SUBPART K  -  Standards of Performance for Storage Vessels for
                        Petroleum Liquids for Which Construction, 
                        Reconstruction, or Modification Commenced After 
                        June 11, 1973, and Prior to May 19, 1978   
                        (Delegation Effective 11-8-76:  Rev. Effective


                (a)   Except as provided in Rule 260.110(b), the affected 
           facility to which this subpart applies is each storage vessel for 
           petroleum liquids which commenced construction, reconstruction, or 
           modification after June 11, 1973 and which has a storage capacity 
           greater than 151,412 liters (40,000 gallons).

                (b)   This subpart does not apply to storage vessels for 
           petroleum or condensate stored, processed, and/or treated at a 
           drilling and production facility prior to custody transfer.

                RULE 260.111.    DEFINITIONS  (Rev. Effective 3/14/89)

                As used in this subpart, all terms not defined herein shall 
           have the meaning given them in Subpart A of this Regulation.

                (a)   "Storage Vessel" means any tank, reservoir, or container
           used for the storage of petroleum liquids, but does not include:

                      (1)  Pressure vessels which are designed to operate in
                excess of 15 pounds per square inch gauge without emissions to 
                the atmosphere except under emergency conditions.

                      (2)  Subsurface caverns or porous rock reservoirs, or

                      (3)  Underground tanks if the total volume of petroleum
                liquids added to and taken from a tank annually does not 
                exceed twice the volume of the tank.

                (b)   "Petroleum Liquids" means petroleum, condensate, and any
           finished or intermediate products manufactured in a petroleum 
           refinery but does not mean Number 2 through Number 6 fuel oils as 
           specified in ASTM-D-396-78, gas turbine fuel oils Numbers 2-GT 
           through 4-GT as specified in ASTM-D-2880-78, or diesel fuel oils 
           Numbers 2-D and 4-D as specified in ASTM-D-975-78. (Effective 

                (c)   "Petroleum Refinery" means each facility engaged in
           producing gasoline, kerosene, distillate fuel oils, residual fuel 
           oils, lubricants, or other products through distillation of 
           petroleum or through redistillation, cracking, extracting or 
           reforming of unfinished petroleum derivatives.  (Effective 5/1/81)

                (d)   "Petroleum" means the crude oil removed from the earth 
           and the oils derived from tar sands, shale, and coal.

                (e)   "Hydrocarbon" means any organic compound consisting
           predominantly of carbon and hydrogen.

                (f)   "Condensate" means hydrocarbon liquid separated from 
           natural gas which condenses due to changes in the temperature 
           and/or pressure and remains liquid at standard conditions.

                (g)   "Custody Transfer" means the transfer of produced 
           petroleum and/or condensate, after processing and/or treating in 
           the producing operations, from storage tanks or automatic 
           transfer facilities to pipelines or any other forms of 

                (h)   "Drilling and Production Facility" means all drilling 
           and servicing equipment, wells, flow lines, separators, equipment,
           gathering lines, and auxiliary nontransportation-related equipment 
           used in the production of petroleum but does not include natural 
           gasoline plants.

                (i)   "True Vapor Pressure" means the equilibrium partial 
           pressure exerted by a petroleum liquid as determined in accordance 
           with methods described in American Petroleum Institute Bulletin 
           2517, Evaporation Loss from Floating Roof Tanks, 1962.

                (j)   "Floating Roof" means a storage vessel cover consisting 
           of a double deck, pontoon single deck, internal floating cover or 
           covered floating roof, which rests upon and is supported by the 
           petroleum liquid being contained, and is equipped with a closure 
           seal or seals to close the space between the roof edge and tank 

                (k)   "Vapor Recovery System" means a vapor gathering system
           capable of collecting all hydrocarbon vapors and gases discharged 
           from the storage vessel and a vapor disposal system capable of 
           processing such hydrocarbon vapors and gases so as to prevent their 
           emission to the atmosphere.

                (l)   "Reid Vapor Pressure" is the absolute vapor pressure of
           volatile crude oil and volatile non-viscous petroleum liquids, 
           except liquified petroleum gases, as determined by ASTM-D-323-82.  
           (Rev. Effective 3/14/89)

                                 (VOC)   (Rev. Effective 5-1-81)

                (a)   The owner or operator of any storage vessel to which 
           this subpart applies shall store petroleum liquids as follows:

                      (1)  If the true vapor pressure of the petroleum liquid, 
                as stored, is equal to or greater than 78 mm Hg (1.5 psia) but 
                not greater than 570 mm Hg (11.1 psia), the storage vessel 
                shall be equipped with a floating roof, a vapor recovery 
                system, or their equivalents.

                      (2)  If the true vapor pressure of the petroleum liquid 
                as stored is greater than 570 mm Hg (11.1 psia), the storage 
                vessel shall be equipped with a vapor recovery system or its 

                RULE 260.113.    MONITORING OF OPERATIONS

                Monitoring requirements shall be those specified in Part 60,
           Chapter I, Title 40, Code of Federal Regulations, Section 60.113.