[Code of Federal Regulations]
[Title 40, Volume 17]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR86.609-96]

[Page 31-32]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 86--CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND 
ENGINES (CONTINUED)--Table of Contents
 
  Subpart G--Selective Enforcement Auditing of New Light-Duty Vehicles
 
Sec. 86.609-96  Calculation and reporting of test results.

    Section 86.609-96 includes text that specifies requirements that 
differ from Sec. 86.609-84. Where a paragraph in Sec. 86.609-84 is 
identical and applicable to Sec. 86.609-96, this is indicated by 
specifying the corresponding paragraph and the statement ``[Reserved]. 
For guidance see Sec. 86.609-84.'' Where a corresponding paragraph of 
Sec. 86.609-84 is not applicable, this is indicated by the statement 
``[Reserved].''
    (a) Initial test results are calculated following the test 
procedures specified in Sec. 86.608(a). Round the initial test results 
to the number of decimal places contained in the applicable emission 
standard expressed to one additional significant figure. Rounding is 
done in accordance with ASTM E 29-90, Standard Practice for Using 
Significant Digits in Test Data to Determine Conformance with 
Specifications. This procedure has been incorporated by reference (see 
Sec. 86.1).
    (b) Final test results for each test vehicle are calculated by 
summing the initial test results within a specific FTP, CST, or Cold 
Temperature CO Test Procedure derived in paragraph (a) of this section 
for each test vehicle, dividing by the number of times that specific 
FTP, CST, or Cold Temperature CO Test Procedure has been conducted on 
the vehicle, and rounding to the same number of decimal places contained 
in the applicable emission standard expressed to one additional 
significant figure. Rounding is done in accordance with ASTM E 29-90, 
Standard Practice for Using Significant Digits in Test Data to Determine 
Conformance with Specifications. This procedure has been incorporated by 
reference (see Sec. 86.1).
    (c) Final deteriorated test results--(1) For each test vehicle. The 
final deteriorated test results for each test vehicle are calculated by 
multiplying the final test results by the appropriate deterioration 
factor derived from the certification process for the engine family and 
model year to which the selected configuration belongs and rounding to 
the same number of decimal places contained in the applicable emission 
standard. Rounding is done in accordance with ASTM E 29-90, Standard 
Practice for Using Significant Digits in Test Data to Determine 
Conformance with Specifications. This procedure has been incorporated by 
reference (see Sec. 86.1). For the purpose of this paragraph, if a 
deterioration factor as computed during the certification process is 
less than one, that deterioration factor is one.
    (2) Exceptions. (i) There are no deterioration factors for light-
duty vehicle emissions obtained during testing in accordance with 
subpart O of this part. Accordingly, for the CST the term ``final 
deteriorated test results'' means the final test results derived in 
paragraph (b) of this section for each test

[[Page 32]]

vehicle, rounded to the same number of decimal places contained in the 
applicable emission standard. Rounding is done in accordance with ASTM E 
29-90, Standard Practice for Using Significant Digits in Test Data to 
Determine Conformance with Specifications. This procedure has been 
incorporated by reference (see Sec. 86.1).
    (ii) There are no deterioration factors for light-duty vehicles 
tested in accordance with Sec. 86.146-96. Accordingly, for the fuel 
dispensing spitback test the term ``final deteriorated test results'' 
means the final test results derived in paragraph (b) of this section 
for each test vehicle, rounded to the same number of significant figures 
contained in the applicable standard in accordance with ASTM E 29-90, 
Standard Practice for Using Significant Digits in Test Data to Determine 
Conformance with Specifications. This procedure has been incorporated by 
reference (see Sec. 86.1).
    (d) [Reserved]. For guidance see Sec. 86.609-84.

[58 FR 58423, Nov. 1, 1993]