Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1.
Selection.
The department shall select data elements to be used in a
wellhead protection plan in accordance with parts
4720.5310 and
4720.5340 based on the
hydrogeological setting and vulnerability of the well and the drinking water
supply management area known at both the time the scoping meeting is held and
the scoping decision notice is mailed.
Subp. 2.
Physical environment.
The department shall select data elements about the physical
environment from the areas described in items A to D.
A. Information about precipitation must
include:
(1) an existing map or list of local
precipitation gaging stations; and
(2) an existing table showing the average
monthly and annual precipitation in inches for the preceding five
years.
B. Information
about the geology of the area must include:
(1) an existing geologic map and a
description of the geology, including aquifers, confining layers, recharge
areas, discharge areas, sensitive areas as defined in Minnesota Statutes,
section
103H.005, subdivision
13, and groundwater flow characteristics;
(2) existing records of the geologic
materials penetrated by wells, borings, exploration test holes, or excavations,
including those submitted to the department;
(3) existing borehole geophysical records
from wells, borings, and exploration test holes; and
(4) existing surface geophysical
studies.
C. Information
about the soil conditions must include:
(1)
existing maps of the soils and a description of soil infiltration
characteristics; and
(2) a
description or an existing map of known eroding lands that are causing
sedimentation problems.
D. Information about water resources must
include:
(1) an existing map of the
boundaries and flow directions of major watershed units and minor watershed
units;
(2) an existing map and a
list of public waters as defined in Minnesota Statutes, section
103G.005, subdivision
15, and public drainage ditches;
(3) the shoreland classifications of the
public waters listed under subitem (2), pursuant to part
6120.3000 and Minnesota Statutes,
sections
103F.201
to
103F.221;
(4) an existing map of wetlands regulated
under chapter 8420 and Minnesota Statutes, sections
103G.221
to 103G.2373; and
(5) an existing
map showing those areas delineated as floodplain by existing local
ordinances.
Subp.
3.
Land use.
The department shall select data elements about land use from
the areas described in items A and B.
A. Information about land use must include:
(1) an existing map of parcel
boundaries;
(2) an existing map of
political boundaries;
(3) an
existing map of public land surveys including township, range, and
section;
(4) a map and an inventory
of the current and historical agricultural, residential, commercial,
industrial, recreational, and institutional land uses and potential contaminant
sources;
(5) an existing
comprehensive land-use map; and
(6)
an existing zoning map.
B. Information about public utility services
must include an existing:
(1) map of
transportation routes or corridors;
(2) map of storm sewers, sanitary sewers, and
public water supply systems;
(3)
map of the gas and oil pipelines used by gas and oil suppliers;
(4) map or list of public drainage systems;
and
(5) record of the construction,
maintenance, and use of the public water supply well and other wells within the
drinking water supply management area.
Subp. 4.
Water quantity.
The department shall select data elements about water
quantity from the areas described in items A and B.
A. Information about surface water quantity
must include an existing:
(1) description of
high, mean, and low flows on streams;
(2) list of lakes where the state has
established ordinary high water marks;
(3) list of permitted withdrawals from lakes
and streams, including source, use, and amounts withdrawn;
(4) list of lakes and streams for which state
protected levels or flows have been established; and
(5) description of known water-use conflicts,
including those caused by groundwater pumping.
B. Information about groundwater quantity
must include an existing:
(1) list of wells
covered by state appropriation permits, including amounts of water
appropriated, type of use, and aquifer source;
(2) description of known well interference
problems and water use conflicts; and
(3) list of state environmental bore holes,
including unique well number, aquifer measured, years of record, and average
monthly levels.
Subp.
5.
Water quality.
The department shall select data elements about water quality
from the areas described in items A and B.
A. Information about surface water quality
must include an existing:
(1) map or list of
the state water quality management classification for each stream and lake;
and
(2) summary of lake and stream
water quality monitoring data, including:
(a)
bacteriological contamination indicators;
(b) inorganic chemicals;
(c) organic chemicals;
(d) sedimentation;
(e) dissolved oxygen; and
(f) excessive growth or deficiency of aquatic
plants.
B.
Information about groundwater quality must include an existing:
(1) summary of water quality data, including:
(a) bacteriological contamination
indicators;
(b) inorganic
chemicals; and
(c) organic
chemicals;
(2) list of
water chemistry and isotopic data from wells, springs, or other groundwater
sampling points;
(3) report of
groundwater tracer studies;
(4)
site study and well water analysis of known areas of groundwater
contamination;
(5) property audit
identifying contamination; and
(6)
report to the Minnesota Department of Agriculture and the Minnesota Pollution
Control Agency of contaminant spills and releases.