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IT _ ' � -� - ` - ., _ •- - Ory V .- _ ' .. r� _ � r ._ _ <br />' 27 May 2004 <br /> i AGE-NC Project No 96-0254 <br />' Page 3 of 6 <br />' 2 4 , BACKFILLING OF EXCAVATION <br /> The excavation was backfilled using a combination of clean soil removed from the excavation,pea <br />' gravel and imported aggregate/based gravel <br />' 25 DISPOSAL OF HYDROCARBON-IMPACTED SOIL <br /> On 19 December 2003, approximately 486 tons of petroleum hydrocarbon-Impacted soil was <br /> transported to Forward Landfill in Manteca,California for disposal Landfill weight tags are included <br /> as Appendix B <br /> 3.0. FINDINGS <br /> t ` <br />' A discussion of laboratory and field results-of soil samples collected during excavation procedures <br /> as well as an estimated total mass of hydrocarbons removed is detailed below <br /> 3 1 ANALYTICAL RESULTS OF SOIL SAMPLES <br />' Five soil samples(EX1-N,EX1-E,EX1-S,EX1-W and FLR-01)`were collected from the sidewalls <br /> and floor of the former UST excavation In addition, five composite soil samples and five individual <br />' soil samples collected from the soil stockpile generated during excavation activities were submitted <br /> for laboratory analysis <br /> ' 3 1 1 Floor and Sidewall Samples - <br /> Fuel oxygenate MTBE was detected in sidewall soil samples EXI-E and EX1-S at concentration of <br />' 0 010 milligrams per kilogram (mg/kg) and 0 050 mg/kg, respectively Other target analytes were <br /> not detected in the two samples In addition, analytes of concern were not detected in sidewalls <br />' samples EX1-N and EX1-W and floor sample FLR-01 Analytical results of sidewall and floor <br /> samples are presented in Tables I and 2 The laboratory reports(CTEL Laboratory IDs 0312-074-1 <br /> through 0312-074-5) are included in Appendix C <br /> 1 T <br /> • Advanced GeoEnvironmental,Inc <br /> P <br />