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<br />the dzsign life of the project and for sane ti,n,: to come after the mine
<br />is abandoned {page II-43)," Althaugtt the estim;,tcd iaading r1t~s are
<br />small in cc:~lparison to the s~li»ity atcributal•~le to irrigation raturn
<br />r'lor+s, tare cumulaiive long-ter,n effects of this added incr.:;,ettt of salin-
<br />ity is u matter of concern to CPA. 'ibis canc~l•r; stuns not only firm the
<br />possible +:a ter quality ir~:pacSS of leachotes fl•o;a ti:° mino r;~:ste disposal
<br />area itself, tut also the poLeni'ial for a sinilar l~acifing ilr•~c~ss to
<br />occur through abandoned Mina ~n'o'rkings as a result of 5u:;s~ilP:nce ol• ground-
<br />r;ater movi-mat, and 'che c~r~ulative effects o~ t1,2 s~~f~ r.:~cV,i~isms operat-
<br />ing in other mining operations in tl+o area. :+I+ile the dot-ails of sc:~r~ of
<br />these err"ects may be more appropriately addr~ss..d in 'c Co ?orthcoma,~-rg - -•-"
<br />rogioral rIS, we believe that the potasttial water qual i1:y imP>&cts of
<br />l~acPring and seepage Fran t1;2 proposed project should be ad:Eressed more
<br />tllorauahly in the FJ1R,
<br />In su^rnarizing the im~)zets of the propnscd action on t+~t~r quality
<br />in Ch~pfer III of the EAR a s~~nuer of addiiaonal raater• quality matters
<br />appear to Piave be_n ovas•ioakcd. First, no ir~entio:r is Erode rf i;he cijS-
<br />op s,;l oY_tY,c_2,'•i~~uent_1`r;,~ the n'ine's s~.:~g>' treai;ne~it plan"c. AitP'~ough
<br />we a~~ rnrorn:ed that this er'~"rlua:nt will be used in the min.'s dust: sup-
<br />pressic+t pr:tgram, :•r2 believe that this should be r:,e;ltio;;ad in tti2 EAR,
<br />'toge'ther r,ith data on the anticipated a:aaunt of r-fPlue:rt, the 1eve1 of
<br />tiraatncnt provided before disc's^:,rge, and the fate of f:he ef,`luant during
<br />the Sri~lEer renChs rrh~n its use as a dt+st cafti:rol agent may crate icing
<br />problems. A seconrl area of cnf;cern is the apparant cantradictinr,-br.•b:r::en
<br />reports fr.;r`-':';^'},Pit-ll:~r Ergin^ers. Inc. indicating L'iiaL• "r^ur ::at,~r
<br />rich~ts pul~avsos 'it hss boon assuned that all of the uet?r city;ri:~!d by
<br />}itS'iTar°1.iY1C1 15 GO~iSL'"illCively U~^-d (I/1ti177)a~' <r~,t~ ail 8~'liEr (1/11/7?)
<br />report indicating a re~i:urn of 2•i,00tl nallorfs p_+• day to the str~_tn system.
<br />(•il,ose reports r:or~ provided tc th%: Diontf•ose ~isirict Office t:~ter- publi-
<br />cation of 2h•o draft EAR.) If inched -tharo :rill ha a di;charge 20 surl`ace
<br />F!atl?:',, a Fv•int sGUI'Cc diJGhalTl~ pas'rait ;Jill bn regltired and file sl!9ject
<br />should be di;c;fsse,i in the final u;R.
<br />Koine
<br />Thy 90152 analysis pr2sent:~d in t:ha EAR dons not provide an adaquate
<br />picture ol` existing pound levels or potential noise impacts of the p'ro-
<br />ject an the en~irol.rn~ut. T;to di:,cussion of no':se in Chapt:rr II or t}u?
<br />EAR duos oat doscr•Ib•: tP,2 rrt<;L•Pfodolagical c,ppfroach used iit i:ha noi;,e
<br />analysis, ihu rationale for salec4ing nn'is~ munil;orirlg sitos, or ih~
<br />timo intor•va+ls aver rririch the r_^;.Greed sound ]w~ls Ir_r~ rraasur•:d.
<br />t;it;,out such inFor,~a•:aon, the doffs P•~.aent::d 7n the docur,:::r't af~:: Gf ~,
<br />1lraited value. In ;,ftalyzing t.o noise ifc,p~cts of pr'oj^cts such G^
<br />these th_ fpllcr;ing analytir,;;i prccerlur~s aro usually 'fnlTn::~ed;
<br />(1) Poise ~o~rc~.s and noise sa~ritive r[ceptors ar. id;;ni:i~iod,
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