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RECEIVE JUL 23 2012 APEX ENVIRONMENTAL HEALTH E NVI: ROTE C' , I I C . 11244 Pyries Way-Go :Phone 916.851.0174•Fax 916-851-017ToIFree1 800�2s42 5249CES July 16, 2012 Ms. Victoria L. McCartney, REHS San Joaquin County Environmental Health Department. . 600 E Main Street - Stockton, California 95202-3029 Subject: Well Destruction Workplan Former Moore Petroleum Bulk Plant 5491 `F' Street, Banta, California Apex Project No. ERA02.004 Dear Ms. McCartney:. Apex Envirotech, Inc. (Apex) has been authorized by Moore Petroleum (Moore) and Van De Pol Enterprises to provide this well destruction workplan proposing to destroy all monitoring and remediation wells associated with the subject site. This workplan was prepared in response to correspondence from the San Joaquin County Environmental Health Department(SJCEHD) i dated April 19, 2012 (Appendix A). This workplan is based, in part, on information obtained by Apex from Moore, and is subject to modification as newly acquired information may warrant. BACKGROUND Apex began work on this project with groundwater.0 monitoring beginning on January 14, 1994.Prior to Apex, work conducted at the site included subsurface investigations and groundwater monitoring by Earth Treatment Systems(ETS), Inc. of Manteca, California, Delta Environmental Consultants, Inc. (Delta) of Rancho Cordova, California,Nations Groundwater Associates (NGA) of Sacramento, California, and Aegis Environmental, Inc. (Aegis) of Roseville, California. Site details of work completed prior to Apex's work at the site were obtained in Aegis's Quarterly Groundwater Monitoring Report,dated April 18, 1991, which was submitted to Moore. Prior to August 1988—ETS.installed monitoring well MW-1: Results were presented in ETS's Environmental Preliminary Site Assessment, dated August:1988. i