SANTA BARBARA COUNTY AIR POLLUTION CONTROL DISTRICT
 
 

RULE 326. STORAGE OF REACTIVE ORGANIC COMPOUND LIQUIDS.

(Adopted 12/14/1993)

A. Applicability

This rule applies to equipment used to store reactive organic compound (ROC) liquids with a vapor pressure greater than 0.5 psia.

B. Exemptions

C. Definitions

See Rule 102 for definitions not restricted to interpretation of this rule.

"Alternate test method": A new method for testing that is not referenced in this rule or which involves major changes to a referenced test method.

"Appropriate analyzer": A hydrocarbon analyzer that meets the requirements of EPA Reference Method 21 and is calibrated with methane.

"Automatic Bleeder Vent": A floating roof vent that automatically vents air only during initial filling operations and during subsequent landings of the roof.

"Emergency Standby Tank": A tank which is not used (filled or partially filled) more than twice in any 12 (twelve) month period and for which such use is reported to the Control Officer within 24 hours of the start of such use.

"Leak":

A "leak" is not a gaseous emission from pressure relief devices on tanks or delivery vessels when the process pressure exceeds the limit specified for the device.

"Out of Service": means that no liquid is present in the tank, it is configured to allow easy verification of such emptiness by inspection, and no concentrations of gaseous organic compounds greater than 1000 (one thousand) ppmv can be detected outside the tank using USEPA Reference Method 21.

"Pressure vessel": Vessels rated, as indicated by an ASME pressure rating stamp, and operated to contain normal working pressures of at least 15 psig without vapor loss to the atmosphere.

"Preventive Maintenance": means a regularly scheduled course of procedure designed to prevent equipment failure or decline in function.

"Submerged fill pipe": Any fill pipe or discharge nozzle which meets any of the following conditions:

"Tank": A container, constructed primarily of nonearthen materials, used for the purpose of storing or holding any organic liquid.

"Vapor pressure": The vapor pressure measured as described in Section K.1 of this rule.

"Vapor recovery system": Any reactive organic compound vapor control system which is designed to prevent the release or venting of reactive organic compound gases to the atmosphere under normal operating conditions.

D. Requirements - Emission Reduction

E. Requirements for Vapor Loss Control Devices

The following are the vapor loss control devices that satisfy the storage tank requirements of section D.

F. Requirements for All Closure Devices

The closure device on any external floating roof tank or any internal floating roof tank shall meet the following criteria:

G. Requirements for External Floating Roofs

External floating roofs shall meet the following conditions in addition to the closure device requirements in section F.

H. Requirements for Internal Floating Roofs

Internal floating roofs shall meet the following conditions in addition to the closure device requirements in section F. However, where a tank is equipped with both an operational vapor recovery system and an internal floating roof, the operator shall meet the requirements of section E.3 of this rule and shall not be required to comply with sections F, H and I.1.

I. Requirements for Inspection and Reporting

J. Requirements - Recordkeeping

K. Requirements for Test Methods

L. Compliance Schedule

Attachment A

Maximum Allowable Storage Temperatures Versus Vapor Pressure
 
Organic Liquids/Compounds

Maximum Temp. °F 

Not to Exceed

 

0.5 psia

1.5 psia

Middle Distillates 

Kerosene 

Diesel 

Gas Oil 

Stove Oil

195 

230 

249 

275

250 

290 

310 

340

Jet Fuels 

JP-1 

JP-3 

JP-4 

JP-5 

JP-7 

JP-8

165 

-- 

20 

205 

205 

167

230 

25 

68 

260 

260 

222

Fuel Oil 

No. 1 

No. 2 

No. 3 

No. 4 

No. 5 

Residual 

No. 6

195 

230 

249 

275 

380 

405 

450

250 

290 

310 

340 

465 

-- 

--

Asphalts 

60-100 pen. 

120-150 pen. 

200-300 pen.

490 

450 

360

550 

500 

420

Acetone 

Acrylonitrile 

Benzene 

Carbon Disulfide 

Carbon Tetrachloride 

Chloroform 

Cyclohexane 

1,2 Dichloroethane 

Ethyl Acetate 

Ethyl Alcohol 

Isopropyl Alcohol 

Methyl Alcohol 

Methyl Ethyl Ketone 

Toluene 

Vinylacetate

-- 

30 

34 

-- 

20 

-- 

30 

35 

38 

55 

62 

30 

30 

75 

30

35 

62 

70 

10 

63 

40 

65 

75 

70 

85 

95 

62 

70 

120 

65

 
 
 
Attachment B
American Petroleum Institute Nomograph
(API 2518)
True Vapor Pressures (P) of Crude Oils (2 psi to 15 psi RVP)
 

Attachment C
Technical Guidance Document to the Criteria and Guidelines Regulation for AB 2588
(Excerpt from pages 102. 103, and 114)
 
 
5. True Vapor Pressure (TVP)

True vapor pressure, the equilibrium partial pressure exerted by a volatile liquid, is perhaps the most difficult term in the breathing loss equation to calculate. A nomograph (included in Appendix E) relates TVP to both the Reid Vapor Pressure (RVP) and the storage temperature (Ts). RVP is the absolute vapor pressure of volatile crude oil and nonviscuous petroleum liquids. Numerically, the relationship between TVP, RVP, and temperature can be expressed by the following equation:

The value of the constant term CO depends on the given value of RVP.

Values of CO for different RVP numbers are tabulated in Appendix C. It should be noted, however, that an error was discovered in the API nomograph calculated values of TVP so that the RVP was not equal to TVP at 100°F as was expected given the general definition of RVP. Using linear regression techniques, correction factors (CF) were developed and should be added to the calculation values of TVP in order to obtain reasonable TVP numbers. The relationship between the three values is given as follows:

The correction factor was found to be dependent upon RVP according to the following equations:

 



 
TABLE C-3 VALUES OF CO FOR DIFFERENT RVP NUMBERS
RVP  CO __
0<RVP<2 -6622.5
2<RVP<3 -6439.2
RVP = 3  -6255.9
3<RVP<4 - 6212.1
RVP = 4 -6169.2
4<RVP<5 - 6177.9
RVP = 5  -6186.5
5<RVP<6 - 6220.4
RVP = 6 -6254.3
6<RVP<7 -6182.1
RVP = 7 -6109.8
7<RVP<8 - 6238.9
RVP = 8 -6367.9
8<RVP<9 - 6477.5
RVP = 9 -6587.9
9<RVP<10 - 6910.5
RVP = 10  -7234.0
10<RVP<15 - 8178.0
RVP > 15 -9123.2