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i <br />Leak Monitoring Plan <br />Underground Storage Tank Facility ; <br />Facility Mobil Service Station #787 <br />950 West 11th Street, Tracy 95376 <br />Tankowner - Desert Petroleum, Inc. <br />2060 Knoll Drive, Ventura, CA 93003 <br />P.O. Box 1601, Oxnard, CA 93032 <br />Tank Facility Description <br />Three underground storage tanks, one of 10,000 gallon, one 7,500 <br />gallon, and one 5,000 capacity. All tanks are 1/4" single walled <br />carbon steel with 2" galvanized product piping. Storage does not <br />have secondary containment or cathodic protection at present. <br />The current and past materials stored are motor fuel gasolines. <br />There have been no unauthorized product releases detected in the <br />past. Product piping from the storage tanks is pressurized and <br />is equipped with in-line leak detectors. An existing waste oil <br />tank is 280 gallons. This tank is to be removed. Preventive <br />maintenance is scheduled for the existing underground tanks and <br />product piping by replacing the present galvanized piping with <br />new 2" fiberglass. The storage tanks are to be relined with an <br />approved epoxy fiberglass lining prior to installing monitoring <br />equipment. <br />Pr222sed Monitoring System <br />1. The monitoring alternative selected from State Monitoring <br />Alternatives for Existing Fuel Tanks is number 6. The monitoring <br />plan proposed consists of: <br />a. Vadose Well Monitoring <br />b. Inventory Reconciliation <br />C. Tank Testing <br />d. Piping Leak Detectors <br />e. Overspill Protection <br />Vadose Monitoring System and Inventory Reconciliation <br />We request approval of a Vadose Well Monitoring System using <br />electronic probe detection along with a product line monitor <br />produced by Redjacket Electronics (Marley Pump Company). The <br />probe system is programmed in parts per million threshold levels <br />for each probe and has an alarm that displays ppms present. The <br />system features a visual and audible alarm with an alarm memory. <br />