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<br />Lal1C COU11t)" B()ard ()f COIUl11issiollerS <br />and Eugene Cityr COUI1Cil <br />c/ 0 StephaIlie Schulz, Plal1ner <br />J aIltlar}' 22, 2007 <br />Page 8 of 9 <br /> <br />(near lvlarist High School). Please see the enclosed map Sllovving the <br />lc)catic)11 of those reportillg dust prc)blems CatlSetl by Delta's ()peratio11. <br />Sc)me complaints are rece11t. Otller c()nlplaiI1ts illdicate tl1at tlle dtlst v\'as <br />v\!()fSe \-\TheIl Delta vvas excavating t11e SOLlthvvest caf1ler of its Cllrrent site. <br /> <br />Si11ce .Delta 11as ()nl~y exaluin.cci dtlst issues \ivitlli!l 1,500 feet ()f the <br />expallSic)11 area, its a11alysis fails to ad(iress liemtlIlstrated dllst iI11pacts tC) <br />residertces locatedn1uc11 furtller a\v"ayT. Delta/s application. s110tlld be <br />dell.ied. <br /> <br />B. NOISE Is A SERIOUS ISSUE THA1~ DELTA'S ANALYSIS FAlLS <br />ADEQUATELY To ADDRESS. DELTA'S NOISE ANALYSIS UNDERSTATES <br />N OI.SE LE\'ELS IN A VARIETY OF WAYS. <br /> <br />The handvvrittel1 illus trati. OIlS prepared by the oppC)n.e11t/s acoustic <br />e:rlgil1eer Art Noxonj and SUbluitted earlier tllls mOl1tll (]al1u.a:r)T) illtlstrate <br />a series ().f serious defects i11 Delta Sand and Grav:relf s (Delta! s) nc)ise <br />a11al~y"sis. rr11ese errc)rs i.11clu.de: <br /> <br />1. Delta's truck hauling ffiovem.cnt and loadingL50 11ulnbers a.re <br />tln.derstated b\l 3 t{) 1() dB. Since Delta's calculations sl1o\iv it tC) be close to <br />tIle allo\i\'ed. ~oise tllresll()ld, c()rrectil1g this calCtllatiol1 resttlts il1 a <br />\liolatic)n of DEQ rules. <br /> <br />2. Del tal s allal )Tsis fails to account for reflected SOtllld at all, 1/\l111Cl1 call <br />llnderstate results by {j dB, \lvhicl1 cOlJ.ld cause a \riolation of DEQ rules. <br /> <br />3. T11e location ()f trtlck drivevvays al1d haul roads tl1rOtlgh the pit <br />area is a significallt factor i11 deterl111Il.ing hov\l nluch. lloise nearby <br />reside11ces \vilI experierlce. Delta's n()ise ffi()deI aSStlmes tl1at such roads <br />\;vil1 alvva)ls- 11ave mi11il11.l1Ul inlpact, regardless of \/vhere t11e trtlck path is <br />actually lc)cated. Hartl r()ads directed t()vvard and a\l\ray frolll 110ttses call <br />add tIt) to 15 d.B. Delta/s Iloise lllodel seric)usl:y llnderstates the Iloise <br />11ear()y reside11ces vvould recei\re. This/by itself, cou.ld reSltlt ill Delta's <br />exceedi11g tIle DEQ stall.tiardof al11.biel1ce pItlS Il) dl). <br /> <br />4. TIle effects of the 11aul truck lllovelnent and loading, reflections <br />and truck drivevvay locatio.us discussed above are cttnlulative. Taking <br />th()se noise ill1pacts together c()uld easil}T raise nc)ise le\lels b}T 16 to 18 <br />d,BA. That alTIOtl11t of 110ise puts the proposed Delta expa11Si()11.0peratio11 <br />substantially Otlt of compliallce v\'itll DEQ noise regulations. <br /> <br />5. Delta's Table 9, of predicted luitigated cOlnlnunity' noise impacts, <br />contail1S errors. Correctirlgfor those errors raises C()1111ntlnityr 1..410 al1d L50 <br />