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Containm*By Design • Rustproof—Inside and Out And of course, Fiberglas tanks are rustproof, inside and out, on all four surfaces of the inner and outer tank. Most corrosion protected steel double-wall tanks are still vulnerable to rust. Although there is corrosion protection on the tank's exterior surface, few double-wall tanks have internal rust protection on the three bare steel interior sur- faces. A recent survey 1 leaking steel tanks revealed that 29% had perforations due to internal corrosion. Remember, steel can rust. The OIC TANKS Double- Award for Achievement in Fiberglas®never will! Wall Tank: Engineered for Product Safety Maximum Safety Our double-wall tank design Continuous Precision Fiberglas®tanks have a and monitoring system is so Tank Testing reputation for safe contain- unique, it earned the National All of the Fiberglas tanks in ment. They have been proven Safety Council Annual Award this catalog feature a "built- in over 175,000 installations for Achievement in Product in" Hydrostatic Tank Monitor. over the past 25 years. Safety in 1985. O/C TANKS recommends this Some industries, municipali- High Strength Construction monitoring method because cf its superior leak detection ties, counties and states are Our Fiberglas double-wall tank now specifying underground is not just another tank within capability. storage systems with second- a tank. Special high strength The Hydrostatic Tank Monitor ary containment for maximum Fiberglas ribs bond the inner can also serve the dual pur- protection of their natural under- and outer tank walls together pose of a precision tank test. ground water supplies against to form a unique structural This device has been indepen- petroleum contamination. system. dently tested and validated to After extensive development 360-Degree Secondary detect leaks as small as 0.05 and testing, O/C TANKS has Containment gallons per hour; this exceeds engineered an integrated Although some tank manufac- the leak detection criteria of double-wall tank with a "built- turers cut corners and exclude by gallons per hour established in" continuous leak monitoring secondary containment around tthe federal EPA for precision o system for assurance of safe the top of the tank, all Fiberglas testing equipment. petroleum containment. double-wall tanks provide full And when it comes to leak 3600 secondary containment detection and precision tank of the primary tank. Partial" testing, this system is the best double-wall tanks are more because it's continuously moni- susceptible to leaks compared toring the complete inner and to tanks which offer complete outer tank! secondary containment. The American Petroleum Institute Our double-wall tank also has ing tanks, nks, confirmed that 7%(APIin a 1981 study of le the design flexibility to accom- of tank leaks occur in the modate other leak monitoring upper quadrant of an under- systems. If another type of tank ground tank. monitor is specified initially,the Hydrostatic Monitor can still Compatible With Alcohol be activated at a future date. Fuels Since the federal EPA requires secondary containment for cer- tain alcohol-blended fuels— such as M85(85%methanol)— our double wall Fiberglas tank includes alcohol compatibility as a standard feature. 2