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' Remediation Plan Cleanup and Abatement Order No 5-00-707 EAl Prolect No 1232 2.4 Well Installation Report On April 6, 2001, EAI, on behalf of Unocal submitted to the RWQCB a report entitled "Well Installation Report (Well Report) (see EAI, 2001B) The Well Report provides information on the installation of four wells on the Unocal site and one well near the RIW Due to Wards bankruptcy filing, the well proposed in the CPT Report for the Ward site was not installed 25 Test Boring Results and RIW Status On October 18, 2000, EAI, on behalf of Unocal and Wards, submitted to the RWQCB a report ' entitled "Work Plan for Relocation of the Delta College Irrigation Well " On October 20, 2000, the RWQCB forwarded a letter approving the work plan On January 16, 2001, EAI submitted to the RWQCB a report entitled "Test Boring Results Robinhood Irrigation Well Replacement" (Well Replacement Report) (see EAI, 2001A) The Well Replacement Report provides information on test boring water quality (i e , general ' minerals and volatile organic compounds, including fuel oxygenates), sieve analysis, former and current UST sites and production wells within 2,500 feet of the test boring site, and proposed construction details for a new irrigation well On February 26, 2001, the RWQCB forwarded a letter approving the proposed new irrigation well location and design, and requested that the RIW be destroyed SECOR is currently completing an evaluation to determine if the new irrigation well can be located within 50 to 100 feet of the existing RIW without impacting the Unocal and Wards sites, including evaluating modifying the existing RIW for future use The results of the SECOR work should be available ' in mid July 2001 During March and April 2001, EAI worked with the RWQCB, UST Cleanup Fund and San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) regarding replacement of the RIW and destruction of the RIW On April 26, 2001, EAI submitted to PHS-EHD an amended work plan for destruction of the RIW (see EAI, 2001C) On April 27, 2001, PHS-EHD approved the amended work plan Destruction of the RIW has been placed on hold pending the results of the SECOR work described above ' 26 Quarterly Ground Water Monitoring Unocal and Wards have been conducting joint ground water monitoring events for the past several years The most recent quarterly ground water monitoring was condoted on May 30, 2001 (see Tables 2 and 3) Figure 2 is a site plan showing the locations of all wells associated with this project Table 1 and Figure 5 summarize well construction details in tabular and graphic form, respectively Table 2 summarizes ground water elevation data, and Table 3 ground water quality data 6S 1232P RAP ADD -3- ENVIRONMENTAL AUDIT, INS'