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Mr . Scott Walker November 22 , 1988 202/799-5027 . 02 Page 4 43 feet below surface grade. Each well would be completed with a bentonite and cement grout seal . A traffic-rated street box would be installed to grade for access . Typical monitoring well construction is contained in Attachment II . Each monitoring well would be developed by hand bailing to remove fine materials from the well and filter pack. Impacted soil and/or groundwater collected during the well installation and development would be placed in approved containers with sealing lids for treatment or disposal at a later date. The newly- installed wells would be surveyed to an established datum with existing wells , as an elevation control necessary for subsequent monitoring. Selected soil samples collected during drilling would be sub- mitted for laboratory analyses of benzene, toluene, ethylbenzene and xylene (BTEX) , and TPH as gasoline using U. S . Environmental Protection Agency (EPA) Method 5030/8015/8020 . In addition, groundwater samples would be submitted for similar analyses using Modified EPA Method 602 . The PAR would include a discussion of groundwater remediation options for the site . Soil remediation would be addressed in a Soil Remediation Proposal ( SRP) as requested by the CRWQCB-CVR. The SRP would be generated by GTI and submitted to the CRWQCB-CVR by December 30, 1988 . A Final Remedial Plan (FRP) , summarizing the SRP and addressing groundwater remediation, could be provided subsequent to the PAR. The FRP would include a cost estimate and generalized time frame for implementation. TIME LINE The following table illustrates an approximate time line under which the work steps would be implemented. This time line becomes effective following review of this work plan by the CRWQCB-CVR and granting of permission by SJLHD to continue with the problem assessment phase of this investigation. This time line is , however , subject to change due to regulatory involve- ment .