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...uxo RcvQ.SRowx JR. <br /> E <br /> Wo <br /> .......... J My oxvE RooPxonnrox <br /> Water Boards <br /> Central Valley Regional Water Quality Control Board <br /> 21 June 2012 <br /> Mr. Mark Chandler <br /> Time Oil Company <br /> 2737 West Commodore Way <br /> Seattle,WA 98199 <br /> SITE CHARACTERIZATION WORK PLAN, TIME OIL STOCKTON TERMINAL, 3015 NAVY <br /> DRIVE, STOCKTON, SAN JOAQUIN COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Central Valley Water <br /> Board) staff reviewed the 18 May 2012 Site Characterization Work Plan (Work Plan) submitted <br /> by Environmental Technologies Group (ETG) on behalf of TOC Holdings Co. (TOC)for the <br /> former Time Oil Company terminal at 3015 Navy Drive in Stockton (Site). The Site operated as <br /> a petroleum hydrocarbon storage facility from sometime prior to 1968 until 1996 and is currently <br /> operated by NuStar Energy for the storage and distribution of ethanol fuel. TOC is part of the <br /> Stockton Terminals Technical Committee (STTC), which is responsible for addressing the <br /> dissolved plume beneath the Site. <br /> TOC prepared the Work Plan to better assess petroleum hydrocarbons in soil and groundwater <br /> due to the limited soil and groundwater data available at the Site. The Work Plan proposes the <br /> following: <br /> Drill 30 direct push soil borings around the northern and western portions of the tank <br /> farm and collect soil samples at 2.5 feet below ground surface(bgs), 5 feet bgs, and <br /> 0.5 to 1 foot above the water table. <br /> Drill 15 direct push soil borings around the loading racks and pump manifold area and <br /> collect soil samples at 2.5 feet bgs, 5 feet bgs, and 0.5 to 1 foot above the water table. <br /> Drill 25 soil borings to one foot bgs within the former tank farm area. <br /> Drill and install 16 monitoring wells in the B, C, and D zones near existing shallow zone <br /> wells. <br /> Central Valley Water Board staff concur with the installation of 70 soil borings and 16 <br /> groundwater monitoring wells at the Site as proposed in the Work Plan. By 30 August 2012, <br /> TOC needs to drill the soil borings, install the 16 monitoring wells, collect and analyze soil and <br /> groundwater samples, and submit a report of findings. The report of findings needs to include a <br /> summary of the field work, figures showing sample locations, tables of analytical data, and an <br /> estimate of the mass of petroleum hydrocarbons remaining in soil and groundwater. <br /> KARL E. LONOLEY SOD, P.E.,CHAIR I PAMELA C. CREEOON P.E..BCEE,EXECUTIVE OFFICER <br /> 11020 Sun Center Odva X200.Rancho Cordova.CA 86670 www.wamr0oeraE.ca.gov/centralvallay <br /> `$RECYCLED PAPER <br />