The URL can be used to link to this page

Home My WebLink AboutSE202000018 Correspondence 2022-01-314110 ACENTECH MY January 10, 2022 Patrick May R. A. Yancey Lumber Corporation 6317 Rockfish Gap Turnpike Crozet, VA 22932 Subject Sound Levels due to Sorter Operations, Acentech Project No. 630191 Dear Mr. May: 2150 Wise Street #5852 Charlottesville, VA 22905 434 218 0759 acentech.com On January 7, 2022 we visited your lumber mill to observe and measure sound from the new lumber sorting operations. We see that you have completed the building surrounding the sorter, including insulation on the walls and a clear vinyl strip barrier at the ramped entryway. As we have noted in previous reports, the Albemarle County Code includes regulations for noise in chapter 18, section 4.18. These regulations define the daytime sound level limit as 60 dBA and outline the procedure to measure the total and ambient sound levels, and subsequently calculate the source sound level at the receiver position. The goal of the visit was to determine if the sorter operations are within the daytime sound level limit. The test condition included the temporary shutdown of all mill operations, to eliminate the generation of all exempt sounds (transportation and warning devices), and allow for measurement of just the sorter operations and other non -mill related ambient sounds. A natural assortment of lumber was fed into the sorter from the mill as it would normally be operated. We measured sound levels for more than two periods of the required 5-minute measurement. Immediately following this total sound level measurement, the sorter was switched off and a 5- minute ambient sound level measurement was made. Sound levels were measured at the closest property line to the sorter building, just beyond the fence. Subtracting the measured ambient sound level from the total sound level results in a source (sorter) sound level of 55 dBA, which is below the county's 60 dBA limit. The following table shows the sound levels measured and calculated from this test. All sound level measurements were made using an ANSI Type 1 compliant Sound Level Meter that was field calibrated prior to the measurements and laboratory calibrated annually. Total Sound Level Ambient Sound Level Source Sound Level 55 dBA 52 dBA 53 dBA CONCLUSION Based on these measurements, the sorter generated sound levels at the closest property boundary (beyond the fence) were below the daytime sound level limit of 60 dBA and in compliance with the Albemarle County noise regulations. Sincerely, Acentech Incorporated Bill Yoder Principal Scientist acoustics technology vibration III 0� �90 BUILDIN(:i SCHEDULE KEY BUILDING DATE BUILT CODE YEAR IN EFFECT USE AREA (sf) HEIGHT (ft.) NOTES 01 Office Building 1989 1987 Administration 2,094 19.7 Previously permitted and CO issued 02A Garage (original) 1978 1975 Vehicle Maintenance 746 02B Garage (addition) 1988 1987 Vehicle Maintenance 1,051 12.5 metal building frame; wood roof trusses; metal skin 03A Hyd. Oil Tanks (original) 1977 1975 Diesel, Motor/Hydraulic Oil Storage 400 15 heavy timber columns, wood beams, wood roof joists, metal roofing A 03B Hyd. Oil Tanks (addition) 1996 1993 Diesel, Motor/Hydraulic Oil Storage 200 15 steel columns, wood beams, wood roof joists, metal roofing 04 Mill Building Addition pre 1980 Saw Mill 5,203 37.4 heavy timber frame; wood roof trusses; metal skin; concrete slab/footings pJ 05 Mill Building Addition pre 1980 Saw Mill 4,050 32.5 heavy timber frame; wood roof trusses; metal skin; concrete slab/footings N A 06 Mill Building pre 1980 Saw Mill 3,762 28.8 heavy timber frame; wood roof trusses; metal skin; concrete slab/footings 07A Mill Building Addition pre 199U Saw Mill 7,342 25.5 pre-engineered metal building (frame and skin); concrete slab 07B Mill Building Addition pre 1990 Saw Mill 9,226 25.5 pre-engineered metal building (frame and skin); concrete slab 08 Shed 1996 1996 Conveyor 4,876 17 steel frame; steel roof joists; metal roof & skin 09A Lumber Storage 1991 1996 Storage 4,441 24 steel frame; steel roof joists; metal roof & skin $Zol o0 375 I 09B Shed 2013 2012 Sawdust Hopper/Feeder 352 21.8 steel frame; wood roof joists; metal roof & skin Pi7ol oa3� AG 10 Silo 1992 1990 Sawdust Storage 768 69.4 cast -in -place concrete floor, walls and roof B?,-IVo37z- 4 11 Boiler 1992 1990 Boiler/Heat Source for Kilns 2,585 27.6 pre-engineered metal building (frame and skin); concrete slab l5pp oo3Z fA 12A Kiln 1992 1990 Lumber Drying 1,823 26.1 pre-engineered metal building (frame and skin); concrete slab g�Iyoo376Ac c 12B Shed 1992 1990 Kiln Control Room 420 29.8 metal frame; metal roof & walls; concrete slab 20 ,7G G 13A Kiln 2015 2012 Lumber Drying 1,432 25 po metal frame; metal roof & walls; concrete slab 82o I oo365AG 4 13B Kiln 1997 1996 Lumber Drying 1,411 25 metal frame; metal roof & walls; concrete slab 6?0l9 no368/(� - 14 Shed 1997 1996 Lumber Stacking & Bantling 10,880 23.9 metal frame; metal roof & walls; concrete slab 15 Shed 1998 1996 Lumber Storage 13,050 29.9 metal frame; metal roof & walls; concrete slab 16 Shed 2003 2003 Lumber Storage 11,979 26.9 pre-engineered metal building (frame and skin); concrete slab 17 Drive Through/Under 1997 1996 Conveyor 1,323 25.5 metal frame and skin (No occupiable space) 18 Planer Mill (addition) 1997 1996 Conveyor 2,125 24.6 metal frame and skin, wood floor joists and floor 19 Planer Mill (addition) 1979- 1978 Planing Mill 1,134 26 steel frame 20 Planer Mill (original) 1976 1975 Planing Mill 3,065 18 steel frame; wood roof joists; metal roof & skin 21 Planer Mill (original) 1976 1975 Planing Mill 3,687 24.5 steel frame; steel roof joists; metal roof & skin >U A 22 Planer Mill (addition) 2005 2003 Planing Mill 7,331 22.4 steel frame; steel roof joists; metal roof & skin 23 Planer Mill (addition) 1981 1978 Conveyor 2,042 26 steel and heavy timber frame; metal roof; open sides 24 Shed 1989 1987 Lumber Storage 4,051 26.9 steel columns and beams; wood roof trusses, metal roof and skin �V1?o0 AC G 25 Shed (former bandsaw) 1982 1981 (former) Bandsaw 1,824 19.2 wood columns; wood roof trusses; steel roof & skin gZo(9oo36?gG G 26 Stacker (old) "97.`:. 1975 Lumber Stacker 1,749 17.6 steel frame; steel roof joists; metal roof &skin $ ? 27 Sorter/Stacker (new) (in progress) 2012 Lumber Storter/Stacker 13,700 33.9 pre-engineered metal building (frame and skin); concrete slab $Z018021 61�G Ce 28 Scale House 1980s Truck Weighing 100 11.5 wood frame with wood siding and asphalt shingle roof &&I10o oAG & Pi ymP Ek vs l 06E 20 2/ Zola v s/o,v 3111 117.8 G/.span 4iur- ,� 4W=V,9. J E v SZoZ tso 38 co ;o f�151y7. �12S12Z y�s�22 O�r l A"/22 rl/ 22 61!5/22 8310Zlo059tA/c. u r — r-All- rN"' �T�(rs��-r� -L�G1 2 01X /'!� PUn-)U5>f,0 f*g ID, g UA/o� Oa4V- AIW CoNr1XValonl 7n AWJrC PuAaP 10"t I