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i ! . 03 November 2003 AGE-NC Project No 03-1055 Page 3 of 6 TPH-g and various BTEX compounds were detected in the grab ground water samples collected from the site Benzene concentrations exceed the State of California,Department of Health Services action level for drinking water in samples collected from boring B2, B3 and B4 The hydrocarbon plume has not been defined with the sample locations 2 4 SOIL EXCAVATION AND UST REMOVAL On the 23 October 2000 hydrocarbon-impacted soil was removed with an excavator and 2 45 cubic- yard bucket Soil was excavated from the northern most dispenser near soil probe boring B-3 Soil was stockpiled immediately on the eastern edge of the site Excavated soil was field screened for the presence of volatile organic compounds using an OVM Ground water was present within the limits of the excavation at a depth of 15 feet bsg Saturated soil was excavated from below the water table and stockpiled on site within a soil containment berm Soil was placed on plastic sheeting for temporary storage The open excavation area was surrounded by caution fencing No AGE or subcontractor personnel was allowed into the • excavation On the 20 and 21 October 2003 hydrocarbon impacted soil was removed with an excavator and 2 45 cubic-yard bucket Soil was excavated from north of the former excavation During the excavation the western and southwestern walls of the excavation collapsed During the clean up of the collapsed soil, the excavator impaled a 500 gallon UST which was inadvertently removed as a result of the impalement Under the direction of SJCEHD, AGE placed the UST on plastic sheeting within the contaminated soil stockpile for temporary storage The open excavation area is surrounded by fencing No AGE or subcontractor personnel was allowed into the excavation A UST removal permit package was completed and submitted to the SJCEHD for approval Upon approval of the removal permit, representatives of AGE returned to the site to witness the rinsing and removal of the UST Four soil samples and one grab ground water sample were collected from the excavation at the direction of SJCEHD personnel Field observations indicated that all soil samples were hydrocarbon-impacted A report of the UST removal will be prepared upon receipt of final laboratory analytical report 3.0. SCOPE OF WORK Based upon visual observations ofhydrocarbon stained soil seen during the October 2003 excavation AGE proposes to expand the excavation to the north and east of the existing excavathon(Figure 3) During the excavation, soil will be screened for organic vapors (OVs) using a organic vapor meter Advanced GeoEnvironmental,Inc