Spill containment system

Abstract

A spill containment system is attachable to a riser pipe with an axially moveable seal. The spill containment system allows access to a drop tube in the riser pipe via a removable liquid communication assembly. The spill containment system includes a sealed interstitial space, which remains sealed during installation, service and use of the system. The spill containment system is protected by a weather resistant cover assembly.

What is claimed is: 
     
       1. A fluid spill collector assembly comprising:
 a primary receptacle including:
 an upper primary receptacle end having an upper primary receptacle opening; 
 a lower primary receptacle end having a lower primary receptacle opening; 
 a primary receptacle wall extending between said upper and lower primary receptacle ends, said primary receptacle wall defining a primary receptacle cavity; 
 
 a secondary receptacle including:
 an upper secondary receptacle end having an upper secondary receptacle opening; 
 a lower secondary receptacle end having a lower secondary receptacle opening; and 
 a secondary receptacle wall extending between said upper and lower secondary receptacle ends, said secondary receptacle wall defining a secondary receptacle cavity, 
 said primary receptacle received within said secondary receptacle cavity, said upper primary receptacle opening sealingly coupled to said upper secondary receptacle opening to form a sealed upper end of the assembly; and 
 
 a single, unitary tank adapter having a base platform with an aperture extending therethrough, said base platform sealingly coupled to said primary lower receptacle opening and said lower secondary receptacle opening to form a sealed lower end of the assembly, 
 said sealed upper end and lower ends of the assembly cooperating to form a sealed interstitial space between said primary receptacle wall and said secondary receptacle wall, 
 wherein said primary receptacle cavity remains in fluid communication with said upper primary receptacle opening and said aperture of said tank adapter while said interstitial space is sealed. 
 
     
     
       2. The fluid spill collector assembly of  claim 1 , wherein said base platform of said tank adapter comprises:
 a primary sealing surface disposed on an upper surface of said base platform, said primary sealing surface sealingly engaging said lower primary receptacle opening; and 
 a secondary sealing surface disposed on a lower surface of said base platform, said secondary sealing surface sealingly engaging said lower secondary receptacle opening, whereby said primary sealing surface is spaced from said secondary sealing surface. 
 
     
     
       3. The fluid spill collector assembly of  claim 1 , further comprising a liquid communication assembly disposed within said primary receptacle cavity, said liquid communication assembly comprising:
 an upper portion connectable to a liquid delivery device; and 
 a lower portion coupled to said aperture of said tank adapter. 
 
     
     
       4. The fluid spill collector assembly of  claim 3 , wherein:
 said upper portion of said liquid communication assembly comprises an adapter fixed to said lower portion; and 
 said lower portion of said liquid communication assembly comprises a drop tube riser clamp threadably engaged to said aperture of said tank adapter, said drop tube riser clamp having at least one lug adapted to engage a removal tool, 
 said liquid communication assembly removable from said tank adapter by using said lug to threadably disengage said drop tube riser clamp from said tank adapter. 
 
     
     
       5. The fluid spill collector assembly of  claim 1 , wherein said base platform of said tank adapter includes a drain valve aperture sized to receive a drain valve assembly, said drain valve aperture in fluid communication with said aperture of said tank adapter. 
     
     
       6. The fluid spill collector assembly of  claim 1 , further comprising an inspection port aperture sized to receive an inspection port assembly, said inspection port aperture in fluid communication with said interstitial space. 
     
     
       7. The fluid spill collector assembly of  claim 1 , further comprising a cover assembly comprising:
 a collar including:
 an upper collar portion; 
 a lower collar portion; and 
 an inner collar peripheral surface extending from said upper collar portion to said lower collar portion, said inner peripheral surface having at least one radial collar aperture formed therein; 
 
 a cover ring at least partially received within said collar, said cover ring including:
 an upper ring portion; 
 a lower ring portion; 
 an inner ring peripheral surface extending from said upper ring portion to said lower ring portion; and 
 an outer ring peripheral surface opposite said inner ring peripheral surface, said cover ring having at least one radial ring aperture extending from said inner ring peripheral surface to said outer ring peripheral surface; 
 
 a fastener extending radially through said ring aperture and into said radial collar aperture to fix said cover ring to said collar; and 
 a cover receivable within said cover ring, said cover blocking access to said primary receptacle cavity and said fastener when said cover is received within said cover ring. 
 
     
     
       8. The fluid spill collector assembly of  claim 7 , wherein said cover ring and said cover are removable from said collar while said interstitial space remains sealed. 
     
     
       9. The fluid spill collector assembly of  claim 7 , further comprising:
 a drain valve received within said primary receptacle cavity, said drain valve moveable between an open position in which said primary receptacle cavity is in fluid communication with said aperture of said tank adapter, and a closed position in which said primary receptacle cavity is fluidly isolated from said aperture of said tank adapter; and 
 a drain valve actuator removably attachable to said cover ring, said drain valve actuator operably coupled to said drain valve so that said drain valve is in the open position when said drain valve actuator is attached to said cover ring, 
 said drain valve actuator preventing said cover from being received by said cover ring when said drain valve actuator is attached to said cover ring. 
 
     
     
       10. The fluid spill collector assembly of  claim 1 , further comprising a stationary collar having an upper collar portion, a lower collar portion, and an inner collar peripheral surface extending from said upper collar portion to said lower collar portion, wherein:
 said sealed upper end of the assembly sealingly engages said inner collar peripheral surface while also allowing axial movement of said primary and secondary receptacles with respect to said stationary collar. 
 
     
     
       11. The fluid spill collector assembly of  claim 10 , wherein:
 said primary receptacle includes a primary flange at said upper primary receptacle end, 
 said secondary receptacle includes a secondary flange at said upper secondary receptacle end, and 
 said fluid collector assembly further comprises a gasket coupled to at least one of said primary and secondary flanges, said gasket effecting the sealing engagement between said sealed upper end of the assembly and said inner collar peripheral surface. 
 
     
     
       12. The fluid spill collector assembly of  claim 1 , wherein said primary receptacle includes a primary flange at said upper primary receptacle end and said secondary receptacle includes a secondary flange at said upper secondary receptacle end, said fluid spill collector assembly further comprising:
 a first pressure distribution ring coupled to said primary flange; and 
 a second pressure distribution ring coupled to said secondary flange, 
 said primary and secondary flanges sandwiched between said first and second pressure distribution rings when said upper primary receptacle opening is sealingly coupled to said upper secondary receptacle opening to form said sealed upper end of the assembly. 
 
     
     
       13. The fluid spill collector assembly of  claim 12 , further comprising:
 a stationary collar having an upper collar portion, a lower collar portion, and an inner collar peripheral surface extending from said upper collar portion to said lower collar portion; and 
 a gasket received within said second pressure distribution ring, said gasket effecting a sealing engagement between said sealed upper end of the assembly and said inner collar peripheral surface while allowing axial movement of said primary and secondary receptacles with respect to said stationary collar. 
 
     
     
       14. A fluid spill collector assembly comprising:
 a stationary collar having an inner peripheral surface with at least one radial collar aperture formed therein; and 
 a double-walled spill container assembly comprising:
 an outer receptacle having a first open upper end, said outer receptacle sized to be receivable within said collar; 
 an inner receptacle having a second open upper end, said inner receptacle coupled to said outer receptacle to create a sealed interstitial space therebetween; and 
 a seal coupled to at least one of said outer receptacle and said inner receptacle, said seal slidably engageable with said inner peripheral surface of said collar to create a fluid tight seal between said collar and said double-walled spill collector container assembly, 
 
 said double-walled spill container assembly axially moveable with respect to said stationary collar while said interstitial space remains sealed. 
 
     
     
       15. The fluid spill collector assembly of  claim 14 , wherein said sealed interstitial space is sealed before said seal of said double-walled spill collector container assembly is engaged with said inner peripheral surface of said collar. 
     
     
       16. The fluid spill collector assembly of  claim 14 , further comprising a gravel guard having an open upper end, said stationary collar coupled with said open upper end of said gravel guard, said double-walled spill container received within said gravel guard when said seal is slidably engaged with said inner peripheral surface of said collar. 
     
     
       17. The fluid spill collector assembly of  claim 14 , wherein said outer receptacle includes an outer receptacle flange at said first open upper end, said inner receptacle includes an inner receptacle flange at said second open upper end, said inner and outer receptacle flanges coupled when said inner receptacle is coupled to said outer receptacle, said fluid spill collector assembly further comprising:
 a first pressure distribution ring coupled to said inner receptacle flange; and 
 a second pressure distribution ring coupled to said outer receptacle flange, said seal received within said second pressure distribution ring. 
 
     
     
       18. The fluid spill collector assembly of  claim 14 , wherein at least one radial collar aperture is formed in said stationary collar, further comprising a cover assembly comprising:
 a cover ring at least partially received within said stationary collar, said cover ring including:
 an upper ring portion; 
 a lower ring portion; 
 an inner ring peripheral surface extending from said upper ring portion to said lower ring portion; and 
 an outer ring peripheral surface opposite said inner ring peripheral surface, said cover ring having at least one radial ring aperture extending from said inner ring peripheral surface to said outer ring peripheral surface; 
 
 a fastener extending radially through said radial ring aperture and into said radial collar aperture to fix said cover ring to said collar; and 
 a cover receivable within said cover ring, said cover blocking access to said spill collector assembly and said fastener when said cover is received within said cover ring. 
 
     
     
       19. The fluid spill collector assembly of  claim 18 , further comprising:
 a drain valve received within said inner receptacle, said drain valve moveable between an open position and a closed position; and 
 a drain valve actuator removably attachable to said cover ring, said drain valve actuator operably coupled to said drain valve so that said drain valve is in the open position when said drain valve actuator is attached to said cover ring, 
 said drain valve actuator preventing said cover from being received by said cover ring when said drain valve actuator is attached to said cover ring.