Public Workshop to Discuss the Need for Amendments to the Alternative Fuels Regulations Regarding Motor Vehicle LPG & CNG June 21, 2000 California Environmental Protection Agency Air Resources Board

Overview F Background F LPG Issues F CNG Issues F Draft Concepts F Future Activities

Alternative Fuels Regulations F Title 13, CCR, sections originally adopted in 1992 F Provides engine manufacturers with a known fuel quality for designing engines F Ensures consistent fuel quality to prevent engine performance problems and excess emissions Background

Propane (min.) 85 vol% Propene (max.)10.0 vol% Pentenes +heavier (max.)0.5 vol% Butene (max.)2.0 max% Vapor Pressure (max.) 208 psig Volatility Residue: (max.) - Evap. Temp, 95% -37 o F, or - Butanes 5.0 vol% Residual Matter: - Residue on evap. of0.05 ml 100 ml on oil stain obs. Sulfur (max.) 80 ppmw Water, Corrosion, Odorant Motor Vehicle LPG Specifications Background

Motor Vehicle CNG Specifications Methane (min.) 88 mol% Ethane (max.) 6 mol% C3+higher (max.)3 mol% C6+higher (max.) 0.2 mol% Hydrogen0.1 mol% Carbon Dioxide0.1 mol% Oxygen1.0 mol% Inert Gases mol% Sulfur (max.) 16 ppmv Water, Particulates, Odorant Hydrocarbons Other Species Background

LPG Issues F Limited Northern CA. availability of LPG meeting the MV fuel specifications –Production- Refinery by-product, commercial vs. MVgrade –Distribution- No segregated system to handle two fuels F Limited supplies of MV LPG may affect the use of existing and siting of new LPG fleets F Transport/delivery trucks are fueled on the same LPG they carry as product F Safety concern with use of ASTM D to determine sulfur content of LPG

CNG Issues F Limited availability of CNG meeting the MV fuel specifications in parts of San Joaquin Valley and South Central Coast –Production- Associated gas/oil production; commercial vs. MV grade –Distribution- No segregated distribution system to handle two fuels F CNG associated with oil production contains ethane in excess of 6 mol% F CNG fueling stations must blend to comply with CNG MV fuel specs F No new CNG fueling stations in these areas limit the siting of new CNG fleets

Draft Concepts F Evaluate captured fleet exemption for CNG & LPG F Consider LPG delivery truck exemption F Consider an alternative LPG sulfur test method(s)

Captured Fleet Exemption Considerations F Engine durability, performance, emissions F Liability F Misfueling F Fleet Management & Recordkeeping F Duration of exemption Draft Concepts

Captured Fleet Exemption F Limited geographic applicability F Applies only to commercial fleets w/central fueling facilities F Fleet owner uses off-spec fuel at own risk –Memorandum of understanding between fuel supplier, fleet owner & engine manufacturer F Fleet owner to safeguard against misfueling F Fleet owner must maintain records F Sunset provision Draft Concepts

F Unavailability of complying MV LPG/CNG at publicly accessible fueling locations –Consider requirement to maintain current supplies of complying fuel for public access vehicles Captured Fleet Exemption Potential Concern Draft Concepts

F Consider LPG delivery truck exemption –Permanent vs. temporary F Consider alternative LPG sulfur detection test method(s) –Demonstrate stringency to 80 ppmw sulfur limit –Reproducibility and acccuracy to ASTM D 2784 Other Amendments Draft Concepts

Future Activities F Work with stakeholders to fully develop appropriate concepts F Next workshop planned for late July 2000 F Tentative Board hearing scheduled for October 2000