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k9 KLEINFELDER 6.5. GENERAL SOIL SAMPLING AND HANDLING METHODOLOGY Soil samples will be collected and analyzed in general accordance with Kleinfelder's standard protocols for sampling and analyses for a PEA, which are included in Appendix B. Samples will be handled in accordance with approved procedures specified and generally as summarized below. Due to limited access of proposed soil sample locations, Kleinfelder proposes soil samples will be collected either by hand augering methods or by pushprobe soil sampling techniques (Geoprobe). Concrete will be removed at each proposed sample location using a professional concrete coring company. The minimum core diameter will be 4-inches. Any additional surface debris will be removed with a clean hand trowel (surface samples) or hand augering/pushprobing to the desired sampling depth for deeper soil samples. The soil samples will be collected at the locations depicted on Plates 3 and 4, although actual sampling locations will be dependent on access, surface conditions, and potential interference with subsurface utilities. Pushprobes will be advanced using a pneumatically driven steel probe. Soil samples will be obtained by inserting a sample barrel, lined with acetate liners, into the probe. The sample barrel will be lowered to the desired sampling depth and driven into the soil. Hand auger soil samples will be collected by slide hammering a 2-inch diameter by 6- inch long stainless steel tube into the soil at the desired sampling depths. During the advancement of the borings, soil samples will be continuously collected for lithologic classification and qualitative field screening will be conducted with a Photo Ionization Detector (PID). The PID measures ionizable compounds in air in parts per million by volume (ppmv). Lithologic classification will be based on the Unified Soil Classification System (USCS). The stainless steel hand auger, trowel, sampler, sample tubes and downhole pushprobe equipment will be cleaned between locations with a Liquinox® (laboratory- grade detergent) wash followed by a potable water and distilled water rinse. The stainless steel tubes and or acetate liners used for collecting the samples will be sealed following collection of the samples with Teflon° sheeting and tight-fitting plastic end caps. After collection, the soil samples will be labeled, logged on a chain-of-custody form, and immediately stored in an iced cooler pending transportation to the analytical laboratory. The soil samples will be transported under chain-of-custody control to Kleinfelder's office and then transported by courier in a chilled container to California Laboratory Services (CLS) of Rancho Cordova, California. The chain-of-custody form will be signed by each individual who handles the samples, including the sampler and the receiving employee at CLS. CLS is certified by the State of California to perform the analyses requested. The samples will be analyzed on a standard 15-day turnaround schedule for completion 57252.T02/ST05R9991DH:ly Page 18 of 29 ©2005 Kleinfelder, Inc. September 1, 2005