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// CODE SNIPPET

3101F.6 Oil Spill Exposure Classification

California Building Code 2016 (Vol 1 & 2) > 31F [SLC] Marine Oil Terminals > 3101F [SLC] Introduction > 3101F.6 Oil Spill Exposure Classification
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Each MOT shall be categorized into one of three oil spill exposure classifications (high, medium or low) as shown in Table 31F-1-1, based on all of the following:
  1. Exposed total volume of oil (VT) during transfer.
  2. Maximum number of oil transfer operations per berthing system (defined in Section 3102F.1.3) per year.
  3. Maximum vessel size (DWT capacity) that may call at the MOT.
During a pipeline leak, a quantity of oil is assumed to spill at the maximum cargo flow rate until the ESD is fully effective. The total volume (VT) of potential exposed oil is equal to the sum of the stored and flowing volumes (Vs + VF) at the MOT, prior to the emergency shutdown (ESD) system(s) stopping the flow of oil. All potential spill scenarios shall be evaluated and the governing scenario clearly identified. The stored volume (Vs) is the non-flowing oil. The flowing volume (VF) shall be calculated as follows:
(1-1)
where
VF=Flowing Volume [bbl]
QC=Maximum Cargo Transfer Rate [bbl/hr]
Δt =For MOTs that first transferred oil on or before January 1, 2017, Δt may be taken as (ESD time, 30 or 60 seconds). For MOTs that first transfer oil after January 1, 2017, Δt shall be taken as ((ESD closure time) + (time required to activate ESD)) [seconds].
If spill reduction strategies, (e.g. pipeline segmentation devices, system flexibility and spill containment devices) are adopted, such that the maximum volume of exposed oil during transfer is less than 1,200 barrels, the spill classification of the facility may be lowered.
This classification does not apply to marine terminals that transfer LNG.


TABLE 31F-1-1
MOT OIL SPILL EXPOSURE CLASSIFICATION
SPILL CLASSIFICATIONEXPOSED TOTAL VOLUME OF OIL (VT) (bbls)MAXIMUM NUMBER OF TRANSFERS PER BERTHING SYSTEM PER YEARMAXIMUM VESSEL SIZE (DWT×1,000)
High≥ 1200N.A.N.A.
Moderate< 1200≥ 90≥ 30
Low< 1200< 90< 30

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3101F.6 [SLC] Marine Oil Terminals, Oil Spill Exposure Classification
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California Building Code 2016 (Vol 1 & 2) > 31F [SLC] Marine Oil Terminals > 3101F [SLC] Introduction > 3101F.6 Oil Spill Exposure Classification
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