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C3EOMATRIX <br /> Mr.'C. Dean Hubbard <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> May 24, 2004 <br /> Page,2 <br /> RESPONSE TO COMMENTS <br /> Below are responses to the comments contained in RWQCB's March 2, 2004 letter: <br /> a) Submit work plan to delineate the extent of groundwater impacts northeast to northwest <br /> of the site. <br /> cribed below to delineate the lateral extent of <br /> Geomatrix has developed the work plan des <br /> impacted groundwater downgradient of the site. <br /> b) Describe potential future land use and a deed restriction. <br /> ChevronTexaco has implemented an environmental decision execution process (EPDEP)that <br /> will evaluate various site information(e.g., environmental conditions,health risk,property <br /> value, cost for remediation, etc.) and develop strategic alternatives for future property devel- <br /> opment. Depending on the outcome of the process, ChevronTexaco will implement appro- <br /> priate remedies(e.g., deed restriction),if needed, consistent with the planned land use. <br /> ChevronTexaco expects to complete the EPDEP process by the end of 2004. <br /> c) Describe disposition and/or management of stockpile and petroleum-impacted surface <br /> soil. <br /> A decision regarding the disposition and/or management of stockpile and petroleum-impacted <br /> surface soil will be reached by the end of the EPDEP process. The site is currently fenced <br /> preventing access to the soil piles. <br /> d) Provide plan and schedule for signage and fence maintenance. <br /> the site; however, a <br /> on of <br /> The site is currently fenced to prevent <br /> has subcontracted a fencing company tolrepair <br /> the fencing is currently in disrepair. <br /> the fence and post"No Trespassing" signs. <br /> In addition, Geomatrix will contract with The Wakenhut Corporation to perform monthly site <br /> walks to inspect the fence and to determine if additional repairs are required in the future. A <br /> site inspection form will be completed and sent to Geomatrix, who will coordinate repairs as <br /> necessary. Fence repairs are expected to occur in June 2004 and monthly inspections will <br /> begin the following month. <br /> WORK PLAN FOR ADDITIONAL INVESTIGATION <br /> Geomatrix will advance borings at selected locations(Figure 3) to collect data to delineate <br /> the downgradient extent of affected groundwater. Prior to drilling, Underground Service <br /> Alert(USA)will be notified, the soil boring locations will be cleared by a private under- <br /> ground utility locator, and appropriate permits and access will be obtained from the City of <br /> Tracy and San Joaquin County Public Health Services,Environmental Health Division. <br /> Access for work within private property will be obtained by ChevronTexaco. <br />