Merced Wild and Scenic River Comprehensive Management Plan / DEIS

APPENDIX G 

ON-ROAD VEHICLE CRITERIA POLLUTANT AND 

GHG EMISSION ESTIMATES 

On-road Vehicle Criteria Pollutant and GHG Emission Estimates 

Merced Wild and Scenic River Comprehensive Management Plan / DEIS G-1 

Scenario Year: 2020 

All model years in the range 1976 to 2020 Highest (Most Conservative) EMFAC2007 (version 2.3) 

Passenger Vehicles 

(pounds/mile) 

Delivery Trucks 

(pounds/mile) Emission Factors for On-Road Passenger Vehicles and Delivery Trucks 

CO 0.00444247 CO 0.00799617 Projects in the SCAQMD 

NOx 0.00040506 NOx 0.00831802 Derived from Peak Emissions Inventory (Winter, Annual, Summer) 

ROG 0.00052463 ROG 0.00122382 

SOx 0.00001073 SOx 0.00002733 Emissions (pounds per day) = N x TL x EF 

PM10 0.00009550 PM10 0.00035054 where N = number of trips, TL = trip length (miles/day), and EF = emission factor (pounds per mile) 

PM2.5 0.00006279 PM2.5 0.00027128 All the emission factors account for the emissions from start, running and idling exhaust. 

CO2 1.10456157 CO2 2.85148109 In addition, the ROG emission factors include diurnal, hot soak, running 

CH4 0.00004495 CH4 0.00005330 and resting emissions, and the PM10 & PM2.5 emission factors include tire and brake wear. 

Delivery truck Efs are an average for MDV and HDV and were used to estimate emissions for buses 

# Visitor Vehicles/day 

Air Pollutant 

Emissions 

Visitors – lbs/yr (during 

high and shoulder seasons 

(240 days)) 

Buses - lbs/yr (based on 

7 day/wk, 50 wk/yr ops) 

tons per 

year 

Minus 

Alt 1 

ALTERNATIVE 1 

18675.83 CO 433226.5723 4437.076634 219 0

NOx 39501.13542 4615.666883 22 0

VMT/day 406330.1 ROG 51161.13987 679.0979535 26 0

SOx 1046.08355 15.16690013 1 0

Annual Bus #s 10565 PM10 9312.69502 194.5154942 5 0

Annual Bus VMT 554900 PM2.5 6123.415904 150.5314838 3 0

From GHG Inventory CO2 107715988.6 1582286.856 49576.86 MT

 CH4 4383.345218 29.57545526 2.001667 MT

49619 CO2E 0

ALTERNATIVE 2 

14314.17 CO 332048.2278 4926.842256 168 -51

NOx 30275.8022 5125.145341 18 -4

VMT/day 311433.3 ROG 39212.65895 754.0569545 20 -6

SOx 801.7748937 16.84102634 0 -1

Annual Bus #s 11265 PM10 7137.752102 215.9861628 4 -1

Annual Bus VMT 616150 PM2.5 4693.316451 167.1471864 2 -1

From GHG Inventory CO2 82559347.46 1756940.073 38245.22 MT

CH4 3359.632359 32.84000137 1.538799 MT

38278 CO2E -11341

ALTERNATIVE 3 

13935.42 CO 323262.2978 4926.842256 164 -55

NOx 29474.71051 5125.145341 17 -5

VMT/day 303192.9 ROG 38175.0998 754.0569545 19 -7

SOx 780.5600896 16.84102634 0 -1

Annual Bus #s 11265 PM10 6948.888603 215.9861628 4 -1

Annual Bus VMT 616150 PM2.5 4569.132232 167.1471864 2 -1

From GHG Inventory CO2 80374843.57 1756940.073 37254.34 MT

CH4 3270.737156 32.84000137 1.498477 MT

37286 CO2E -12333

ALTERNATIVE 4 

16089.17 CO 373223.2132 5668.487342 189 -30

NOx 34030.09333 5896.641293 20 -2

VMT/day 350052 ROG 44075.14736 867.5662988 22 -4

SOx 901.1974077 19.37613174 0 -1

Annual Bus #s 12490 PM10 8022.854971 248.4988896 4 -1

Annual Bus VMT 708900 PM2.5 5275.301899 192.3081076 3 0

From GHG Inventory CO2 92796956.48 2021414.944 43008.88 MT

CH4 3776.236942 37.7834569 1.73001 MT

43045 CO2E -6574
APPENDIX G 

G-2 Merced Wild and Scenic River Comprehensive Management Plan / DEIS

# Visitor Vehicles/day 

Air Pollutant 

Emissions 

Visitors – lbs/yr (during 

high and shoulder seasons 

(240 days)) 

Buses - lbs/yr (based on 

7 day/wk, 50 wk/yr ops) 

tons per 

year 

Minus 

Alt 1 

ALTERNATIVE 5 

17812.08 CO 413190.0125 8914.933752 211 -8 

NOx 37674.22333 9273.755646 23 1 

VMT/day 387537.5 ROG 48794.95713 1364.437391 25 -1 

SOx 997.7025944 30.4731969 1 0 

Annual Bus #s 20015 PM10 8881.986511 390.8187502 5 0 

Annual Bus VMT 1114900 PM2.5 5840.210309 302.4464792 3 0 

From GHG Inventory CO2 102734166.2 3179116.266 48041.45 MT 

CH4 4180.617213 59.42273395 1.923249 MT 

48082 CO2E -1537 

ALTERNATIVE 6 

18801.25 CO 436135.8847 9362.719464 223 4 

NOx 39766.40341 9739.564522 25 3 

VMT/day 409058.8 ROG 51504.71007 1432.971335 26 0 

SOx 1053.108474 32.00382657 1 0 

Annual Bus #s 20715 PM10 9375.233979 410.4490758 5 0 

Annual Bus VMT 1170900 PM2.5 6164.537411 317.6379787 3 0 

From GHG Inventory CO2 108439350.2 3338799.207 50701.71 MT 

CH4 4412.781363 62.40746182 2.029911 MT 

50744 CO2E 1125