Clearwater Oil Company, Ltd.
Big Bear Lease No. 2 Production Facility
SAMPLE Spill Prevention, Control, and
Countermeasure (SPCC) Plan
Table 3-2: Berm capacity calculations
60 ft x 40 ft = 2,400 ft2
4 tanks @ 12 ft dia. each = 4 x (π 122/4) = 452 ft2
2.5 ft x (2,400 - 452) = 4,869 ft3 = 36,423 gallons
Ratio to largest tank
36,423 / 21,000 = 173%
Corresponding Amount of Freeboard
100% of tank volume
21,000 gallons = 2,807 ft3
Net area (minus tank footprint)
2,400 ft2 - 452 ft2 = 1,948 ft2
Minimum berm height for 100% of tank volume
2,807 ft3 / 1,948 ft2 = 1.44 ft
2.5 ft - 1.44 ft = 1.06 ft
The floor and walls of the berm are constructed of compacted earth with a layer of clay that ensures that the berm is able to contain the potential release of oil from the storage tanks until the discharge can be detected and addressed by field operations personnel. Facility personnel inspect the berm daily for the presence of oil. The sides of the berm are capped with gravel to minimize erosion.
The berm is equipped with a manual valve of open-and-closed design. The valve is used to drain the berm and is normally kept closed, except when draining water accumulation within the berm. Drainage from the berm flows into the drainage ditch to the south of the production/ separation area. All water is closely inspected by field operations personnel (who are the persons providing “responsible supervision”) prior to draining water accumulation to ensure that no free oil is present (i.e., there is no sheen or discoloration upon the surface, or a sludge or emulsion deposit beneath the surface of the water). The bypass valve for the containment structure is opened and resealed following drainage under the responsible supervision of field operations personnel. Free oil is promptly removed and disposed of in accordance with waste regulations. Drainage events are recorded on the form provided in Appendix D, including the time, date, and name of the employee who performed the drainage. The records are maintained with this SPCC Plan at the Ridgeview field office for a period of at least three years.
3.2.3Practicability of Secondary Containment [112.7(d)]
Flowlines adjacent to the production equipment and storage tanks are located within the berm, and therefore have secondary containment. Aboveground flowlines that go from the wells to the production equipment and buried flowlines, however, lack adequate secondary containment.
The installation of double-wall piping, berms, or other permanent structures (e.g., remote impoundment) are impracticable at this facility due to the long distances involved and physical
Version 1.0, 11/28/2005