§ 2708. Determination of Emissions Reduction.
13 CA ADC § 2708Barclays Official California Code of Regulations
13 CCR § 2708
§ 2708. Determination of Emissions Reduction.
(a) Calculation of Emissions Reduction. The emissions reduction verified for a diesel emission control strategy is based on the average of all valid test results before (baseline) and after (control) implementation of the diesel emission control strategy. Test results from both emission testing and durability testing are to be used. If the applicant chooses to perform either the initial or the final durability baseline test, but not both, it must use those results to calculate the reductions obtained in both the initial and final control tests.
(1) Percentage Reduction. The percentage reduction for a given pair of baseline and control test sets (where a “set” consists of all test cycle repetitions, e.g., the test set of 3 hot-start UDDS tests) is the difference between the average baseline and average control emissions divided by the average baseline emissions, multiplied by 100 percent. The average of all such reductions, as shown in the equation below, is used in the verification of a diesel emission control strategy.
Where:
Σ= | sum over all control test sets |
baselineAVG or controlAVG= | average of emissions from all baseline or control test repetitions within a given set |
Weighted Emission Result = 1/7 * average cold-start emissions + 6/7* average hot-start emissions
(B) For applicants that request verification of NOx reductions from on-road applications and submit additional test data pursuant to section 2703(e)(1)(C), weighted test results from the additional test set are included in the percentage reduction equation above. The Executive Officer shall determine an appropriate weighting factor in consultation with the applicant based on factors including, but not limited to, the amount of time that vehicles within the selected emission control group have elevated NOx emissions and the breadth of engines and applications encompassed by the emission control group.
(b) Categorization of the Diesel Emission Control Strategy. The Executive Officer shall categorize diesel emission control strategies to reduce PM and NOx emissions based on their verified emission reductions according to Table 1 in section 2702. For a diesel emission control strategy to be verified at a given Level or Mark, the emission reductions demonstrated by each test set submitted with the application must be greater than or equal to the minimum reduction that defines the Level or Mark. It is not sufficient for the average reduction to exceed the minimum value of the Level or Mark if one of the reductions in the average is below the minimum.
Credits
Note: Authority cited: Sections 39002, 39003, 39500, 39600, 39601, 39650-39675, 40000, 43000, 43000.5, 43011, 43013, 43018, 43105, 43600, 43700 and 43830.8, Health and Safety Code. Reference: Sections 39650-39675, 43000, 43009.5, 43013, 43018, 43101, 43104, 43105, 43106, 43107 and 43204-43205.5, Health and Safety Code; and Title 17 California Code of Regulations Section 93000.
History
1. New section filed 5-12-2003; operative 6-11-2003 (Register 2003, No. 20).
2. Amendment filed 1-20-2009; operative 2-19-2009 (Register 2009, No. 4).
3. Amendment of section and Note filed 8-15-2013; operative 10-1-2013 (Register 2013, No. 33).
This database is current through 3/15/24 Register 2024, No. 11.
Cal. Admin. Code tit. 13, § 2708, 13 CA ADC § 2708
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