In setting forth general regulations in this
article, it is the intent of the Township to establish clear standards
for activities and the design and impact of site development that
may be associated with a variety of zoning districts or types of land
use. In most instances, these regulations are to be interpreted and
applied in conjunction with the requirements of one or another use
district of this chapter; they are limited with respect to the Zoning
Map only as stipulated by the terms of this article.
Except for the requirements in Section 12(h)
of the Township Junkyard and Refuse Ordinance, or a retaining wall
or a wall of a building permitted under the terms of this chapter,
no fence or wall erected within any required yard area shall exceed
six feet in height unless that portion of the fence or wall which
exceeds six feet in height has a ratio of open area to solid area
of at least four to one (4:1).
[Amended 8-16-1995 by Ord. No. 95-02; 11-29-2018 by Ord. No. 05-2018]
A. General applicability. All persons undertaking any of the following activities shall comply with the standards and procedures in Subsections
B through
G below:
(1) Building construction.
(a)
All nonresidential buildings, excluding agricultural buildings
and buildings accessory to single-family residential uses.
(b)
All residential buildings.
(2) Construction of the following streets, parking areas, loading and
storage areas:
(a)
All streets to be dedicated to the Township.
(b)
All private streets and driveways with cartways 18 feet or more.
(c)
Any parking area which exceeds 8,000 square feet.
(d)
Any loading or storage area, for equipment and materials, which
exceeds 8,000 square feet.
(3) Construction or expansion of any of the following structures or facilities
that exceeds 4,000 square feet in ground coverage:
(a)
Public utility facilities and structures.
(b)
Liquid and solid waste collection, storage, conveyance, and
treatment facilities; junkyard.
(c)
Stormwater management basins and related facilities.
(4) Earthmoving and grading areas exceeding one acre, excluding those
areas associated with on-lot site preparation for single-family and
two-family residential lots, and further excluding agricultural operations.
B. Mitigation of visual impacts.
(1) Consistent with the visual impact plan developed under Subsection
D, below, the applicant shall plant trees and shrubs and make other landscape improvements (e.g., berms, fences), as necessary, to mitigate the adverse visual impacts which his proposed actions will have on his property, adjoining properties, and the Township in general.
(2) In demonstrating compliance with Subsection
B(1) above, the applicant shall follow the minimum planting guidelines and landscape design guidelines set forth below. Where the proposed landscape improvements do not conform to these guidelines, the applicant shall undertake other design measures (e.g., site planning, architectural, landscape architectural) which, in the judgment of the Board of Supervisors, achieve comparable results or which render the guidelines unnecessary or inappropriate.
[Amended 3-7-2024 by Ord. No. 01-2024]
Table 1
|
---|
Minimum Planting Guidelines
|
---|
Improvement Conditions
|
Deciduous Trees
|
Deciduous Shrubs
|
Understory Trees
|
Evergreen Trees
|
Evergreen Shrubs
|
---|
Per 1,000 square feet ground floor area/building footprint
|
1
|
4
|
1
|
1
|
4
|
Per 1,000 square feet paved area (not including single-family
driveways)
|
1
|
2
|
*
|
1
|
2
|
Per 100 linear feet of existing road frontage
|
1
|
5
|
1
|
1
|
5
|
Per 100 linear feet of property boundary along adjoining residential
or institutional properties
|
1
|
5
|
1
|
1
|
5
|
Explanatory Notes for Table 1
|
---|
1.
|
Asterisk (*) indicates additional plantings at the applicant's
discretion.
|
2.
|
Minimum sizes of plantings should be:
|
|
(a)
|
Trees: 2.5 to 3.0 inches DBH.
|
|
(b)
|
Shrubs: 24 to 30 inches height or spread.
|
3.
|
Fractions of plants calculated from Table 1 should be rounded
up to the nearest whole number.
|
4.
|
Plantings required per gross building area and paved areas may
be utilized for on-lot or supplemental perimeter buffers.
|
(3) In addition to the standards in Table 1, these minimum guidelines
shall be followed for parking areas:
(a)
Parking areas exceeding 20,000 square feet:
[1]
The parking area's net perimeter (total perimeter less street
access lanes) should be bordered by planting areas at least 15 feet
in width.
(b)
No more than 12 parking spaces shall be placed in a continuous
row without an intervening planting area of at least 72 square feet.
(4) Because of the many benefits of native plants (price, longevity,
wildlife habitat, etc.), the applicant shall conform to the minimum
planting guidelines in Table 1 through the use of native trees and
shrubs. Seventy-five percent of all plantings shall be species native
to this geographic area as determined by Penn State Extension.
(5) Species selected by the applicant should reflect the following considerations:
(a)
Existing site conditions and their suitabilities for the plant
materials, based upon the site's geology, hydrology, soils, and microclimate.
(b)
Specific functional objectives of the plantings, which may include
but need not be limited to visual screening, noise abatement, energy
conservation, wildlife habitats, and aesthetic values.
(c)
Maintenance and replacement considerations such as hardiness,
resistance to insects and disease, longevity, and availability and
cost of plant materials.
(6) For the purposes of promoting disease resistance, minimum maintenance,
diverse natural plant associations, and long-term stability of plantings,
the applicant is encouraged to choose those combinations of species
which may be expected to be found together under more-or-less natural
conditions on sites comparable to those where the trees and shrubs
are to be planted. Specification of native species as noted above
will assist in fulfilling this requirement.
C. Landscape design guidelines.
(1) Plantings should be provided in arrangements and locations which
best mitigate the adverse impacts of the applicant's proposed site
disturbance actions.
(2) Planting areas should be selected and designed to reflect natural
landscape characteristics existing prior to site disturbance, as well
as those environmental conditions to be created following site disturbance
by the applicant.
(3) The locations, dimensions, and spacing of required plantings should
be adequate for their proper growth and maintenance. This includes
taking into account the sizes of such plantings at maturity and their
present and future environmental requirements, such as moisture and
sunlight.
D. Visual impact plan. For all activities identified in Subsection
A above, the applicant shall submit a plan that includes provisions for impact mitigation and long-term maintenance, as follows:
(1) Depiction on the property base map of mitigation measures proposed by the applicant, including number and placement of plantings, and of other landscape or design improvements as specified in Subsection
B.
(2) Delineation of views of the applicant's property as it would be developed,
as seen from adjoining properties used or zoned for residential or
institutional purposes, and from existing adjoining public roads.
Such views shall be classified according to whether views of the applicant's
proposed improvements would be hidden, filtered, or unobstructed.
With respect to adjoining roads, such views shall be based upon the
viewer's location at the far edge of the road cartway, the opposite
edge of which directly abuts the property. With respect to adjoining
properties, the viewer's location shall be along the lines established
by the minimum front, side, and rear yard distances as required by
existing zoning for those properties.
(3) Documentation showing the extent to which the landscape planting
and design measures conform to the guidelines in Table 1. Where they
do not conform, the applicant shall demonstrate one or more of the
following:
(a)
That other mitigation measures chosen will produce comparable
or superior results;
(b)
That, through design excellence in site planning, landscape
architecture, and/or architecture, the guidelines in Table 1 are unnecessary
or inappropriate;
(c)
That the need to mitigate in accordance with the guidelines
constitutes an unreasonable or unnecessary financial burden.
(4) Sufficient information to demonstrate that all maintenance standards in Subsection
E will be complied with.
E. Site maintenance standards.
(1) All landscape improvements to be provided in accordance with Subsection
B above shall be installed and maintained by accepted practices as recognized by the American Society of Landscape Architects. Planting and maintenance of vegetation shall include, as appropriate, but need not be limited to, provisions for surface mulch, guy-wires and stakes, irrigation, fertilization, insect and disease control, and pruning.
(2) The applicant shall make arrangements acceptable to the Township that all landscape improvements installed in accordance with this chapter shall be maintained in a healthy and/or sound condition, or otherwise be replaced by equivalent improvements, for a period of at least 18 months following their installation, except as otherwise required by Chapter
350, Subdivision and Land Development.
F. Additional screening requirements. In addition to complying with
applicable standards of this section, certain uses permitted under
terms of this chapter shall be required to comply further with specific
screening standards necessitated by the nature of the use. In such
cases, compliance with those standards shall be in addition to meeting
the applicable standards of this section; where standards appear to
be in conflict, compliance shall be with the more stringent requirement.
G. In response to this ordinance, a combination of elevation, section
or perspective drawings shall be submitted to adequately portray the
completed project appearance.
The following standards shall apply to the storage
of all man-made materials:
A. Storage for periods in excess of 30 days shall be
screened from view of any public right-of-way and any contiguous residential
use. Screening shall consist of continuous evergreen plantings and/or
include an architectural screen.
B. No storage shall be permitted within the front yard
of a lot.
C. No merchandise, goods, articles, or equipment shall
be stored, displayed, or offered for sale outside any building except
seasonal articles which are too large or otherwise infeasible to be
stored indoors. Such articles shall be stored adjacent to the principal
building housing the commercial use, and shall be enclosed by either
walls or opaque fencing designed to be architecturally compatible
with the building. Such enclosure shall be at least six feet high.
Any outdoor display area shall be considered sales floor area for
purposes of computing building coverage and parking requirements.
D. Any organic refuse and garbage shall be stored in
tight, vermin-proof containers. On multifamily, commercial, or industrial
properties, solid waste storage shall be centralized to expedite collection.
Storage containers shall be enclosed on three sides by an architectural
screen.
E. Flammable and combustible liquids, solids, or gases
shall be stored in accordance with the Township Fire Code. There shall
be no storage of hazardous waste anywhere within the Township, including
temporary storage in a parked vehicle. Hazardous waste shall be as
defined in Pennsylvania Act 97-1980, or any subsequent amendment or
revision thereto.
Unless otherwise specified, the following regulations
shall apply to all uses except single-family and two-family dwellings:
A. Access aisles and drives.
(1) Interior drives shall be designed to prevent blockage
of vehicles entering or leaving the site. Drives may be one-way or
two-way. Areas designed for loading and unloading, refuse collection,
fuel delivery, and other service vehicles shall be arranged to prevent
blocking or interfering with accessways and the use of automobile
parking facilities or pedestrianways. Adequate turnaround surface
shall be provided to permit egress to the street in a forward direction.
(2) Traffic channelization shall be planned such that
a main driving aisle, which vehicles can use to enter the site and
parking bays, is remote from any primary building so as to avoid traffic
conflicts in front of the primary building.
(3) Parking areas shall be designed so that a vehicle
within a parking area will not need to enter a public street to move
from one location to any other location within the parking area or
lot.
(4) All interior drives and accessways shall have an approved
all-weather surface, and shall be graded, properly drained, and maintained
in good condition. Interior drives shall have a maximum grade of 8%,
measured along the center line, for a distance of not less than 25
feet from the street right-of-way line. Beyond that point, interior
roads and drives shall have a maximum grade of 10%.
B. Shared access. Common or shared access driveways to
parking and loading areas are permitted and encouraged. Landowners
proposing such an arrangement shall submit a site plan and a proposed
access easement indicating the extent and location of joint use; the
area subject to the access easement shall be delineated on the site
plan. Terms of the access easement also shall include the extent of
common ownership and the method of assessing repair and maintenance
costs. The proposed site plan and access easement shall be subject
to approval by the Board of Supervisors; upon approval, the plan and
easement shall be recorded so as to be binding on all successors or
assigns.
C. Fire lane easements.
(1) Every use, building, or structure located on a lot
shall be designed to provide safe and convenient access for emergency
service vehicles. Fire lane easements may be required by the Board
of Supervisors to assure access. When required, fire lane easements
shall extend to the public road and have a minimum right-of-way width
of 50 feet where future public dedication of the easement area is
seen as a possibility. The area within the easement shall be graded,
maintained obstruction-free, and have sufficient stability for use
by emergency vehicles. The design of such fire lane easements shall
be approved by the Board of Supervisors upon the recommendation of
the East Brandywine Fire Company.
[Amended 8-20-2003 by Ord. No. 03-04]
(2) Dead-end fire lane easements shall not exceed 400
feet in length and shall be terminated with an unobstructed vehicular
turnaround or cul-de-sac with a minimum surface radius of 35 feet.
D. Pedestrian circulation. The following regulations
shall govern all uses, as applicable:
(1) The landowner or developer shall preserve existing
trails or install trails and pathways or other pedestrian facilities
as necessary and desirable to achieve the following:
(a)
Logically continue, link, or expand existing
pedestrian facilities on, across, and abutting the site.
(b)
Provide pedestrian access to existing or anticipated
public transportation pickup points, public parks, community facilities
and, where practical, commercial areas.
(c)
Provide convenient and logical walkway connections
between the entrances of a principal building and its required parking
spaces, preferably in conjunction with landscaped planting islands
that provide shade, visual relief from glare, and physical separation
from vehicular areas.
(2) Maximum separation of pedestrian and vehicular routes
shall be encouraged, where space permits, for safety and comfort of
pedestrians. Separation can be in the form of any one or a combination
of the following: horizontal distance; vertical separation and level
changes; street trees, landscaping, and other barriers such as berms
and fences.
[Amended 7-7-2016 by Ord.
No. 04-2016; 11-29-2018 by Ord. No. 05-2018]
A. The following standards shall apply to all exterior light fixtures
within East Brandywine Township, except street lighting and associated
traffic safety devices provided by a public utility or governmental
entity within a public right-of-way:
(1) The light from any exterior light fixture (the light source and its
enclosure, including any reflectors or other devices for the control
of light) shall be shaded, shielded, or directed to prevent direct
light from being cast beyond an angle of 35° from a vertical plane
and to prevent glare or other objectionable problems to surrounding
areas. All fixtures shall be deemed as "cut-off" by industry standards.
(2) Lighting fixtures shall not exceed 16 feet in height. Alternate fixture
heights shall be considered for proposed special purpose, parking
and roadway lighting. These would include recreational, commercial,
residential and industrial uses.
(3) Except for LED signs and changeable display signs, as addressed in §§
399-119F and
399-119.1, respectively, no lighting fixture shall have any blinking, flashing, or fluttering lights or other illuminating device which has a changing light intensity, brightness, or color; nor will any beacon lights be permitted.
(4) Neither the direct nor reflected light from any lighting fixture
shall create a disabling glare that would be a potential traffic hazard
for motor vehicle operators on public roads.
(5) Minimum lighting levels in footcandles:
|
Commercial
|
Residential
|
---|
Pedestrian areas
|
|
|
|
Sidewalks
|
1.0
|
0.3
|
|
Pedestrian ways
|
2.0
|
0.5
|
Vehicular road
|
|
|
|
Collector road
|
1.2
|
0.6
|
|
Local road
|
0.9
|
0.4
|
|
Alleys
|
0.6
|
0.2
|
|
Collector road/local road intersection
|
1.5
|
1.0
|
Parking areas
|
|
|
|
Self-parking
|
2 to 3
|
—
|
|
Attendant parking
|
2.0
|
—
|
Building areas
|
|
|
|
Entrances
|
5.0
|
—
|
|
General grounds
|
1.0
|
—
|
(6) Unless otherwise specified above, proposed lighting facilities shall
reflect recommendations for site illumination as published by the
Illuminating Engineering Society of North America (IESNA).
(7) There is a significant variety of well-designed and efficient light
fixtures developed by lighting manufacturers. Poles and fixtures should
reflect the adjacent architectural building style. This is especially
required for fixtures selected to illuminate historic structures and
surrounding grounds.
B. Lighting systems and standards for major outdoor facilities such as athletic fields or stadiums, for which the above standards are inappropriate and unattainable, shall be permitted when approved as a special exception by the Zoning Hearing Board. The applicant shall demonstrate that the proposed lighting system is designed and will be operated to minimize objectionable impacts on other properties; the Board shall be further guided by the standards in §
399-145 of this chapter.
C. Streetlighting.
(1) Any use to be located at a street intersection involving a collector
or arterial street shall be responsible to provide adequate street
lighting to assure safe access to and from the property.
(2) Requirements for lighting along any proposed new street shall be as stipulated in Article
VI of Chapter
350, Subdivision and Land Development.
(3) Proposed street lighting equipment and design shall be reviewed and
approved by the public utility providing power.
[Amended 6-17-2009 by Ord. No. 06-2009]
A. Except as noted in Subsection
B below, the following shall apply to specified uses and properties within the Township, between the hours of 10:00 p.m. and 6:00 a.m., plus all day Sunday and legal holidays.
(1) There shall be no nonresidential off-street loading operation.
(2) There shall be no operation of a vehicle in excess of 8,600 pounds
on the property, nor idling of any motor of such vehicle.
(3) There shall be no outside operation for nonresidential purposes of
any powered equipment, mobile refrigeration unit, powered hand tool,
fork lift, tractor, or other similar vehicle except for lawn maintenance,
snow removal, or emergency services or repairs.
(4) Other than police, fire, public service, or ambulance operators,
no person shall sound any horn, bell, gong, siren, or whistle or make
other unnecessarily loud noises except when reasonably required to
prevent accidents.
(5) There shall be no outdoor loudspeakers or similar amplification which
may be heard beyond the property line.
B. Noise. No person shall operate, or cause to be operated on private
or public property, any source of continuous sound (any sound which
is static, fluctuating or intermittent with a recurrence greater than
one time in any fifteen-second interval) in such a manner as to create
a sound level which exceeds the limits set forth in the following
table when measured at or within the property boundary of the receiving
land use.
|
Receiving Land Use Category
|
Time
|
Sound Level Limit
(dBA)
|
---|
|
Residential, public or open space
|
7:00 a.m. to 10:00 p.m.
|
70
|
|
|
10:00 p.m. to 7:00 a.m.
|
55
|
|
Agricultural or institutional
|
7:00 a.m. to 10:00 p.m.
|
70
|
|
|
10:00 p.m. to 7:00 a.m.
|
55
|
|
Commercial or business
|
7:00 a.m. to 10:00 p.m.
|
70
|
|
|
10:00 p.m. to 7:00 a.m.
|
60
|
|
Industrial
|
At all times
|
70
|
(1) For any source of sound which emits a pure tone, the maximum sound
level limits set forth in the above table shall be reduced by five
dBA. For any source of sound which emits an impulsive sound (a sound
of short duration, with an abrupt onset and rapid delay and an occurrence
of not more than one time in any fifteen-second interval) the excursions
of sound pressure level shall not exceed 20 dBA over the ambient sound
level, regardless of time of day or night of receiving land use, using
the "fast" meter characteristics of a Type II Meter, meeting the ANSI
specifications S1.4-1971.
C. For any proposed or existing use of land in which potential or actual noise impacts need amelioration, the means to ameliorate such impacts shall be proposed by the applicant and reviewed by the Township on a case-by-case basis. The use of berms, existing and installed vegetation, fencing or similar enclosure, etc., shall be considered by the Township and, where deemed suitable, may permit modification or waiver of restrictions in Subsection
A above.
D. When operated within East Brandywine Township, recreational off-road vehicles or all-terrain vehicles must be equipped with equipment meeting manufacturer's specifications for sound dissipative devices such as mufflers, etc., and must meet the operational regulations of Chapter
241, Vehicles, All-Terrain.
E. No person shall operate or permit to be operated any source of noise
in such a manner as to create a sound pressure level which exceeds
the limits set forth for the receiving land shown in the table herein
when measured at the property boundary, or at other appropriate locations
on the receiving property. When a noise source can be identified and
its noise measured in more than one land use category, the limits
of the most restrictive use shall apply.
F. All measurement shall be made with a sound level meter which is in
conformance with the American Standards Association's specifications.
The minimum time period for measuring the stationary source of noise
shall be five minutes, and where practical, the microphone of the
sound level meter shall be positioned 5 1/2 feet above ground
level.
G. The maximum permissible sound level as listed in the previous table
shall not apply to any of the following noise sources:
(1) Blasting, only if performed in accordance with a permit issued by
the Pennsylvania Department of Environmental Protection or other governmental
agency having jurisdiction. Such blasting may occur only between the
hours of 7:00 a.m. and 5:00 p.m., Monday through Friday, unless specifically
authorized at different times by all entities having jurisdiction.
(2) Emergency work to provide electricity, water or other public utilities,
or to restore essential public services, including construction activities
directly related to the abatement of an emergency, or providing the
utility services.
(3) Any municipal street maintenance or construction, or similar municipal
construction activities.
(4) Noise made by bells, chimes, carillons or similar devices used for
religious purposes or in conjunction with national or local celebrations
or public holidays; existing bells, chimes or carillons and clock-strike
mechanisms that are currently in use for any purpose.
(5) Motor vehicle operations provided however that the same shall not
exceed the noise levels established in Chapter 157 of Title 67 of
the Pennsylvania Code of Regulations, Subchapter B, Established Sound
Levels.
(6) Sound sources typically associated with residential uses (i.e., voices
of children at play, air conditioners in good working order, etc.).
(7) Sound sources associated with property maintenance (i.e., lawn mowers,
edgers, blowers or vacuums, swimming pool pumps, power tools, etc.),
or domestic power tools.
(8) Safety, warning and alarm devices, including house and car alarms,
and other warning devices that are designed to protect health, safety
and welfare, provided such devices are not negligently maintained.
(9) The normal operation of public and private schools typically consisting
of classes and other school-sponsored activities.
(10)
Normal maintenance activities of golf courses such as the operation
of lawn mowers, edgers, aerators, blowers and similar equipment, provided
such activities take place between the hours of 5:00 a.m. and 9:00
p.m., May through September, and 7:00 a.m. and 6:00 p.m., October
through April.
(11)
Emergencies involving the execution of the duties of authorized
governmental personnel and others who provide emergency response to
the general public, including but not limited to sworn peace officers,
emergency fire and medical personnel, utility personnel, and the operation
of emergency response vehicles and equipment.
(12)
The emission of sound for the purpose of alerting persons to
the existence of an emergency or associated practice drills.
(13)
Construction (i.e., construction, alteration, demolition or
repair activities); provided, however, that all construction equipment
shall be fitted with factory-installed muffling devices, and that
all construction equipment shall be maintained in good working order.
(14)
Sound sources associated with agricultural operations on agricultural
land, which are carried out in a manner consistent with the practice
and within the standards of the agricultural industry. This includes,
without limitation, all mechanical devices, apparatus or equipment
utilized for the protection or salvage of agricultural crops during
periods of adverse weather conditions or when the use of mobile sources
is necessary for pest control.
(15)
Public celebrations specifically authorized by the Township.
(16)
Sound sources associated with legal nonconforming and/or existing
permitted commercial, industrial or nonprofit operations, which do
not significantly change existing on-site activities, or result in
a change in the number of days or daily hours of operation.
(17)
Gunfire occurring while hunting consistent with all state laws
on private property.
(18)
Receiving land shall not include space within a building in
which the noise originated.
H. Temporary permits. The Board of Supervisors may grant temporary permits
allowing an operation or action that causes sound in excess of the
maximum sound levels permitted herein.
(1) Upon receipt of a completed application, the Board of Supervisors
shall make a determination based upon the following criteria:
(a)
The temporary operation will not severely jeopardize the health,
safety and welfare of any other person or entity.
(b)
The denial of said permit will not cause undue hardship to the
applicant, community or other person or entity.
(c)
The operation or action will not have an adverse effect on adjacent
landowners.
(d)
The operation or action will not exceed 14 days.
(e)
In approving the application, the Board of Supervisors may impose
reasonable conditions and restrictions as they deems necessary.
(2) Any person or entity seeking a permit pursuant to this section shall
make written application to East Brandywine Township on forms provided
by the Township. Said application shall contain the following information:
(a)
Name, address telephone number and e-mail address (if any) of
the applicant.
(b)
Location of the proposed operation or activity.
(c)
The nature of the proposed activity or operation.
(d)
The estimated levels of sound to be generated by the proposed
activity or operation.
(e)
The hours or duration of the proposed activity or operation.
(f)
An explanation of the reason bringing the proposed activity
or operation into compliance with this regulation would impose an
unreasonable hardship on the applicant, the community or any other
person or entity.
(3) The Board of Supervisors shall, within 30 days of the date of the
submission of a complete application, make a determination on the
approval or disapproval of the application. The applicant shall be
notified of the date, time and place of the public meeting where this
application shall be considered. Notice to the applicant shall be
by first class mail, e-mail or facsimile not less than five days prior
to the public meeting. Said decision shall be made at a public meeting
of the Board of Supervisors. The final decision shall be communicated
to the applicant in writing within five business days of the public
meeting.
(4) Approval of the application shall be provided in writing, and shall
include any conditions or restrictions imposed by the Board of Supervisors.
(5) The permit issued pursuant to the approval shall not be effective
until all conditions imposed by the Board of Supervisors have been
met. Noncompliance with any conditions imposed by the Board of Supervisors
shall cause an automatic revocation of the permit and thereafter any
operation or activity shall be in compliance with the regulations
shown herein.
(6) In making application for a permit pursuant to this section, the
applicant agrees to indemnify and hold harmless East Brandywine Township
from any and all liability arising with the proposed operation or
activity.