Enforce-ment personnel shall not use methane monitor readings as a basisfor issuing citations or orders. A district manager may not grant exceptions to these provisionsto operators of mines opened after March 30, 1970. 75.360 Preshift Examination Roadways and track haulageways must be examined 3 hours immedi-ately preceding each shift. This examination must include testsfor methane in all high cavities where methane could accumulate. While traveling haulage roads, travelways, or belt conveyors, ifhigh cavities in the roof are observed, the inspector should lookfor some method that has been provided for the preshift examinerto make such tests.
Examples are ladders, tubes, methane detec-tors with probes, etc.
Lack of some method to safely make suchtests would be a good indication that tests were not being madeor not properly being made. This could require issuingappropriate citations or orders. As stated in the preamble to the final rule, thisinformation is necessary for plan approval. It is not intendedthat enforcement personnel use engineering instruments to measureprecise angles during inspection activities. Rather, the generalspray direction and orientation and other parameters such asnumber of sprays, orifice size, and operating pressure would bedetermined by comparison with the requirements of the approvedventilation plan.