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I k'q KLEiNFELDER i 6 SITE RECONNAISSANCE 6.1. METHODOLOGY AND LIMITING CONDITIONS Ms. Laura Voss, Kleinfelder Staff Geologist, conducted a site reconnaissance on April 11, 2005 "-; to assess and photograph present site conditions. The approximate site boundaries are shown on Plate 2, "Site Map," and color photographs of the site are presented on Plate 4 (Appendix A). The site conditions discussed below are limited to readily apparent environmental conditions observed. -� 6.2. GENERAL SITE SETTING 1 ` The site is the southernmost property on the eastern side of the undeveloped road that extends south from Grant Line Road near the San Joaquin-Alameda County border in Tracy, California (APN 209-07-26). The site encompasses approximately 13 acres and is bisected by a stream that !r trends in a southwest to northwest direction. Currently the site is a fallow field with a residence, garage, and shed located adjacent and west of the site (20058 W. Grant Line Road). '-- The approximate 12 acres of the site is a fallow field. A stream trends northeast to southwest across the center of the site. A culvert for the stream runs under the unnamed road. An AST that appears to be used for water is located near the eastern border of the site. No leaking, staining, i or stressed vegetation was observed around the tank. Adjacent to the site to the west is a rural residence (20058 W. Grant Line Road) with a garage to the south and associated yard is located along the undeveloped road adjacent to the northwest corner of the site and comprises approximately I acre. East of the garage is a shed. The majority of the yard appears to be used as a driveway for farm vehicles and trailers, and numerous vehicles are parked in this area. Two cars are parked west of the residence, a boat is parked north of the residence, a tractor is parked southwest of the garage, and numerous trailers are parked around the onsite structures. Where the yard is not used as a driveway, it contains numerous debris piles. Ash piles that appear to be burn piles are located east of the shed. The burn pile closest to the shed also has a metal burn can with ash and debris in it. Two 55-gallon drums were observed onsite, one west of the residence and one north of the garage. Both drums were unlabeled and laying sideways. The drum west of the residence is plastic. The opening of the drum was not covered and it was less than '/4 full. .Some staining was observed around the opening of the drum and on the side of the drum. The drum north of the garage is metal and rusted. It is split in half vertically, but no leaking or staining was observed on or around it. An approximately 5-foot tall soil pile is located in the southeast corner of the yard. The pile is j Foi: overgrown with grass and appeared circular. A fire hydrant is located near the northwestern corner of the reside 4} 55568.P01/ST05R488R/LTV:Iv Page 19 of 30 ©2005 Kleinfelder,Inc. June 1,2005 �"ti