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1 Geo(oglcaL`Iec(nus Inc- Page 2 ' Domestic Well Abandonment Report Project No 723 2 • Apnl 23,2001 ' 2.2 Well Abandonment On Apnl 20, 2001, GTI staff mobilized to the site to supervise the destruction of the well by blast perforation Clark Well Inc staff was present to pump grout into the well and Water ' Well Technology (WWT) staff was present to conduct the blasting operation Mr Jeff Wong of the SJC PHS/EHD was on site to witness the work Photographs of the progression of the work are included in Appendix A ' The well destruction process was completed as follows • GTI staff measured depth to water and the total depth of the well (DTW=28 6 ft, TD= 71 ' ft) • WWT staff prepared the explosive charge line for insertion into the well (Photo #1) ' • WWT staff lowered the explosive charge line into the well (Photo #2) • Clark Well Inc staff lowered 40 feet of 2 inch PVC pipe into the well and pumped grout into the well (Photo #3) ' • The immediate area surrounding the well was cleared and the charge detonated • A second charge was detonated to ensure the explosives were fully depleted ' a The explosion vapors emanating from the well were allowed to dissipate and the grout level was checked (Photo #4) • The grout had settled approximately twelve feet down the casing The casing was ' . refilled with grout to the top of the casing and the operation was complete (Photo #5) 3.0 CONCLUSIONS & RECOMMENDATIONS This completes the destruction of the domestic well at 60 E Castle Street, as directed by the SJC PHS/EHD With the completion of the above task, GTI concludes that the nsk of the groundwater contamination migrating vertically via the domestic well has been alleviated We recommend that the SJC PHS/EHD review and approve our August 23, 2000, "Work ' Plan for Vertical Definition" submitted to and received by SJC PHSIEHD on August 29, 2000 ' 4.0 LIMITATIONS This report was prepared in accordance with the accepted standards and practices of the ' field of environmental geology, groundwater hydrology and good business practices It should be recognized that definition and evaluation of environmental conditions is a difficult and inexact science Judgments leading to conclusions and recommendations are ' generally made with an incomplete knowledge of the site-specific conditions present The tasks proposed and completed during this project were reviewed and approved by the local regulatory agency for compliance with the law No warranty, expressed or implied, is made •