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QUARTERLY SUMMARY REPORT <br /> Second Quarter 2001 <br /> (April—June) <br /> "Soil remediation in progress? no <br /> -anticipated start? NIA <br /> -anticipated completion? January 1999 <br /> Groundwater Gradient? Southeast to southwest at an average <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? 57,000 (gal) <br /> Amount of gw contaminant recovered historically? 468,260 (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 submit a Work Plan to further access the groundwater conditions downgradient of well MW-10. GR <br /> previously recommended that well MW-10 be added to the groundwater purging program. However, the well could <br /> not be located/accessed by Onyx Industrial Services. The offsite area in the vicinity of MW-10 has been cleared <br /> of weeds and the well clearly marked, and therefore will be added to the purging program. <br /> .1"ONSULTANT: Gettler - Ryan Inc. <br /> 5 _ <br /> 140193.01 <br /> Il 1195gsr.a2 <br /> 2 <br />