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Stone Wholesale, Inc. <br />May 7, 2012 <br />Page 2 <br />Estimated emissions at the requested sandstone quarrying activity of 8,000 tons per year are: <br />Particulate Matter — Fugitive: 2.9 tons per year. <br />PM10 (Particulate Matter less than 10 micrometers): 1.5 tons per year. <br />Compliant as operatoris well below the 70,000 annual ton limit, processing less than 3,000 tons in 2011. <br />This permit exemption is for mining activities only. Process equipment (crushers, screens, etc.) must have <br />separate permit/s. <br />No other pennit required equipment appears on site Standard quarry equipment (2loadem, 2 skidsters, <br />2 track hoe, 1 bulldozer, etc.) present, see Enclosure 3. Water buck (1, 000 gallon tank) also available <br />for use as needed. The processing equipment involved include: two 5' Cee lay hydraulic presses, one <br />8' CeeJay hydraulic press, and one Pellignni rock saw equipped with 2 Polywire 5116' diameter diamond <br />wires for cutting slab in thickness from 2.1 cm to 15.1 cm. <br />It should be noted that although exempted source may not need permits, they still are required to comply <br />with all applicable standards and regulations of the Colorado Air Quality Control Commission, including: <br />The particulate emission control measures listed on the attached page (as approved by the Division) shall <br />be applied to the particulate emission producing sources as required by Regulation No. 1, Section III.D.1.b. <br />It appeared the fugitive control plan is being followed by the operator. On -site vehicular speed is always <br />slow due to the site topography, water buck used to control fugitnre emissions from roads as needed. No <br />complaints of dust have been made to this ofte involving this source. <br />Records of actual mining activities shall be maintained and made available to the Division for inspection <br />upon request. <br />Annual drroughput records requested and provided by source. Compliant. <br />A Revised Air Pollutant Emission Notice (APEN) shall be filed: (Reference: Regulation No. 3, Part A, <br />Section II.C.) <br />a. Annually whenever a significant increase in emissions occurs as follows: <br />For any criteria pollutant: <br />For sources emitting less than 100 tons per year, a change in actual emissions of five <br />tons per year or more, above the level reported on the last APEN submitted. <br />b. Whenever there is a change in the owner or operator of any facility, process, or activity; or <br />c. Whenever new control equipment is installed, or whenever a different type of control <br />equipment replaces an existing type of control equipment; or <br />d. Whenever a permit limitation must be modified; or <br />e. No later than 30 days before the existing APEN expires_ APEN /s expires five (5) years <br />from the date /s of submittal. <br />Stone Wholesale has provided an updated APEN riling to comply with this requirement. This update is <br />only 60 days overdue. See Enclosure 2 for a copy that was filed with the Division following this <br />inspection. <br />Any changes with respect to the original submittal that would result in increases in mining activities, <br />emissions, or ambient air impacts, or that would result in the emission of any pollutants not listed in the <br />original submittal, automatically nullifies this exemption. Before actually making any such change, you must <br />apply to the Division for a new exemption based on the anticipated change. If the Division denies the new <br />exemption, you will have to obtain a permit before implementing the change. <br />