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9 r3 <br />�oxx <br />9 HCp <br />rri axa 3 <br />H ZH <br />fG C] <br />H <br />ox0 <br />H <br />fn H <br />H C <br />PoA <br />OHd <br />W08 <br />�n <br />z H <br />r z <br />H H <br />H <br />O C Go <br />zHO <br />H O C/D <br />--'- concrete -filled, steel pipe posts (see City standard 1510) <br />shall be constructed and located where necessary to prevent <br />vehicles entering the fueling area from striking the <br />gasoline pumps. <br />4.7.5.3 Tanker Transfer Areas: <br />Either a spill containment systam,or an under- <br />groundatorage <br />tank overfill=prevention system, as detailed in the <br />following sections, shallbe provided for areas where tanker <br />transport to under -ground storage tanks occurs. <br />4.7.5.3.1 Spill containment System: <br />The transfer area shall be graded to prevent the run-on of <br />stormwater from adjacent areas. <br />"Trench" or "valley" drains shall be located at the <br />perimeter of the tanker transfer area along the downhill <br />aide. The drains shall route any runoff or spills through a <br />spill containment structure consisting of a vault or large <br />catch basin with 250 gallons of live capacity. The spill <br />5.fp containment structure shall discharge to the storm drainage <br />0 /tk) rlsystem. <br />�6t ii r i')' ),The outlet of the soi11 containment structure shall be <br />J i� <br />„r $ Y, equipped with an AFL/Clark oil Stop valve, or approved <br />equal, that allows passage of water but not of the product <br />441A being stored in the underground storage tanks. <br />pCF <br />.d e�•� a�2The lid of the spill containment structure shall be designed <br />to vent vapors to the atmosphere and shall be constructed of <br />non -sparking material. The pavement around the lid shall be <br />-� rl sloped or bermed to prevent the run-on of stormwater from <br />adjacent areas. <br />An audible alarm system, triggered by a liquid level sensor, <br />shall be designed and installed to alert an attendant if the <br />tank fills to 95 percent capacity. <br />4.7.5.3.2 <br />Underground Storage Tank <br />Overfill Protection System: <br />.S <br />A spill catchment basin <br />shall be provided which surrounds <br />Hc�.,� �" <br />the underground storage <br />tank's fill pipe, prevents the <br />CIp <br />rf�v <br />51', <br />inflow of the stored <br />substance into the subsurface <br />.�' <br />U -0 5 <br />environment, and drains minor <br />overfills into the underground <br />`) <br />�� <br />U <br />tank once volume becomes <br />available. <br />oeell( <br />5`, <br />An audible alarm system, <br />triggered by a liquid level sensor, <br />- I <br />d;(f <br />L�( <br />shall be designed and installed to alert the tanker operator <br />! tit! <br />when the tank has been filled <br />to 95 percent capacity. <br />