91.509 Calculation and reporting of test results.§ 91.509 Calculation and reporting of test results.
(a) Initial test results are calculated following the applicable test procedure specified in paragraph (a) of § 91.507. The manufacturer rounds these results, in accordance with ASTM E29-93a, to the number of decimal places contained in the applicable emission standard expressed to one additional significant figure. (ASTM E29-93a has been incorporated by reference. See § 91.6.)
(b) Final test results are calculated by summing the initial test results derived in paragraph (a) of this section for each test engine, dividing by the number of tests conducted on the engine, and rounding in accordance with ASTM E29-93a to the same number of decimal places contained in the applicable standard expressed to one additional significant figure.
(c) The final deteriorated test results for each test engine are calculated by applying the appropriate deterioration factors, derived in the certification process for the engine family, to the final test results, and rounding in accordance with ASTM E29-93a to the same number of decimal places contained in the applicable standard expressed to one additional significant figure.
(d) If, at any time during the model year, the CumSum statistic exceeds the applicable action limit, H, in two consecutive tests, the engine family may be determined to be in noncompliance and the manufacturer must notify EPA within two working days of such exceedance by the CumSum statistic.
(e) Within 30 calendar days of the end of each quarter, each engine manufacturer must submit to the Administrator a report which includes the following information:
(1) The location and description of the manufacturer's or other's exhaust emission test facilities which were utilized to conduct testing reported pursuant to this section;
(2) Total production and sample sizes, N and n, for each engine family;
(3) The FEL against which each engine family was tested;
(4) A description of the process to obtain engines on a random basis;
(5) A description of the test engines;
(6) For each test conducted,
(i) A description of the test engine, including:
(A) Configuration and engine family identification,
(B) Year, make, and build date,
(C) Engine identification number, and
(D) Number of hours of service accumulated on engine prior to testing;
(ii) Location where service accumulation was conducted and description of accumulation procedure and schedule;
(iii) Test number, date, test procedure used, initial test results before and after rounding, and final test results for all exhaust emission tests, whether valid or invalid, and the reason for invalidation, if applicable;
(iv) A complete description of any adjustment, modification, repair, preparation, maintenance, and/or testing which was performed on the test engine, was not reported pursuant to any other paragraph of this subpart, and will not be performed on all other production engines;
(v) A CumSum analysis, as required in § 91.508, of the production line test results for each engine family;
(vi) Any other information the Administrator may request relevant to the determination whether the new engines being manufactured by the manufacturer do in fact conform with the regulations with respect to which the certificate of conformity was issued;
(7) For each failed engine as defined in § 91.510(a), a description of the remedy and test results for all retests as required by § 91.511(g);
(8) The date of the end of the engine manufacturer's model year production for each engine family; and
(9) The following signed statement and endorsement by an authorized representative of the manufacturer:
This report is submitted pursuant to sections 213 and 208 of the Clean Air Act. This production line testing program was conducted in complete conformance with all applicable regulations under 40 CFR part 91 et seq. No emission-related changes to production processes or quality control procedures for the engine family tested have been made during this production line testing program that affect engines from the production line. All data and information reported herein is, to the best of (Company Name) knowledge, true and accurate. I am aware of the penalties associated with violations of the Clean Air Act and the regulations thereunder. (Authorized Company Representative.)