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' Remediation Plan Cleanup and Abatement Order No 5-00-707 EAI Project No 1232 2 0 RECENT ASSESSMENT WORK AND EVENTS 21 Supplemental Investigation Report and Problem Assessment Report ' On October 13, 2000, EAI, on behalf of Wards and Unocal submitted to the RWQCB a report entitled "Supplemental Investigat>on Report, Problem Assessment Report and Work Plan" (SIR/PAR Report) (see EAI, 2000A) The SIR/PAR Report • Summarized existing hydrogeological conditions relatcd to the Waids and Unocal sites • Assessed the extent of petroleum hydrocarbon impact at the Wards and Unocal sites ' • Proposed additional work to define the extent of impact at the Unocal site and to investigate the lateral and vertical extent of contamination from the Unocal and Wards sites towards to RIW ' On October 27, 2000, the RWQCB forwarded a letter approving only the Cone Penetrometer Test (CPT) soundings around the RIW to provide data on the lateral and vertical extent of contamination from Unocal and Wards towards to RIW, with the understanding that the Information obtained from completing the CPT work would be used to determine additional well locations on the Unocal and Wards sites required to define the vertical extent of ground ' water impact beneath these two sites 2.2 CPT Investigation and Work Plan On December 27 2000 EAI on behalf of Wards and n > Unocal submitted to the RWQCB a report entitled "Results of CPT Investigation and Work Plan (CPT Report) (see EAI, 2000B) ' The CPT Report presents o The results of the CPT work completed to define the lateral and vertical extent of contamination around the RIW ' o Proposed well locations on the Unocal and Wards sites to define the vertical extent of impact beneath these two sites, and a deep well near the RIW for future ground water monitoring purposes ' On January 9, 2001, the RWQCB forwarded a letter approving the CPT Report, I e , proposed well locations e2.3 Wards Bankruptcy ' In December 2000, Wards filed for bankruptcy and the remedial system located on the Wards site (air sparging coupled with vapor extraction) Is deactivated The remedial syste>n on the Wards site was put pito operation in November 1999 and removed over 8,200 pounds of hydrocarbons prior to being deactivated in December 2000 The Wards remedial system was reactivated on June 21, 2001 BS 1232P RAP App -2- ENVIRONMENTAL AUDIT,ENC