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Ia <br /> M/N4GEfl5 DESWNEflStONSULiulfS i - <br /> I� <br /> 2.0 FIELD INVESTIGATION <br /> 2.1 PERMITS AND NOTIFICATION , <br /> 1 <br /> Drilling permits will be obtained from San Joaquin County'PHS. PHS will',be notified prior to <br /> subsurface activities. J f <br /> 2.2 UTILITY CLEARANCE <br /> Underground Service Alert (USA) will be notified at least two working days prior to any <br /> subsurface activities at 1-800-227-2600. Drilling locations �ill be marked with white paint prior <br /> to notifying USA. USA will notify its member organizationsIl which includes most major <br /> subsurface utility providers. The individual utility providers will mark the locations of their <br /> underground:utilities on the sidewalk and street adjacent toi the site. <br /> ' Sampling locations will be cleared of subsurface obstructions by hand auguring to 5 feet bgs or <br /> until undisturbed native soil is encountered prior to using the direct push rig. <br /> ii <br /> QI 2.3 FIELD INVESTIGATION PROCEDURES <br /> 2.3.1 Soil Sampling <br /> Four locations will be sampled using a direct push rig to determine the vertical and horizontal <br /> extent of soil':'contamination.. SB-1 will be located over the center of the former UST excavation <br /> to determine the maximum vertical extent of soil contamination. Soil samples will be collected <br /> at 7 feet (the:depth of the base of the former excavation) I'Ii d every 5 feet to the groundwater <br /> table. The 7-foot soil sample and two consecutive nondetect, as determined by field screening <br /> 1 <br /> instruments, soil samples will be submitted for laboratory analysis from SB-1. j <br /> SB-2 will be located down gradient, SB-3 will be located up gradient, and SB-4 will be located <br /> cross gradient of the former UST excavation. These locations will be used to determine the <br /> horizontal extent of soil contamination. Soil samples will be collected every 5 feet to the I <br /> I groundwater table. Two soil samples will be submitted for laboratory analysis from each of <br /> these borings° <br /> i � <br /> t <br /> LIPROJECfS\PEPBOYS.WP 2 Jw fy 1997 ` <br />