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1 17-3.403 Classification of Ground Water, Usage,
2 Reclassification.
3 (1) All ground water of the State is classified according
4 to designated uses as follows:
5 CLASS G-I Potable water use, ground water in single
6 seeree aquifers which has a total dissolved
7 solids content of less than 3,000 mg/l in an
8 4--unconfined or leaky confined aquifer, and is
9 restricted to zones of protection around major
10 public community drinking water supplies, and
11 has been reclassified as G-I by the Commission.
12 CLASS G-II Potable water use, ground water in aquifers
13 which has a total dissolved solids content of
14 less than 10,000 mg/l, unless otherwise
15 classified by the Commission.
<-6 CLASS G-III Non-potable water use, ground water in
17 unconfined aquifers which has a total dissolved
18 solids content of 10,000 mg/l or greater, or
19 which has total dissolved solids of 3,000 -
20 10,000 mg/l and either has been reclassified by
21 the Commission as having no reasonable potential
22 as a future source of drinking water, or has
23 been designated by the Department as an exempted
24 aquifer pursuant to Section 17-28.13(3), F.A.C.
25 CLASS G-IV Non-potable water use, ground water in confined
26 aquifers which has a total dissolved solids
27 content of 10,000 mg/l or greater.
28 (2) The intent of establishing G-I eligibility criteria is
f0'3 to determine which aquifer or aquifer segments qualify for
30 potential reclassification to G-I aquifers. Adoption of these
31 criteria does not imply nor does it designate aquifer or aquifer
Y. 16
1 segments as G-I. Such designation can only be achieved through
2 reclassification by the Commission after eligible segments
r-3 have been mapped by the Department. It-shall-be-e- -Bepartment
4 peoiey-te-affeod-the-highest-preteetion-te-single-seeree
5 aquifers9--Upen-pettin-by-an-affeeted-parfy-as-prevtded-tn
6 sbsee tien-+6+7-the-eemmissen-may-reelasstfy-aqtifers-er
7 peotifes-e9 -aqutter9-as-eass-9-6-i-gepon-waterr
8 (3) through (4) No change.
9 (5) Reclassification of ground water as provided in
10 subsection (1) above shall be accomplished in the following
11 manner:
12 (a) Any substantially affected person or water management
13 district may seek reclassification of any ground water of the
14 State by filing a petition with the Secretary in the form required
15 by Section 17-103.040, 3i-1r747 F.A.C. However, reclassification
[ 56 to G-I shall follow the procedures in 6(e) below. In addition, the
17 Department, on its own initiative or at the direction of the
18 Commission, may seek any reclassification by initiating rulemaking
19 pursuant to Section 17-102.010, -1-Te967 F.A.C.
20 (5)(b) through (d) No change.
21 (6) In addition to the procedures in subsection (5) above,
22 the following procedure shall be used to designate Class G-I
23 sngie-seoee aquifers:
24 (a) Rulemaking procedures pursuant to Chapter 17-102,
25 F9-.T F.A.C., shall be followed;
26 (b) Ab-eeast-ene FEact-finding workshops shall be held in
27 the affected area;
28 (c) All local, county or municipal governments, water
19 management districts, and state legislators, regional water supply
30 authorities, and regional planning councils whose districts or
31 jurisdictions include all or part of a proposed G-I single-soree
L.i7
1 aquifer shall be notified in writing by the Department Seerefary
2 at least 60 days prior to the workshop;
3 (d) A prominent public notice shall be placed in an
4 appropriate a newspapers )-or-nfewspapers-i--a--eare-rea-i-s
5 prepesed-fer-designatieon of general circulation in the area of
6 the proposed G-I single-seeree aquifer at least 60 days prior
7 to the workshop. The notice shall contain a geographic location
8 map indicating the area of the proposed zones of protection and a
9 general description of the impact of reclassification on present
10 and future discharges to ground water. A notice of a G-I workshop
11 shall be published in the Florida Administrative Weekly prior to
12 the workshopss;
13 (e) The Commission may reclassify an aquifer or aquifer
14 segment as a G-I aquifer within specified boundaries upon
15 consideration of environmental, technological, water quality,
O"SN institutional (including local land use comprehensive plans),
17 public health, public interest, social and economic factors. When
18 considering a reclassification an aquifer or aquifer segment
19 shall:
20 1. Meet at least one of the criteria listed in Section
21 17-3.403(7), F.A.C. below to be eligible as a Class G-I aquifer,
22 and
23 2. Be specifically mapped and delineated by the Department
24 on a detailed map of a scale which would clearly depict the
25 applicable zones of protection. Maps will be grouped and
26 submitted for reclassification generally on a regional basis.
27 a. Mapping priorities shall follow the Commission directive
28 of February 27, 1985.
S) b. The remaining areas of the state will be mapped by the
30 Department as time and resources allow.
31 +et-- he-eemmiassen-may-reelassify-an-atfeie-er-pertto
vf. /`
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a well pursuant to Rule 17-21, F.A.C., or a change of 25 percent
in the permitted average daily pumping rate. Such changes in the
zones of protection shall follow the rulemaking requirements as
described in (5)(a) through (6)(e) above. Zones of protection may
be established for newly approved/permitted well(s) or
wellfields(s), after the entire state has been mapped, by
following the rulemaking procedures described in (5)(a) through
(6)(e) above, except that new well(s) or wellfield(s) shall not
cause certain planned facilities to become subject to G-I
requirements or prohibitions. For the purpose of paragraph (f), a
planned facility shall be limited to:
1. The site of an electric power generating facility
included in a 10-year site plan submitted to and classified as
suitable by the Florida Department of Community Affairs prior to
ground water reclassification to G-I, and still in effect at the
time of reclassification.
2. Any development for which a development order, pursuant
to Sections 380.06 or 380.061, F.S., has been issued prior to
ground water reclassification to G-I, and still in effect at the
time of reclassification.
L7/9 __
of-an-aqfer-as-as-a-sngle-seree-aqfer-wvthin-specified
beandartes-pen-the-affi mative-fiti dng-thaet
T--Phe-aqutfer-r-pertion-of-the-aqtfer-sa-the-enly
reasenably-available-seateee-ef-peetabe-water-te-a-snfieante
segment-ef-tehe-populateon-an
7--The-designated-ese-ts-atteanableT-spen-eensideration
ef-envireementa7-teeheoegieal7-water-qality7-*natitutionaa7
and-seeiei-aend-eeeneme-feeeafs-
(f) The Department, with approval from the Commission, may.
change the zones of protection based on reconfiguration of a
wellfield. changes in the depth of the well. nrnnar ahantnnmpnl nf
I
1 +f+--When-mak ing-tkhe-~fi~ndng-requred-by-sabparagraph
2 +e+7-the-eemmisseon-must-specfteally-eeosnder7y-pon
3 preseentaten-ef-any-eempetent-evidence-at-the-hearingy-the
4 feloewing-
5 Te--ether-seetees-ef-petable-water-whieh-eeuld-be-esed
6 and-the-eests-ef-develep-ng-these-souree9s-and
7 2r--he-leng-term-adequaey-f-he-end-wae-aq e-te
8 supply-expeeted-~ftare-demands-if-ether-seerees-are-net
9 develepedy-atd
10 3r--Petential-adverse-effeets-from-eenttneed-eoefsmpti4o
11 .ef-water-frem-the-aqatfer-if-6S--elassifieation-dees-net-eeery
12 and
13 47--Ptenetial-adverse-impaets-on-existng-and-petentis
14 diseharges-to-the-affeeted-greend-water-if-6-i-elessifeat-ien
15 eecursT
16 (7) Categories of G-I aquifers. For aquifers or aquifer
(.7 segments to be eligible for potential reclassification as G-I
18 aquifers one of the following criteria must be met:
19 (a) That the aquifer or aquifer segment under consideration
20 be within the zones of protection of a major public community
21 drinking water supply wells) or wellfield(s) withdrawing water
22 from unconfined aquifers or from leaky confined aquifers.
23 Determination of vertical travel time for leaky confinement will
24 be by application of the following formulae:
25 Vv = Kv L h/nl
26 where:
27 Vv = vertical velocity (feet/day).
28 Kv = vertical hydraulic conductivities of the surficial
aquifer and underlying confining bed materials
S9 (feet/day).
30 *h = head gradient between water table in the surficial
aquifer and the potentiometric surface of the producing
31 aquifer (feet).
./ Lo
n = effective porosities of the surficial aquifer and
underlying confining bed materials.
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producing aquifer (feet).
Tv = 1/Vv 365
where:
Tv = vertical
travel time (years).
1 = same as above.
Vv = same as above.
(b) (Consideration of the following aquifer categories for
reclassification as G-I is reserved.)
1. High recharge areas.
2. Only locally available source of drinking water to
coastal barriers.
3. Future public water supplies.
(8) Determination of the boundaries of the zones of
protection.
(a) The boundaries of the
based on radii from the wellhead
clustered, so that the five year
zones of protection shall be
or wellfield, (if closely
zones of protection are
overlapping) measured in 200 feet for the inner zone and five
years for the outer zone.
The radius of the outer zone shall be
determined using the following formula:
1/2
QT
r =-
3.14 hn
where Q = permitted average daily flow from the well (measured in
cubic feet per day); T = five years (1825 days); 3.14 =
mathematical constant pi; r = radius (feet); h = distance from the
top of the producing aquifer to the bottom of the hole (feet); n =
effective porosity.
For the purpose of this calculation the
following effective porosities for representative Florida aquifers
q. a 71
1 = distance from the water table to the top of the
1 = distance from the water table to the top of the
m
I i i m
I
ovranic mauedi 00fe frte ne zn ndfv
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protrudes beyond the caiculat peximetrori hei tbh.
configuration of the well is irregular, the perimeter will be
shaped to accommodate the configuration. The surface area
encircling the perimeter of the wellfield shall not exceed the
total surface area of the overlapping zones of protection for
individual wells.
In the case of unclustered wells within a wellfield
individual zones of protection around each well will be
calculated.
(b) Affected parties wanting to change the Department's
determination of the five year zone of protection may do so during
the rulemaking for reclassification to G-I by generating more
precise site-specific data concerning porosity, appropriate
thickness of the aquifer, length of the borehole, or average
permitted daily flow from the well or wells that would demonstrate
more accurate calculations of the zone. Further, affected parties
;fZ
will be used:
Floridan .05 Sand and Gravel .2
Biscayne .15 Surficial .2
The Department shall use more site-specific values for "Q", "n",
or "h" when available for designation of the zones of protection
by the Commission.
For wellfields whose individual zones of protection overlap
due to clustering, a single zone of protection will be calculated
in the following manner:
Using the permitted average daily withdrawal rate of the
wells with overlapping zones of protection, the area on the
surface overlying the aquifer equal to the sum of the areas of the
five year zones of protection of the individual wells, shall be
used to define the area which encircles the perimeter of the
wellfield. In cases where a zone of protection of a single well
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may also provide site-specific data at the well related to
recharge or vertical travel time which demonstrate more accurate
calculations of the zone. Sinkholes, or other hydrogeological
features that allow accelerated movement of contaminants to the
ground water will be considered for determination of the
appropriateness of recalculating the zone. An affected party
shall notify the Department, in writing, as soon as possible after
receiving information or notice relating to the specific G-I area,
of its intent to provide supporting technical data for an
alternative zone of protection. An affected party shall provide
the supporting technical information to the Department for
consideration no later than 90 days before the public hearing
before the Commission.
(c) Exemptions for installations discharging into Class G-I
ground water. This exemption procedure is in addition to an
exemption under Section 17-4.243(2), F.A.C.
1. The Secretary may, upon receipt of a petition for
exemption from a permit applicant and after public notice in the
Florida Administrative Weekly, and after opportunity for a Section
120.57, F.S., administrative hearing pursuant to Chapter 120,
Florida Statutes, issue an Order specifically exempting an
installation discharging, designed to discharge, or likely to
discharge within a Class G-I five year zone of protection, from
the criteria for that kind of installation as stated in Section
17-4.245(3), F.A.C., upon affirmative demonstration by the
petitioner of the following:
a. The exemption is based on more precise site-specific
information specific to a five year zone of protection to be
provided by the petitioner relating to porosity, appropriate
thickness of the aquifer, length of the borehole, vertical travel
time, recharge, or the average permitted daily flow from the well
S./?s
1 or wells which would demonstrate the inapplicability of that zone
2 for the installation under consideration. Sinkholes, or other
3 hydrogeological features that allow accelerated movement of
( c contaminants to the ground water will be considered for
5 applicability of the zone.
6 b. The Department reserves the right to revoke an
7 exemption based on one or more changes to applicable components of
8 a. above or other relevant information that would no longer result
9 in an affirmative demonstration to allow the continuation of said
10 exemption. Such revocation shall follow the public notice
11 procedures for variances as described in Section 17-103.100(4),
12 F.A.C.
13 Specific Authority: 403.061, 403.062, 403.087, 403.504, 403.704,
14 403.804, F.S. Law Implemented: 403.021, 403.061, 403.087,
15 403.088, 403.141, 403.161, 403.182, 403.502, 403.504, 403.702,
%
16 403,708, F.S. History: Formerly 28-5.06, 17-3.06, 17-3.081,
Amended and Renumbered 1-1-83, Amended
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