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DECEMBER 1996 <br /> QUARTERLY STATUS REPORT (CONTINUED) <br /> Table 4 presents a summary of the analytical results from all previous soil sampling events <br /> • Site map delineating contamination contours for groundwater and soil based on <br /> recent data <br /> Figure 3 is a site plan that presents the analytical results from the groundwater samples <br /> collected on December 11, 1996 A "zero" line for groundwater contamination was not <br /> included in the figure because BTEX parameters were not detected in any of the samples <br /> TPH-D has only been detected intermittently at low concentrations <br /> Figure 4 is a site plan that presents a summary of the analytical results from all the soil <br /> samples collected from the site A TPH-D "zero" line and 10-ppm line are indicated in the <br /> figure <br /> • Estimates of the quantity of contamination remaining in soil and groundwater, and <br /> time for completing remediation <br /> Based on the results of the second supplemental site assessment, approximately 6,000 <br /> cubic yards of soli contammg detectable concentrations of TPH-D are estimated to remain <br /> beneath the site <br /> • Method of cleanup proposed or implemented to date <br /> Greyhound has requested site closure with no further action (Request for Closure Report, <br /> dated November 1996) PHS-EHD has verbally informed Parsons ES that the request is <br /> currently under review <br /> • Times and dates equipment was not operating, cause of shutdown, and a corrective <br /> action plan to ensure similar shutdowns do not reoccur <br /> Not Applicable <br /> • Time schedules for completion of the site investigation and remediation <br /> Greyhound is currently awaiting review of the November 1996 Request for Closure <br /> Report <br /> • Method of disposal and disposal location of released hazardous substances and any <br /> contaminated soil, groundwater, or surface water <br /> During the December 1996 site visit, groundwater generated from purging the on-site <br /> monitoring wells was discharged to the sanitary sewer following receipt of approval from <br /> Mr Moms L Allen of the City of Stockton Department of Municipal Utilities <br /> PARESSYROAVOL1 WP172887M08969108969L03 WW6 <br /> 3 <br />