Laserfiche WebLink
26 February 2015 • • <br /> AGE Project No. 15-3325 <br /> Page 2 of 4 <br /> historical Sanborn Maps indicate that a Standard Oil facility was located immediately <br /> south of the property between 1895 and 1972. <br /> To determine if hydrocarbons from the former subject property USTs or the Standard Oil <br /> facility have impacted the subject property, four soil borings will be advanced in the area <br /> of the former USTs and two soil vapor probes will be advanced along the property line <br /> between the subject property and the Standard Oil facility. <br /> SCOPE OF WORK <br /> Following pre-fieldwork activities (including performance of a geophysical survey, and <br /> marking boring locations and notification of Underground Service Alert), four (4) soil <br /> borings will be advanced within the former location of the USTs to a total depth of <br /> 20 feet below surface grade (bsg) for collection of soil samples at the site. Additionally, <br /> two (2) soil vapor probes will be advanced to depths of 7 to 8 feet bsg along the <br /> southern property boundary, for the collection of soil vapor samples. Approximate <br /> boring locations are illustrated in Figure 2 and are subject to change. <br /> Upon completion of the field work and receipt of laboratory analysis, a brief report will <br /> be prepared. The report will be reviewed and signed by a California Professional <br /> Geologist. <br /> PROBE BORING ADVANCEMENT <br /> Probe borings will be advanced using a using a GeoProbe® or PowerProbe® direct- <br /> push unit equipped with 1.25-inch probing rods. The probe unit advances soil borings <br /> using a hydraulic hammer to drive soil sampling tools to specified depths. <br /> SOIL SAMPLE COLLECTION AND ANALYSIS <br /> Soil samples may will be collected at discreet 10-foot intervals using a 1.25-inch <br /> Geoprobe& soil sampling assembly loaded with four six-inch stainless steel sleeves or <br /> one 2-foot acetate liner. Upon sample retrieval, the ends of the second sleeve or <br /> portions of the acetate liner will be covered with Teflon® sheets, capped and sealed <br /> with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice <br /> and transported under chain-of-custody procedure to a California Department of Public <br /> Health (CDPH)-Certified laboratory. Selected soil samples collected from the vicinity of <br /> the former underground storage tank (4 borings) will be analyzed for total petroleum <br /> hydrocarbons (TPH) - full scan and volatile organic compounds (VOCs) with fuel <br /> oxygenates in accordance with EPA method 8015m and 82608, respectively <br /> Advanced GeoEnvironmental,Inc. <br />