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U-Haul#709-50 Preliminary Site Conceptual Model Slaes Environmental December 15,2006 During the meeting, the Health & Safety Plan was reviewed and discussed by all personnel The field program was conducted in strict adherence with the provisions described in the Health& Safety Plan A copy of the Health & Safety Plan is included as Appendix G 323 Cone-Penetrometer„Soil Sampling On March 7'h and 8`h, 2006, Blaes Environmental utilized a 25-ton CPT drill rig provided by Gregg Drilling, located in Martinez, California, to drill and sample two soil borings (DP-7 and DP-8) to a depth of approximately 150 feet bgs (Figure 3) Soil boring DP-7 was located near the center of the foriner USTs and used to define the vertical extent of hydrocarbons in the area Soil boring DP-8 was located south of the former western dispenser area and used to define the lateral and vertical extent of hydrocarbons in the area The approximate location of each boring is shown in Figure 3 Soil samples were collected from soil boring DP-7 at depths of approximately 125 and 150 feet bgs and from soil boring DP-8 at depths of approximately 20, 40, 60, 80, 100, 125, and 150 feet bgs Each soil sample interval was approximately 12 inches in length Recovered soil was contained in two one-inch diameter by six-inch long brass sleeves The lower-most sleeve was promptly sealed, labeled, and stored in a cooler with ice pending on-site laboratory analysis by TEG, Inc The upper sample sleeve of soil was used for soil descriptions according to the Unified Soil Classification System and photo-ionization (PID) screening of the soil Soil descriptions, sample intervals, PID readings, and other information were noted on an exploratory soil boring field log and included in Appendix H Soil samples collected for laboratory analysis were logged on a chain-of-custody and submitted to the on-site mobile laboratory 32.4 Soil Sample Laboratory Analysis All soil samples were analyzed for the presence of total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethyl benzene, and total xylenes (BTEX), and 1,2-DCA, 1,I-DCA, tett-butyl-alcohol (TBA), methyl-tett-butyl-ether (MTBE), di-isopropyl-ether (DIPE), ethyl-tert-butyl-ether (ETBE) and tert- amyl-methyl-ether (TAME) 1,2 dibromoethane (EDB) using EPA Method 8260B Two soil samples from soil borings DP-7 and DP-8, one at the lowest sample depth and one with the highest field PID readings, were also analyzed for lead content 32.5 Soil sample Analytical Results Laboratory analytical results indicated that TPHg and all other VOC analytes were not detected above laboratory reporting limits for soil sample DP7-125' Only total xylenes were detected in soil sample DP7- Page 9