PERMFILE111851

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 5/1/2003
• Section_Exhibit Name: Tab 07 Hydrologic Description
• Media Type: D
• Archive: Yes

Table 7-1. Description of Geologic Units end Their Hydrologic Properties,
Seneca II-W Area
(Adapted Irom Brogden and Giles, 1977)
Maximum
Thldcness
System Series Geologic Unh Symbol (feet) ~ Physical Characteristip Hydroogic Charaderistia
Dark-gray to bluish, homogenous, marine Reported well yields are less than 5 gal/
shale whh several thin Interbedded Mn. Water la predominantly a caldum
aandstanes and calcareous conaetlons. bk:erbonate type. Dissolved-slide
Lewis ooncentratlon ranges from 272 ro 4,230
Shale Kls 1,900 mgA. ~ Water may contain concentretlons
of Iron, manganese, nhrate, selenium, and
sullafe In excess o1 U.S. Public Health
Servce (! 962) atandarda for drinking
Upper water.
Cretaceous Sardarone, NgM•brown to greylah•whlte, Reported well yields ere es much as 100
with Interbedded gray carbonaceous shale, geVrtYn, but average less then 10 gaVmin.
mar, and linker beds. The wai beds rAwalg w@Ila Wfl YM IVIIIId PI IIUiI atlaa~l,
Williams are al economic Impotence and more valleys and In areas where sandstones are
Fork Kw 2,100 numerous than those of the Iles Fomatlon. overlain by Lewle Shale. Water Is
Formation The very Ma to 9ne~relned, IlpMyray predominemly caldum end sodum
ro white, massive, crossbedded Twentymlle bicarbonate types. Water In confect with
0
Sandatona Merrbw Is • prominent ledge-
Ovate may be a caidurn satiate Type ar~d
n
'o ~
Y
taming sandstone about 800 to 9001eB[
canlaln 9uorlde, Iran, manganese,
u v above the bane 01 the lormation. selenium, and whale In exoeaa of U.S.
c A Interbedded IIgM-brown to whhe, massive, Publb Heahh Service (1962) standards fo
u ~ one-grolnad, ledge•foming sendarone, drlnldng water. Dissolved-colitis corx:en-
brown rodads trarboneceous shale, sandy hatlan ranges Irom 334 to 1,460 rtgA end
Iles shale, and Oval. The Trout Creek Sand averages 746 rtgA. Hydraulb-wnductiviry
Formation KI 1,500 stone Member, a 50- to 100•It thldc, IIgM• values fa treclured aendstonea rerge Irom
brown to IlgMyrey, fine-grained, messlvA 3.7 to 26 frld.
sandstone, la located et the top of the
lormatlon.
Ughtgray to dark~rey fosslliferoua marine Reported well yields ere leas then 5 gaVmin.
shale whh Interbedded sandstones end Ilme- Water Is predominemly a caldum bicar-
sronea. The sandstones ere generally thM bonete type. Dissolved-solies concentration
Upper bedded, Tina grained, tan, and lossllilerous, ranges fmm 338 to 2,590 rtgA. Water may
and Mancoa and form resistant ledges In the basal end contain mncentratbns o1 chloride, huoride,
Lower Shale Km 5,300 upper parts of the formation. The Overall Iron, end manganese In excess of U.S.
Cretaceous arse oocupled by the Mancos Shale Is Public Heahh Service (1962) standards for
characterized by a rolling hummocky drinking water.
topography.
• •