ARCHIVED REPORTS LIMITED SOIL ASSESSMENT AND TEST PIT EXPLORATION

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' k4 KLEINFELDER ' samples were also collected by pushing a 2-inch diameter by 6-inch long stainless steel tubes into the soil. The stainless steel sample tubes were cleaned before each use with a Liquinox® (laboratory-grade detergent) wash followed by a potable water and distilled water rinse. The soil samples were sealed with Teflon° film and plastic end caps. With the exception of the western perimeter Test Pits TP5 (western property boundary), the vertical extent of debris was not reached at maximum explored depth of 15 feet. The lateral extent of debris was also not defined by the test pits alone. The estimated aerial extent of debris is shown on Plate 2. Debris areas north of TP12 have been extrapolated based on the surface conditions in which the topography is elevated as ' compared to the offsite orchard area to the west. Surface topography between TP8 and approximately TP4 near the western border is estimated at 5 to 6 feet above grade of the bordering property. North of TP4 the topography gradually decreases to the adjacent property grade, toward the extrapolated northern extent of fill (See Plate 2). Based on the amount of debris noted and discolored soil, it appears the greater concentration and amount of debris is located near the eastern border of the Debris ' Area in proximity to the western stands (eastern border of debris area). The vertical extent however is mostly unknown in almost all the test pit areas due to the maximum excavation capability of the backhoe of 15 feet. 4.4 SAMPLE HANDLING AND CHEMICAL ANALYSES After collection, the soil samples were labeled, logged on a chain-of-custody form, and immediately stored in an iced cooler. The samples were transported in a chilled ice chest under chain-of-custody control to Kleinfelder's office and to Precision Enviro-Tech Analytical Laboratory (Precision) of Stockton, California. The chain-of-custody form was signed by each individual who handled the samples, including the sampler and the ' receiving employee at Precision. Precision is certified by the California Department of Health Services to perform the requested analyses The samples were analyzed on a standard 15 working day turnaround schedule for completion. Laboratory data sheets and chain-of-custody forms are included in Appendix C. 58671.E02/ST05R1127/DH:ly Page 12 of 22 ©2005 Kleinfelder, Inc. September 15, 2005