p.1 

OAR Box 1490 

Prepped by Charmelle Mathews 

Document Number: 

25) IV-B-27 

Docket Number: 

A-94-52 

Printed 8/4/2008 11:51:46 AM Sheet 25 of 273 
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MEMORANDUM 

TO: Docket 94-52, Reinforced Plastic Composites NESHAP 

FROM: Keith Barnett, Environmental Protection Agency 

DATE: January 17,2003 

SUBJECT: Derivation of Table 5 emission limits. 

In the final rule, we provided a table of emission limits in lb of organic HAP emissions/per ton of 

resin and gel coat. This memo discusses how those limits were derived. 

There were two approaches used. For a specific process/product grouping where a facility 

achieving 95 percent capture and control exists, we used the after control emission factor for that 

facility. If there was more than one facility, we picked the facility with the highest emission 

factor. If there was not a facility for a specific process product grouping, the emission factor is 5 

percent ofthe existing source MACT floor. 

The attached table below shows the existing source MACT floors and the values from Table 5 of 

the final rule. Also shown is the source ofthe Table 5 value. 

For SMC manufacturing, the only facility with Capture and control os Core Materials, which has 

90 percent control. To calculate an emission factor for 95 percent control, we divided the after 

control emission factor (2.4) by 0.1 and then multiplied the result by 0.05. 

/T~^-5^ 

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N 

Source ofthe Table 5 limit. 

. . „ Organic HAP emissions (Limits are calculated, and then 

Operation type *..-_,*.__• __, limit in Table 5 of the rounded up to the nearest whole 

r v Specific Operation floor _ , . „ r 

final rule. number) 

1. open molding - a. mechanical resin 112 lb/ton 6 lb/ton 5 percent ofthe existing source floor 

corrosion-resistant and/or application 

high strength (CR/HS) ...b/.^fE-r.^L^PP.l!?^??.1?. .1.7.!..!)?^°!} .?Jb/t?ii 5 percent ofthe existing source floor 

c. manual resin 123 lb/ton 7 lb/ton 5 percent ofthe existing source floor 

application 

2. open molding - non- a. mechanical resin 87 lb/ton 13 lb/ton Emission factor for American Standard 

CR/HS ...^PP^ation at 95 percent control 

....•?.-..fKl?TM*r.5t.SPP.l!^J.?.-?. 1?.?..!)?#°!?!.9..!!?^.9 n

 5

. percent ofthe existing source floor 

c. manual resin 87 lb/ton 5 lb/ton 5 percent ofthe existing source floor 

application 

3. open molding - tooling a. mechanical resin 254 lb/ton 13 lb/ton 5 percent ofthe existing source floor 

application 

b. manual resin 157 lb/ton 8 lb/ton 5 percent of the existing source floor 

application 

4. open molding - low a. mechanical resin 497 lb/ton 25 lb/ton 5 percent ofthe existing source floor 

flame spread/low smoke application 

products b. filament application 270 lb/ton 14 lb/ton 5 percent ofthe existing source floor 

c. manual resin 238 lb/ton 12 lb/ton 5 percent of the existing source floor 

application 

5. open molding - shrinkage a. mechanical resin 354 lb/ton 18 lb/ton 5 percent of the existing source floor 

controlled resins ...3PP.l!£^.9!?...'. 

b. filament application 215 lb/ton 11 lb/ton ^.P.^?.*-"*.?.?.!^?.?^ 

c. manual resin 180 lb/ton 9 lb/ton 5 percent of the existing source floor 

application 

6. open molding - gel coatb a. tooling gel 437 lb/ton 22 lb/ton 5 percent ofthe existing source floor 

coating 

b. white/off white 267 lb/ton 22 lb/ton Emission factor for A.R.E. in Massillon 

pigmented gel which has 95 percent capture and control 

coating 
Oo 

Source of the Table 5 limit. 

_, . .. »,»«-,r- Organic HAP emissions (Limits are calculated, and then 

^ _.- _. Existing source MACT ,. T\ ._,., _ r . . , . x iU ' . , Operatio r J n typ r e „ ._ „ „ limit in Table 5 of the rounded up to the nearest whole Specific Operation floor _ , , . .

 r 

final rule. number) 

call other 377 lb/ton 19 lb/ton 5 percent ofthe existing source floor 

pigmented gel 

coating 

d. CR/HS or high 605 lb/ton 31 lb/ton 5 percent ofthe existing source floor 

performance gel coat 

e. fire retardant gel 854 lb/ton 43 lb/ton 5 percent ofthe existing source floor 

coat 

f. clear production 522 lb/ton 27 lb/ton 5 percent ofthe existing source floor 

gel coat 

7. centrifugal casting - N/A 26 lb/ton 2 lb/ton 5 percent ofthe existing source floor 

CR/HS ^ 

8. centrifugal casting - non- N/A 20 lb/ton 1 lb/ton 5 percent ofthe existing source floor 

QR/HS^ 

9. SMC Manufacturing N/A Work Practice 21b/ton Emission factor for Core Materials 

adjusted form 90 percent control to 95 

percent control