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LEVINE-FRICKE <br />CONSULTING ENGINEERS AND HYOROGEOLOGISTS <br />April 3, 1989 <br />Mr. David Brent <br />California Regional Water Quality Control Board <br />3443 Routier Road <br />Sacramento, California 95827 <br />Subject: Permit Application - WDR <br />Southern Pacific Pipe Line <br />Holt, California <br />Dear Mr. Brent: <br />APR G 1989 <br />ENVIRONMENTAL HEALTH <br />PERMIT/SERVICES <br />As part of the schedule for ground-water remediation at the <br />subject site, enclosed are: 1) application forms for "Report of <br />Waste Discharge"; 2) Figures 1 and 2, depicting ground-water <br />treatment and discharge; and 3) a check for $1,000 for permit <br />fees. It is my understanding that the enclosed permit fee of <br />$1,000 will cover the WDR and NPDES permits for this site. <br />The treated ground water will be discharged to Trapper Slough as <br />shown on Figure 1. Trapper Slough consists of a man-made channel <br />connected to the Delta waterway system by culverts. This slough <br />is not a navigable channel, and the surface water is not <br />considered to be a potable water source. This slough does not <br />have a boat launch ramp or a swimming beach. <br />Ground water will be treated as shown on Figure 2. The treatment <br />system is designed to process 10,500 gallons per day as a maximum <br />flow rate. Two large treatment tanks (each having a 21,000- <br />gallon capacity) will allow a retention time of four days within <br />the system. Aeration and recirculation will remove volatile <br />organic hydrocarbons (VOCs). Activated carbon polishing will <br />further reduce VOC concentrations in the treated ground water. <br />Treated ground water will not be discharged into the slough until <br />testing establishes the effectiveness of the treatment system. <br />We have evaluated four alternatives for the discharge of the <br />treated ground water and recommend alternative D, discharge of <br />the ground water to Trapper slough. Each alternative is <br />discussed below. <br />A. Subsurface reinjection or recharge <br />This option would not be feasible due to the shallow <br />water-table conditions next to the slough and the impact <br />upon the adjacent property owned by Arcady Oil. <br />1900 Powell Street, 12th Floor <br />Emeryville, California 9.608 <br />-1- <br /> (415) 652-4500 <br />Other offices in NEWPORT BEACH and OAKLAND, CA