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Based on the results of the Geoprobc investigation, Condor recommended that monitor wells be installed at the site to investigate and monitor the lateral extent of the gasoline and diesel contamination plume (reference - Soil and Gtoundwatei Investigation Report, prepared by Condor, dated September 30, 1996) Mr Ronald Rowe of the PHS/h1ID approved the proposal for the monitor well installation in correspondence to Condor, dated February 6, ' 1997 Condor subsequently prepared the Work Plan for Monitor Well Installation, dated May 30, 1997 As described in Section 1 0 of this report, the Work Plan was approved by the PHS/EHD and the Reclamation District in July, 1997 ' In accordance with the work plan, Condor conducted an additional soil and groundwater investigation on September 10, 15, and ltd, 1997, at the site I our monitor wells were dnlled, installed, developed, surveyed, and ' sampled as part of the investigation I he Reporl Additional Soil and Gi oundivalel Invc wtgatton, dated December 11, 1997, was prepared by Condor describing the investigation results ' Laboratory analysis of the soil samples indicated that total petroleum hydrocarbons quantified as kerosene diesel, and motor oil (TNPH), ethanol, tertiary butanol, DIP[~, PTB1 and (TAMF) were not detected at or above the laboratory reported detection limits in any of the samples collected from the monitoring wells during the September, 1997, sampling event BTI~X, FPH-G, and M'1131• were not detected at or above the laboratory reported detection limits in the soil sample collected from MW 1 at a depth of six feet bgs Benzene, ethyl benzene ' and xylene were not detected at or above the laboratory reported detection limits in the soil sample collected from MW-2 at a depth of four feet bgs Toluene, TPH-G and MTBh were detected in the soil sample collected from ' MW-2 at a depth of four feet bgs (16 µg/kg, 1 2 mg/kg and 1,300 ug/kg, respectively) Benzene and toluene were not detected at or above the raised laboratory reported detection limit in the soil sample collected from MW4 at a ' depth of six feet bgs MTBE was not detected at or above the laboratory reported detection limit in the sample collected from MW4 at a depth of six feet Fthyl benzene, xylene and TPH-G were detected in the soil sample t collected from MW4 at a depth of six feet(680 µg/kg, 6,000 4/kg, and 28 mg/kg, respectively) Laboratory results of the soil samples are presented in Table B 5, on the next page 1 ' L� CON13OR