NR 420.02(41) (41) “Waxy, heavy pour crude petroleum” means a crude petroleum with a pour point of 10°C (50°F) or higher as determined by ASTM D97-02, incorporated by reference in s. NR 484.10 (2).

NR 420.02 History History: Renum. from NR 154.01, Register, September, 1986, No. 369, eff. 10-1-86; renum. (2), (3), (4), (7) and (12) to be NR 419.02 (1), 400.02 (11m), (16e), (21m) and (26m), r. (19), am. (21), (29m) and (29p) renum. from NR 420.02 (71) and (72), Register, February, 1990, No. 410, eff. 3-1-90; am. (31), (33) and (41), Register, May, 1992, No. 437, eff. 6-1-92; cr. (8m), (24m), (32m), (38m) and (39m), Register, January, 1993, No. 445, eff. 2-1-93; am. (31), (33), (39m), (41), Register, February, 1995, No. 470, eff. 3-1-95; am. (intro.), renum. (28) to be NR 419.02 (13), Register, December, 1995, No. 480, eff. 1-1-96; am. (41), Register, December, 1996, No. 492, eff. 1-1-97; am. (intro.), (31) and (41), Register, October, 1999, No. 526, eff. 11-1-99; CR 02-146: am (31) and (41) Register October 2003 No. 574, eff. 11-1-03 correction in (33) and (39m) made under s. 13.93 (2m) (b) 7., Stats., Register October 2003, No. 574; CR 11-005: am. (31) Register January 2012 No. 673, eff. 2-1-12; CR 15-077: r. (8m), (26), (32), (38m), am. (39) Register July 2016 No. 727, eff. 8-1-16.

NR 420.03 NR 420.03 Storage of petroleum liquids.

NR 420.03(1) (1) Applicability. The storage, recordkeeping and maintenance requirements of subs. (2), (3) and (4) apply to all storage vessels for petroleum liquids of more than 151,412 liter (40,000 gallon) capacity on which construction or modification is commenced after July 1, 1975, with the exception of:

NR 420.03(1)(a) (a) Storage vessels being used for number 2 through number 6 fuel oils as specified in ASTM D396-02, gas turbine fuel oils numbers 2-GT through 4-GT as specified in ASTM D2880-00, or diesel fuel oils numbers 2-D and 4-D as specified in ASTM D975-02. These ASTM standards are incorporated by reference in s. NR 484.10 (8), (13) and (40).

NR 420.03(1)(b) (b) Storage vessels for the crude petroleum or condensate stored, processed or treated at a drilling and production facility outside a metropolitan county prior to custody transfer.

NR 420.03(1)(c) (c) Pressure vessels which are designed to operate at pressures in excess of 104 kPa (15 psig) without emissions except under emergency conditions.

NR 420.03(1)(d) (d) Subsurface caverns or porous rock reservoirs.

NR 420.03(1)(e) (e) Horizontal underground storage tanks used to store JP-4 jet fuel.

NR 420.03(2) (2) Storage requirements. The owner or operator of any storage vessel to which this section applies shall store petroleum liquids as follows:

NR 420.03(2)(a) (a) If the true vapor pressure of the petroleum liquid, as stored, is equal to or greater than 10.5 kPa (1.52 psia) but not greater than 77 kPa (11.1 psia), the storage vessel shall be equipped with a floating roof, a vapor recovery system or an equally effective alternative control method approved by the department.

NR 420.03(2)(b) (b) If the true vapor pressure of the petroleum liquid, as stored, is greater than 77 kPa (11.1 psia), the storage vessel shall be equipped with a vapor recovery system or an equally effective alternative control method approved by the department.

NR 420.03(3) (3) Recordkeeping.

NR 420.03(3)(a) (a) General records. The owner or operator of any storage vessel to which this section applies shall, for each such storage vessel, maintain a file of each type of petroleum liquid stored, the typical Reid vapor pressure of each type of petroleum liquid stored and the dates of storage. Dates on which the storage vessel is empty shall be indicated.

NR 420.03(3)(b) (b) Vapor pressure dependent records. The owner or operator of any storage vessel to which this section applies shall, for each such storage vessel, determine and record the average monthly storage temperature and true vapor pressure of the petroleum liquid stored at that temperature if one of the following applies:

NR 420.03(3)(b)1. 1. The petroleum liquid has a true vapor pressure, as stored, greater than 3.5 kPa (0.51 psia) but less than 10.5 kPa (1.52 psia) and is stored in a vessel other than one equipped with a floating roof, a vapor recovery system or their equivalents.

NR 420.03(3)(b)2. 2. The petroleum liquid has a true vapor pressure, as stored, greater than 63 kPa (9.1 psia) and is stored in a storage vessel other than one equipped with a vapor recovery system or its equivalent.

NR 420.03(3)(c) (c) Vapor pressure determination. The true vapor pressure shall be determined by application of the procedures in API Publication 2517, 3rd edition, incorporated by reference in s. NR 484.11 (5), in accord with this paragraph. This procedure is dependent upon determination of the average monthly storage temperature and the Reid vapor pressure, which requires sampling of the petroleum liquids in the storage vessels. Unless the department requires in specific cases that the stored petroleum liquid be sampled, the true vapor pressure may be determined by using the average monthly storage temperature and the typical Reid vapor pressure. For those liquids for which certified specifications limiting the Reid vapor pressure exist, that Reid vapor pressure may be used. For other liquids, supporting analytical data shall be made available on request to the department when typical Reid vapor pressure is used.

NR 420.03(4) (4) Equipment maintenance.

NR 420.03(4)(a) (a) Applicability. In addition to the vessels identified in sub. (1) this subsection applies to all storage vessels for petroleum liquids of more than 7,571 liter (2,000 gallon) capacity.

NR 420.03(4)(b) (b) Requirements. No person may place, hold or store in a storage vessel any petroleum liquid which has a true vapor pressure as stored greater than 10.5 kPa (1.52 psia) unless all of the following requirements are met:

NR 420.03(4)(b)1. 1. Any tank surface exposed to the rays of the sun is painted and maintained white so as to prevent excessive temperature and vapor pressure increases.

NR 420.03(4)(b)2. 2. The seals of any floating roof are maintained so as to minimize emissions.

NR 420.03(4)(b)3. 3. All gauging and sampling devices are vapor tight except when gauging or sampling is taking place.

NR 420.03(5) (5) Fixed roof vessels.

NR 420.03(5)(a) (a) Applicability. This subsection applies, subject to the provisions of s. NR 425.03, to all fixed roof storage vessels with capacities greater than 151,412 liters (40,000 gallons) with the exception of those having capacities less than 1,600,000 liters (416,000 gallons) used to store crude petroleum and condensate prior to custody transfer.

NR 420.03(5)(b) (b) Storage requirements. No owner or operator of a fixed roof storage vessel to which this subsection applies may permit the storage vessel to be used for storing any petroleum liquid which has a true vapor pressure as stored greater than 10.5 kPa (1.52 psia), unless all of the following requirements are met:

NR 420.03(5)(b)1. 1. The vessel has been retrofitted with an internal floating roof equipped with a closure seal, or seals, to close the space between the roof edge and tank wall, or with equally effective alternative controls approved by the department.

NR 420.03(5)(b)3. 3. The vessel is maintained such that there are no visible holes, tears, or other openings in the seal or any seal fabric or materials.