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w. %%04 <br /> +r Site Background Information: Sarale Farms <br /> Page 3 of 5 <br /> L. <br /> Dark gray, saturated silty clay or clayey silt and sandy silt or silty sand were encountered at <br /> 15 feet bsg to 20 feet bsg. <br /> tr <br /> Target analytes were detected in soil samples collected from borings MW-1 through MW-3. The <br /> LW lateral and vertical extents of petroleum hydrocarbon-impacted soil have not been defined. <br /> • The highest concentrations of dissolved hydrocarbons occurred in monitoring well MW-1, <br /> located adjacent to the former fuel pipeline. <br /> Analytical results of soil samples are provided in Table 2 of this appendix. <br /> 4 <br /> On 31 August and 01 and 02 September 2005,five paired soil borings(CPT-1 through CPT-5)were <br /> advanced on- and off-site to total depths between 85 feet and 100 feet bsg. A total of fifteen grab <br /> ground water samples were collected and submitted for laboratory analysis. TPH-g was detected in <br /> all three samples collected from boring CPT-2 (CPT2-33, CPT2-52, and CPT2-79) at concentrations <br /> of 120 pg/l, 220 gg/1, and 110 gg/l, respectively. BTEX compounds were detected in all three <br /> samples collected from boring CPT-2 at maximum concentrations in sample CPT2-52 of 31 µg/1 <br /> benzene, 89µg/1 toluene, 8.6 gg/l ethylbenzene,and 48µg/1 total xylenes.A total of six soil samples <br /> were collected from borings CPT-1 through CPT-5 and analyzed for petroleum hydrocarbon <br /> constituents. Toluene and xylenes were detected in sample CPT2-49 at concentrations of0.011 gg/l <br /> and 0.010 µg11, respectively. Analytical results of CPT grab ground water and soil samples are <br /> included in Tables 3 and 4 of this appendix. <br /> STRATIGRAPHY <br /> Generally, moist, black clayey peat was found from surface grade to approximately 4 feet bsg <br />#„• throughout the site. From 4 feet to approximately 20 feet bsg, clay, clayey silt, and silty clay were <br /> encountered. A layer of silty sand and sand, generally sandwiched between 1-foot thick layers of <br /> silt and sandy silt,was identified to approximately 40 feet bsg on the north and east portions of the <br /> AW site, and thinning to approximately 33 feet bsg on the south and west portions. Beneath the sandy <br /> layer, clay, silty clay, and clayey silt were encountered to approximately 50 feet bsg. Three <br /> additional sandy units,ranging in thickness between 5 feet and 10 feet on the north and east portions <br />�• of the site to 1 foot to 10 feet on the east and south portions of the site, were encountered to <br /> approximately 90 feet bsg. Each sandy unit was separated by a layer of silty and clayey material <br /> ranging in thickness from approximately 2 feet to 10 feet. The deepest sandy unit does not extend <br />+� to the southern and westernmost portions of the site. Silt, sandy silt, clayey silt, and silty clay were <br /> encountered from approximately 80 feet to 90 feet bsg to the total depth of the borings. <br />:i. <br /> Advanced GeoEn%ironmental,Inc. <br /> r <br />