location Map) <br /> ■ Recorded pertinent information such as soil lithology, condition of the samples, and the time of <br /> each collected sample on appropriate boring log forms. <br /> ■ Submitted selected soil samples for laboratory chemical analysis of RCRA Metals via EPA <br /> Method 6010B / 7471A, VOCs (volatile organic compounds), TPH-GROs (total petroleum <br /> hydrocarbons as gasoline range organics), TPH-DROs (total petroleum hydrocarbons as diesel <br /> range organics), TPH-OROs (total petroleum hydrocarbons as oil) using EPA Method 8105, and <br /> BTEX (benzene, toluene, ethylbenzene, and total xylenes), and MTBE (methyl tertiary butyl <br /> ether)via EPA Method 8260B. <br /> All samples were submitted to a State of California Certified Laboratory using Chain of Custody Protocols, <br /> for regular turnaround. <br /> Data Evaluation and Reporting: <br /> ENCON evaluated the historic and current site use, the current analytical data, and prepared maps, <br /> documented the methods used, and presented the results and conclusions for this limited site <br /> assessment. <br /> Encon Solutions, Inc. <br /> -6- <br />