1. Cargo Tank Program Emissions and Regulation Development Public Workshop March 2, 2005 ARB, MLD 1st Floor Conference Room 1927 13th Street Sacramento, CA 95814

2. Topics of Discussion Background Emission Sources Inventory Refinement Actions Regulation Development Actions Closing Remarks 2

3. Topics of Discussion Background Emission Sources Inventory Refinement Actions Regulation Development Actions Closing Remarks 3

4. Background State Implementation Plan Obligations Clean Air Act established standards for criteria pollutants State developed plan (SIP) to reduce criteria pollutants in ambient air ARB must achieve 2010 SIP obligations SIP specifies reductions from gasoline cargo tankers 4

5. Topics of Discussion Background Emission Sources Inventory Refinement Actions Regulation Development Actions Closing Remarks 5

6. Emission Sources Product Delivery Hoses Calculation of product hose emissions Calculating wetted wall losses 6

7. Emission Sources Product Delivery Hoses Approximately 15 billion gallons of gasoline delivered in California in 2001 –(National Petroleum News, Market Facts July 2002) 41 million gallons per day Approximately 10,250 deliveries per day (assuming 4,000 gallons per delivery) 7

8. Emission Sources Product Delivery Hoses Hoses/elbows transported open to the atmosphere either in tubes or on trays One 20’ product hose used for each delivery Based upon number of daily deliveries and lab testing Emissions of approximately 1 ton per day from wetted hose losses (314 gallons of lost product) 8

9. Emission Sources Cargo Tank Degassing Degassing only required prior to annual certification testing No existing requirement for degassing prior to repair 9

10. Emission Sources Cargo Tank Degassing Variables associated with degassing –Inventory accuracy (population and capacity) –Degassing frequency –Control method used in degassing –Volume of liquid retained in bottom of tank after delivery Initial emissions estimate of 5 tons per day 10

11. Emission Sources In-Use Violation Database Search Results Review of Past Cargo Tank NOVs Looking for trends in equipment failures Looking for common repairs 11

12. Emission Sources In-Use Violation Database Search Results Review of Past Cargo Tank NOVs 2000 - 2003 217 Closed Case Files Reviewed Information Gathered Included –Date Of NOV –CT Number –Violation Recorded –Test Procedure Used –Corrective Action Taken 12

13. Emission Sources In-Use Violation Database Search Results ARB Enforcement Division Cargo Tank NOV Sample 13

14. Emission Sources In-Use Violation Database Search Results 14

15. 29% 12% 3% 10% 13% 4% 9% 2% 5% 0% 1% 4% 5% Replace Gaskets - 72 Replace PV Valve 29 Repaired PV Valve 8 Replace Internal VV - 24 Repaired Internal VV - 33 Weld Cracks - 9 Tightened Gaskets and or Fittings - 21 Replace Vapor Rail Hose 6 No Maintenance Performed - 13 Install Turnover Rail Plug - 1 Repair Liquid Leak 2 No Maintenance Specified - 10 Replace OR Repair Vapor Hoods - 12 Repaired Scully Leak - 2 Replace Dome Lid - 1 Replace leaking Loading Head - 1 Replace 4" Vapor Connection - 1 Replace Kamlock Cams -1 R&R Poppet Seal - 1 15 Repairs Reported on Cargo Tank Violation Reports

16. Emission Sources In-Use Violation Database Search Results 16

17. Further Review of Past Cargo Tank NOVs Record Certification Test Date of CT’s just prior to issuance of NOV Use this information to develop average time between certification test date and date of NOV. Information may be used to develop equipment durability and pressure integrity trends 17

18. Emission Sources In-Use Violation Database Search Results Further Review of Past Cargo Tank NOVs Review inspection forms and record final pressures from testing Information will be used to determine average leakrate of failures Current emission estimate due to marginal exceedance of allowable leakrate: about 12 tons per day We are convinced the final estimate will be significantly higher than 12 tons per day 18

19. Emission Sources In-Use Operation of PV Vent Valve Ambient temperature and sunlight affect tank pressure Vapor filled tank pressurizes to cracking pressure rapidly PV vent valve cracking pressures are higher under static conditions than dynamic conditions (road vibrations) Emission impact due to dynamic effect on PV vent valve to be determined 19

20. Emission Sources Initial Emission Estimates Product delivery hoses: 1 ton per day Degassing: 5 tons per day In-Use –Violation Database: 12 tons per day –Pressure Vacuum vent valve: to be determined Combined initial emissions estimate at least 18 tons per day - we expect the estimate to be much higher 20

21. Topics of Discussion Background Emission Sources Inventory Refinement Actions Regulation Development Actions Closing Remarks 21

22. Inventory Refinement Actions Degassing Survey Degassing survey drafted Initially directed to repair shops Changes to survey based on initial comments response requested by March 16th Conduct pilot survey to be completed before April 1st Survey sent to industry response requested by April 15th 22

23. Inventory Refinement Actions 5 Point Test Purpose –Obtain data for estimating PV vent emissions Record CT pressures and ambient temperatures during delivery cycle –At rack after loading –At station prior to delivery –At station after delivery –At station just before leaving –At rack prior to loading Record time and distance between rack and station 23

24. Inventory Refinement Actions 5 Point Test Camlock caps with pressure relief valves Analog pressure gauge Temperature transducer (not shown) 24

25. Inventory Refinement Actions 5 Point Test Industry involvement –access to trucks during delivery cycles –No response from initial request of November 2004 Initial testing period –approximately one month Initial goal –50 observed delivery cycles 25

26. Topics of Discussion Background Emission Sources Inventory Refinement Actions Regulation Development Actions Closing Remarks 26

27. Regulation Development Actions Possible Control Measures Hoses –Require poppetted adapters and/or dust caps for cargo tank fittings and product delivery hoses Degassing –Require controlled degassing for repair 27

28. Regulation Development Actions Possible Control Measures In-Use –Add butterfly valve to vapor return line –Redesign of internal vapor valve –Develop specifications of gasket materials –Cargo tank component certification program –New pressure/vacuum vent specifications –Cargo tank onboard diagnostic system for monitoring system pressure integrity –Semi-annual certification 28

29. Regulation Development Actions Modifications to Test Procedures Develop new test procedures as necessary Modify existing test procedures as necessary 29

30. Regulation Development Actions Establish Working Group Department of Transportation (DOT) US Environmental Protection Agency Cargo Tank Industry 30

31. Topics of Discussion Background Emission Sources Inventory Refinement Actions Regulation Development Actions Closing Remarks 31

32. Future Plans Reassess emission estimates –Hoses - Spring 2005 –Degassing - Spring 2005 –In-Use - Fall 2005 Work with industry in developing control measures - 2006 Board hearing - end of 2006 Implementation - 2008 and beyond 32

33. Cargo Tank Program Website http://www.arb.ca.gov/enf/cargotanks/cargotanks.htm –Information about program –Copies of test procedures, presentations, etc. –Workshop notifications –Sign up for e-mail notifications of upcoming events 33

34. ARB Contacts Ranjit Bhullar - Manager –phone- (916) 322-0223 –email- rbhullar@arb.ca.gov Paul Thalken - Air Resources Engineer –phone- (916) 445-9499 –email- pthalken@arb.ca.gov Chris Clarke - Air Resources Engineer –phone- (916) 324-1278 –email - cclarke@arb.ca.gov 34

35. ARB Contacts Neil Nipper - Air Resources Engineer –phone- (916) 445-9391 –email - rnipper@arb.ca.gov Kathryn Gugeler - Air Pollution Specialist –phone- (916) 322-0221 –email - kgugeler@arb.ca.gov 35

36. Questions? 36