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07/14/2010 1422 containment solutions (FAX•-145425020 P.0081008 <br /> Double-Wall Tank <br /> Monitoring System Hydrostatic Tank Moaanr <br /> Configurations 1.Use onlllroora epbtlian in rnldclimeto j.WTLEnne <br /> l Reserver <br /> uses concrete S;nspr <br /> Y alfk <br /> 1,Use hollow sphere kit to control eunpo. Pad stable Ftmer dr <br /> ration In and environments. L1quld LovN <br /> 3. Maximum lank burlal depth V below <br /> II from lank fop, <br /> a.The mpnlmring cnvily must be vented Stored <br /> to the atmosphere.The optional reser- Iroduct <br /> volr sensor supplied try O/C Tonka Is <br /> designed to oulomnlienpy vent the <br /> monitoring envlly, <br /> Double wap <br /> `uodergmNxlTar* <br /> Liquid Sensor Monitoring systems <br /> (Dry Annular Space): Concrete <br /> Typlem eonllgurntien lot an electronic Pad Plan Pipe <br /> 5oneor or manual dipstick. <br /> N,ta: �s'°i <br /> Hydrostatic Tank Monitor <br /> 1. Monitoring cavity can ba vnnlntl to Reservoir i <br /> O/C TANKS recommends atmosphere or Bested. <br /> the Hydrostatic Tank Monitor <br /> versus other methods because <br /> of Its su erior leak detection 1 er � <br /> P ^ <br /> capability(see performance i <br /> comparison on the next page). Dry N,mugr <br /> / I 3 nsing�he I <br /> AI ate Tank Monitoring — ---- <br /> /// Systems <br /> / The riberglas double-wall <br /> I/ tank is designed to accommo- <br /> date other leak monitoring vacating and Air Pressure <br /> systems. If another type of Monitoring Systema(Dry Corrrme \veouum or <br /> i <br /> Annular Space): Pad AlrPressure <br /> tank monitor is specified Notes: Riser sena« <br /> initially, the Hydrostatic Mon- �.Maximum conuretpus pnahwe ca area. Pip, big Is., <br /> itor can still be activated at a etre Is 3 pal. Mir <br /> future <br /> future date. Y.Maximum oaminupax vecuum is <br /> 3-memory(15 pal maximum).Tank <br /> burial tlnplh rrdriciad la 3 lest i F <br /> An alternate tank monitoring maximum. ; <br /> sensor can be located at any x r. <br /> monitoring fitting on the tank <br /> top. However, to provide max- <br /> imum future flexibility, locating <br /> the tank sensor through the �. <br /> fitting in the Fiberglas Reser- <br /> voir will permit the tank owner <br /> to more economically retrofit the GasollnaVapor Sensor <br /> tank to activate the Hydrostatic Monitoring 9yatems(Dry <br /> Tank Monitor for torture use. Annular Space); PoQoreta Plate pipe <br /> Many vapor season elan Include a water <br /> nannol: Fibbrglas" <br /> The space between Inner and Nota: Reservoir <br /> outer tank wall Is 1-1/8" for 1.Monitoring cavity can be seelad or Hydrocarbon <br /> vented to atmosphere. Vapor <br /> tanks 12,000 gallon capacity sensor <br /> and less;the cavity space is <br /> 1-314" for tanks 15,000 gallon <br /> capacity and larger. u <br /> As an optional accessory,O/C I water sensor <br /> TANKS can provide a factory <br /> Installed "drawstring" at the <br /> reservoir monitor fitting, to <br /> assist In positioning liquid <br /> sensors at the bottom of the <br /> annular Space. <br /> 11 <br />