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1994)for completing exploratory groundwater sampling,well installation,pump testing, <br /> r <br /> 1 . and preparation of a Final Remediation Pian. <br /> In April 1995,Del Monte submitted a Problem Assessment Report and Final Remediation <br /> Plan(PAR/FRP)to describe the supplemental investigation.The PAR/FRP followed the <br /> guidelines of the Tri-Regional Board Staff Recommendations for Preliminary Evaluation and <br /> Investigation of Underground Tank Sites,Appendix A -Reports (Central Valley Regional Water <br /> Quality Control Board, 1991). <br /> 1 As approved by PHS/EHD,Del Monte began operating an air sparging and soil vapor <br /> extraction (AS/SVE)system in February 1995. This remediation system focused on <br /> removing gasoline constituents in the source area above and below the groundwater table. <br /> Approximately 9,000 pounds of total petroleum hydrocarbons (TPH)as gasoline was <br /> removed during operation of the remediation system. In February 1996 the remediation <br /> system was shut down due to rising groundwater levels. <br /> At the direction of PHS/EHD,Del Monte is currently conducting quarterly groundwater <br /> monitoring(since 1991)and conducting a 1-year intrinsic bioremediation(ITB) <br /> demonstration. <br /> { <br /> 4 <br /> t <br /> 1 <br /> i <br /> r <br /> I � <br /> a� <br /> ' SFO/G:TROJECTsIDELMONTEIPLANT 331ORPT2_971QTR_REP.DOC 2 <br /> i <br />