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Field Observations <br /> The subsurface geology at this site was primarily composed of sand, silt and silty clay. <br /> Groundwater was not encountered although the soil was moist. Boring logs indicating <br /> subsurface lithology and boring details are included as an attachment to this report. <br /> An organic vapor analyzer (OVA) was used to conduct field screening for head space <br /> vapor concentrations and this information was recorded on boring logs. This information <br /> was used to select the samples with the greatest suspected concentrations for laboratory <br /> analysis. OVA concentrations ranged from 0 to 3.8 parts per million (ppm). No gasoline <br /> odor was detected in any borings. An active remediation system was installed on site, <br /> Laboratory Procedures and Results <br /> A total of 3 soil samples were submitted to a California-certified enviraownental <br /> laboratory for analysis. Select soil samples were analyzed using EPA Method 82606 for <br /> total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, <br /> xylenes (BTEX), and methyl tertiary butyl ether (MTBE) and oxygenates. The samples <br /> were also analyzed for total petroleum hydrocarbons as diesel (TPHd) using EPA Method <br /> 8015M. If TPHd was present in any of the samples, then the samples were also analyzed <br /> for polynuclear aromatic hydrocarbons (PAH) using EPA Method 8310. Groundwater <br /> samples were not collected at this site. All samples were stored in a cooler with ice and <br /> transported under chain of custody protocol. <br /> Soil samples were analyzed from borings 82, B3, and 85. The results of this sampling <br /> are included in Table 1 along with laboratory detection limits when non-detectable results <br /> were obtained. Laboratory reports, QA/QC data, and chain of custody documentation are <br /> attached to this report <br /> All of the soil borings analyzed showed non-detectable results for TPHg, TPHd, BTEX, <br /> MTBE,and oxygenates. <br /> Conclusions and Findings , <br /> Based on the soil analytical data collected, subsurface soils do not contain concentrations <br /> of hydrocarbons that exceed the State of California or local regulatory agency action <br /> guidelines. <br /> �5`Ot`fAt.ENS <br /> P <br /> Sincerely, <br /> � <br /> � <br /> acnes eegan,Civil CNI1. <br /> FC <br /> 2 <br />