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i Quarterly Report - 152 East 1 I th Street, Tracy Page 4 as WORK IN PROGRESS • The following work is in progress Groundwater Quality Monitoring The round of sampling that was conducted at the site on February 25th 1994 completed the program of base-line sampling and one full cycle of seasonal groundwater quality monitoring according to the procedures established by the Ciround3yater Sampling Plan + Propelly at 52 that was approved by the SJCPHS Since the program was initiated, groundwater flow directions and gradients and contaminant distributions have been consistent and the concentrations of contaminants in the groundwater have varied within a narrow range Based on the understanding of the groundwater regime and the distribution of contaminants obtained from all of the data gathered through completion the February 25th, round of sampling, consideration was given to reducing the frequency of routine groundwater-quality monitoring to a sampling round conducted during the annual wet season However, in a letter dated April 13th 1994 the SJCPHS requested that routine groundwater-quality monitoring be continued on a semi-annual schedule In compliance with this guidance, routine monitoring will be continued according to the schedule defined in the Groundwater Sampling Plan and the next routine sampling round will be conducted . at the close of the forthcoming dry season That work is currently scheduled for late September 1994 It is expected that additional groundwater sampling and analysis, beyond the requirements for routine monitoring, will be necessary to effectively control and monitor a site remediation program When the details of a corrective action plan have been fialized, a comprehensive groundwater-quality monitoring plan will be developed to cost-effectively meet those specific requirements as well as the need for routine, periodic monitoring of groundwater conditions Corrective Action Plan As noted above, engineering and design studies for a Corrective Action Plan (CAP) for remediation of soil and groundwater at the site are well advanced It is estimated the CAP will be complete in approximately four weeks from the date of this report Petroleum Underground Storage Tani. Cleanup Fund Application The Navarras have applied to the California State Water Resources Control Board (SWRCB) under the Petroleum Underground Storage Tank Cleanup Fund for a grant to meet the cost of investigating and remediating the site