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I I� Quarterly Report - Fourth Quarter 2001 ' WATERLOO FOOD & FUEL 3032 E Waterloo Road, Stockton, California ' 1.0. INTRODUCTION AND SCOPE OF WORK ' At the request of Mr Paul Sidhu, Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for the site located at 3032 E Waterloo Road, Stockton, California (site) The location of the site is Illustrated in Figure 1 The locations of structures and monitoring wells on the site are depicted in Figure 2 The scope of work reported herein Includes a quarterly ground water monitoring event performed on 31 October through 02 November 2001 Site history and findings from previous investigations and monitoring events at the site are detailed in AGE's report titled Preliminary Investigation and Evaluation Report, dated 14 December 2000 and Cone Penetrometer Testing and Monitoring Well Installation Report dated 11 February 2002 Historical ground water monitoring results are included in the tables of this report I2.0. QUARTERLY GROUND WATER MONITORING AND SAMPLING EVENT • Tasks and procedures for this investigation were completed in accordance with the PHS-EHD-approved Preliminary Site Assessment Work Plan, dated 12 October 1999, and Interim Remediation and Site Assessment Work Plan, date 25 January 2001, both prepared by AGE This report has been prepared in accordance with guidelines established by the California Regional Water Quality Control Board(CRWQCB)- Central Valley Division for subsurface Investigation of ' underground storage tank (UST) sites Each hydrologic unit monitored was defined in the Cone Penetrometer Testing and Monitoring Well I Installation Report, dated 11 February 2002 Hydrologic units are defined as follows hydrologic units 1 (55 to 62 feet below surface grade [bsg]), hydrologic unit 2 (62 to 70 feet bsg), hydrologic unit 3 (70 to 90 feet bsg),hydrologic unit 4(90 to 100 feet bsg)and hydrologic unit 5 (100 to 155 feet bsg) Hydrologic unit 6 (175 to185 feet bsg) Is designated by this report as the deepest hydrologic unit monitored As-built monitoring well construction details are summarized in Appendix A and the hydrologic units are depicted on Figure 2A 2 1 MONITORING WELL EVACUATION AND SAMPLING PROCEDURES On 31 October and 01 November 2001, ground water monitoring and sampling were performed on 24 ground water monitoring wells (MW-1, MW-2, MW-4, MW-5A, MW5-B, MW5-C, MW5-D, MW5-E, MW-6A, MW-6B, MW-6C, MW-6D, MW-6E, MW-7A, MW-7B, MW-7C, MW-7D, • MW-7E, MW-8A, MW-8B, MW-8C, MW-8D, MW-8E) Advanced GeoEnvironment$I,Inc I