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Mr. Gerald Djuth <br /> Page 2 of 3 <br /> Ground Zero personnel inspected the spill site on February 24, 2009. No visible or <br /> olfactory evidence of diesel was observed in soil at the spill location or in rainwater <br /> puddles near the spill site. <br /> Based upon the small quantity of diesel released, the initial spill abatement actions, the <br /> local hydrogeology and the likely attenuation of any small amount of residual <br /> hydrocarbons in ballast or soil we concluded that no further action was necessary to <br /> protect surface or groundwater beneficial uses. This conclusion was submitted to <br /> RWQCB in a letter report dated March 19, 2009. RWQCB responded by letter dated <br /> May 6, 2009 wherein they requested a workplan to collect and analyze site soil samples <br /> and evaluate drainage patterns at the site (Attachment A). <br /> Workplan <br /> Ground Zero proposes to collect and analyze a number of shallow soil samples within <br /> and adjacent to the spill area in order to characterize current conditions and evaluate the <br /> potential threat to surface or groundwater beneficial uses. At least one sampling location <br /> will be located up-drainage from the spill and at least one location will be down-drainage <br /> from the spill. <br /> Permitting and Utility Clearance <br /> It will be necessary to obtain a right-of-entry agreement from UPRR prior to conducting <br /> the investigation. Due to the shallow depth of the proposed borings (3 feet), drilling <br /> permits from SJEDH will not be required. Prior to beginning the field investigation, the <br /> proposed locations will be marked and underground utilities identified by contacting <br /> Underground Service Alert. <br /> Soil Sampling <br /> A hand auger will be used to advance four shallow soil borings at the approximate <br /> locations shown on Figures 2 and 3. The soil samples will be collected in clean brass <br /> tubes contained in a drive-sampler attached to a hand auger. Samples will be obtained <br /> from depths of approximately 6 inches and 3 feet below grade at each location. The brass <br /> tubes will be sealed with Teflon® tape, capped, uniquely labeled, and stored in an ice <br /> chest refrigerated to a temperature of approximately 4°C for shipment under chain of <br /> custody protocol to a California certified hazardous waste testing laboratory. Upon <br /> completion the borings will be backfilled with cuttings. <br /> Laboratory Analysis <br /> Each sample will be analyzed for total petroleum hydrocarbons as diesel (TPHd) by EPA <br /> Method 8015M. Any sample exhibiting a detectable concentration of TPHd will also be <br /> analyzed for benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA Method <br /> 8021B. <br /> G:\GROUNDZEkANDRADE\REPORTS\SSWorkplan.doc <br />