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TABLE 8 PROPOSED BORING OBJECTIVES MOUNTAIN HOUSE DEVELOPMENT SITE#6 Mountain House, San Joaquin County,California Target Maximum Sample Sample Depth' Depth HHRA General Area Proposed Borings Media (feet bgs) (feet bgs) Soil Sample Minerals A to define lateral and vertical extent of affected soil and gw cross gradient of S13-9 soil/gw 26-36 36 Yes No I B to define lateral and vertical extent of affected soil and gw cross gradient of SB-10 soil/gw 18-36 36 Yes No C to define lateral extent of affected soil southwest of SB-11 soil 16 16 Yes No D to define lateral extent of affected soil northeast of SB-15 soil 19 19 Yes Yes E to define lateral and vertical extent of affected soil and gw cross gradient of SB-16 soil/gw 23-34 34 Yes No F to define lateral and vertical extent of affected soil and gw cross gradient of SB-13 soil/gw 20-27 28 Yes No 2 G to define lateral and vertical extent of affected soil and gw down gradient of SB-16 soil/gw 23-34 34 Yes No H to define lateral and vertical extent of affected soil and gw down gradient of SB-18 soil/gw 20-28 28 Yes No I to define lateral and vertical extent of affected soil and gw down gradient of SB-13 soil/gw 20-27 27 Yes No J to define lateral and vertical extent of affected soil and gw down gradient of S13-5 soil/gw 13-24 34 Yes No K to define lateral extent of affected soil northeast of SB-21 soil 5-28 28 Yes No 3 L to define lateral extent of affected soil northeast of SB-21 soil 5-28 28 Yes Yes M to define lateral extent of affected soil northeast of SB-22 soil 5-31 31 Yes No Abbreviations: bgs=Below ground surface gw=Groundwater HHRA=Human Health Risk Assessment Notes: 1. Target soil sample depth based on previously identified affected areas. 2. Maximum depth explored may vary based on field observations. 3. Soil samples for HHRA to be collected from 0 to 10 feet bgs. Fiom Science to SoWtimrs Page 1 of 1