SITE INFORMATION AND CORRESPONDENCE

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2905 Benjamin Holt Compliance Summary 1989 Chevron promises to investigate and remediate the site. In early February, Chevron agreed to submit a work plan in March and a problem assessment report by late April. Five monitoring wells were installed in late February. In September, the CVRWQCB required additional investigation to determine the full extent of the contamination. Quarterly groundwater monitoring was initiated in March. 1990 In early April, Chevron notifies the CVRWQCB that a work plan to continue the investigation would be submitted by the end of the month. In early May, Chevron requests an extension until mid June. In early May the CVRWQCB approves the extension and directs Chevron to submit a PAR by late August. In late July, the CVRWQCB informs Chevron that the work plan submitted will not adequately investigate the contamination. In September, PHS/EHD notifies Chevron to submit permit applications and encroachment agreements. 1991 In February, PHS/EHD approves the installation of BAT probes, but not in lieu of monitoring wells. In March five bat probes are installed. In December, PHS/EHD notifies Chevron that the groundwater plume has not been defined nor a remedial action plan submitted. PHS/EHD directs Chevron to submit a new work plan or implement the June 1990 work plan by mid February. 1992 In January, a meeting is held at the CVRWQCB and Chevron agreed to install the additional wells by March 1 and submit a PAR by June. In February, a second addendum to the June 1990 work plan was submitted for the installation of two MWs and one vadose well. In March, monitoring wells, MW6 and MW7 and vapor zone well, VW1, were installed. In December, PHS/EHD notified Chevron that either a problem assessment report or a work plan to complete the investigation should be submitted by February 1, 1993. PHS/EHD also indicated that a municipal well sampling plan has not been submitted as directed, that there had been no discussion about the disposition of contaminated soil from the tank removal and site investigation nor about the BAT system probes. 1993 In January, Chevron agreed to the following schedule: 1/29/93 Submit fourth quarterly report 2/7/93 First quarter sampling at site and Muni Well#10 3/15/93 Work Plan to install well downgradient of MW6 4/7/93 Submit first quarterly report 4/15/93 Drill well downgradient of MW6 6/30/93 Submit PAR and proposal to destroy BAT probes In March, the work plan to install MW8 was approved. Negotiations between Chevron and the City of Stockton continued and the well installed in December. PHS/EHD directed Chevron to initiate work on the PAR for submittal in late October. In late September, Chevron requests an extension for the PAR submittal until early December. In late November, Chevron's consultant informs PHS/EHD that a PAR would be submitted by late February 1994. 1994 In March, Chevron submits the second and third quarter 1993 monitoring reports. In March, Chevron's consultant stated that a PAR/RAP would be submitted later that month. Chevron submits a PAR/Feasibility Study that proposed additional investigation. In April, PHS/EHD informed Chevron that extensions were granted so that all the necessary investigation and feasibility studies could be conducted. PHS/EHD directed Chevron to submit by 5/2/94 a work plan, to complete within 45 days the field work and feasibility studies and to submit a PAR addendum by 7/15/94.