P.1 

OAR Box 1252 

Prepped by Candice Davis 

Document Number: 

44) ll-B-4 

Docket Number: 

A-90-22 

Printed 5/21/2008 11:46:01 AM Sheet 44 of 184 
MEMORANDUM 

P.2 

flfl-i-4 

DATE: August 21, 1991 

TO: HON Project File 6.3 

FROM: Thomas R. Olsen, Radian 

SUBJECT: Loading Techniques Used in the SOCMI 

m EjLUJULi?,, 

The information gathered from a Section 114 survey on 

transfer operations in support of the HON was used to determine 

the distribution of types of loading operations in the industry 

and the extent to which vapor collection systems were used. The 

information was evaluated separately for facilities that had tank 

car and tank truck loading operations only and for facilities 

that had tank truck, tank car and marine vessel loading 

operations. Table 1 presents the results of the analysis. 

The collected information revealed that over 87 percent of 

the vehicles used submerged loading operations. Furthermore, 

over 50 percent of all the transfer racks were equipped with 

vapor collection systems. Based on the data, it was assumed for 

costing purposes that all vehicles were using submerged loading 

techniques. Therefore, there was no need to include the cost of 

retrofitting transport vessels to submerged loading. In 

addition, it was assumed that a vapor collection system was in 

operation at each rack. Therefore, only annual costs needed to 

be calculated for vehicle vapor tightness testing and vapor 

collection. 

The vapor collection system was assumed to include a 

nitrogen blanketing system operated at each rack. The reasons to 

include a nitrogen blanketing system as part of a vapor 

collection system were as follows: 

lt/socmi(htn>05)(Ls) 

saa 
TABLE 1 . LOADING TECHNIQUES 

eo 

Vehicle Type 

Tank car 

Tank truck 

Subtotal (TT 

and RC only) 

Marine 

vessel 

Loading 

Technique 

Bottom 

Splash 

Submerged 

Miscellaneous 

Total 

Bottom 

Splash 

Submerged 

Miscellaneous 

Total 

Bottom 

Splash 

Submerged 

Miscellaneous 

Total 

Bottom 

Splash 

Submerged 

Miscellaneous 

Total 

Number in 

Fleet 

730 

473 

68,533 

164 

69,900 

7,471 

1,951 

14,170 

21 

23,613 

8,201 

2,424 

82,703 

185 

93,513 

1,468 

0 

580 

2 

2,050 

Number with 

Vapor 

Collection 

149 

50 

40,225 

43 

40,467 

151 

12 

8,959 

0 

9,122 

300 

62 

49,184 

43 

49,589 

145 

0 

286 

2 

433 

Distribution 

of Loading 

Type 

1.04 

0.68 

98.04 

0.23 

100 

31.64 

8.26 

60.01 

0.09 

100 

8.77 

2.59 

88.44 

0.20 

100 

71.61 

0.00 

28.29 

0.10 

100 

Percent with 

Vapor 

Collection 

20.41 

10.57 

58.69 

26.22 

57.89 

2.02 

0.62 

63.23 

0.00 

38.63 

3.66 

2.56 

59.47 

23.24 

53.03 

9.88 

0.00 

49.31 

100.00 

21.12 
TABLE 1 . LOADING TECHNIQUES (CONTINUED) 

Vehicle 

Total 

Total 

Total 

Total 

Total 

Type 

Loading 

Technique 

Bottom 

Splash 

Submerged 

Miscellaneous 

Total 

Number in 

Fleet 

9,669 

2,424 

83,283 

187 

95,563 

Number with 

Vapor 

Collection 

445 

62 

49,470 

45 

50,022 

Distribution 

of Loading 

Type 

10.12 

2.54 

87.15 

0.20 

100 

Percent with 

Vapor 

Collection 

4.60 

2.56 

59.40 

24.06 

52.34 

U) 

lt/socrai(htm05)(ls) 

p. 
P.5 

2. 

Nitrogen blanketing can be used for recovering organic 

compound vapors from the vapor space of transport 

vessels. Nitrogen purged into the vehicles ensures 

100 percent collection efficiency. 

Nitrogen blanketing is used to prevent contamination or 

to eliminate moisture found in ambient air. 

Nitrogen blanketing is used as a safety measure to 

avoid explosive mixtures in the transport vessel. If 

air was present, explosive mixtures could present a 

safety hazard. 

Since the nitrogen blanketing system was assumed to be operated 

at each rack, only annual costs for operating the system needed 

to be calculated for the vapor collection system. The annual 

cost for operating a nitrogen blanketing system is equal to the 

annual cost of the nitrogen. 

cc: Julie Anne Probert, Radian 

Kris Scott, Radian 

John Stelling, Radian 

Mae Thomas, Radian 

Project File 6.1 (M. Haley) 

lt/socmi(htin05)(].s) 

aaa