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Page 3 of 6 <br /> 8. MONITORING PLAN: (continued) <br /> b. Tank Annular Space Monitor: This monitoring probe is located inside the annular <br /> space between primary and secondary container. Its function is to detect the <br /> presence of liquid in the secondary container. Should any liquid be detected, an <br /> audible and visual alarm will alert the Owner of a potential leak either from the <br /> primary to the secondary container or ground water intrusion into the secondary <br /> container. <br /> c. Monitoring of Sacraficial Anode: The sacraficial anode will be monitored by <br /> taking structure to soil voltage. Tank to soil potential readings will be taken <br /> with a high impendance voltmeter and a copper/copper sulfate reference electrode <br /> placed immediately above the tank in soil. A reading more negative than -850 <br /> millivolts indicates the tank is protected. When reading exceeds 'SAFE' , the <br /> sacraficial anode will be replaced and tank inspected and tested as required. <br /> d. Sub-pump and Tank Riser Monitor: This monitoring probe is located inside the <br /> containment box surrounding the tank submersible pump. Its function is to detect <br /> the presence of liquid in the Secondary Container. Should any liquid be detected, <br /> an audible and visual alarm will alert the Owner of a potential leak from the sub- <br /> PUMP <br /> e. Piping Secondary Contaiment Monitor: This monitoring probe is located inside the <br /> containment box surrounding the sub-pnp (gasoline tank) and waste oil pump out <br /> riser (waste oil tank) . Its funcition is to detect the presence of liquid in the <br /> containment box which could indicate a leak in the product piping or waste oil <br /> piping. If any liquid is detected, and audible and visual alarm will alert the <br /> Owner of a potential leak. <br /> f. Pressurized piping systems shall be monitored utilizing on line leak detectors. <br /> Operator is to be aware that reduction in product flaw to 3 + gallons per minute <br /> indicates a potential leak. Leak detectors will be tested yearly for proper <br /> operation. <br /> g. Records and Inspections - All records of underground tanks and petroleum piping <br /> shall be logged in writing using corresponding inspection log. Following is a <br /> list of monitoring activities and inspection which will be recorded. <br /> 1. weekly visual inspections shall be made of: <br /> - Submerged PLmp Boxes <br /> - Fill Boxes (also inspected after each delivery) <br /> - Reconcilation of the inventory control records <br /> 2. Annual inspection shall be made of: <br /> - Backfill monitoring wells at tanks with the use of a portable vapor <br /> sniffer; TLV or equal. Concentrations over 1000 PPM for gasoline or 300- <br /> 500 PPM for diesel will be reported in accordance with State and Local <br /> ordinance requirements. <br /> ROBERT H. LEE S ASSOCIATES <br />