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I ' Multi-Level Monitoring Well Installation Report - Third Quarter 2005 • THREE B'S TRUCK PLAZA ' 14749 Thornton Road, Lodi, California ' 1.0• INTRODUCTION AND SCOPE OF WORK Advanced GeoEnvironmental, Inc (AGE) has prepared this ground water monitoring well ' Installation report for 14749 Thornton Road (site), Lodz, California, in accordance with guidelines issued by the California Regional Water Quality Control Board(RWQCB)-Central Valley Region for investigations of underground storage tank (UST) sites The report documents procedures and ' results for installation of three (3) multi-level ground water monitoring wells at the site during July 2005 The location of the site is illustrated in Figure 1, general features at the site are Illustrated ' in Figure 2 A summary of previous investigations at the site was included in Work Plan Addendum- July 2002, dated 23 July 2002, prepared by AGE ' The scope of work of this investigation Included Installation of three (3) multi-level ground water monitoring wells(MW-13 through MW-15)with the objective of assessing the Impact of petroleum hydrocarbons to ground water Based on soil data collected from previous cone penetrometer testing ' (CPT)results and comparison with soil descriptions from borings previously advanced on the site, AGE previously developed a preliminary subsurface model of the site soil stratigraphy comprised of six hydrologic Informal zones (Cone Penetrometer Testing Site Investigation -Fourth Quarter ' 2001,dated 15 March 2002) The multi-level wells were generally screened at depths of between 14 and 25 feet bsg (Hydrologic Unit 1), 39 and 45 feet bsg (Hydrologic Unit 2), 69 and 75 feet bsg (Hydrologic Unit 3),94 and 100 feet bsg(Hydrologic Unit 4), 119 and 125 feet bsg(Hydrologic Unit 5) and between 144 and 150 feet bsg (Hydrologic Unit 6) The following is a brief summary of events for the above referenced multi-level well installation activities performed at the site • 05-06 July 2005 - install 8-Inch diameter, steel conductor casings to 11 feet bsg for wells IMW-13 through MW-15 • 07-10 July 2005 - Soil boring for MW-15 advanced to 149 feet below surface grade (bsg), ' soil samples not collected during drilling, boring completed as multi-level monitoring well MW-15 (A - F) I • 11-13 July 2005 - Soil boring for MW-14 advanced to 150 feet bsg, soil samples not collected during drilling, boring completed as multi-level monitoring well MW-14 (A -F) • 14-15 July 2005 - Soil boring for MW-13 advanced to 149 feet bsg, soil samples not collected during drilling, boring completed as multi-level monitoring well MW-13 (A -F) • 15 and 19 July 2005 - Well development activities performed at wells MW-13 through MW-15 • Advanced Gco maronmental,Inc I