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r <br /> File No. NFE-4463-04 Doc. No. 9908-085 <br /> LAugust 23, 1999 <br /> L <br /> Analytical Methods <br /> C The soil samples collected from borings EB2 and E133 were delivered to Chromalab in Pleasanton, <br /> L California (FLAP #1094) and analyzed for total extractable petroleum hydrocarbons (TEPH) as <br /> diesel, motor oil, and crude oil using EPA modified method 8015 and benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) using EPA method 8020. Samples were also sent by <br /> overnight delivery, under chain of custody protocol, to Friedman and Bruya (F&B) in Seattle, <br /> Washington (FLAP #1727) and analyzed for polynuclear aromatic hydrocarbons (PNAs) using <br /> EPA method 8270 SIM. <br /> Analytical Results <br /> The soil sample collected at a depth of 11 feet bgs from EB2 contained the following: <br /> 310 parts per million (ppm) TEPH as crude oil (based on the response factor of diesel) <br /> ° 0.063 ppm acenaphthene <br /> 0.120 ppm chrysene <br /> ° 0.490 ppm fluorene <br /> ° 1.1 ppm napthalene <br /> r ° 1.0 ppm phenanthrene <br /> L 0.078 ppm pyrene <br /> All other analytes were below detection limits. However, the detection limits for the PNAs were <br /> raised due to high levels of material. <br /> The samples collected at depths of 9.5 and 10.5 feet bars from EB3 contained the following: <br /> ° 1,900 ppm TEPH as crude oil (based on the response factor of diesel) <br /> 0.570 ppm acenaphthene <br /> r 0.180 ppm benz(a)anthracene <br /> 1.0 ppm chrysene <br /> ° 2.1 ppm fluorene <br /> ° 0.780 ppm pyrene <br /> All other analytes were below detection limits. However, the detection limits for all analytes were <br /> raised due to high levels of material. A summary of the analytical results is presented in Table 1. <br /> Conclusions <br /> Hydrocarbon concentrations were encountered in two of the six borings within the existing right- <br /> of-way south of Old Byron Road. The laboratory report indicated TEPH as crude oil in <br /> concentrations of 310 ppm in boring EB2 and 1900 ppm in boring EB3. The areas that contain <br /> residual hydrocarbons in soil are located in the vicinity of the proposed alley near the hardware <br /> store loading dock and pickup/receiving area and near the "Major 2" building. <br /> Earth Systems Consultants Northern California 2 <br /> I <br />