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i LFR Levine-Fricke 1.0 INTRODUCTION This report presents the results of well installation and groundwater monitoring activities recently completed at the Tracy Tire Fire Site located in San Joaquin County, California ("the Site"; Figure 1). LFR Levine-Fricke (LFR) has prepared this report on behalf of the California Integrated Waste Management Board (CIWMB) for submittal to the Regional Water Quality Control Board (RWQCB). All activities were conducted in accordance with the "Work Plan for Groundwater Monitoring Well and Production Well Installation and Quarterly Groundwater Monitoring at the Tracy Tire Fire Site Royster Tire Facility Tracy, California," dated May 6, 2003 ("the May 2003 work plan"). The May 2003 work plan was approved by the RWQCB in a letter dated May 5, 2003 to Chris Sherman of the DTSC and Todd Thalhamer of the CIWMB. 1.1 Site Description The Site consists of approximately 50 acres of land located between the Teichert Aggregate and RMC Pacific Materials aggregate mining operations in Tracy, California (Figure 1). The Site is located at 29425 South MacArthur Road (Section 9, Township 3 south, Range 5 east of the Mount Diablo Base Meridian) (Ecology & Environment, Inc. [EEIj 2002). The Assessor's Parcel Number (APN) for the Site is 253-120-26. The Site is a former gravel quarry, with associated surface topography consisting of irregular hills and gravel pits. The surrounding natural grade is approximately 60 feet higher than the gravel pits within the Site (Figure 2). Land within 1,000 feet of the Site is typically used for mining aggregate material such as gravel and other surrounding land is left as unused open space. There is a gunite-lined ii irrigation ditch adjacent to the east side of the project site that transmits fluctuating volumes of water throughout the year. ' I 1.2 Site History Approximately 7 million tires were illegally stored in 34 distinct piles located in gravel pits at the Site (Figure 2; EEI 2002). Waste tire materials in these piles caught fire in 1998 and burned for approximately two years, leaving behind tire waste materials. Material burned in the fire included drums of used oil filters, abandoned vehicles, trailers, and other miscellaneous equipment and debris. The fire began at the facility on August 7, 1998, and the remaining smoldering patches were extinguished by a subcontractor under the direction and supervision of the CIWMB during December 2000. ' I I TTF QMR Q2-03 FINAL(7-28-03):IEE Page 1