GENERAL32022

• Permit No: M1983194
• IBM Index Class Name: General Documents
• Doc Name: COVER SHEET-2 PUBLIC COMMENTS ON DRAFT EIS & RESPONSES TO COMMENTS
• Media Type: D
• Archive: No

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p. 3-12 Yhat 1s aeent by, 'Floc 1n the loner squifer 1s towards a slot' and
the 'characteristics of any floc out of Nis sf nk are unknorm'7 AS
F1gurc 3-2 and Page 3-9 note, Nere 1s flow out of the laver aquifer
rlth dl scharges u Plceance and Tellor [reek. This appears
conslsunt rlih EPA's undersundi ng of the regional hydrogeology.
Ye suggest that these references to a ground rater 'sink' be deleted 60
from the final EIS since they aDPear to conflict rl th the other
conclusf ohs about the discharge of floc from the Basin,
p. 3-13 The bunco health standard for Fluoride concentrattan 1n drinking
rater esubilshed by fPA under the Safe Drinking Pater Act has Deen
recently changed to 4.0 mg/liter.
p. 4-4 The E15 correctly notes the[ as a result of Ne predlctl on for
exceeding the 24-hour particulate concentrattan of the Class II PSO
increments, the aDD11[ant could either have to: 1) use a different,
less conservative, model, 2) reduce the enisslon estinaLes
+ODraprlately, or 3) prorltle adds tl onal controls to assure
canpllence rlih the Class II increment standards. Uue t0 the
predicted of olation of PSO Class II increments, EPA concludes that 4
N the al ternetl ve of 500,000 TPY Is unacceptable until Nis issue 1s
'y, resolved. Ibwerer, mote that since the Wti on's current output of
e.s sodlun bicarbonate 1s less Chan Nat produced under Nis
alternatlre, re suggest that this al ternatlve be dropped from
/urther analysis. [f Nis eltcrna tl ve Is to be rcufned In Ne
analysts, Ne opal lcant's opinion of market exDanslpn that mould
peke this a plausible alurnetlve should be Included in Ne final
EIS.
p. 4-11 The conclusion by lkston 11985) that subsidence could cause a mf of ng
of the uDDer and lover aquifers regal res wch additional attention.
The EIS could present a more Norouyh eraluatlon of the quantity of
salt that could enter the groundraur systen frm the solution
url ties each year. Diffusion rates (including temperature effec[s)
groun6nur floc raus, sawreud salt content of the brine-filled 56.
cavlttes, end Ne effect of cavity collapse and subsidence iracturcc 79
on groundraur floc raus, could be evaluated Lo Dredlct the count
of sa1L cared tram Ne cantles Into the 9roun61ater system and the
erentuai, if any, fiyect on surface rear quality. EPA suggests
that conslderatlon he given to the develolr•ent of a hydrologic model
b erualeu such an eventuality using Ne dau obtained from Ne
pilot project.
p. 4-12 EPA suggests Nat consi devotion be given to separau cells, or
isolated wltiple coapletlon calif. to cant ur the Utnu aquifer, 27.
the uDDer gho9any aW1(er, the lover Whoyany aquifer, and the zone 56
adore the dl ssolutl on surface to betur detect brf na leaks.
13
p. 1-13 The proDOSaI u inject fly ash Into the caritl es 1s interesting and 16
caultl became beneficial. Mhat are the leaching cnaracteri sties pf
this fly ssh7
p. 4-25 The effectiveness of the 'rubber beds' 1n sealing small cracks 1s
questionahle, especially 1f under unsfpn. The steument on
Page 4-12 Nat 'the aDDlicant believes that the likelihood of
esuDlishing a physical connection between Ne ml ne zone and Ne 42.
groundwaur system would be for because of rubber beds and competent 6
oil shale' needs to be verified Dy wnitoring, 1f possible, during
the pl lot phase. ~"'~
p. fi.6-2 AC Ne toD of the second column, 1t Should refer to 'overlying a J 49
Class III mine zone' rather Nan Class II.
p. 8-2 Is Ne 'Yheauraft, et. al.' rcfercnce utilized In Ne EIS regarding 21
the Dotenttal change in groundwater flw as a result of subsldence7