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10 October 1999 <br /> AGE-NC Project No. 99-0559 <br /> Page 3 of 8 <br /> 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> AGE proposes to advance three pilot borings, for the purpose of monitoring wells, in the vicinity of <br /> _ the former UST area to evaluate the lateral and vertical extent of the petroleum hydrocarbon <br /> impacted soil and ground water. Proposed well locations are illustrated in Figure 2. <br /> _ One pilot boring is proposed to be advanced northwest of the former UST area; a second boring will <br /> be advanced northeast of the former UST area; and a third boring will be advanced south of the <br /> former UST area. <br /> Soil borings are proposed to be advanced to depths of approximately 25 feet bsg, approximately 15 <br /> feet below current ground water levels. However, total depths of borings will be based on field/." <br /> observations. Soil samples will be collected from each probe boring at five-foot intervals from <br /> ground surface to the total depth of the boring. Field procedures for advancement of pilot borings <br /> and collection of soil samples are presented in Sections 4.1. <br /> It is proposed that up to six soil samples, two soil samples from each soil boring, will be submitted <br /> — for laboratory analysis. Selected soil samples will be analyzed by a California Department of Health <br /> Services (DHS)-certified laboratory for the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Method 8015 <br /> Modified/5030; <br /> • Total petroleum hydrocarbons quantified as diesel (TPH-d) by EPA Method 8015 <br /> Modified/3550; <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl Cert-butyl ether <br /> -• (MTBE) by EPA Method 8020; and <br /> • Fuel oxygenating compounds including methyl tert-butyl ether (MTBE), di-isopropyl ether <br /> _ (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME) and TBA by <br /> EPA Method 8260. <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> _ findings and recommendations. <br /> 3.3. 1N-SITU GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> During the soil boring activities, grab ground water samples will be collected from each of the soil <br /> Advanced GcoEn ironmewal,Inc. <br />