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TABLE 1 <br /> GROUNDWATER MONITORING&WELL ABANDONMENT PROPOSAL <br /> Corral Hollow and Grant Line Roads <br /> Tracy, California <br /> Location with RWQCB Proposed <br /> Well ID' Respect to Plume Proposals Status Rationale <br /> MW-3 cross-gradient quarterly abandon Distal location and non-detect since 1989. <br /> MW-5 cross-/up gradient annual annual Upgradient perimeter,non-detect since 1994. <br /> MW-6 inside quarterly semi-annual Monitor dissolved petroleum constituents within the plume(highest concentrations). <br /> MW-7 inside annual semi-annual Monitor dissolved petroleum constituents within the plume(lowest concentrations). <br /> MW-8 cross-gradient annual semi-annual Perimeter,steadily declining concentrations. <br /> MW-9 downgradient abandon abandon Distal location and non-detect since 1993. <br /> MW-10 downgradient quarterly semi-annual Downgradient,4 quarters of non-detect. <br /> MW-11 cross-gradient annual abandon Distal location and non-detect since 1994. <br /> MW-12 inside quarterly abandon Duplicative of MW-6 and MW-7. <br /> MW-13 cross-gradient annual abandon Outside perimeter,duplicative of MW-8. <br /> MW-14 downgradient annual annual Downgradient,non-detect since installation(1996). <br /> ASW-1 inside no sampling no sampling Use to confirm lack of vertical migration at project closure. <br /> Notes: <br /> 1. With the exception of ASW-1,these wells are currently monitored in compliance with RWQCB Monitoring and Reporting Plan 96-814. <br /> 2. Proposed sampling as presented in CPL and RWQCB meeting of 23 April 1998. ' <br /> 1APR0]ECN958\WL\abn we11.x1s <br />