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05 February 2018 <br />AGE Project No. 18-4300 <br />Page 2 of 4 <br />2.2. SOIL PROBE BORINGS AND SAMPLING <br />A total of two (2) soil borings are proposed near the onsite septic system, in a southwest <br />section of the property (Figure 2). <br />Generally, soil samples will be collected from each boring at 5, 10 and 15 feet below <br />surface grade (bsg). If no field evidence of petroleum hydrocarbon impact is <br />encountered from the soil samples, the boring will be terminated at a depth of 15 feet <br />below surface grade (bsg). Field personnel may adjust the frequency and method of <br />sampling in consultation with an AGE Professional Geologist. <br />Procedures for advancement of soil borings and sampling are presented in Section 3.0. <br />2.3. LABORATORY ANALYSIS <br />Selected soil samples will be analyzed by a California Department of Public Health <br />(CDPH)-certified laboratory for the following constituents: <br />Total Petroleum Hydrocarbons (gasoline, diesel, motor oil) by EPA Method <br />8015M; and <br />Volatile organic compounds (VOCs) in accordance with EPA Method 8260B. <br />Laboratory reports for soil sample and groundwater analyses, testing methods, <br />laboratory quality assurance/quality control (QA/QC) reports, and sample chain-of- <br />custody documentation will be presented in a report with the findings and <br />recommendations. <br />2.4. REPORT PREPARATION <br />Upon completion of initial field work and receipt of final laboratory analysis, a report will <br />be prepared presenting findings of the investigation. The report of findings will include <br />descriptions of work performed and results of sampling and analysis. Also, conclusions <br />and applicable recommendations will be included in the report. Reports will be reviewed <br />and signed by a California Professional Geologist. <br />3.0. FIELD PROCEDURES <br />All field procedures will be overseen by an AGE representative working under the <br />supervision of a California Professional Geologist. Procedures for advancing the soil <br />boring, collection and analysis of soil samples, equipment decontamination and sample <br />handling are presented below. <br />Advanced GeoEnvironmental, Inc.