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7B3 Kull ier(er P, M1r,ay--, g,,;P lUC <br />F POSd^4m, ~ a <br />dee er borin will be drilled using atruck-mounted drill rig a ui ed with six-or ei ht- vase-3, r <br />p 9 q PP 9 <br />inch hollow-stem augers. Soil samples will be collected every five feet starting at the pi 9zs aea , goo <br />depth at which the direct-push boring was terminated (rounded to the nearest 5 feet). f i ~'s'8~ sa3r <br />Based on boring logs from the Valero site across West Las Positas Boulevard from kleinfeldec<om <br />Fire Station No. 3, Kleinfelder expects to encounter the second water-bearing zone <br />at a minimum depth of 45 feet bgs. Drilling with ahollow-stem auger will be <br />terminated at 45 feet bgs, and a discrete groundwater grab sample will be collected <br />from the deeper water-bearing zone using a HydropunchTk' tool, or equivalent. <br />A Kleinfelder representative will oversee the drilling and sampling activities, and will <br />prepare a log of the soils encountered in each boring. Samples will be collected for <br />chemical analyses at each location. The soil samples will be screened in the field <br />using a photoionization detector (PID) to measure volatile organic compounds. In <br />the event that signs of impacted soils are observed (i.e., visual staining, odor, <br />elevated PID readings, etc.), samples from the impacted soil interval will be <br />collected. Sampling equipment will be decontaminated between sampling intervals. <br />We anticipate that two soil samples will be collected for chemical analyses at each <br />boring location. If there are no obvious signs of contamination, samples will be <br />collected at approximately 8 and 12 feet bgs, above anticipated groundwater at 25 <br />feet bgs. Soil samples wIU be retained in acefafe sampling sleeves. <br />A shallow groundwater sample will be obtained from the each of the five borings, <br />using temporary PVC screen and casing, or a Hydropunch. A discrete groundwater <br />sample will be obtained from the deeper aquifer in the deeper boring as described <br />above. Using a clean disposable bailer or dedicated polyethylene tubing, a <br />groundwater sample will be retrieved from each sampling location, and decanted into <br />clean containers provided by the chemical testing laboratory. <br />Sampling equipment will be decontaminated prior to use and between sample <br />intervals. Decontamination will be performed using either a steam cleaner or a <br />laboratory-grade detergent solution followed by a two-stage rinse with distilled or <br />deionized water. <br />Soil and groundwater samples to be chemically analyzed will be stored in a chilled <br />ice-chest and delivered to estate-certified chemical testing laboratory under chain- <br />of-custody protocol for the chemical analyses. <br />Sample Analyses <br />Kleinfelder proposes to submit two soil samples from each soil boring for chemical <br />analyses. One groundwater sample will be submitted from each shallow boring, and <br />two groundwater samples will be submitted from the deeper boring. The soil and <br />groundwater samples will be submitted to a state-certified chemical testing <br />laboratory under chain-of-custody protocol. <br />The soil samples will be analyzed using the following analytical methods: <br />01002PROP / (PLE8P294.doc) /jmk Page 3 of 9 November 11, 2008 <br />Copyright 2008, Kleinfelder <br />