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QUARTERLY SUMMARY REPORT <br /> First Quarter 2002 <br /> (January- March) <br /> 'HARACTERIZATION/REMEDIAL STATUS: <br /> Impacted soil delineated? Lateral:yes <br /> Vertical: yes <br /> Impacted ground water delineated? no <br /> Current Phase of Project? Groundwater Monitoring and Sampling, <br /> Interim Remediation and Additional <br /> Delineation <br /> Frequency of Sampling? Quarterl <br /> Current Remediation Techniques? Groundwater Purgin <br /> Soil remediation in progress? no <br /> -anticipated start? NIA <br /> -anticipated completion? January 1999 <br /> Groundwater Gradient (historical)? Southeast to southwest at an avera e . <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 impacted groundwater recovered this quarter? 51,300 (gal) <br /> Amount of impacted groundwater recovered historically? 608,560 (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 been completed but did not define the downgradient extent of impacted groundwater. The impacted <br /> oundwater beneath the site is currently being remediated by weekly groundwater purging. The purged <br /> groundwater is being transported to the Tosco Refinery in Rodeo, California for disposal. <br /> RECOMMENDATIONS: <br /> GR proposes to install five additional groundwater monitoring wells downgradient of the site to delineate the lateral <br /> extent of impacted groundwater. In addition, GR recommends the continuation of the weekly groundwater purging <br /> program. <br /> CONSULTANT: Gettler- Ryan Inc. <br /> 140193.01 <br /> 2 <br />