HYDRO30551

• Permit No: M1999002
• IBM Index Class Name: Hydrology
• Doc Date: 12/3/1993
• Doc Name: VIC FEDERAL REGULATIONS
• Media Type: D
• Archive: No

§ ias.a
(?) Which is not an exempted aquifer.
USDW means "underground source of dnnking
water."
Well means a bored, dolled or driven shah, or
a dug hole, whose depth is greater than the largest
surface dimension.
Wel! injection means the subsurface emplace-
ment of Iluids through a bored, dolled or driven
well: or through a dug well, where the depth of
the dug well is greater than the largest surface di-
mension.
Well plug means a watertight and gastight seal
installed in a borehole or well to prevent move-
mem of fluids.
Well stinudarian means several processes used
to clean rho well bore, enlarge channels, and in-
crcase pore space m the interval to be injected
thus malong it possible (or wavewater to move
more readily into the formation, and includes (I)
surging, (?) jening, (3) blasting, (4) acidizing, (5)
hydraulic (mcturing.
(Nell mnmmrmg means the measurement, by on-
site invmments or labomrory methods, of the
quality of water in a well.
(Clean Winer Act. Sale Drinking Water Act, Clean Arr
An. Resoure Conservation and Recovery Ace 32 U S C.
6905,6912.69?5,69'_7,697x)
IJS FR J2500. June 23, 19ft0, as amended m 36 Fl2
J3161, Aug. 27, 1981.37 FR 4998. Feb. t, 198?; J8 FR
IS29i, Apr. I. 1981; Si FR 37JIJ, Sept. 26. 19981
§ 146.4 Criteria for exempted aquifers.
An aquifer or a portion thereof which meets the
criteria for an "underground source of drinking
water" in § 146.3 may be delermmed under 40
CFR 144.8 to be an "exempted aqufer" if it
meets the following criteria:
(a) h does not currently serve as a source of
dnnking water; and
lb) h cannot now and will not in tht future
serve as a source of drinking water because:
(I) h is minerah hydrocarbon ar geothermal en-
ergy producing, or can be demonsuated by a per-
mit applicant as pan of a permit application (or a
Class II or III operation to contain minerals or hy-
drocarbons that considering then quanrny and lo-
cation are expected to be commercially producible.
(21 It a~situated at a depth or location which
makes recovery of water (or drinking water pur-
poses economically or rechnolog¢ally Impranical;
(3) h is so contaminated that a would be eco-
nomically of technologically impractical to render
that water ht (or human consumption: or
(4) It is located over a Class III well mining
area subject to subsidence or catastrophic collapse;
or
(c) The [oral dissolved solids content of the
ground wmer is more than 3,000 and less Than

10,000 mg/I and it is not reasonably expected Io
supply a public water system.
(Clop Water An. Safe Ddnking Water Aar. Clean Air
Act, Resource Conservation and Recovery An: J2 U.S.C.
6905, b912. 6925, fig27. 6973)
IJS FR J2500. June 24. 1980, as amended at 37 FR 4998.
Feb. i, 1982; JB FR Id293. Apr. I. 19831
§ 146.5 Classification of infection wells
Injection wells are classified as follows:
(a) Class 1. (I) Wells used by generators of haz-
ardous waste or owners or operators of hazardous
waste management facilities to inject hazardous
waste beneath the lowermost formation containing,
within one quaver ('h) mile of the well bore, an
underground source ofdrinking water.
(?) Other mdustnal and municipal disposal
wells which inject Ouids beneath the lowermost
formation containing, within one quaver mile of
the well bore, an underground source u( drinking
water.
(b) Clacc !/. Wells which in)ect 0~ids:
(I) Which arc brought to the surface m connec-
tion with conventional oil or natural gas produ<-
lion and may be commingled with waste waters
from gas plants which are an integral pan of pro-
duction operations, unless those waters are classi-
fied u ahazardous waste m the lime of injection
(?) For enhanced recovery of oil or natural gas;
and
(3) For storage of hydrocarbons which are hq-
wd ai standard temperature and pressure.
(c) Class !//. Wells which inject (or extinction
of minerals including:
(I) Mining of sulfur by the Frasch process;
Q) In situ production of uranium or other met-
als. This category includes only in-situ production
from ore bodies which have not been convention-
ally rttined. Solution mining of conventional mines
such as slopes leaching is Included in Class V.
(3) Solution mining of sans or potash.
(d) C/nss IV (U Wells used by generators of
hazardous waste or of radioacive waste, by own-
ers or operators of hazardous waste management
faciluies, or by owners or operators of radioactive
waste deposal sires to dispose of hazardous waste
or radioactive waste imo a (ortnarion which within
one quaver ('/+) mile of the well contains an un-
derground source of drinking water.
(2) Wells used by generators of hazardous waste
or of mdioaaive wave, by owners or operators of
hazardous waste managemem (aciluies, or by own-
ers or operators of mdioanive waste disposal sites
to dispose of hazardous waste or radioactive waste
above a (ortnation which within ova quaver (i/+)
mile of the well contains an underground source
of drinking water
(3) Wells used by generators of hazardous wale
or owners or operators of hazardous waste man-