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23 June 2000 <br /> AGE-NC Project No 98-0511 <br /> Page 3 of 8 <br /> investigation activities <br /> 32 SOIL SAMPLE COLLECTION AND ANALYSIS <br /> AGE proposes to advance four 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 in the area of the former USTs, a second boring will be <br /> advanced west of the former UST area, at the western edge of the property, a third boring will be <br /> advanced southwest of the former UST area, and a fourth boring will be advanced south of the <br /> former UST area, south of 7' street on the adjacent vacant lot <br /> Soil borings are proposed to be advanced to depths of approximately 27 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 boring at five-foot intervals from ground <br /> • surface to the total depth of the boring Field procedures for advancement of pilot bonngs and <br /> collection of soil samples are presented in Sections 4 1 <br /> It is proposed that up to twelve soil samples, three soil samples from each soil boring, will be <br /> submitted for laboratory analysis Selected soil samples will be analyzed by a California Department <br /> of Health 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 /> • Volatile aromatics benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl <br /> tert-butyl ether (MTBE) by EPA Method 8020, and <br /> • Fuel oxygenating compounds including MTBE, di-isopropyl ether (DIPS), ethyl tertiary- <br /> butyl ether(ETBE),tertiary-amyl methyl ether(TAME) and tertiary-Butanol (TBA)by EPA <br /> 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 /> Advanced GeoEnvxronmental,Inc <br />