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GEOTECHNICAL ENGINEERS AND GEOLOGISTS rail MARANO l 11840 DUBLIN BOULEVARD, DUBLIN,CALIFORNIA 94568 (510)833-9297 FAX(510)833-9548 i i S Project No. E6576.001 f 1 April 1996 Mr. Donald Hoffinan 11828 Dublin Boulevard Dublin, CA 94568 1. • Subject: Former UST Site 835 West Clover Road t Tracy, California REPORT OF WELL DESTRUCTION li I Dear Mr. Hoffman: i At your request, TERRASEARCH, inc. supervised the in-place abandonment of four 1-inch groundwater monitoring wells MW-1 through MW-4 at the subject site. This work was performed on 27 March 1996 according to the attached Well Destruction Permit and was coordinated by Ms. Margaret Lagorio and supervised by Mr. Steven Sasson of the San Joaquin i County Public Health Services Environmental Health Division. l I The well boxes enclosing wells MW-1 through MW-3 were excavated and removed and approximately one-foot of the casing was cut before well abandonment activities were initiated. Approximately..10 gallons of grout were poured into each well followed by the placement- of a well cap with an attached pressure valve. Each well cap fitting was then filled with air supplied from an air compressor at 125 p.s.i. for approximately five minutes or until air was i observed escaping from the surface. After pressurizing each well, the wells were then capped- off with an additional 5 gallons of grout or until the grout reached the top of casing. Approximately six (6) feet of well casing from MW-4 was inadvertently removed during the attempted removal of the well box. Upon aproval of Mr. Sasson, approximately 10 gallons of i grout were poured directly into the former well opening, sealing the well in place. i SINCE 1969 6840 VIA DEL ORO, SUITE 110,SAN JOSE,CALIFORNIA 95119-1348 (408)362-4920 FAX(408)362-4926