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kq KLEINfELDER 9. In all proposed boring locations, field indications of potential soil contamination (discolored soil, elevated PID reading and/or unusual odors) may be used to modify the sample interval to be submitted for analyses. At least one soil sample per boring will be submitted for analyses. Modifications in sampling depths and analyses will attempt to be relayed/verbally discussed with the DTSC project manager or supervisor prior to analyses. Analyses with short hold times (Cr+6) however will require a relatively quick decision in the event DTSC personnel are not readily available. 10.Four background soil samples are proposed to be collected at each of four borings at depths of 5 feet bgs. Each of the four discrete background soil samples are proposed along the eastern border of the site near a vacant field. If right of entry can be acquired, soil sampling is proposed offsite and approximately 75 east of the eastern property boundary. These areas were mapped as the same soil type as the general site area (Jacktone-Urban land complex). The northern boundary and western boundary were not proposed due to a nearby differing soil type mapped adjacent north (Urban Land Complex) and Stanislaus Street and industrial development to the west. 11.Groundwater is not expected at the proposed soil sampling depths. However, if groundwater or perched water is encountered a grab groundwater sample will be collected for potential analyses. DTSC will be contacted if groundwater is encountered for potential additional analyses. 6.2. PLATING ROOM AND BACKGROUND SOIL SAMPLING AND ANALYSES A total of 82 discrete soil samples will be collected from 26 locations in the Plating Room (Plate 3) and 4 background locations (Plates 2). Three soil samples will be collected from each of the 26 Plating Room sample locations and one sample will be collected from each of the background soil sample locations. Soil samples in the Plating Room will be collected at depths of 0 to 12 inches (At interface between concrete/aggregate base and soil), 42 to 48 inches and 90 to 96 inches bgs at each sample location. The background soil samples will be collected along the sites eastern property boundary at a depth of 60 inches bgs. The surface soil samples in the Plating Room will be initially submitted for analyses and the subsurface soil samples put on hold pending the surface soil sampling results. Field indications of potential soil contamination (discolored soil and or unusual odors) may be used to modify the sample interval to be submitted for analyses. The sample locations in the Plating Room are proposed based on former bath tank locations and past use. Most locations are biased locations beneath the former tank locations, one in a small hazardous waste storage area, two in random locations between tanks and one near a hose line between tank locations. 57252.T02/ST05R99g/DH:Iv Page 14 of 29 ©2005 Kleinfelder, Inc. September 1, 2005