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' Chapter 8 <br />GUIDANCE FOR VENTILATION PLAN APPROVAL <br />IN MINES WHERE DIESEL-POWERED EQUIPMENT IS OPERATED <br />Individual Units ofDiesel-powered Equipment <br />§75.325(f)requires that a minimum quantity of ventilating air be maintained where individual units <br />ofdiesel-powered equipment are being operated. The minimum ventilating_air quantities for <br />individual units of equipment are not required to be specified in the ventilation plan. Paragraphs <br />(f)(1) through (f)(3) indicate the locations where the minimum ventilating air quantity must be <br />maintained. <br />Paragraph (f)(1) requires the minimum ventilating air quantity to be maintained in any working <br />place where the equipment is being operated. It is anticipated that this quantity will be measured <br />in the same required location as the quantity reaching the working face, described in <br />§75.325(a)(2). This would necessitate making only one air quantity measurement to determine <br />compliance with both §75.325(a)(1) and §75.325(fJ(1). However, an air quantity measurement in <br />the entry of the working place would also be acceptable. <br />Paragraph (f)(2) requires the minimum ventilating air quantity to be maintained at the section <br />loading point during any shift when equipment of the type that can be used to perform work at the <br />section loading point is on the working section. The location for this quantity is required by <br />§75.371(11) to be specified in the mine ventilation plan. <br />Paragraph (f)(3) requires the minimum ventilating air quantity to be maintained in the entry where <br />the equipment is being operated outby the section loading point in areas of the mine developed on <br />or after Apri125, 1997. This quantity can be determined either within one crosscut of the diesel- <br />powered machine or with the machine pulled into a crosscut. <br />' Paragraph (f)(4) requires the minimum ventilating air quantity to be maintained in any air course <br />with single or multiple entries where the equipment is being operated outby the section loading <br />point in areas of the mine developed prior to Apri125, 1997. This quantity can be determined <br />' either within one crosscut of the diesel-powered machine or with the machine pulled into a <br />crosscut. However, air quantity measurement locations in a multiple entry air course should be <br />made in each entry directly across from the previous entry's measurement location. <br /> <br /> <br />September 1997 (Release 2) <br />