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10 June 2019 Advanced, <br /> AGE Project No. 19-4705 E n v i ro n men t a l <br /> Page 3 of 6 <br /> Laboratory reports for soil sample and water analyses, testing methods, laboratory <br /> quality assurance/quality control (QA/QC) reports, and sample chain-of-custody <br /> documentation will be presented in a report with the findings and recommendations. <br /> 2.3. SOIL-VAPOR SAMPLING & ANALYSIS <br /> To evaluate vapor intrusion risk to the site building a total of two (2) borings will be <br /> advanced at each end of the suspected tank area.. Borings will be advanced to total <br /> depths of 6.5 feet bsg. Semi-permanent soil-vapor sampling wells will be installed and <br /> then later sampled following a minimum two-hour stabilization period. Procedures for <br /> installation and sampling of the proposed soil-vapor sampling wells are provided in <br /> Section 3.3. Proposed boring locations are illustrated in Figure 2. <br /> 2.4. REPORT PREPARATION <br /> Upon completion of field work and receipt of final laboratory analysis, a report will be <br /> prepared presenting the findings of the investigation. The report will include a <br /> description of the work performed and results of the sampling and analysis. <br /> Conclusions, applicable recommendations and maps will be included in the report. The <br /> report will be reviewed and signed by a California Professional Geologist. <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of <br /> a California Professional Geologist. Procedures for the advancement of the soil borings <br /> and soil-vapor sampling well installation and sampling are outlined below. <br /> 3.1. SOIL BORING ADVANCEMENT AND SOIL SAMPLING <br /> Soil borings will be advanced using a van mounted Geoprobe 5400 direct-push probing <br /> unit equipped with 1.25-inch probing rods. The Geoprobe advances soil probe borings <br /> using a hydraulic hammer to drive soil and groundwater sampling tools to specified <br /> depths. Borings for soil-vapor sample collection will be advanced utilizing a four-inch <br /> diameter hand auger. <br /> Soil samples will be collected for laboratory analysis from the proposed boring during <br /> the investigation. Soil samples will be collected at discrete five-foot intervals at five and <br /> ten feet bsg using a 1.25-inch Geoprobe soil sampling assembly loaded with a two-foot <br /> acetate liner. <br />