p.1 

OAR Box 1168 

Prepped by Ollie Stewart 

Document Number: 

90) ll-C-19 

Docket Number: 

A-89-10 

Printed 4/29/2008 11:23:19 AM Sheet 90 of 131 
JsW Sr

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Km. 

A-89-10 

P.2 

II-C-1 9 

UNITED STATES ENVIRONMENTAL PROTEC1 

Office of Air Quality Planning and Stai 

Research Triangle Park, North Carolina 27711 

MAR I 6 I990 ;

:

.jj FEB l»»99l SL:); 

EPAAIRDOCKET^ 

Dear Reg Neg Committee Member: 

Please find enclosed 2 items: estimated emission factors and estimated 

model plant emissions for each component at different leak definitions and 

percent leakers, and model plant emissions for all components that show the 

impact of various mixes of percent leakers and leak definitions for the entire 

plant. We have selected a wide range of possible leak definitions and percent 

leakers. This table, which Les Montgomery suggested, should be helpful in 

comparing the significance of emission differences between various definitions 

and should also help identify where we can achieve the maximum emission 

reductions. 

The emission factors in these tables were generated from the ethylene 

oxide and butadiene databases that we have been using and have distributed. 

These factors were calculated using the percent leaker/emission rate 

correlation approach that Robert Pahel-Short presented for valves at the last 

meeting. The correlations for the the flange data which Robert prepared 

following the last meeting were good--similar to the valve correlations. The 

pump correlations were poorer, but appear adquate for comparison purposes. 

In developing these emission factors, we assumed that the nominal 

performance of a facility, which meets a specified percent leak target, would 

average 25 percent lower than the not-to-be exceeded target; e.g., the 

emission factor for a 1-percent leak limit was calculated as 75 percent of the 

rate that would occur if the 1-percent limit were exactly achieved. 

Robert L. Ajax 

Chief 

Standards Development Branch 

2 Enclosures 

cc: Interested parties 
P.3 1 _w-~ ~ 

================ 

Nurr 

Equipment ( 

Component 

Pl 

Gas Valves 

Light Liquid 

Valves 

Pumps 

Flanges 

Compressors 

Open-ended 1i 

Pressure-reli 

devices 

Sampling 

connection sys 

Total 

Equipment 

Component 

Gas Valves 

Light Liquid 

Valves 

Pumps 

flanges 

Compressors 

Open-ended 1ines 

Pressure-relief 

devices (gas) 

Sampling 

connection sys 

1 pumps: 

gas val 

1iquid 

flanges 

2 pumps: 

gas val 

1iquid 

flanges 

3 pumps: 

gas val 

1iquid 

flanges 

======== 

ber of 

ponents 

SOCMI 

Model 

ant 8) 

402 

524 

29 

2400 

2 

226 

42 

104 

========= 

Avg 

Uncont 

SOCMI 

2.251 

3.720 

1.433 

1.992 

0.456 

0.384 

4.368 

1.560 

16.164 

Avg 

Uncont 

SOCMI 

0.00560 

0.00710 

0.04940 

0.00083 

0.228 

0.0017 

0.104 

0.015 

=== ======= 

Avg SOCMI 

(Monthly 

LDAR) 

0.608 

1.525 

0.562 

1.992 

0 

0 

0 

0 

4.687 

W g SOCMI 

(Monthly 

LDAR) 

0 

0 

0 

0 

00151 

00291 

01936 

00083 

0 

0 

0 

0 

500 ppm. 10% 

ves: 1000 ppm, 2% 

valves: 1000 ppm, 2% 

: 500 ppm. 2% 

5000 ppm, 5% 

ves: 500 ppm, 2% 

valves: 500 ppm, 

: 250, 2% 

1000 ppm, 5% 

ves: 500 ppm, 2% 

valves: 500 ppm, 

1000 ppm, 1% 

2% 

2% 

========= 

Sterl ing 

Benzene 

Data 

0.123 

. 0.160 

0.025 

0.048 

0 

0 

0 

0 

0.356 

EMISSIONS FOR EXAMPLE ALTERNATIVES 

COMPARISON OF EMISSIONS 

===================== 

Emissions (kg/hr) 

1 2 

0.142 0.114 

0.519 0.448 

0.479 0.405 

0.917 0.773 

0 0 

0 0 

0 0 

0 0 

2.056 1.740 

COMPARISON OF EMISSION FACTORS 

Emission 

Sterling 

Benzene 

Data 

0.00031 

0.00031 

0.00086 

0.00002 

0 

0 

0 

0 

4 

5 

6 

'actor (kg/hr/source) 

1 2 

0.000354 0.000284 0. 

0.000990 0.000855 0. 

0.016500 0.013950 0. 

0.000382 0.000322 0. 

0 0 

0 0 

0 0 

0 0 

pumps: 500 ppm, 5% 

gas valves: 250 ppm 

liquid valves: 250 

flanges: 500 ppm 1% 

======== 

3 

0.114 

0.448 

0.291 

0.629 

0 

0 

0 

0 

1.482 

* 3 

000284 0 

000855 0 

010050 0 

000262 0 

0 

0 

0 

0 

2% 

ppm, 2% 

pumps: 500 ppm, 5% 

gas valves: 1000 ppm, 1% 

liquid valves: 1000 ppm, 1% 

flanges: 250 ppm, 1% 

pumps*. 5000 ppm, 1% 

gas valves: 500 ppm 

1iquid valves: 500 

flanges: 1000 ppm, 

. 1% 

ppm, 1% 

. 5% 

========= 

4 

0.101 

0.397 

0.239 

0.552 

0 

0 

0 

0 

1.289 

4 

000250 0 

000758 0 

008250 0 

000230 0 

0 

0 

0 

0 

======= 

5 

0.082 

0.341 

0.239 

0.478 

0 

0 

0 

0 

1.140 

5 

000205 

000650 

008250 

000199 

0 

0 

0 

0 

7 

8 

========== 

6 

0.058 

0.313 

0.081 

0.425 

0 

0 

0 

0 

0.876 

6 

0.000144 

0.000597 

0.002790 

0.000177 

0 

0 

0 

0 

•y - . 

03/16/90 

================== 

7 8 

0.058 0.055 

0.313 0.286 

0.058 0.048 

0.371 0.330 

0 0 

0 0 

0 0 

0 0 

0.800 0.719 

7 8 

0.000144 0.000136 

0.000597 0.000546 

0.002010 0.001650 

0.000154 0.000138 

0 0 

0 0 

0- 0 

0 0 

pumps: 1000 ppm, 1% 

gas valves: 500 ppm, it 

liquid valves: 500 ppm, 1% 

flanges: 500, .5*% 

pumps: 500 ppm, 1*% 

gas valves: 250 ppm, 1% 

liquid valves*. 250 ppm, \X 

flanges: 250 ppm, .5% 

Tl 

j 

, 

* 

i 
P.4 

EMISSION FACTOR MATRICES 

SINGLE MECHANICAL SEAL PUMPS (KG/HR/SOURCE) 

15% 10% 5% 1% 

5000 ppm 0.04185 0.0279 

1000 ppm 0.03015 0.0201 

500 ppm 0.02475 0.0165 

0.01395 0.00279 

0.01005 0.00201 

0.00825 0.00165 

PLANT EMISSIONS (KG/HR) 

5000 ppm 

1000 ppm 

500 ppm 

1.21365 

0.87435 

0.71775 

0.8091 

0.5829 

0.4785 

0.40455 

0.29145 

0.23925 

0.08091 

0.05829 

0.04785 

03/16/90 

DUAL MECHANICAL SEAL PUMPS (KG/HR/SOURCE) 

4% 3% 2% 1% 

500 ppm 0.0123 0.009225 0.00615 0.003075 

250 ppm 0.01065 0.008025 0.005325 0.002662 

100 ppm 0.00621 0.004658 0.003105 0.001552 

PLANT EMISSIONS (kg/hr) 

500 ppm 0.3567 0.267525 0.17835 0.089175 

250 ppm 0.30885 0.232725 0.154425 0.077213 

100 ppm 0.18009 0.135068 0.090045 0.045022 

Assumes 29 pumps/plant 

Calculated emissions assume plant's emissions are 25% lower than emissions at stated percentage and leak definition. 

GAS VALVES (KG/HR/SOURCE) 

4% 3% 2% 1% 

1000 ppm 

500 ppm 

250 ppm 

1000 ppm 

500 ppm 

250 ppm 

0.000652 0.000503 0.000354 0.000205 

0.000561 0.000422 0.000284 0.000144 

0.000478 0.000364 0.00025 0.000136 

PLANT EMISSIONS (KG/HR) 

0.262104 0.202206 0.142308 0.08241 

0.225522 0.169644 0.114168 0.057888 

0.192156 0.146328 0.1005 0.054672 

LIQUID VALVES (KG/HR/SOURCE) 

4% 3% 2% 1% 

1000 ppm 0.00167 0.00134 0.00099 0.00065 

500 ppm 0.00138 0.00112 0.000855 0.000597 

250 ppm 0.00117 0.00096 0.000758 0.000546 

PLANT EMISSIONS (KG/HR) 

1000 ppm . 0.87508 0.70216 0.51876 0.3406 

500 ppm 0.72312 0.58688 0.44802 0.312828 

250 ppm 0.61308 0.50304 0.397192 0.286104 

Assumes 402 gas valves/plant Assumes 524 liquid valves/plant 

Calculated emissions assume plant's emissions are 25% lower than emissions at stated percentage and leak definition. 

FLANGES (KG/HR/SOURCE) 

4% 3% 2% 1% 0.5% 

1000 ppm 

500 ppm 

250 ppm 

0.000772 0.000602 0.000432 0.000262 0.000177 

0.000685 0.000533 0.000382 0.000230 0.000154 

0.000568 0.000445 0.000322 0.000199 0.000138 

PLANT EMISSIONS (KG/HR) 

1000 ppm 

500 ppm 

250 ppm 

1.8528 

1.644 

1.3632 

1.4448 

1.2792 

1.068 

1.0368 

0.9168 

0.7728 

0.6288 

0.552 

0.4776 

0.4248 

0.3708 

0.33 

Assumes 2400 flanges/plant 

Calculated emissions assume plant's emissions are 25% lower than emissions at stated percentage and leak definition.