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Longwall Removal <br />75.325(d) -Quantity for equipment <br />located inby fonuer <br />loading point <br />70.1900(a}(4) -Possible sampling <br />location designated by <br />the District Manager <br />75.325(g) -Quantity required to <br />be maintained during <br />removal of longwall <br />equipment <br />The following diesel-powered equipment maybe excluded from the calculations of minimum <br />ventilating air quantity under paragraph (g) for multiple units ofdiesel-powered equipment. All <br />such exclusions must be approved by the district manager and specified in the ventilation plan: <br />1. Self-propelled equipment meeting the requirements of §75.1908(b) (this would be <br />"light-duty" equipment). Generally, light-duty equipment maybe excluded from <br />the calculation if the operator can substantiate that the duty cycle of such <br />equipment will have a minimal impact on the nitrogen dioxide and carbon <br />monoxide exposure of miners. An example where the equipment may not be <br />excluded is adiesel-powered pick-up truck operated frequently in the intake <br />haulage entry during a longwall set-up, transporting supplies and personnel. The <br />use of this equipment is such that it would contribute significantly to the miners' <br />total exposure to carbon monoxide and nitrogen dioxide during the shift. An <br />example where exclusion maybe appropriate is adiesel-powered mantrip which <br />has a duty cycle that does not contribute significantly to the miners exposure <br />because the mantrip is operated only to take the crew to and from the working <br />section. <br />September 1997 <br />(Release 2) <br />L <br /> <br />