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MAJOR MART SITE HISTORY <br /> PREVIOUS SITE INVESTIGATION AND REMEDIATION ACTIVITIES <br /> i <br /> "LL A brief annotated chronology of the previous investigative and remedial activities <br /> �+ performed at the Major Mart Site is presented below; <br /> • April 1988, Leaking underground storage tank oapproximately 10,000 gallon <br /> capacity identified as a result of failed tightne�s s test. <br /> • January 1990, Regional Water Quality Board verbally demands immediate . <br /> response to leaking tank. <br /> • June 1990, Leaking tank is removed by Seibold Soils collected from the soils <br /> excavation and analyzed, contain BTEX,TPH and lead concentrations. "Simple <br /> Green" surfactant applied by the Contractor to th`e tank, reportedly in an attempt <br /> to facilitate decontamination activity. Ia n <br /> • July 1990, Spill report submitted to PHS/EHD <br /> J1 V1 <br /> ' • June 1991, Responsible party is identified and, Woodward-Clyde begins <br /> Remedial Investigation. Remedial Investigation involves installation of wells <br /> MW-1,-2 and -3. <br /> ` Ri <br /> 'k • October 1991, Report completed and submitted to PHS/EHD. <br /> • November 1991, PHS/EHD responds to Remedial Investigation Report and <br /> requires quarterly groundwater monitoring and additional investigation. <br /> } • Fall 1991, First Quarterly Monitoring Event. , <br /> b <br /> • Winter 1992, Second Quarterly Monitoring Event. <br /> • Spring 1992, Third Quarterly Monitoring Event. <br /> I E�� <br /> f i� <br />