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• • 0 Models: G-5, G-6, DWT -2, DWT -Type 1, DWT -Type 11 10,000 Gallon Tanks (8 Ft. Diameter) (Actual Capacity 9,728 gal) Fiberglas R Tanks for Fuel Storage Calibration Chart* How to properly gauge your tank:... Underground storage tanks require periodic measurementto determine cur- rent inventory level. Using the proper methods when gauging your tank's con- tents will i nsure the most accurate reading and insure that you do not damage your tank. The following procedure should be followed whenever you use a gauge stick to determine the amount of product that is in your tank: 1. Use a wood dipstick with a rubber or nylon tip. Metallic dipsticks are not recommended. This will insure that fre- quent tank gaugings or an accidental dropping of the gauge stick into the tank will not damage the tank bottom. 2. Always gauge your tank at the fill port. Atank bottom protector plate has been installed under this portto help protect thetank. 3. Slowly lower your gauge stick into the fill port until it touches the tank bottom. Never free drop the gauge stick. This can result in inaccurate measurements due to product splashing. Free dropp- ing can also result in gauge stick damage and tank damage. 4. Remove your dipstick slowly and read the product level directly from the gauge stick. Water Paste Detection To detect water in the tank bottom, water detection paste is available from petroleum equipment distributors. However, some water detection paste cannot detect antifreeze mixtures. If antifreeze mixtures are used for the cavity monitoring fluid, the following product is capable of detecting water or antifreeze (brine or up to 50 percent glycol) solution in the tank water bottoms: WATER FINDER #7686-1870 DAYCO/NATIONAL Dayton, OH (513) 226-5879 Caution Pressurized deliveries are not recom- mended. If the delivery vehicle uses pumps to fill the tank, install overfill shut- off equipment in the tank and truck to pre- vent the tank from being overfilled. Over- filling the tank under pressure will damage the tank even if the tank vent is unrestricted. For Model DWT -2P double-wall tanks only, the annular space capacity for this tank is 580 gallons.