### 7705 Technology Drive Melbourne Florida 32904

Phone 321 - 951 - 9464 Fax 321 - 728 - 9071 April 13th, 2015 Supplement to submittal under Docket ID No. EPA - HQ- OAR - 2014 - 0198 Air and Radiation Docket U.S. Environmental Protection Agency 1200 Pennsylvania Ave. NW Mail Code 6102T Washington DC 20460 RE: Protection of Stratospheric Ozone: Change of Listing Status for Certain Substitutes under the Significant New Alternatives Policy Program (79 Fed. Reg. 46,126 April 3, 2014 Dear Sir/Madam: Structural Composites, Inc and its sister company C ompsys , Inc (SC) , of Melbourne Florida has commented (20 Oct 14) on the Environmental Protection Agency’s (EPA) proposed rule titled “ Protection of Stratospheric Ozone: Change of Listing Status for Certain Substitutes Under the Significant New Alternatives Program” published in the Federal Register on August 6 , 2014. We want to add new consideration to the growing body of evidence that the 134A foam blowing agent is largely retained in the foam. Our Preform process results in a structure that is completely encapsulated in composite, and as the 134A molec ule is very large it cannot escape through the composite matrix. In discussion with our supplier BASF we estimate an order of magnitude decrease in the CO2 equivalent from the current method which assumes 100% of the 134a is released. We believe that for use in Preforms for Composites (boats, transportation, infrastructure and the like) we estimate the CO2 equivalent of 12 0 vs the current 1400. In our past letters our GHG Return on Investment calculations were based on the CO2 factor of 1400, While this was favorable and had a 2 year break even, The GHG ROI will dramatically increase if we can properly account for the 134a retained in the foam. As we have no alternative for our preforming technology and as we can clearly demonstrate that our technology h as a GHG Return on Investment in life cycle GHG, we hereby request a full exemption for use of 134a as a blowing agent in foam used in our composite p reforms. Thank you, Scott M. Lewit President 321 - 252 -4566 slewit@aol.com

### 7705 Technology Drive Melbourne Florida 32904

Phone 321 - 951 - 9464 Fax 321 - 728 - 9071 Appendix A - Green House Gas Return - On - Investment Calculations The following is used from http://www.epa.gov/climateleadership/documents/emission - factors.pdf

Gas and D iesel CO2 Equivalents

Thus from the above EPA data it is determined that Diesel has 22.49 lb/gal of GHG Gasoline has 22.39 lb/gal of GHG Refrigerated Trailer Example - Prisma Advanced Trailer - 53ft. Semi - Trailer - Refer - 15% weight reduction, 25% better Thermal, double the current life cycle .

The trailer uses approx. 80lbs of 134a in the polyurethane foam thus it produces 114,400 lbs of GHG, it is non - recurring during the foaming process, it is trapped in the foam and encased in the composite.

Product Foam Usage - Impac t - Fuel Offset Needed - it will take 5,086 gal of fuel savings to offset the GHG due to the non - recurring GHG in the 134a foam. Fuel Usage - Semi Refer Trailer usage is 22,630 gal/year 

### CO2 1 em is si on- fa ct ors.pdf 134A 1430 em is si on- fa ct ors.pdf 245f a 1030 em is si on- fa ct ors.pdf N2 O 298 em is si on- fa ct ors.pdf CH 4 25 em is si on- fa ct ors.pdf

em issi on-fa ctors.pdf 4 A PL 14 CO2 CH 4 N2 O Gas 8. 78 kg/gal 19. 316 lb /gal 0. 000837 0. 000176 di esel 10. 19 kg/gal 22. 418 lb /gal 0. 000925 0. 000176



### Re fer Trai ler A nal ysi s Th er mal 25% Improve me nt We ig ht 15% Re ducti on Li fe 2 Ti me s 15 y rs GHG i n Trai ler Foa m 1000 foa m fa ctor CO2 134a 80 lb s 1430 114400 lb s One Ti me N on-R ec ur ri ng

134A -G HG 114400 lb s Fue l Need ed 5086 Ga llo ns Annual Us age - Re ferTru ck s

uni ts gal f uel gal /Tr uc k pery ea r Truck 59, 659. 00 1, 350, 114, 617. 00 22, 630. 53 Pe r Un itA nnual Fue l Pa pe r 06- 2567 Es ti mati on ofF uel Us e by IdlingC omme ri cal Tru ck s Ce nterf or Transportati on Re se ach A NL

### 7705 Technology Drive Melbourne Florida 32904

Phone 321 - 951 - 9464 Fax 321 - 728 - 9071 GHG Savings due to Reduced Weight is approximately 25 tons/year or 650,000 lbs net GHG savings over the life of the trailer . This gives a net GHG ROI of 6.7 . Estimated GHG Savings due to Increased Refrigeration Efficiency - 25% efficiency gain. Assuming 30% duty cycle it shows a 15 year GHG ROI of 1.9 The Summary for the trailer is below - the Data shows a GHG ROI of 860% and a fuel savings of over $160,000 over the 15 year life cycle. This is conservative as ROI is based on fuel savings alone and does not factor in extended life, improved thermal efficiently retention and reduced maintenance .

**134A usage in Boats** - Prisma Technology has demonstrated significant weight reductions for boats. A 1995 Baseline Sea Ray 250 converted from Wood to Prisma had a 50% reduction in hull weight (Industry Award Entry) . It allowed a V6 Engine in - place of a V8, smaller trailer, lighter tow vehicle , extended life . GHG S av in gs annual 7y r 15y r NET 15 GHG R OI M ULT Pa yloa d Effic en cy 10% 50, 904 356, 330 763, 564 649, 164 6. 674514

Fue l Us e GP H Savi ngs GHG S av/Hr hrs to GHG Bre ak e ven Days Run Ti me Duty Cycl e Pa yoff Pa yoff-Y R Li fe-Y R GHG ROI MULT Re fer 1 0. 25 5. 62340969 20344 847. 6470554 30% 2825. 49 7. 741069 15 1. 9



### Fuel S avi ngs $/YR 7y r 15y r Trans port S avi ngs 8, 713 $ 60, 989

$ 130, 691

$ Re fig erati on Sav in gs 2, 398 $ 16, 786

$ 35, 971

$ GHG S avi ngs (lb s) GHG/YR 7y r 15y r Trans port S avi ngs 50, 904 356, 330 763, 564 Re fig erati on Sav in gs 14, 778 103, 448 221, 675 To tal 65, 683 459, 778 985, 239 134AN onRe cu rri ng 114, 400 114, 400 114, 400 NET To tal GHG (48, 717) 345, 378 870, 839 Data Indi cate s that G HG p ay off in 2 y rs GHG RO I 15 Ye ars 8. 6

Boat Si ze Foam Ga l Fue l Needed (ft) 134A To O ffsetGHG Note 20 8 590 Fl oatati on Re qui re d 25 6 443 Structure Onl y-G as 40 8 509 Structure Onl y- Di es al