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f Recommended Practces for Installation of Underground Liquid Storage Systems Piping is tight. but any loss in gauge pressure tyhirh could cau ;c a release or pernut a rcicase to should he carelully imestigated . In general , test go undetected or uncontained , at the nianulaclureCs recommended ptessuies . In Some lield-installed cathodic protection xtill he lieu of specified pressures , adhere to the l'ollowing limited to piping and associated components that procedures and Table I -t -? : ore not protected by a f;icturyeinstallet] cathodic- I or lihcrglass %econdar% -containment piping that protection .% stent provided with the tank . Pip 'Intl operates at atmospheric pic %%ure and uses runt - and other components ma) lie electrica [ 13 isolated shell tenninafion fillings . test at 10 prig . If Ilex - from the tanks b% insulated flanges and hushinLTs , ihle teinimauon littimgs are used . test it j psits . In some installations . the tanks and piping ntay he • For Ilexrhlc secondary piping . test at prig , protected by a common cathodic• protection s % sicut . F- xpcct that a slight expan ; ion ul ' piping may 12 . 2 Applicability. These recontmendaiions are not occur tthitc the piping is under pressure • intended to tike the place of a detailed corrosion surxcy 11.2.2 Monitoring During Construction . Alier and a specihcull % engineered cathodic• proiection pleat , the initial lest . psi, ul' air presuur rosy he main These ware genral recomnnndations Ior routine instal , taitted in the secondary piping. Monitoring the air lotions liar tthich no specific Alam are arailahlr . 11 the pressure during suhscyucni Construction can pro- citrumsl .utrcs are unusual . either for the tank systern to t ide earl warning ol' piping damage . ll' dtunagc is he installed or the environment , consult a competent cor- suspected. retest the piping, rosittn engineer 11.2.3 Final Integrity Test for Secondary Pipe 12.3 FactoryInstalled Systems for Tanks . Handle all ing. [ uunrdiately before placing piping in .ret ire . components %% ith rare to prevent danra►ge during instal- rrpe;►I flu test procedure described in Section lation and backlilling . At the installation siteo inspect i 1 . 3 . 1 . ;caping any exposed jc» mus . Monitor the anodes , dielectric hushings . and coatings fur shipping pressure I'or I hour and imcstigate ails pressure and handling lamagr . Veril} the clecU' icaf continuity (otic . Aflcr testing is completed. loosen sand hark tuft. between the anodes and the lank . Repair damage it ) anode test tittincs lite systcru, larking continuous moot - connections war coatings according to the ntanul :► cturcr's toeing at each junction stump . For s� stcnts " here instructions . Do not reinow dielectric bushings 1 'ronl tank alt sumps are continuously monitored . leaning• openings. lest Fillings in place is ,in option . according to the peel- 12 ,4 Dielectric Coatings . Dielectric coating , isolate erence of the owner, the external stirl' ►ces of the tank and piping from the enVironnicnt and reduce current demand on the Cathodic- protection system throughout Ille Iife expectancy of the liyui (kstorage s) stem . I • acturt - ilist alled dielectric coatings nruy lie roakiar epoxies . enannl ; , lihergla, s- 12 . CATHODIC-PROTECTION reinforced plastic , or urethanes in liquid tonin . tape . or SYSTEMS extrusions . ( 'eating done under controlled conditions improves cltialitN control and ntinintiles detects . Limit field coaling to exposed threads . l'ittings . and arcus dant- 1.2.1 General Requirements . Metallic mderground aged tion handling and fabrication . storage tanks and product -pipe systems in contact tx ith , oil mtist he pro\ idea with calhodic protection . Tank and Comments pipe systcnts constructed ul' Small exPusc rorrusiun •retiistant nl;teria6 d surlaccs of coated structures ct ► r- do nut require additional cathodic protection . Cathodic rude rapidly, due to a high concentration of electivo- protectiun should lie installed in accordance %% ith the chernical activity. Cathodic protection is essential manufacturer ' % instructions . pleats . and specifications . In for protecting coating llatts tholidomst . the uhscnre cif , peril'ic plaits. the ti , llnaing procedures Selection ul a proper coating mateiial . preparation are ret:antnlended . al the surlare to he coated , and carr in application Comments are essential . Coatings tolls maintain high dielec • n'ic properties over the lilt• of' the system . ha\ e lo« • The "tank M stem " incladc; the lank . piping , and moisture absorption and transfer rates. and hm e che - relaled egUiptnent. the failure ttf any component of icall } resistant to the Stored Iit.Rlids . Field-applied JUL pei . o�g �� 6 2019 l= NVIRONMENTAL HEALTH