All maps, plats and sketch plats required to
be submitted by this chapter shall conform to one of the following
size configurations: 8 1/2 inches by 13 inches; 15 inches by
21 inches; 24 inches by 36 inches; or 30 inches by 42 inches.
[Amended by Ord. No. 1-1987; Ord. No. 18-1987; Ord. No. 14-1990; Ord. No. 16-2000; Ord. No. 2001-32]
All plats shall be based on accurate information
at a scale of not less than one inch equals 100 feet and shall show
or include the following information, except that the Planning Board
may waive any requirement or request additional information where
it is clearly appropriate to the particular application:
A. Location and key map. The entire tract to be subdivided,
giving the accurate location of all existing and proposed property
and street lines, and including a key map at a scale where one inch
equals not less than 1,000 feet showing the entire subdivision and
its relation to all features shown on the Official Map and Master
Plan and located within 1/2 mile of the extreme limits of the subdivision,
and the zoning classification of the proposed subdivision and of adjacent
land.
B. Structures, wooded areas and topography. The location
of existing houses, buildings and other structures, with accurate
dimensions from all existing and proposed lot lines, wooded areas
and isolated trees more than 10 inches in diameter and topography
within the portion to be subdivided and within 200 feet thereof at
ten-foot contours.
C. Owners. The name of the owner, all adjoining property
owners and those across existing or proposed streets as disclosed
by the most recent municipal tax records.
D. Identity. The tax map sheet, date of revision, block
and lot numbers and zone district.
E. Streets, easements, watercourses, rights-of-way. The
location of existing or proposed streets, roads, easements, public
rights-of-way, streams, bridges, culverts, drainage ditches and natural
watercourses in and within 200 feet of the subdivision. Floodplains,
ponds and wetlands shall be shown in the subdivision and within 200
feet of the subdivision.
F. Lots. Lot layout, lot dimensions, all required setback
lines, and individual lot areas in square feet and acreage. The applicant
shall contact the Tax Assessor for the proper block and lot numbers
for new lots to be subdivided, which numbers are to be clearly designated
on the plat.
G. Percolation test and soil logs. The location of all
percolation tests including those that failed and soil logs conducted
at the expense of the applicant and approved by the Board of Health
shall be shown on the plan. At least two successful percolation tests
for each lot shall be required, and one soil log for every lot shall
be submitted. No percolation test shall be closer than 20 feet or
further than 40 feet and additionally none of the percolation tests
shall be more than 30 feet from the soil log.
H. Subsection
G above of this section shall take effect January 1, 1987, with the exception that a single percolation test approved by the Health Officer, prior to December 31, 1986, shall satisfy the requirement for two tests, set forth in Subsection
G above.
I. Other information.
(1) Date of original preparation and date of revision,
if any, of plat, as well as old name as submitted previously under
different title.
(2) Where, in the opinion of the Planning Board, a proposed
subdivision could adversely affect the development of the remainder
of the tract or adjacent properties or possibly require improvements,
the Planning Board may require the applicant to submit a sketch plat
for the remainder of the tract in sufficient detail and accuracy to
permit the Board to determine that the minor can be properly developed
and accommodated within the overall tract design.
(3) Any other information required by the Planning Board.
J. Information required for minor subdivision plats. If the sketch plat is being submitted for minor subdivision approval, it shall contain the information required under this §
330-26 and shall be a certified survey map drawn by a licensed New Jersey land surveyor. The plat shall provide for endorsement by the Chairman and Planning Board Secretary. If the plat is to be filed in accordance with §
330-22D, it shall meet the requirements of the Map Filing Act.
K. The deeds submitted with minor subdivision plats shall contain the right to farm recital contained in §
400-14E, and the final plats shall contain a provision requiring each deed issued and executed to describe and convey any of the lots shown on the final plat to contain the right to farm recital set forth in §
400-14E.
L. An environmental inventory plan in accordance with §
330-30.
M. A hydrogeologic report in accordance with §
330-31.
[Amended by Ord. No. 14-1990; Ord. No. 16-2000; Ord. No. 2001-32]
The preliminary plat shall be clearly and legibly drawn or reproduced at a scale of not more than one inch equals 100 feet. Preliminary plats shall be drawn by a licensed New Jersey professional engineer or land surveyor. Contour maps and preliminary construction plans including road profiles and utility plans shall be submitted as part of the preliminary plat. Separate maps may be required by the Board for topography, utilities, and road details. A soil erosion and sedimentation control plan and a grading plan shall be included. The plat shall be designed in compliance with the provisions of Article
VIII of this chapter and shall show or be accompanied by the following information:
A. Location and key map. The entire tract to be subdivided,
giving the accurate location of all existing and proposed property
and street lines, and including a key map at a scale where one inch
equals not less than 1,000 feet showing the entire subdivision and
its relation to all features shown on the Official Map and Master
Plan and located within 1/2 mile of the extreme limits of the subdivision,
and the zoning classification of the proposed subdivision and of adjacent
land.
B. Lots. Lot layout, lot dimensions, all required setback
lines, and individual lot areas in square feet and acreage. Lots shall
be designated by consecutive numbers until given an official lot number
designation by the Township.
C. Other contents. The tract name, tax map sheet and
date or revision, block and lot numbers, date of plat preparation,
reference meridian, scale, graphic scale and the following names and
addresses:
(1) Record owner or owners or property to be subdivided;
if other than an individual, the corporate officers or partners or
other statutory agent.
(3) Person who prepared map, official seal and license
numbers.
(4) Owners of property within 200 feet of entire tract
being subdivided.
D. Acreage. Acreage of tract to be subdivided to nearest
1/100 of an acre.
E. Elevations; contours. Sufficient elevations and contours
at five-foot vertical intervals for slopes averaging 10% or greater
and at two-foot vertical intervals for land of lesser slope to determine
the general slope and natural drainage of the land and the high and
low points for a distance of 200 feet around the entire tract boundary.
F. Existing and proposed locations. The location of existing
and proposed property lines, streets, buildings, watercourses, railroads,
bridges, culverts, drain pipes, sanitary sewers, water mains, gas
mains, power lines, and any natural features such as wooded areas,
large trees over 10 inches in diameter and rock formations. This data
shall be determined by field and/or photogrammetric survey.
G. Streets. Preliminary plans and profiles at a scale
of not more than one inch equals 50 feet horizontally and one inch
equals five feet vertically, including cross sections every 50 feet
or as specified by the Township Engineer of all proposed streets,
curbs and gutters within the subdivision and proposed connection with
existing or future continuing streets. The distance and radii of all
curves along all street lines shall be shown.
H. Utilities. Preliminary plans and profiles of proposed
utility layouts shall be at a scale of not more than one inch equals
50 feet horizontally and one inch equals five feet vertically (water,
gas, storm and sanitary sewers, telephone and electricity) showing
connections to existing or proposed utility systems.
I. Sewers, drains, ditches.
(1) Preliminary plans and profiles at a scale of one inch
equals 50 feet horizontally and one inch equals five feet vertically
of all proposed and existing sanitary sewers, storm drains, drainage
ditches, and streams within the subdivision, together with the locations,
sizes, elevations, grades and capacities of any existing sanitary
sewer, storm drain, drainage ditch or stream or watercourse to which
the proposed facility shall be connected. When brook or stream channel
improvements are proposed or required, the plans for such improvement
shall be approved by the State Department of Environmental Protection
or the Hunterdon County Planning Board where applicable.
(2) Where individual sewerage disposal systems are proposed,
a typical plan shall be submitted to the Township Health Officer.
The plan shall be of a system approved by the appropriate local or
county agency and meeting all local, county and state requirements.
J. Percolation tests and soil logs. When an individual sewage disposal system is proposed,
the following requirements shall be met:
(1) Percolation tests shall be made on each lot to determine
the ability of the soil to absorb effluent. The tests shall be made
in the approximate location where the system is to be located and
not closer to a side lot line than the minimum side yard requirement.
Such tests shall be made as directed by the Township Health Officer
or his designee. The percolation test shall be approved by the Township
Health Officer. No lot shall be approved as a building lot unless
a passing percolation test has been secured.
(2) If the percolation rate meets the Township requirements,
a disposal system designed by a professional engineer in accordance
with local, county, and state standards shall be submitted to the
Township Health Officer for his approval.
(3) In areas of questionable percolation, the administrating
officer of the Board of Health may establish the conditions under
which the percolation tests may be undertaken, including the month
of the year and location.
(4) The Planning Board may require in areas of questionable
suitability for individual sewage disposal systems soil logs to be
undertaken under the direction of the Township Health Officer.
K. Off-site improvements. When the development of the
subdivision or improvements within the subdivision are contingent
upon improvements outside the boundaries of the subdivision, information
shall be supplied by the subdivider prior to Planning Board consideration
for preliminary approval that the improvements outside the subdivision
are installed and will be available to the subdivider.
L. Setback lines. All front, rear and side yard lines
shall be shown for all lots.
M. Deed restrictions. A copy of any protective covenants
or deed restrictions applying to the land being subdivided shall be
submitted with the preliminary plat.
N. Open space. Any open spaces proposed to be dedicated
for public use or playgrounds or other public purpose and the location
and use of all such property shall be shown on the plat.
O. Support capability. When deemed necessary to determine
the suitability of the soil to support new construction, the Planning
Board shall require test holes or borings to be made by a New Jersey
licensed engineer or an approved testing laboratory at the expense
of the subdivider under the direction of the Township Engineer.
P. On-site wetland delineation.
(1) An on-site wetland delineation prepared by a qualified
consultant may be required for submission on preliminary site plans
if any of the following conditions exist on the applicant's property:
(a)
Hydric or wetland soils as identified in the
Hunterdon County Soil Survey.
(b)
Wetlands as identified on the US Fish and Wildlife
Services Wetlands Map (located in the Planning Board Clerk's office).
(c)
On-site vegetation or soil conditions which
indicate the probable presence of on-site wetlands.
(2) The Planning Board reserves the right to require an on-site wetland delineation for minor subdivisions if any of the indicators noticed under Subsections
P(1)(a) through
(c) are present on the applicant's property and may significantly impact the utility of the newly created lots.
Q. An environmental inventory plan in accordance with §
330-30.
R. A hydrogeologic report in accordance with §
330-31.
[Added by Ord. No. 12-1998]
A. Purpose. The purpose of the investigation is to provide
sufficient data to define all existing geologic conditions in limestone
areas for which appropriate site design and/or engineering solutions
may be necessary to minimize any adverse public health, safety, general
welfare or environmental impacts caused by the project.
B. Applicability. The Planning Board shall require a geologic investigation for development in the carbonate rock areas involving major subdivisions, major site plans and wastewater disposal systems requiring state permits or treatment works approvals. All applications for development shall comply with Subsection
J below.
C. Establishment of regulated areas. Portions of the
Township are underlain by limestone formations, indicated as Kittatinny
limestone on attached Exhibit A. Such areas shall be known as carbonate rock areas (CRA)
and shall be subject to the geologic investigation outlined below,
which is deemed necessary by the Planning Board to minimize any adverse
public health, safety or general welfare impacts.
D. Submission requirements in carbonate rock areas. An
applicant for a major subdivision, a major site plan, or a wastewater
disposal system requiring state permits or treatment works approvals
shall complete the Phase I Geologic Investigation Checklist attached
hereto. The geologic investigation checklist shall:
(1) Be prepared and conducted by the applicant's geological
consultant (AGC) who shall be a geologist or professional engineer
with experience in karst terrains.
(2) Identify the geologic nature of the materials underlying
the site.
(3) Be based on an on-site/area field investigation and
document review and shall include a description of the site geology;
groundwater conditions such as depth to/direction of flow and evaluation
of the potential impact of the project on groundwater quality; and
identification of any karst/solution features observed and the structural
control of same.
(4) Note karst/solution features which shall be flagged
in the field.
E. The Phase I Geologic Investigation Checklist information
shall be reviewed by the Township Geologic Consultant (TGC), and a
review report shall be submitted by the TGC to the approving authority
within 30 days of the submission by the applicant of the Phase I Investigation
Checklist. The TGC's report shall review the completeness of the Phase
I Investigation Checklist and shall recommend either that a Phase
II Investigation Plan be prepared and submitted or that portions or
all of the requirements of the Phase II investigation be waived.
F. The purpose of the Phase II Investigation Plan is
to delineate and define karst features noted or suspected in the Phase
I Geologic Investigation Checklist, to evaluate the effects of the
same on the proposed development and to propose methods of remediation
if needed. The Phase II Investigation Plan shall include a narrative
describing the types of features to be investigated, their locations,
the types of direct/indirect methods to be used and the reasons for
their use. Direct methods shall include site reconnaissance, test
pits, test probes, test borings or other appropriate methods. Indirect
methods shall include aerial photography and geophysical procedures.
A site plan indicating the areas of investigation, proposed locations
of testing and types of testing shall accompany the Phase II Investigation
Plan.
G. The Phase II Investigation Plan shall be reviewed
by the TGC, and a review report shall be submitted by the TGC. The
TGC's report shall include a specification of the nature and extent
of the Phase II investigation, the results of which shall be in the
Geotechnical Evaluation Report.
H. At the completion of the Phase II investigation, a
formal Geotechnical Evaluation Report shall be submitted which shall
include the following information gathered during the testing protocol:
(1) Logs of all borings, test pits and probes, including
evidence of cavities, loss of drilling fluid circulation during drilling,
voids encountered and similar cavities.
(2) The type of drilling or excavation technique employed.
(3) Drawings of monitoring or observation wells as installed.
(4) The time and dates of exploration tests.
(5) Reports of chemical analyses of on-site surface and
ground water in cases of potential impact as determined by the TGC.
(6) The names and qualifications of individuals conducting
the tests.
(7) The analytical methods used on soils, water samples
and rock samples.
(8) A one-inch equals 100 feet scale topographic map of
the site (at a contour interval of two feet) locating all test pits,
borings, wells, seismic or electromagnetic conductivity or other geophysical
surveys and analysis of the groundwater, including any potentiometric
maps constructed from site data or aquifer tests with rate and direction
of flow, if required by the approved Phase II Investigation Plan.
(9) A geologic interpretation of the observed subsurface
conditions, including soil and rock type, geologic unit, jointing
(size and spacing), faulting, voids, fracturing, grain size and sinkhole
formation.
(10)
An evaluation of the geotechnical findings at
the site gathered during the Phase II investigation, in relation to
the proposed development, and recommendations for the planning, engineering
design and construction techniques to be utilized in accomplishing
the project. All design recommendations shall minimize, to the greatest
extent practical, impacts upon water quality and structural hazards
associated with limestone formations. The engineering solutions proposed
to minimize environmental and structural impacts for the useful life
of the project, as well as during construction, must be clearly detailed.
(11)
Any other information required by the approved
Phase II Investigation Plan.
I. The Geotechnical Report shall be reviewed by the TGC,
and a review report shall be submitted by the TGC to the approving
authority. The TGC's report shall review the completeness of the Geotechnical
Evaluation Report, and shall advise the approving authority whether
the applicant is proposing suitable site specific design and construction
details and specifications to ensure that the proposed development
of the tract will be properly implemented and will not adversely impact
on the health, safety and welfare of the community.
J. All applications for development in carbonate rock
areas shall include the following wording on the subdivision plat
and in deeds:
"Block __________ Lot __________ is underlain
by limestone formations. Limestone formations are susceptible to surface
collapse (or sinkholes) and subsidence caused by the physical erosion
and chemical alteration of the soil and bedrock. In limestone areas
the alteration and development of land may be hazardous with respect
to the foundation safety of structures, the creation of unstable land
as a result of changes in drainage and grading and the contamination
of ground and surface waters. The exact kinds of sinkholes and/or
subsidence is not always predictable. Despite any geologic investigation
or geotechnical evaluation which may have been required in connection
with the approval of this subdivision, there is no warranty, finding,
guarantee or assurance that a sinkhole and/or subsidence will not
occur on the property in this subdivision. The municipality, its agents,
consultants and employees assume no liability for any damages which
may result from sinkhole activity. All persons should always make
independent investigations of these matters prior to using this land
for construction of a building or structure or any activity which
alters the soil and bedrock materials."
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A declaration of covenants and restrictions
in a form satisfactory to the Planning Board Attorney shall be filed
in the office of the County Clerk simultaneous with the filing of
the final plat specifying which lots are so affected and containing
similar language.
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[Added by Ord. No. 16-2000; amended by Ord. No. 2003-11]
A. Purpose. The purpose of the environmental inventory
plan is to provide the Planning Board with sufficient information
concerning the natural resources of a tract so that the Board can
make an informed decision concerning the potential environmental impact
of the proposed development.
B. Applicability. An environmental inventory plan shall be required with each application for a minor subdivision (§§
330-22 and
330-26), preliminary major subdivision (§§
330-23 and
330-27), site plan (§§
400-25 and
400-30) or variance.
C. Submission requirements.
(1) An applicant for a minor subdivision, major subdivision, site plan or variance shall provide the following information in mapped form as part of the submitted plat or plan. The scale of the map shall be one inch equals 100 feet at a minimum. The categories of mapped information provided below may be shown on one sheet, provided that the Board determines there is enough detail and clarity for the information to be readable, or may be shown on additional sheets. The environmental inventory plan shall include the limits of the proposed development, in the case of a site plan, or the proposed lot lines, in the case of a subdivision, so that the Board can assess the impact of the proposed development on the natural resource characteristics of the site. The environmental inventory plan shall identify the following features on-site and, in the case of Subsections
C(1)(b),
(e) and
(h) below, within 200 feet of the property:
(a)
Soils classifications in accordance with the
Hunterdon County Soils Survey. In tabular form on the map, the applicant
shall provide the depth to the seasonal high water table and the depth
to bedrock for each of the soil phases shown on the map.
(b)
Geology, in accordance with the latest geological
mapping from the United States Geological Survey (USGS).
(c)
Flood hazard areas, in accordance with the National
Flood Insurance Program mapping prepared by the Federal Emergency
Management Administration (FEMA) and New Jersey's Flood Hazard Area
Control Act and the Flood Area Hazard regulations.
(d)
Wetlands on the tract and within 150 feet of
the tract shall be delineated by a qualified expert in accordance
with the standards of the NJDEP (N.J.A.C. 7:7A-2.5). The wetlands
shall be surveyed and located on the plan by the applicant's land
surveyor. The wetlands delineation shall include anticipated transition
areas (buffers). The qualified wetlands expert shall submit a written
report on the wetlands delineation, classification of wetlands and
transition area widths. The applicant may provide a letter of interpretation
from the NJDEP to support the required delineation referenced herein.
(e)
Streams, water bodies and ditches. The plan
shall identify whether the stream is perennial or intermittent in
accordance with the classifications in the Hunterdon County Soil Survey.
The plan shall also identify the NJDEP classification of the stream,
i.e., trout production, trout maintenance or non-trout, if such a
classification is applicable to the identified water body; and, in
the case of ditches or intermittent streams, the classification of
the receiving stream.
(f)
Topography and slopes, with slope classes of 0% to 15%, 15% to 25% and greater than 25% delineated on the plans. (See §
400-8E, Steep slope regulations, for additional standards.)
(g)
Tree groupings, including a description of general
size and species composition. Individual trees greater than 10 inches
diameter at breast height shall be identified.
(h)
Identification of threatened and endangered
plants and animals, as identified by the NJDEP Natural Heritage Program
or other sources. If the source is the Natural Heritage Program, the
applicant shall provide the letter/report supplied by the program.
(i)
Historic and cultural resources occurring on
the property, as defined by the Township or Hunterdon County.
(j)
Stone rows, bridges, entrance gates to the property,
driftways and dams.
(2) If any of the above items indicate that there are
conditions which may affect the proposed development, the Board reserves
the right to have the applicant address specific impacts of the proposed
development, such as those relating to water quality, stormwater management,
noise, air quality, and the loss of forest and habitat.
D. Reports and written documentation. The applicant shall
provide the written reports concerning wetlands and threatened and
endangered species referenced above. In addition, the Board may require
the applicant to provide additional explanatory information or reports
that would assist the Board in evaluating the information provided
on the environmental inventory plan. Such written reports may include
an assessment of the probable impact of the development on the resources
depicted on the environmental inventory plan; an evaluation of any
adverse environmental impacts that cannot be avoided; and a description
of steps to be taken to avoid or minimize adverse environmental impacts
during construction and operation, including necessary maps, schedules
and other explanatory data to clarify and explain these steps.
[Added by Ord. No. 2001-32]
A. Purpose and applicability.
(1) It is the intent of the requirements of this section that an aquifer test and analysis as set forth in Subsection
C(1) be provided as part of a preliminary plat application of a major subdivision which subdivision is to be served by on-site wells. It is the intent that an aquifer test and analysis as set forth in Subsection
C(2) be conducted for major subdivision of five or fewer lots. It is the intent that an aquifer test and analysis as set forth in Subsection
C(3) be conducted as part of a submission of a nonresidential use preliminary site plan when the development proposed by such site plan is to be served by one or more on-site wells with an average daily water demand of 600 gallons or more.
(2) The deepening or replacement of a well that has the primary purpose of providing drinking water to a residence is exempt from the requirements of this section. A nonresidential use preliminary site plan when the development proposed by such site plan is to be served by one well with an average daily water demand of less than 600 gallons shall also be exempt from the requirements of this section. However, the installation of a second well with the primary purpose of irrigation, filling of swimming pools, or any other purpose other than to serve as the sole source of drinking water for a residence or nonresidential site plan with an average daily water demand less than 600 gallons must satisfy the requirements of Subsection
C, regardless of the second well's average daily water demand. A well installed for irrigation, filling of swimming pools, or any purpose other than providing the sole source of drinking water is considered to serve a nonresidential use.
B. Waiver. If an applicant can show that given the expected
average daily demand and distance to other nearby wells, the subdivision
will not induce drawdown in any existing or future wells adjacent
to the subdivision boundaries or any existing or future wells within
the subdivision, then the applicant can request a waiver from the
Planning Board for all or some of the requirements of this section.
C. Aquifer test and analysis. The testing procedures
for a major subdivision shall be based on a hydrogeologic analysis
and a minimum of one aquifer test. The hydrogeologic analysis shall
include the review of available information, including but not limited
to published maps and reports depicting Lebanon Township and surrounding
municipalities, stereo pairs of aerial photographs, New Jersey Geological
Survey (NJGS) Special Report No. 24, and M2 Associates' report "Evaluation of Groundwater Resources of Lebanon
Township, Hunterdon County, New Jersey." In addition, the hydrogeologic
analysis will include the design and conductance of aquifer test(s).
The data collection shall be designed and evaluated by a qualified
hydrogeologist. A geological and hydrogeologic report containing appropriate
maps, well logs, pump test data and monitoring well data and complying
with the requirements of this section shall be prepared and submitted.
Prior to conducting any aquifer test, a preliminary hydrogeologic
evaluation and the design of the aquifer test(s) shall be submitted
for review by the Township. The aquifer test shall consist of at least
one pumping test conducted at a sufficient rate and duration to be
able to determine aquifer characteristics such as transmissivity and
storage coefficient. As part of the aquifer test, observation wells
are to be monitored to determine and evaluate the cone of depression,
confirm aquifer parameters, and predict the effect of long-term pumping
on existing and future wells.
(1) Aquifer test and analysis for major subdivisions.
(a)
Aquifer test.
[1]
The rate and duration of the aquifer test will
depend upon the size of the proposed subdivision and expected average
and peak daily demands for all wells. The aquifer test shall be conducted
at a location most representative of site geologic conditions. For
residential subdivisions, biasing of testing toward areas of increased
fracture density may result in the Township requiring additional testing
in areas of lower fracture density to ensure that adequate yield is
available throughout the proposed subdivision.
[2]
If the proposed site is underlain by two or
more geologic zones (Precambrian Metamorphic and Igneous Zone and
the Cambrian-Ordovician Limestone/Dolomite Zone as defined in the
"Evaluation of Groundwater Resources of Lebanon Township, Hunterdon
County, New Jersey"), then an aquifer test will be required for each
zone. The test requirements for each zone will depend on the number
of lots and size of units per zone.
[3]
In the event that the preliminary hydrogeologic
evaluation indicates that a surface water and/or groundwater divide
separates the subdivision, an aquifer test will be required for each
side of the divide.
[4]
The average daily and average yearly water demand
for the subdivision must be determined according to the guidelines
in N.J.A.C. 7:10-12.7. The peak day demand is twice the average daily
demand.
[5]
To ensure that the pumping test adequately stresses
the aquifer, the length of the pumping test will be equal to the greater
of the following: a) the volume of water removed from the aquifer
is equal to the number of dwelling units multiplied by the peak day
demand (e.g., 10 four-bedroom dwelling units times a peak day demand
of 1,600 gallons per unit equals 16,000 gallons); or b) eight hours.
At a minimum, the pumping rate for the test should be equivalent to
120% of the expected long-term rate (e.g., if the expected rate for
a dwelling is five gallons per minute, then the minimum rate for the
test is six gallons per minute).
[6]
For nonresidential use, demand should be determined
based on N.J.A.C. 7:10-12.6. If the demand exceeds 100,000 gallons
per day, a New Jersey water allocation permit must be obtained from
the New Jersey Department of Environmental Protection. For demands
less than 100,000 gallons per day, the length of the pumping test
will equal the greater of the following: a) the volume of water removed
from the aquifer is equal to the peak demand; or b) eight hours. The
peak demand should be assumed equal to twice the average daily demand.
At a minimum, the pumping rate for the test should equal 120% of the
expected long-term rate.
[7]
For mixed developments containing both residential and nonresidential properties, the residential portion will be tested as described above for residential developments. Each proposed well for the commercial portions will be tested as described in Subsection
C(3) for nonresidential use. In addition, wells installed for the residential portion should be used as observation wells for the nonresidential testing and wells installed for nonresidential use should be used as observation wells for the residential testing.
[8]
The number of observation wells required per
aquifer test will depend on the number of dwelling units and/or commercial
units for the subdivision. New and existing monitoring wells may be
located such that they can be used as future water-supply wells but
they shall be located in such a manner that will yield the most accurate
information concerning the aquifer. Observation wells should be located
parallel and perpendicular to strike of the primary fractures intersected
by the tested well.
[9]
All wells must be located in accordance with
the minimum distances required by N.J.A.C. 7:10-12.12. For nonresidential
developments with an expected average daily demand less than 2,000
gallons per day, one observation well is required. This well should
be within 500 feet of the pumping well. For all other nonresidential
developments, two or more observation wells are required. At a minimum,
one of these observation wells should be within 200 feet of the pumping
well. A second observation well must be within 200 feet and 500 feet
of the pumping well. These two wells should be located along strike
of the major water-bearing fractures intersected by the pumping well.
If additional observation wells are necessary, these wells should
be located parallel to secondary and tertiary fracture sets.
[10]
A fracture trace analysis showing the location
and orientation of fractures beneath the site must be included with
the pumping test plan. This same analysis with additional information
regarding septic system locations must be included in the final report.
[11]
Major subdivisions of five lots or less to be used for single-family dwelling purposes shall conduct a pumping test on each well as outlined in Subsection
C(2). All the wells in a major subdivision of five lots or less shall be installed and used as observation wells as each individual well test is conducted. For major subdivisions of six or more lots to be used for single-family homes, the recommended number of observation wells shall be as shown in Table 1.
Table 1: Number of Observation Wells Required
for Residential Subdivisions
|
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Number of Proposed Lots
|
Number of Observation Wells
|
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5 or less
|
1 adjacent well
|
6 to 25
|
3 (minimum of 2 new wells within proposed subdivision)
|
25 to 49
|
6 (minimum of 4 new wells within proposed subdivision)
|
50 or more
|
Test proposal submitted to Board and NJDEP for
review and approval
|
[12]
The observation wells and test well must have
a geologic log describing the depth and types of soils and rocks encountered
and the depth and yields of all water-bearing fracture zones. Furthermore,
the logs should include static water level measurements and total
yield estimates for each well. The observation wells should be completed
to a similar depth as the test well. At least one of the observation
wells should be within 200 feet of the test well and at least one
observation well must be located along the preferential fracture direction
between 200 feet and 500 feet of the pumping well. Additional observation
wells should be located to evaluate potential secondary fractures
and impacts to adjacent properties.
[13]
The design of the aquifer test shall be developed
using the applicable guidance from "Guidelines for Preparing Hydrogeologic
Reports for Water Allocation Permit Application with an appendix on
Aquifer — Test Analysis Procedures" NJGS GSR 29, 1992. The aquifer
test shall be conducted according to the following procedure:
[a] Owners of existing wells on lots
located within 500 feet of the subdivision boundary shall be given
an opportunity to have their wells monitored during the aquifer test.
Such opportunity shall be given by the applicant by notice via certified
mail and shall give the time and place of the well pumping test. Furthermore,
the notice shall indicate that such existing well may be monitored
if agreed to by the well owner, provided the well is readily accessible.
Such notice shall indicate that the existing well owner must respond
within seven days and the applicant's responsibility is to monitor
up to three wells on properties within 500 feet of the subdivision
boundaries. If the owner of the lot within 500 feet of the subdivision
boundaries decides to participate by agreeing to have their existing
well monitored, they shall notify the applicant by certified mail.
Such response shall be provided within seven days of receipt of the
certified notice from the applicant. If the applicant receives no
response within the time provided, the response shall be deemed to
be negative.
[b] If the owner of a lot within 500
feet of the subdivision boundaries is to have his existing well monitored,
the applicant shall bear full responsibility for protection of the
well against contamination and shall return the well to its premonitoring
condition to the satisfaction of the lot owner.
[c] In the case when more than three
property owners within 500 feet of the subdivision boundaries decide
to participate and to have their existing wells monitored, only three
nearest to the test well need be monitored. However, if any of the
property owners requesting monitoring have wells completed to a depth
less than 100 feet, these wells must also be monitored in addition
to the three nearest wells.
[d] Prior to conducting an aquifer
test, the applicant shall submit the design of such aquifer test including
the location of wells to be monitored on adjacent lots and qualifications
of the persons and firm who will be performing the test for review
by the Township. The applicant shall submit an escrow fee of $500
along with the design of the aquifer test. The purpose of the escrow
fee is to cover the cost of Township review of the proposed aquifer
test. Such review may include submission of such design to a qualified
hydrogeologist representing the Township for review and recommendations.
[e] The pumping test will be comprised
of three phases. The first phase will involve the collection of background
water levels prior to the start of the test. The second phase will
involve the pumping of water from the well and the monitoring of water-level
drawdown in the observation and pumping wells. The third phase will
involve the recovery of water levels in the observation and pumping
wells after the pump has been shut down. This third phase of the test
should, at a minimum, be the same length as the pumping phase.
[f] If at all possible, the pumping
test (all three phases) should not be conducted during precipitation
events. If precipitation occurs during the test, the applicant should
provide precipitation amounts and sufficient data to show that the
precipitation did not recharge the aquifer during the test and adversely
impact the testing results.
[g] The background phase includes allowing
the test well and observation wells to stabilize for a minimum of
three days before the test. At a minimum, water levels should be collected
from the test well and observation wells 24 hours and one hour prior
to the start of pumping. It is the applicant's responsibility to collect
sufficient data to determine background conditions and to ensure that
antecedent influences can be fully characterized. Barometer measurements
and additional water-level measurements can be made by the applicant
to evaluate the change in water levels resulting from barometric pressure
changes and/or influences from off-site pumping.
[h] On the day of the pumping phase,
water levels shall be collected from all wells. For those wells showing
a change of more than 0.1 foot, a second round of measurements shall
be collected before starting the test. Additional rounds of measurements
may be necessary to determine that the well is in equilibrium. However,
if the applicant has barometric pressure and water-level data to indicate
that the change in static levels is due to changes in barometric pressure,
the applicant can submit these data in lieu of delaying the pumping
test.
[i] The pump and discharge pipe shall
be equipped with an orifice/manometer apparatus and calibrated flow
meter to instantaneously measure flow rate and determine total volume
pumped from the well. The discharge shall be directed so that it leaves
the site without infiltrating to the aquifer. Any and all permits
required by the NJDEP for the discharge of water must be obtained
prior to starting the test.
[j] When the pump is started the flow
rate shall be adjusted immediately to a uniform pumping rate as required
for a constant rate test and in accordance with the approved pumping
test plan. The flow rate should not vary more than 10% throughout
the test. If the flow rate fluctuates more than 10%, the test may
be deemed invalid and the applicant required to repeat the notification
and testing process. At a minimum, the flow rate for the test should
be equal to 120% of the flow rate required to satisfy the average
daily demand.
[k] Water-level measurements during
the pumping phase of the test shall be collected in accordance with
Table 2. This same schedule shall be followed for the recovery phase
of testing upon shut down of the pump in the test well.
Table 2: Frequency of Water-Level Measurements
in Wells During and After Aquifer Testing
|
---|
Time Since Pumping Began or Stopped
|
Test Well
(minutes)
|
Observation Wells
(minutes)
|
---|
0 to 5 minutes
|
0.5
|
0.5
|
5 to 10 minutes
|
1
|
1
|
10 to 30 minutes
|
2
|
2
|
30 to 60 minutes
|
5
|
5
|
60 to 120 minutes
|
10
|
10
|
2 to 8 hours
|
30
|
30
|
8 to 24 hours
|
60
|
60
|
24 or more hours
|
120
|
120
|
[l] If the water levels in the observation
wells and test well do not fully recover to static (prepumping) levels
within a length of time since pumping stopped equal to the length
of pumping, the test will be deemed to have failed unless adequate
data can be provided to ensure that the aquifer is of sufficient extent
to prevent the mining of groundwater.
[m] Groundwater samples should be collected
during the pumping test from the pumping well. The samples should
be collected in accordance with the NJDEP Field Procedures Manual.
At a minimum, the samples should be analyzed by a NJDEP certified
laboratory for hardness, iron, manganese, copper, lead, nitrate, ammonia,
chloride, and coliform bacteria. In addition, field measurements of
pH, conductivity, and total dissolved solids should be made with calibrated
instruments. If site conditions indicate potential historic uses of
pollutants such as heavy metals, pesticides, herbicides, volatile
organic compounds, and/or semivolatile organic compounds, these analyses
should be conducted. Based on past historical operations at the site
or at nearby properties, the Planning Board, at its discretion, may
require additional analyses of groundwater to assess potential future
and current impacts. The results of the water sample analyses will
be used to assess background water quality.
[n] The Township may elect to have
a person of its choosing monitor the aquifer test at the expense of
the developer.
(b)
Adjacent properties. The observation wells shall
be placed to determine whether the cone of depression from the pumping
well will extend beyond the subdivision boundary in any direction.
This shall be determined by actual measurements or from projecting
the drawdown based on observation well data. If the wells are in use,
they should be allowed to stabilize before the pumping test begins.
A minimum of two water level measurements shall be collected from
each well before the test. For any observation well which has been
pumped within the 24 hours preceding the test, two depth to water
measurements at least one hour apart shall be collected.
(c)
Hydrogeologic report.
[1]
A hydrogeologic report shall be provided with
each major subdivision application. The report shall document the
design and implementation of the aquifer test. The report shall include
all water level data collected during the three phases of testing,
the calculations of aquifer characteristics such as transmissivity
and storage coefficient, calculations of the cone of influence, potential
impacts to adjacent well owners, and the long-term sustained yield
for the wells. The report shall also evaluate and draw conclusions
from the aquifer test based on data collected and evaluation of available
information concerning geologic conditions. The report shall include
a detailed hydrogeologic description of the aquifers encountered beneath
the site and adjacent properties. The report must include a detailed
evaluation of the water supply demand for an average and peak day
and this demand should be supported with information on anticipated
population, expected dwelling unit density, and size of dwelling units.
An inventory of all wells within 1,000 feet of the proposed subdivision
boundaries should be appended. Figures depicting site geology, topography,
water-level elevations, and plans shall be included.
[2]
In addition, all water-quality sampling data
including copies of the laboratory reports should be provided with
the hydrogeologic report. Tables summarizing the analytical results
should be included.
[3]
The report should include a detailed evaluation
of potential impacts from subsurface sewage disposal systems on groundwater
quality. A site plan depicting well, septic leach field, and fracture
trace locations at a minimum scale of one inch equals 200 feet should
be included. For any and all locations where a fracture or set of
fractures intersects one or more wells and/or septic leach fields,
a detailed assessment of treatment technologies should be included.
The treatment technologies should provide adequate assurances that
any and all groundwater pumped from the wells will satisfy federal
and New Jersey drinking water standards and will not be adversely
impacted by the septic leach field discharges.
[4]
The hydrogeologic report shall be prepared and
signed by a qualified hydrogeologist using applicable sections of
GSR 29 as a guide. A qualified hydrogeologist shall be an individual
who has received a minimum of a bachelor's degree in geology at an
accredited institution or has completed an equivalent of 30 semester
hours of geological education while obtaining a bachelor's or master's
degree in a related field of engineering or science at an accredited
institution. Such a person must also demonstrate five years of professional
work experience in the practice of applying geologic principals to
interpretation of groundwater conditions. The individual should provide
a resume or curriculum vitae to document education and experience
requirements.
[5]
The hydrogeologic report shall include the name
and license number of the well driller and pump installer. The report
should include the names of the persons and firm responsible for collecting
the water-level measurements. In addition, the report should include
copies of the completed NJDEP well records.
[6]
The aquifer test and analysis shall be deemed
to have failed if such test cannot demonstrate to the satisfaction
of the Planning Board that sufficient groundwater supply exists to
supply water via wells at a rate meeting at least the average daily
demand for the proposed development. If the drawdown is measured or
projected to be more than one foot at any existing adjacent property
well or along the subdivision boundary, the applicant's hydrogeologist
must evaluate the impact on adjacent properties based on the actual
condition of wells in that zone.
[7]
If a drawdown of five feet or more is noted
in any existing adjacent property well, or is projected at any property
boundary, then the proposed subdivision shall have failed the aquifer
test. In the event of a failed aquifer test, because a drawdown of
five feet or more is noted in any existing adjacent property well
or is projected at any property boundary, either the applicant should
decrease the number of lots to lessen demand or demonstrate to the
satisfaction of the Planning Board that the impacts will not significantly
reduce yields to existing and future wells.
(2) Aquifer test and analysis for individual lots in a
major subdivision of five or fewer lots.
(a)
Aquifer test. The procedure for testing wells
for subdivisions of five or fewer lots shall consist of pumping each
of the subdivision wells individually for two hours at a minimum of
five gallons per minute (gpm). During the testing of a well, no other
subdivision wells shall be operating. After pumping for two hours,
the pump shall be shut down and the rate of recovery measured. For
the well to pass the test, the pumping rate of five gpm must be maintained
for the full two hours and a recovery rate of two gpm must be achieved
over the first 30 minutes following shutoff of the pump.
[1]
In order to provide the necessary data to evaluate
the pump test results, the following conditions shall be met:
[a] The well shall remain undisturbed
for three days following drilling to allow aquifer conditions to stabilize.
[b] Water level measurements shall
be collected from the well and accessible adjacent wells (within 500
feet) before starting the pumping test.
[c] When the pump is turned on, the
discharge rate shall be monitored and maintained at a minimum of five
gpm. The flow rate must be measured with a calibrated flow meter or
orifice/manometer apparatus.
[d] Water levels in the pumping well
and adjacent observation wells shall be collected according to the
schedule in Table 2.
[e] Near the conclusion of the pumping
portion of the test, groundwater samples should be collected from
the discharge in accordance with the NJDEP Field Procedures Manual.
At a minimum, the samples should be analyzed by a NJDEP certified
laboratory for hardness, iron, manganese, copper, lead, nitrate, ammonia,
chloride, and coliform bacteria. In addition, field measurements of
pH, conductivity, and total dissolved solids should be made with calibrated
instruments. If site conditions indicate potential historic uses of
pollutants such as heavy metals, pesticides, herbicides, volatile
organic compounds, and/or semivolatile organic compounds, these analyses
should be conducted. Based on past historical operations at the site
or at nearby properties, the Planning Board, at its discretion, may
require additional analyses of groundwater to assess potential future
and current impacts. The results of the water sample analyses will
be used to assess background water quality.
[f] Immediately after the pump is shut
off, water-level recovery shall be measured accordance with Table
2. The recovery rate shall be determined from these water-level
recovery measurements for the first 30 minutes after the pump is shut
down. The measurements should indicate a flow into the well of at
least two gpm over this interval.
[g] In the event that the well shows
little drawdown (less than two feet) during the two-hour pumping portion
of the test, pumping may continue in lieu of the recovery rate portion
of the test. The minimum requirement for pumping after two hours is
that a minimum rate of two gpm be maintained for an additional hour
with no increase in drawdown. The recovery of the water level shall
still be monitored after the shutoff of the pump.
[h] A report summarizing the well construction
and aquifer testing shall be submitted to the Planning Board. The
report should include the water-level measurements and recovery rate
calculations. The report must include a detailed evaluation of the
water supply demand for an average and peak day, and this demand should
be supported with information on anticipated population, expected
dwelling unit density, and size of dwelling units.
[i] The report should include the well
driller's and pump installer's name and license numbers. In addition,
the names of the person and firm that measured the water-level drawdown
and recovery data, and calculated the recovery rate shall be provided.
The report should include a copy of the completed NJDEP well record
for all wells within the subdivision.
[j] Based on the results of the testing
and report, the Township may request additional analyses of the pumping
test data to evaluate aquifer characteristics, the potential cone
of influence, and potential impacts to other nearby groundwater users.
[i] If the test well fails any part
of the above test either by failing to maintain a pumping rate of
five gpm for two hours or failing to recover at a rate of two gpm
after pumping stopped, the well shall be considered unacceptable and
the applicant shall either replace the well or deepen the well to
intercept additional fractures or add additional well storage. After
well replacement or deepening, the entire test procedure shall be
repeated on the new or deepened well. If the new or deepened well
fails the testing procedure, the lot may, at the discretion of the
Planning Board, be classified as unacceptable for development.
(b)
Adjacent wells. Existing wells within 500 feet
of the test well or on adjacent lots shall be identified as observation
wells for the test. The applicant shall notify the owners of adjacent
lots which contain wells within 500 feet of the test well and such
owners shall be given an opportunity to have their wells monitored
following the same procedures set forth in Subsection C(1)(a)[13][a]
through [c] of this section. In the case where more than three existing
wells are located within 500 feet of the well to be tested, only the
three nearest accessible wells need to be monitored. However, if any
of the property owners requesting monitoring have wells completed
to a depth less than 100 feet, these wells must also be monitored
in addition to the three nearest wells. If the wells are in use, they
should, if possible, be allowed to stabilize before the pumping test
begins. One water level measurement shall be collected from each well
before the test. For any observation well which has been pumped within
the 24 hours preceding the test, two depth to water measurements at
least one hour apart shall be collected.
[1]
If drawdown is measured or projected to be more
than one foot at any existing adjacent property well or along the
subdivision boundary, the applicant must notify the Township and evaluate
the impact on adjacent properties based on the actual condition of
wells, the static water level, and the depth of the pump in the existing
well. The potential for adverse impacts needs to be evaluated by a
hydrogeologist who will investigate the depth, yield, and pumping
level of the effected well.
[2]
If a drawdown of five feet or more is noted
in any existing adjacent property well, or is projected at any property
boundary, then the proposed subdivision shall have failed the aquifer
test. In the event of a failed aquifer test because a drawdown of
five feet or more is noted in any existing adjacent property well
or is projected at any property boundary, either the applicant should
decrease the water-supply demand or demonstrate to the satisfaction
of the Planning Board that the impacts will not significantly reduce
yields to existing and future wells.
(3) Aquifer test and analysis for nonresidential use subdivision
and/or site plan.
(a)
Aquifer test.
[1]
An aquifer-pumping test shall be conducted when
a nonresidential use is proposed and will be served by on-site groundwater
supply. The pumping rate and total gallons pumped during the pumping
test should demonstrate that the needed water is available without
detrimental impact on the aquifer or nearby wells.
[2]
Demand shall be based on N.J.A.C. 7:10-12.6.
If the demand exceeds 100,000 gallons per day, a New Jersey water
allocation permit must be obtained from the New Jersey Department
of Environmental Protection. For demands less than 100,000 gallons
per day, the length of the pumping test will equal the greater of
the following: a) the volume of water removed from the aquifer is
equal to the peak demand; or b) eight hours. The peak demand should
be assumed to equal twice the average daily demand. The average daily
demand shall be calculated from the projected maximum monthly usage.
At a minimum, the pumping rate for the test should be equivalent to
120% of the expected long-term rate.
[3]
For nonresidential developments with an expected
average daily demand between 600 and 1,999 gallons per day, one observation
well is required. This well should be within 200 feet of the pumping
well. For developments with expected daily demands from 2,000 to 9,999
gallons per day, two observation wells are required. One of these
observation wells must be within 200 feet of the pumping well. A second
observation well must be within 200 and 500 feet of the pumping well.
These two wells should be located along strike of the major water-bearing
fractures intersected by the well. If a well(s) on one or more adjacent
properties are located within the distance limits above, and these
wells can be disconnected for a period of 24 hours prior to and during
the entire pumping and recovery phase, these wells can be used for
observation in lieu of installing new observation wells.
[4]
For all other nonresidential developments, three
or more observation wells are required. Two of these wells should
be located along strike of the major water-bearing fractures intersected
by the well. Additional observation wells should be located to evaluate
potential secondary fractures and impacts to adjacent properties.
The number of observation wells should be in accordance with Table
3.
Table 3: Aquifer Test Requirements for
Nonresidential Developments
|
---|
Average Demand
(gallons per day)
|
Number of Observation Wells
|
---|
600 to 1,999
|
1
|
2,000 to 9,999
|
2
|
10,000 to 99,999
|
5 (at least two on-site observation wells)
|
100,000 or more
|
Obtain NJDEP water allocation permit
|
[5]
The observation wells and test well must have
a geologic log describing the depth and types of soils and rocks encountered
and the depth and approximate yields of water-bearing fracture zones.
The observation wells should be completed to a similar depth as the
test well.
[6]
The design of the aquifer test shall be developed
using the applicable guidance from "Guidelines for Preparing Hydrogeologic
Reports for Water Allocation Permit Application with an Appendix on
Aquifer — Test Analysis Procedures" NJGS GSR 29, 1992). The
aquifer test shall be conducted according to the following procedure:
[a] Owners of existing wells on lots
located within 500 feet of the nonresidential development's property
boundary shall be given an opportunity to have their wells monitored
during the aquifer test. Such opportunity shall be given by the applicant
by notice via certified mail and shall give the time and place of
the well pumping test. Furthermore, the notice shall indicate that
such existing well may be monitored if agreed to by the well owner,
provided the well is readily accessible. Such notice shall indicate
that the existing well owner must respond within seven days and the
applicant's responsibility is to monitor up to three wells on properties
within 500 feet of the site boundaries. If the owner of the lot within
500 feet of the site boundaries decides to participate by agreeing
to have their existing well monitored, they shall notify the applicant
by certified mail. Such response shall be provided within seven days
of receipt of the certified notice from the applicant. If the applicant
receives no response within the time provided, the response shall
be deemed to be negative.
[b] If the owner of a lot within 500
feet of the subdivision boundaries is to have his existing well monitored,
the applicant shall bear full responsibility for protection of the
well against contamination and shall return the well to its premonitoring
condition to the satisfaction of the lot owner.
[c] In the case when more than three
property owners within 500 feet of the nonresidential development's
property boundaries decide to participate and to have their existing
wells monitored, only three nearest to the test well need be monitored.
However, if any of the property owners requesting monitoring have
wells completed to a depth less than 100 feet, these wells must also
be monitored in addition to the three nearest wells.
[d] Prior to conducting an aquifer
test, the applicant shall submit the design of such aquifer test,
including the location of wells to be monitored on adjacent lots and
qualifications of the persons and firm who will be performing the
test for review by the Township. In the case where the nonresidential
development to be served by a single on-site well with an average
daily water demand of 600 to 1,999 gallons is unable to secure approval
to monitor wells on adjacent lots, the applicant may design their
aquifer test using recognized techniques to estimate approximate values
of aquifer characteristics in lieu of installing an observation well
on the property. The applicant shall submit an escrow fee of $500
along with the design of the aquifer test. The purpose of the escrow
fee is to cover the cost of Township review of the proposed aquifer
test. Such review may include submission of such design to a qualified
hydrogeologist representing the Township for review and recommendations.
[e] The pumping test will be comprised
of three phases. The first phase will involve the collection of background
water levels prior to the start of the test. The second phase will
involve the pumping of water from the well and the monitoring of water-level
drawdown in the observation and pumping wells. The third phase will
involve the recovery of water levels in the observation and pumping
wells after the pump has been shut down. This third phase of the test
should, at a minimum, be the same length as the pumping phase.
[f] If at all possible, the pumping
test (all three phases) should not be conducted during precipitation
events. If precipitation occurs during the test, the applicant should
provide precipitation amounts and sufficient data to show that the
precipitation did not recharge the aquifer during the test and adversely
impact the testing results.
[g] The background phase includes allowing
the test well and observation wells to stabilize for a minimum of
three days before the test. At a minimum, water levels should be collected
from the test well and observation wells 24 hours and one hour prior
to the start of pumping. It is the applicant's responsibility to collect
sufficient data to determine background conditions and to ensure that
antecedent influences can be fully characterized. Barometer measurements
and additional water-level measurements can be made by the applicant
to evaluate the change in water levels resulting from barometric pressure
changes and/or influences from off-site pumping.
[h] On the day of the pumping phase,
water levels shall be collected from all wells. For those wells showing
a change of more than 0.1 foot, a second round of measurements shall
be collected before starting the test. Additional rounds of measurements
may be necessary to determine that the well is in equilibrium. However,
if the applicant has barometric pressure and water-level data to indicate
that the change in static levels is due to changes in barometric pressure,
the applicant can submit these data in lieu of delaying the pumping
test.
[i] The pump and discharge pipe shall
be equipped with an orifice/manometer apparatus and calibrated flow
meter to instantaneously measure flow rate and determine total volume
pumped from the well. The discharge shall be directed so that it leaves
the site without infiltrating to the aquifer. Any and all permits
required by the NJDEP for the discharge of water must be obtained
prior to starting the test.
[j] When the pump is started the flow
rate shall be adjusted immediately to a uniform pumping rate as required
for a constant rate test and in accordance with the approved pumping
test plan. The flow rate should not vary more than 10% throughout
the test. If the flow rate fluctuates more than 10%, the test may
be deemed invalid and the applicant required to repeat the notification
and testing process. At a minimum, the flow rate for the test should
be equal to 120% of the flow rate required to satisfy the average
daily demand.
[k] Water-level measurements during
the pumping phase of the test shall be collected in accordance with
Table 4. This same schedule shall be followed for the recovery phase
of testing upon shut down of the pump in the test well.
Table 4: Frequency of Water-Level Measurements
After Aquifer Testing
|
---|
Time Since Pumping Began or Stopped
|
Test Well
(minutes)
|
Observation Wells
(minutes)
|
---|
0 to 5 minutes
|
0.5
|
0.5
|
5 to 10 minutes
|
1
|
1
|
10 to 30 minutes
|
2
|
2
|
30 to 60 minutes
|
5
|
5
|
60 to 120 minutes
|
10
|
10
|
2 to 8 hours
|
30
|
30
|
8 to 24 hours
|
60
|
60
|
24 or more hours
|
120
|
120
|
[l] If the water levels in the observation
wells and test well do not fully recover to static (pre-pumping) levels
within a length of time since pumping stopped equal to the length
of pumping, the test will be deemed to have failed unless adequate
data can be provided to ensure that the aquifer is of sufficient extent
to prevent the mining of groundwater.
[m] Groundwater samples should be collected
during the pumping test from the pumping well. The samples should
be collected in accordance with the NJDEP Field Procedures Manual.
At a minimum, the samples should be analyzed by a NJDEP certified
laboratory for hardness, iron, manganese, copper, lead, nitrate, ammonia,
chloride, and coliform bacteria. In addition, field measurements of
pH, conductivity, and total dissolved solids should be made with calibrated
instruments. If site conditions indicate potential historic uses of
pollutants such as heavy metals, pesticides, herbicides, volatile
organic compounds, and/or semivolatile organic compounds, these analyses
should be conducted. Based on past historical operations at the site
or at nearby properties, the Planning Board, at its discretion, may
require additional analyses of groundwater to assess potential future
and current impacts. The results of the water sample analyses will
be used to assess background water quality.
[n] The Township may choose to have
a person of its choosing monitor the aquifer test at the expense of
the developer.
(b)
Adjacent properties. The observation wells shall
be placed to determine whether the cone of depression from the pumping
well will extend beyond the subdivision boundary in any direction.
This shall be determined by actual measurements or from projecting
the drawdown based on observation well data. If the wells are in use,
they should be allowed to stabilize before the pumping test begins.
A minimum of two water level measurements shall be collected from
each well before the test. For any observation well which has been
pumped within the 24 hours preceding the test, two depth to water
measurements at least one hour apart shall be collected.
(c)
Hydrogeologic report.
[1]
A hydrogeologic report shall be provided with
each nonresidential use subdivision/site plan application. The report
shall document the design and implementation of the aquifer test.
The report shall include all water-level data collected during the
three phases of testing, the calculations of aquifer characteristics
such as transmissivity and storage coefficient, calculations of the
cone of influence, potential impacts to adjacent well owners, and
the long-term sustained yield for the wells. The report shall also
evaluate and draw conclusions from the aquifer test based on data
collected and evaluation of available information concerning geologic
conditions. The report shall include a detailed hydrogeologic description
of the aquifers encountered beneath the site and adjacent properties.
The report must include a detailed evaluation of the water supply
demand for an average and peak day and this demand should be supported
with information on anticipated population, expected dwelling unit
density, and size of dwelling units. An inventory of all wells within
1,000 feet of the proposed subdivision boundaries should be appended.
Figures depicting site geology, topography, water-level elevations,
and plans shall be included.
[2]
In addition, all water-quality sampling data
including copies of the laboratory reports should be provided with
the hydrogeologic report. Tables summarizing the analytical results
should be included.
[3]
The report should include a detailed evaluation
of potential impacts from subsurface sewage disposal systems on groundwater
quality. A site plan depicting well, septic leach field, and fracture
trace locations at a minimum scale of one inch equals 200 feet should
be included. For any and all locations where a fracture or set of
fractures intersects the on-site water supply well and/or septic leach
field, a detailed assessment of treatment technologies should be included.
The treatment technologies should provide adequate assurances that
any and all groundwater pumped from the well will satisfy federal
and New Jersey drinking water standards and will not be adversely
impacted by the septic leach field discharges.
[4]
The hydrogeologic report shall be prepared and
signed by a qualified hydrogeologist using applicable sections of
GSR 29 as a guide. A qualified hydrogeologist shall be an individual
who has received a minimum of a bachelor's degree in geology at an
accredited institution or has completed an equivalent of 30 semester
hours of geological education while obtaining a bachelor's or master's
degree in a related field of engineering or science at an accredited
institution. Such a person must also demonstrate five years of professional
work experience in the practice of applying geologic principals to
interpretation of groundwater conditions. The individual should provide
a resume or curriculum vitae to document education and experience
requirements.
[5]
The hydrogeologic report shall include the name
and license number of the well driller and pump installer. The report
should include the names of the persons and firm responsible for collecting
the water-level measurements. In addition, the report should include
copies of the completed NJDEP well records.
[6]
The aquifer test and analysis shall be deemed
to have failed if such test cannot demonstrate to the satisfaction
of the Planning Board that sufficient groundwater supply exists to
supply water via wells at a rate meeting at least the average daily
demand for the proposed development. If the drawdown is measured or
projected to be more than one foot at any existing adjacent property
well or along the nonresidential subdivision/site plan boundary, the
applicant's hydrogeologist must evaluate the impact on adjacent properties
based on the actual condition of wells in that zone.
[7]
If a drawdown of five feet or more is noted
in any existing adjacent property well, or is projected at any property
boundary, then the proposed subdivision shall have failed the aquifer
test. In the event of a failed aquifer test, because a drawdown of
five feet or more is noted in any existing adjacent property well
or is projected at any property boundary, either the applicant should
decrease the average daily demand or demonstrate to the satisfaction
of the Planning Board that the impacts will not significantly reduce
yields to existing and future wells.