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QUARTERLY SUMMARY REPORT <br /> Fourth Quarter 2001 <br /> (October—December) <br /> Frequency of Sampling? Quarterl <br /> Current Remediation Techniques?q Groundwater Pur in <br /> Soil remediation in progress? no <br /> -anticipated start? NIA <br /> -anticipated completion? January 1999 <br /> Groundwater Gradient (historical)? Southeast to southwest at an averaj4e <br /> gradient of 0.001 ft/ft <br /> Dissolved/free product remediation in progress? Yes <br /> -anticipated start? February 1999 <br /> -anticipated completion? unknown <br /> Amount of gw contaminant recovered this quarter? 50,000 (gal) <br /> Amount of gw contaminant recovered historically? 557,260 (gal) <br /> CONCLUSIONS: <br /> The vertical and lateral extent of soil impact is defined. Additional subsurface investigation in the vicinity of well <br /> MW-10 is warranted. The impacted groundwater beneath the site is not defined but is currently being remediated <br /> by weekly groundwater purging. The purged groundwater is being transported to the Tosco Refinery in Rodeo, <br /> California for disposal. <br /> RECOMMENDATIONS: <br /> GR will advance 5 GeoprobeOs and collect grab groundwater samples to further access the groundwater conditions <br /> downgradient of well MW-10. In addition, GR recommends the continuation of the weekly groundwater purging <br /> program. <br /> #CONSULTANT: Gettler- Ryan Inc. <br /> 140193.01 <br /> 11I195gsr.4 <br /> 2 <br />