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1 Existing Nestle Warehouse 4343 East Freemont Street ' Stockton, California Project Nos. 2E-940917 and 2G-941101 Page 4 3.2.2 Limited Phase II Environmental Site Assessment ' A total of seven (7) test borings will be drilled as part of the Limited Phase H Environmental Site Assessment. Soil samples and data recovered from these seven (7) test borings will also be used for geotechnical purposes. These seven (7) test borings will be drilled in the following areas. ' Site Area Number of Borings Depth (ft.) Rail Spur Areas 4 10 North Fill Area 3 10 to 15 ' Soil samples would be collected from these test borings using the standard penetration (SPT) method or the modified California sampler using brass rings and/or stainless steel sleeves. Soil samples collected with the SPT sampler will be split within 1/2 of the sample stored in a 4 ounce laboratory approved glass jar with a teflon lined lid and remainder of the sample will be used to fill an 8 ounce clean glass jar with a metal cap approximately 1/2 full for use during a ' PID vapor scan. Soil samples collected with brass or stainless steel sleeves using the California sampler will be capped and sealed and a portion of these samples will also be placed in a 8 ounce glass jar approximately 1/z full for later use during the PID scan. ' Following completion of the test borings drilled for the Limited Phase H Environmental Site Assessment, each of the test borings will be backfilled with a cement bentonite grout as ' previously discussed for the geotechnical borings. These borings will also be capped using concrete and/or soil depending upon their location similar to that for the geotechnical borings. The proposed locations of the borings drilled for the environmental site assessment are identified ' on the attached Figure 1, Proposed Boring Location Plan. These environmental borings are identified as Boring Nos. El, E2, etc. ' 3.2.3 Decontamination All drilling equipment and sampling tools will be decontaminated prior to mobilization ' to the site. The drill rig and augers will be decontaminated using a high pressure steam cleaner. Sampling tools will be decontaminated on-site using trisodium phosphate soap followed by ' double rinsing and dionized water. Sampling equipment will also be decontaminated between each sampling event and the augers will be steam cleaned between borings. Where potential subsurface contamination is identified, wash water will be contained and drummed for on-site tstorage.