"Table 4-30b:  Federal Exhaust Emission Certification Standards for Newly Manufactured Gasoline- and Diesel-Powered Light Duty Trucks (Category LDT2) a,b,c (Grams per mile)",,,,,,,,,,,,,,,,,,,,,,
Engine type,Prior to,1968-,1970-,,1973- ,,1976-,1979-,1982-,,1985-,,1988-,1991-,Tier 1k,,,,Interim Tier 2k,,Tier 2k,
 and pollutant, controlg,1969,1971,1972,1974,1975,1978,1981,1983,1984,1986,1987,1990,1993,1994,,1995-2003,,2004-2006,,2007+,
Gasoline,,,,,,,,,,,,,,,,,,,,,,
HC (total),11,e,2.2,3.4,,2.0,,1.7,,0.80 ,,,,,j,(0.80),,,j,,,
  NMHC,h,j,,,,,,,,,,,,,j,(0.40),,,j,,,
  NMOG,h,j,,,,,,,,,,,,,,,,,0.125,(0.156),0.100,(0.125)
CO,80,I,23,39,,20,,18,,10,,,,,4.4,(5.5),,,3.4,(4.2),,
Cold-temp. COd,h,j,,,,,,,,,,,,,12.5,(j),,,,,,
NOx,4,j,,,3.0,3.1,,2.3,,,,,1.7,,0.7,(0.97),,,0.4,(0.6),0.14,(0.20)
Particulates,h,j,,,,,,,,,,,,,,,0.08,(0.10),0.08,(0.08),0.02,(0.02)
Formaldehyde,h,j,,,,,,,,,,,,,,,,,0.015,(0.018),,
Diesel,,,,,,,,,,,,,,,,,,,,,,
HC (total),11,j,,,,,2.0,1.7,,0.80 ,,,,,j,(0.80),,,j,,,
  NMHC,h,j,,,,,,,,,,,,,0.32,(0.40),,,j,,,
  NMOG,h,j,,,,,,,,,,,,,,,,,j,(0.156),0.100,(0.125)
CO,80,j,,,,,20,18,,10,,,,,4.4,(5.5),,,j,(4.2),3.4,(4.2),,,,,,,,
NOx,4,j,,,,,3.1,2.3,,,,,1.7,,j,(0.97),,,j,(0.6),0.14,(0.20),,,,,,,,
Particulates,h,j,,,,,,,0.60 ,,,0.50 ,0.45,0.13,,,0.08,(0.10),j,(0.10),0.02,(0.02),,,,,,,,
Formaldehyde,h,j,,,,,,,,,,,,,,,,,j,(0.018),0.015,(0.018),,,,,,,,
LDT2 weight criteriae,,"GVWR up through 6,000 pounds",,,,,,"GVWR up through 8,500 pounds",,,,,"GVWR up through 6,000 pounds; LVW over 3,750 pounds",,,,,,,,,,,,,,,,,
Test procedureb,,7-mode,,CVS-72,,CVS-75,,,,,,,,,,,,,,,,,,,,,,,,
"Useful life (intermediate)c, f",,j,,,,,,,,,,,,,"5 years/50,000 miles",,,,"5 years/50,000miles",,,,,,,,,,,
                     (full),,"5 years/50,000 miles",,,,,,,,,"11 years/120,000 miles",,,,"10 years/100,000 miles",,,,,,"10 years/120,000 miles",,,,,,,,,
KEY: CO=carbon monoxide; GVWR=gross vehicle weight rating; HC=hydrocarbons; LVW=loaded vehicle weight; NMHC=non-methane hydrocarbons; NMHC=nonmethane hydrocarbons; NMOG=nonmethane organic gases; NOx=nitrogen oxides. ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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"a Light-duty truck categories LDT1-LDT4 were not created until 1994.  From 1968 to 1978 all trucks with a GVWR up to 6,000 pounds were classified as light-duty trucks and were required to meet the same standards.  As of 1979, the maximum weight was raised to 8,500 pounds GVWR.  During 1988-93, light-duty trucks were divided into two subcategories that coincide with the current LDT1-LDT4 categories.  The standards for LDT1, LDT3, and LDT4 are shown in tables 4-30a, 4-40c, and 4-30d.",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"b The test procedure for measuring exhaust emissions has changed several times over the course of vehicle emissions regulation.  The 7-mode procedure was used through model year 1971 and was replaced by the CVS-72 procedure beginning in model year 1972.  The CVS-75 procedure became the test procedure as of model year 1975.  While it may appear that the total HC and CO standards were relaxed in 1972-74, these standards were actually more stringent due to the more stringent nature of the CVS-72 test procedure. Additional standards for CO and composite standards for NMHC and NOx tested over the new Supplemental Federal Test Procedure will be phased-in beginning with model year 2000.  These standards are not shown in this table.",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"c Emissions standards had to be met for a useful life of 5 years/50,000 miles through model year 1983, and a full useful life of 11 years/120,000 miles was defined for 1985-93 (several useful life options were available for 1984).  Beginning in model year 1994, emissions standards were established for an intermediate useful life of 5 years/50,000 miles as well as a full useful life (full useful life standards are shown in parentheses).  HC standards, however,  were established only for full useful life. Tier 1 exhaust standards, except particulates standards, were phased-in during 1994-96 at a rate of 40%, 80%, and 100%, respectively.  Particulates standards were phased-in at a rate of 40%, 80%, and 100% during 1995-97.",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"dThe cold CO emissions standard is measured at 20 degrees F (rather than 75 degrees F) and is applicable for a 5-year/50,000-mile useful life.",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
eGVWR is the maximum design loaded weight. LVW is the curb weight (nominal vehicle weight) plus 300 pounds.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"f Manufacturers can opt to certify vehicles for a full useful life of 15 years/150,000 miles and either have (1) intermediate useful life standards waived or (2) receive additional NOx credits. ",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"g The ""Prior to controls"" reports emissions estimates of a typical newly manufactured car in the years before exhaust emissions certification standards were implemented.",,,,,,,,,,,,,,,,,,,,,
h No estimate available.,,,,,,,,,,,,,,,,,,,,,
"i In 1968-69, exhaust emissions standards were issued in parts per million rather than grams per mile and are, therefore, incompatible with this table.",,,,,,,,,,,,,,,,,,,,,
j No standard has been set.,,,,,,,,,,,,,,,,,,,,,
"k The term ""tier"" refers to a level of standards for specific years.  Interim 2 refers to an intermediate level of standards that move manufacturers toward compliance with Tier 2 standards. Interim Tier 2 and Tier 2 standards are established as ""bins."" Each bin is a set of standards for NOx, CO, NMOG, formaldehyde, and particulates (HC and NMHC standards are dropped for Tier 2 and Interim Tier 2). Manufacturers may certify any given vehicle family to any of the bins available for that vehicle class as long as the resulting sales-weighted corporate average NOx standard is met for the full useful life. The Tier 2 corporate average NOx standard is 0.07 grams/mile. Interim corporate-based average NOx standards are based on vehicle type. The interim corporate sales-weighted average for LDT2 vehicles is 0.3 grams/mile. Tier 2 standards will be phased in at a rate of 25% in 2004, 50% in 2005, 75% in 2006, and 100% in 2007. During this period all LDT2 vehicles not meeting the Tier 2 standards must meet Interim Tier 2 standards.",,,,,,,,,,,,,,,,,,,,,
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SOURCE:,,,,,,,,,,,,,,,,,,,,,
"40 CFR 86, Subpart A (July 1, 2000) Federal Register, Vol. 65, No. 28, pp. 6851-6858.",,,,,,,,,,,,,,,,,,,,,
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