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Monitoring Well Installation Report - Third Quarter 2010 CANCUN RESTAURANT 135 East Miner Street, Stockton, California 1.0. INTRODUCTION At the request ofWest Clay Properties, Advanced GeoEnvironmental, Inc. (AGE) has prepared this quarterly report for the property located at 135 East Miner Street, Stockton, California. The site and the surrounding area are illustrated on Figure 1. Structures, well and boring locations are illustrated on Figure 2. Historical background information is summarized in Appendix A. The scope of work included advancement of five pilot borings, collection of soil, installation of one shallow and four deep monitoring well; well development and sampling of five groundwater monitoring wells and preparation of this report. The following is a brief summary of third and fourth quarters 2010 ground water monitoring activities performed at the site: • On 29 July off-site monitoring well MW-313 was installed to a depth of 60 feet below surface grade (bsg) along the east side of Hunter Street, north of Miner Street. • On 30 July off-site monitoring well MW-213 was installed to a depth of 60 feet bsg along the east side of Hunter Street, near Miner Street. • On 05 August off-site monitoring well MW-46 was installed to a depth of 60 feet bsg along the north side of the Miner street, east of Hunter Street. • On 06 August monitoring wells MW-1A and MW-1B were installed to depths of 40 and 60 feet bsg, respectively, in the vicinity of the removed UST location of the site. • On14 August, the five monitoring wells were developed. • On 24 August, waste soil from the drilling of the five wells was disposed. • On 08 October 2010, a ground water monitoring event occurred. 2.0. PROCEDURES The work was also performed in accordance with procedures approved in the Monitoring Well Installation Work Plan, dated 03 December 2008 and approved by the San Joaquin County Environmental Health Department(EHD) by letter dated 10 December 2008. This report has been prepared in accordance with Central Valley Regional Water Quality Control Board(CVRW QCB)guidelines for investigation of underground storage tank(UST) sites. Advanced GeoEnvironmental,Inc.