Laserfiche WebLink
:. III IIIIIIIII IIII III ^. °' .1. 11.,... y-.~,A.: "i' •_-:~'. •"L: {I <~, ''vl. ~ ..~.:..... vr.: .•... + .._.: ~„^ ~. •. •~ t ..~.. <br />'~ Southdown <br />= Lyons Cement Plant <br />May 21, 1998 <br />her. Robert lorgcnson Mr, Jeff T1+yach <br />Supcn•Isor• Field Services Scctlon Boulder County Ha•+IUt <br />Air Pollution Control Decision Envlronmcnlal Ha+Ith <br />Colorado Department of Public Ha•+Ith and Em•Ironmcnt 3430 Broad+tny <br />4300 Chem Creek Drl+•c South Boulder, CO 80704 <br />Dcnt•cr , CO 8026) • I S70 <br />Rc: Closure: OId Dagitotrse Dust PiUNc++• Dus! Pil Dcslgn/Fugliive Dust Control Plan <br />Southdo++m Inc., Lyons Cement Plant <br />Lyons, Colorado <br />Dcnr Mr, lorgcnson end Mr. Za}•ach: <br />It Is Sotttl+do++•n's polic}• to tcork s+•Ith concerned comm+tnlty groups, the county end Il+e tract to comply <br />cultic nil regrrlatlons and resolt•c pending concerns promptly , The lotto+ving Is a time line for ll+c Old <br />Dust Pit rcclnn+atlon, nct+• plc design eoncepli end nn enhnnad Ngltlt•e dust control plan, <br />OLD DUST PIT ACTfON AND TIMING <br />~• ,; <br />~s stated In our Icucr of March 9,1998 rcclamatlon has begun on "13/D ph",(dust storage plc). As of this <br />Icucr, I+alf of lire pll has been eo+•cred• Wa aro e~pediting (Ira ralatnatlon process,. The reminder of tl+c <br />pttuillbcco~~i:rcd bylhcendoflutic,d998, ~?:-_~~`rt£t';t~~'kp's'1,.~,~r:~+• ; <br />NEW DUST PIT DBSION ~: ~. rA • ~ • . • ' <br />y,•P ,pY ., ^r ~ ~ y. ,. 1:, i,.`.r `.. •'! r ~ ~x'`'Y ~'.~~ j L~ j•.' ~ T t'% <br />Tho nca• dust stomgc plc will be "C •plt", "C •plt" Is closer to rho plant and trill reduce travra distnncc <br />b}• 7SY°. Tl+c equal plc has en area of about 20 ecrcs end Is ntrrcntly 20 to ~ 100 feet bclo+v the e!clsting <br />ground tact. Thcrc Is a partially tegetated ++•Ind break elona the nest rim of the plc. Of tl+c 20 acres, <br />oral}• about sn•cn ecrcs nl one time alit be used for dust stomgc. The rcntalning 17 ecrcs will be covered <br />with shale. A sprinkling nstctt+ Is being Installed to act the dust disposal crest in the pit on n regular <br />bisis. Tl+c mss of tl+ls proJcct Is nbout fG0,000 end Is protected to be Insulted by the end of lune,1998. <br />FUGITIVE CONTROLS/MONITORING/RECOItD KEEPING <br />The d+ist from Il+c bagltousc Is controlled by a pe11e1izing process (pugging) crherc by the dust Is erposcd <br />to n a•atcr spnr ns the dust exits the silo and posses along a paddle serce• mme}or forming pebble sirs <br />pellets. These pellets ha+c n moisture content of 20 to 25%, These pellets then drop Into our haul truck <br />for direct transport the dust pit. (Wc ha+c Increased tl+c size of our hiul trucks from SO ton capacity l0 93 <br />ton capacit}• which reduces the member of trips taken.) To reduce erposurc the truck is only larded to SO <br />to 73"/0 of capacity. This process ++as ailncsscd during our (996 Boulder County inspection. <br />The frequency of dust disposal caries greatly with process changes and duri sales demand , There may be <br />no loads to sacral loads of dust hauled a day. On the avenge ,4S loads maybe hauled in a acck. The <br />haul trucks arc used during the dar for regular quam operations. To marlmize the use of our equipment, <br />c+c generally haul dust during the e+cning and throughout the tvttkend. <br />It is our polic~• to apply, em ironmcntally talc Magnesium Chloride to our heacilytnalcd haul roads <br />including lire road to the dust pit. We have applied this preparation for the past three }cars end will <br />again this year. This years annual application sill dart on May, 22 1998. Additiomlly, there Is dally <br />. `' 1 <br />~. n <br />• :` <br />.~ . <br />ss. <br />r. o. eon szq ;;~j~i~++~~~_o~vroaQ~ptis4o <br />~rposj eaa h too •;~4x~I3o7)'a2a ~ 199 <br />_ -" ~'', <br />