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## Errata to Section 5 of the Final Report:

Section 211(B) Tier 2 High End Exposure Study of Conventional and Oxygenated Gasoline

Section 5: Effect of Ventilation, Pr oximity, and Emission Levels on InCabin Exposures of Trailing Vehicle

Prepared for

AMERICAN PETROLEUM INSTITUTE
1220 L Street Washington, DC 20005-4070

Prepared by

Barbara Zielinska, Eric M. Fujita, John C. Sagebiel, and David E. Campbell Division of Atmospheric Sciences Desert Research Institute Nevada System of Higher Education 2215 Raggio Parkway Reno, NV 895122 

### Section 5. Effect of Ventilation, Proximity, and Emission Levels on InCabin Exposures of Trailing Vehicle

Errata: Table and Figure revision s due to omission of Winter Malfunction Truck MTBE data a nd misclassification of Summer Malfunction Truck MTBE run in summary anal yses (Old Tables & Figures below Revised Versions)

Table 5.3-1. Summary of Summer and Winter Background Concentrations. Units are ppbv, except CO as noted (new)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal EtOH Acetal Mean Summer (n=6) 0.02 0.27 0.44 0.07 0.17 0.11 0.06 0.13 5.80 261 2.80 % std dev 54% 26% 15% 24% 46% 48% 131% 18% 84% (n=1) 90%

Mean Winter (n=12) 0.03 0.32 0.52 0.11 0.38 0.16 0.08 0.21 5.62 22.07 4.05
% std dev 46% 46% 67% 61% 63% 62% 101% 38% 63% 88% 42%

Mean all 0.03 0.31 0.49 0.10 0.31 0.14 0.07 0.19 5.68 81.81 3.64
% std dev 50% 42% 58% 59% 72% 63% 107% 41% 68% 147% 56%

Table 5.3-1. Summary of Summer and Winter Background Concentrations. Units are ppbv except CO as noted (old)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal EtOH Mean Summer (n=6) 0.02 0.27 0.44 0.07 0.17 0.11 0.06 0.13 5.80 261 % std dev 53% 26% 15% 24% 46% 48% 131% 18% 84% (n=1)

Mean Winter (n=12) 0.03 0.33 0.60 0.12 0.43 0.19 0.07 0.22 5.76 22.07
% std dev 47% 43% 68% 62% 65% 69% 107% 36% 61% 88%

Mean all 0.03 0.31 0.55 0.10 0.35 0.16 0.07 0.19 5.78 81.80
% std dev 50% 40% 62% 62% 77% 71% 111% 40% 67% 147%

Budi13 = 1,3BD; Benze = benzene; Tolue = toluene, Mp_xyl = m,p-xylene; o_xyl = o-xylene, Formal = formaldehyde; EtOH = ethanol, Acetal = acetaldehyde3 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal/10 Acetal/10Concentrations (ppbv or ppmv)

Mean Summer (n=6) Mean Winter (n=12)

Figure 5.3-1. Comparison of Summer and Wi nter Background Concentrations with Standard Deviations. Formaldehyde and acetal dehyde is divided by 10 for scale (new)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal/10Concentration, ppbv or ppm

Mean Summer (n=6) Mean Winter (n=12)

Figure 5.3-1. Comparison of Summer and Wi nter Background Concentrations with Standard Deviations. Formaldehyde and acetal dehyde is divided by 10 for scale (old)4 Table 5.3-2. Summary of Test C oncentrations for Su mmer, Winter and Overall. Units are ppbv, except CO as noted (new)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal Acetal EtOH Mean Summer (n=12) 0.69 1.40 2.32 0.43 1.25 0.59 0.44 1.00 6.84 5.61 2308.07
% std dev 103% 69% 56% 65% 62% 63% 230% 72% 47% 71% 102%

Mean Winter (n=24) 0.59 1.20 1.99 0. 37 1.30 0.50 0.83 1.72 4.82 2.54 1.70
% std dev 96% 76% 73% 77% 74% 76% 220% 91% 70% 75% 51%

Mean all 0.62 1.26 2.09 0.39 1.28 0.53 0.70 1.49 5.53 3.63 693.61
% std dev 100% 75% 67% 73% 70% 71% 233% 91% 63% 89% 250%

Table 5.3-2. Summary of Test C oncentrations for Su mmer, Winter and Overall. Units are ppbv, except CO as noted (old)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal EtOH Mean Summer (n=11) 0.50 1.17 2.01 0.36 1.07 0.49 0.38 0.85 6.78 2308.07
% std dev 111% 84% 70% 79% 77% 76% 269% 87% 50% 102%

Mean Winter (n=22) 0.48 1.01 1.75 0.32 1.11 0.43 0.31 1.36 4.32 1.49
% std dev 105% 81% 81% 85% 81% 84% 219% 91% 84% 48%

Mean all 0.49 1.06 1.84 0.33 1.10 0.45 0.34 1.19 5.14 770.35
% std dev 105% 81% 76% 82% 79% 80% 238% 93% 72% 214%

Budi13 = 1,3BD; Benze = benzene; Tolue = toluene, Mp_xyl = m,p-xylene; o_xyl = o-xylene, Formal = formaldehyde; EtOH = ethanol, Acetal = acetaldehyde

0 1 2 3 4 5 6 7 8

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal AcetalConcentrations (ppbv or ppmv)

Mean Summer (n=12) Mean Winter (n=24)

Figure 5.3-4. Comparison of Summer and Winter Concentrations for the Trailing tests (new)5 0 1 2 3 4 5 6 7 8

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm FormalConcentration, ppbv or ppm

Mean Summer (n=11) Mean Winter (n=22)

Figure 5.3-4. Comparison of Summer and Winter Concentrations for the Trailing tests (old)

Table 5.3-3. Summary of Concen trations Observed During Idle Tests. Units are ppbv except CO as noted (new)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal EtOH Acetal Mean Summer (n=11) 1.50 3.77 4.96 0.80 2.45 0.99 1.54 2.16 9.61 1030.68 9.04
% std dev 149% 116% 103% 110% 109% 104% 195% 160% 43% 59% 65%

Mean Winter (n=12) 0.66 2.57 3.01 0.48 1.71 0.65 0.54 3.06 6.53 3.86 3.37
% std dev 156% 137% 136% 111% 111% 96% 169% 118% 40% 61% 28%

Mean all 1.08 3.17 3.99 0.64 2.08 0.82 1.04 2.61 8.00 517.27 6.08
% std dev 163% 124% 116% 114% 110% 103% 214% 133% 46% 131% 81%

Table 5.3-3. Summary of Concen trations Observed During Idle Tests. Units are ppbv except CO as noted (old)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal EtOH Mean Summer (n=11) 1.55 3.67 4.84 0.80 2.42 1.00 1.48 2.13 8.71 1030.68
% std dev 138% 114% 101% 106% 106% 99% 195% 156% 53% 59%

Mean Winter (n=22) 0.66 2.63 3.07 0.48 1.70 0.65 0.44 3.17 6.46 3.86
% std dev 162% 140% 140% 116% 117% 101% 200% 119% 42% 61%

Mean all 1.14 3.19 4.03 0.65 2.09 0.84 1.00 2.61 7.68 517.27
% std dev 154% 123% 115% 112% 110% 102% 222% 134% 52% 131%6 Table 5.3.4. Effect of Vehicle, Fuel, and Operational Mode. Un its are ppbv, except CO as noted (new). Number of measurements = n

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal Acetal Truck only (n=12) 0.64 1.40 2.32 0.45 1.46 0.61 0.87 1.56 4.55 3.67 Car only (n=12) 0.59 1.13 1.87 0.33 1.11 0.45 0.53 1.42 5.90 3.59 Atl fuel only (n=8) 0.53 1.44 2.79 0.51 1.66 0.68 0.14 1.41 5.99 3.39 Hou fuel only (n=8) 0.89 1.52 2.20 0.48 1.58 0.66 2.17 1.91 5.61 4.37 Chi fuel only (n=8) 0.48 0.87 1.32 0.20 0.66 0.28 0.03 1.22 4.20 3.19 Normal only (n=12) 0.06 0.46 1.05 0.21 0.73 0.31 0.16 0.41 5.21 3.26 High emitter only (n=12) 1.06 1.95 2.99 0.55 1.77 0.71 1.21 2.50 5.37 3.37 St Dev high emitter only 28% 36% 38% 41% 44% 44% 177% 52% 52% 64%

Table 5.3.4. Effect of Vehicle, Fuel, and Operational Mode. Un its are ppbv, except CO as noted (old). Number of measurements = n

Vehicle, Fuel & Mode Budi13 Benze Tolue Etbz Mp_xylen o_xyl MTBE CO,ppm Formal.

Truck only (n=12) 0.42 1.14 2.06 0.38 1.24 0.52 0.15 1.08 4.23
Car only (n=12) 0.59 1.13 1.87 0. 33 1.11 0.45 0.53 1.42 6.13
Atl fuel only (n=8) 0.53 1.44 2.79 0.51 1.66 0.68 0.14 1.41 5.99
Hou fuel only (n=8) 0.56 1.05 1.63 0.35 1.19 0.50 1.28 1.10 5.88
Chi fuel only (n=8) 0.48 0.87 1.32 0.20 0.66 0.28 0.03 1.22 4.20
Normal only (n=12) 0.06 0.46 1.05 0.21 0.73 0.31 0.16 0.41 5.21
High emitter only (n=12) 1.01 1.85 2.92 0.52 1.64 0.67 0.56 2.18 5.35
St Dev high emitter only 26% 35% 40% 43% 43% 45% 199% 42% 55%

Table 5.3-5. Influence of high emitting vehicles and each fuel on traili ng vehicle in-cabin concentrations. Units are ppbv except CO as noted (new)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal Acetal High Emiter, Atl (n=4) 1.02 2.35 3.97 0.67 2.12 0.85 0.03 2.48 5.04 2.80 High Emiter, Hou (n=4) 1.43 2.18 3.08 0.69 2.24 0.93 3.45 2.81 6.00 5.77 High Emiter, Chi (n=4) 0.91 1.40 2.02 0.31 0.98 0.42 0.06 2.08 5.42 3.90

Table 5.3-5. Influence of high emitting vehicles and each fuel on traili ng vehicle in-cabin concentrations. Units are ppbv except CO as noted (old)

Mode, Fuel Budi13 Benze Tolue Etbz Mp_xyle o_xyl MTBE CO,ppm Formal

High Emiter, Atlanta (n=4) 1.02 2.35 3.97 0.67 2.12 0.85 0.03 2.48 5.04

High Emiter, Houston (n=4) 1.18 1.76 2.65 0.61 1.98 0.82 2.63 1.82 5.81

High Emiter, Chicago (n=4) 0.91 1.40 2.02 0.31 0.98 0.42 0.06 2.08 5.42

Table 5.3-6. Summary of Seasona l Differences in the High Emitter Samples. Units are ppbv except CO as noted (new)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal Acetal Summer High 1.23 2.15 3.33 0.61 1.79 0.82 0.76 1.52 8.02 7.66 Winter High 1.06 1.89 2.86 0.53 1.78 0.69 1.39 2.92 4.22 2.277 Table 5.3-6. Summary of Seasona l Differences in the High Emitter Samples. Units are ppbv except CO as noted (old)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal Summer High 1.05 2.07 3.31 0.58 1.75 0.77 0.78 1.48 8.11 Winter High 0.98 1.74 2.73 0.48 1.58 0.62 0.45 2.54 3.96

Table 5.3-7. Comparison of High and Low In- cabin Ventilation Conditions, Winter 2005 only. Units are ppbv except CO as noted (new)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal Acetal High Vent only 0.52 1.15 2.07 0.40 1.35 0.54 0.74 1.54 4.38 2.13 Low Vent only 0.64 1.24 1.91 0.35 1.25 0.47 0.91 1.89 4.65 3.08

Table 5.3-7. Comparison of High and Low In- cabin Ventilation Conditions, Winter 2005 only. Units are ppbv except CO as noted (old)

Budi13 Benze Tolue Etbz Mp_xyl O_xyl MTBE CO, ppm Formal High Vent only 0.46 1.06 2.00 0.37 1.25 0.51 0.32 1.32 4.40 Low Vent only 0.55 1.06 1.69 0.30 1.08 0.41 0.33 1.52 4.46