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<br />Sent By: GC ENVIRONMENTAL RINGj <br /> <br />714 632 9968j <br /> <br />Dec.5.02 11 :39j <br /> <br />Page 18/34 <br /> <br />GeE personnel mobilized immediately in response to the Office of the State ArchitectS (OSA's) <br />request rdr Emergency Response for closure by removal of a leaking UST at the University of <br />Califomi~ Irvine (UC!) Engineering Central Plant and Fleet Services facilities. Field <br />assessment activities completed for both of these sites included agency negotiation, UST <br />removal and preparation of a Remedial Action Plan (RAP) for both sites. The following are <br />specific t3sks completed at each of these locations. <br /> <br />En~neuin, Central Plant Facility: GeE personnel managed the site assessment operations at <br />UCI's Engmeering Centr4l Plant facility. Project included removal ofUSTs used for diesel fuel <br />storage; subsurface soil and groundwater quality assessment; Installation of groundwater <br />monitoriJig wells; collection of soil and groundwater for chemical analyses; and ambient air <br />monitoritlg and soil :samplc screening. The extent of groundwater contamination was assessed, <br />and diesel in the forin of free-phase product was identified as the contaminant. GCE completed <br />a Remedial Action Plan (RAP) outlining field activities and recommended product removal as a <br />preferred'option for groundwater clean up. The RAP was approved by the RWQCB. Most of <br />the prodUct has been removed from groundwater, and remediation has reached a steady state, <br />and a point of rniniinal return. GeE has recently submitted a request for site closure and is in <br />the proceSs of sche$ling a meeting with Regional Water Quality Control Board (RWQCB) and <br />Orange County Health Care Agency (OCHCA) to negotiate site closure on behalf of the client. <br />Siteclos\Ue has beei1 approved by OCHCA and awaits approval by R WQCB. <br /> <br />Fleet SirYices Fadlitv: GeE personnel initially managed the installation of groundwater <br />monitoriilg wells around the .Fleet Services facility. During the well installation, it was found <br />that the :soil and groundwater in the vicinity of the site's USIs was contaminated with <br />volatile organic hydrocarbon compounds. GeE completed a Remedial Action Plan (RAP) <br />outlining field activities and compiling requirements for a quarterly groundwater sampling <br />and monitoring program for the property. The RAP was approved by the RWQCB. GCE has <br />been supervising the ongoing quarterly groundwater sampling and monitoring presently being <br />conducted at this site. <br /> <br />Tn November 1998, GCE was contracted for the removal of the two usn at this facilit)'-~me <br />containej1 gasoline, the other stored diesel fuel. GCE oversaw the removal of contaminated soil <br />from the:UST excavation. The removal portion of the project also involved the removal of more <br />than 200 cubic yards of petroleum contaminated soil for treatment and recycling. <br /> <br />Since !hi: removal of the contaminate source, the size of hydrocarbon plume in groundwater <br />has steadily decreased. GeE has completed a feasibility study recommending the intrinsic <br />bioremediation, "No Further Action," as the most viable and cost-effective remedial option <br />for the site, as long as the hydrocarbon plume is shrinking. GCE has recommended sparging <br />as a secOndary alternative if site conditions change. <br /> <br />9.0 REFERENCES <br /> <br />GeE encourages the City of Santa Ana to contact any of the following for information on our <br />performance on environmental contracts. <br /> <br />14 <br /> <br />p;\O.....e<\OPROl'OSLlCity DC San.. ^n&ID2P.12.Q9) Environcmn..1 Setvlcesl.doc <br />