Analytical gases must meet the accuracy and purity specifications of this section, unless you can show that other specifications would not affect your ability to show that you comply with all applicable emission standards.
Table 1 of § 1065.750 -General Specifications for Purified Gases a
Constituent | Purified air | Purified N2 |
THC (C1-equivalent) | [LESS THAN EQUAL TO]0.05 [MICRO]mol/mol | [LESS THAN EQUAL TO]0.05 [MICRO]mol/mol. |
CO | [LESS THAN EQUAL TO]1 [MICRO]mol/mol | [LESS THAN EQUAL TO]1 [MICRO]mol/mol. |
CO2 | [LESS THAN EQUAL TO]10 [MICRO]mol/mol | [LESS THAN EQUAL TO]10 [MICRO]mol/mol. |
O2 | 0.205 to 0.215 mol/mol | [LESS THAN EQUAL TO]2 [MICRO]mol/mol. |
NOX | [LESS THAN EQUAL TO]0.02 [MICRO]mol/mol | [LESS THAN EQUAL TO]0.02 [MICRO]mol/mol. |
N2O b | [LESS THAN EQUAL TO]0.02 [MICRO]mol/mol | [LESS THAN EQUAL TO]0.02 [MICRO]mol/mol. |
a We do not require these levels of purity to be NIST-traceable.
b The N2O limit applies only if the standard-setting part requires you to report N2O or certify to an N2O standard.
40 C.F.R. §1065.750