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21 December 1998 <br /> AGE-NC Project No. 98-0533 <br /> Page 3 of 5 <br /> permitting, a health and safety plan will be prepared in accordance with Occupational Safety and <br /> Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational <br /> Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, <br /> 1985). Prior to mobilization,each soil probe location will be clearly marked and an utility clearance <br /> obtained through Underground Service Alert. <br /> 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> Initially,AGE proposes to advance five vertical or angled(where feasible) soil probe borings in the <br /> vicinity of the USTs system to evaluate if petroleum hydrocarbons have impacted soil and/or ground <br /> water. Proposed probe boring locations are illustrated in Figure 2. Each probe boring will be <br /> advanced to a total vertical depth of 20 feet below surface grade (bsg). Probe borings may be <br /> advanced to greater depths or additional borings may advanced based upon field observations. Probe <br /> borings will be advanced using a Geoprobe soil probing unit. Soil samples will be collected at depths <br /> of 10, 15 and 20 feet bsg. If ground water is encountered, grab samples will be collected from <br /> selected probe borings. <br /> Field procedures for advancement of probe borings and collection of soil samples are presented in <br /> Section 4.2. It is anticipated that two soil samples from each probe boring will be submitted for <br /> laboratory analysis. <br /> Selected soil samples will be analyzed by a State of California Department of Health Services(DHS) <br /> -certified laboratory for the following constituents: <br /> • Total petroleum hydrocarbons quantified as aviation fuel (TPH-av) by EPA Method 8015 <br /> Modified; and <br /> • Benzene, toluene, ethyl benzene and xylenes (BTEX)by EPA Method 8020. <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. REPORT PREPARATION <br /> Upon completion of field work and receipt of final laboratory analysis, a report will be prepared <br /> presenting the findings of the investigation. The report will include a description of the work <br /> performed and results of the sampling and analysis. Conclusions and applicable recommendations <br /> Advanced GeoEnvironmental,Inc. <br />