Current through Register Vol. 48, No. 38, September 20, 2024
Upon request from the Agency, an applicant for a construction
permit must submit an Engineer's Report. Types of construction projects for
which the Agency may request an Engineer's Report include the construction of a
new community water supply, a new source location, or a new water treatment
process other than chemical feeding only. The Engineer's Report may be
submitted as a preliminary plan under Section
602.205. An Engineer's Report
submitted under this Section must contain the information specified by this
Section.
a) General information,
including:
1) a description of the existing
community water supply;
2) a
description of the sewerage facilities;
3) a description of the municipality or area
to be served; and
4) the name and
mailing address of the owner or official custodian of the community water
supply.
b) The extent of
the community water supply system, including:
1) a map of the area to be served with water
and any provisions for extending the community water supply system;
2) maps of additional areas to be served and
an appraisal of the future requirements for service; and
3) present and prospective industrial and
commercial water supply needs that are likely to be required in the near
future.
c) Water
consumption data, including:
1) population
trends, as indicated by available records;
2) an estimate of the number of consumers,
based on population trends, who will be served by the proposed or expanded
water supply system 20 years in the future;
3) present and future water consumption
values used as the basis of design;
4) present and estimated future yield of the
water sources for a community water supply; and
5) estimated water loss in the distribution
system based on available records.
d) A justification for the project when two
or more solutions exist for providing community water supply facilities, as
directed under the Illinois Drinking Water Revolving Loan Funding Process (35
Ill. Adm. Code 662), each of which is feasible and practicable. The Engineer's
Report must discuss the alternatives and provide reasons for selecting the one
recommended, including financial considerations, operational requirements,
operator qualifications, reliability, and water quality
considerations.
e) Sources of Water
Supply. The Engineer's Report must describe the proposed source or sources of
water supply to be developed and the reasons for their selection, and provide
information as follows:
1) For surface water
sources:
A) hydrological data, stream flow,
and weather records;
B) safe yield,
including all factors that may affect it;
C) documentation of the structural safety of
any spillway or dam to assure that spillway or dam can continue to provide a
source of water during extreme weather;
D) description of the watershed, noting any
existing or potential sources of contamination (such as highways, railroads,
chemical facilities, and land/water use activities) that may affect water
quality;
E) summarized quality of
the raw water, with special reference to fluctuations in quality and changing
meteorological conditions; and
F)
source water protection issues or measures, including erosion and siltation
control structures, that need to be considered or implemented.
2) For groundwater sources:
A) the sites considered;
B) advantages of the site selected;
C) the elevations above mean sea level of the
site selected;
D) the probable
character of geologic formations through which the source is to be
developed;
E) hydrogeologic
conditions affecting the site, such as anticipated interference between
proposed and existing wells;
F)
sources of possible contamination, such as sewers and sewage treatment/disposal
facilities, highways, railroads, landfills, outcroppings of consolidated
water-bearing formations, chemical facilities, waste disposal wells, and
agricultural uses;
G) the test well
depth and method of construction, including placement of liners or
screens;
H) test pumping rates and
their duration, including water levels and specific yield;
I) test well water quality information;
and
J) wellhead protection measures
being considered.
f) Project sites, including:
1) a discussion of the various sites
considered and the advantages of the chosen one;
2) the proximity of residences, industries,
and other establishments; and
3)
any potential sources of pollution that may influence the quality of the supply
or interfere with the effective operation of the water works system, such as
sewage absorption systems, septic tanks, privies, cesspools, sink holes,
sanitary landfills, and refuse and garbage dumps.
g) Proposed Treatment Processes. The
Engineer's Report must describe all proposed treatment processes necessary to
meet the requirements of this Chapter and provide any available supporting
data.
h) Automation. The Engineer's
Report must provide supporting data justifying automatic equipment, including
the servicing and operator training to be provided, and must provide for manual
override of any automatic controls.
i) Power. The Engineer's Report must include
the following power description:
1) the main
source of power;
2) dedicated
standby power capable of providing power to operate the community water
supply's water source, treatment plant, and distribution facilities during
power outages; and
3) outside
emergency power sources that are available.
j) Soil characteristics, groundwater
conditions, and foundation problems, including:
1) the character of the soil through which
water mains are to be laid;
2) the
foundation conditions prevailing at sites of proposed structures; and
3) the approximate elevation of groundwater
relative to mean sea level at its expected highest level in relation to
subsurface structures.
k) Flow requirements, including a hydraulic
analysis based on flow demands and pressure requirements.
BOARD NOTE: Fire flows, when fire protection is provided,
should meet the recommendations of Insurance Services Office, Inc. (also known
as "ISO" or "Verisk") or other similar agency for the service area
involved.
l) Water Plant
Wastes. When waste treatment facilities are necessary for the addition of a new
process or an increase in water treatment plant capacity, those facilities must
be included as part of the engineering plans and specifications, and the
Engineer's Report must include the following:
1) an estimate of the character and volume of
the waste that will be generated and its proposed disposition; and
2) the type of waste treatment, discharge
location, and frequency of discharge.
