BURN BUILDING
DESIGN AND CONSTRUCTION SYMPOSIUM:
SITE SELECTION AND
ENVIRONMENTAL CONCERNS
Presented by
Paul D. Edmeades, AIA
Edmeades & Stromdahl, Ltd.
34 North Main Street
Bel Air, Maryland 21014
INTRODUCTION
I have been involved in Fire Facility Design for over 15 years.
Over the past 12 years I have researched and designed a number of fire training
facilities and have prepared programming and feasibility studies to examine the
suitability of particular sites for fire training facilities. In the course of
my work I have designed several facilities for the Maryland Fire and Rescue
Institute (MFRI) [ www.mfri.org ]. What I can offer
you as decision makers in fire training facility design is a logical decision
making process and some intelligent questions to ask regarding site selection
and site evaluation. I do not have stock answers to your questions. Each
facility program is different, each site requires a different approach and
therefore each fire training facility will be unique.
I have divided this presentation into three sections which correspond to the
process that we have developed to analyse sites for fire training facilities.
Section 1 - Site Selection: Identification of the needs, preparation of a
facility program, and preliminary identification of sites.
Section 2 - Site Evaluation: Detailed evaluation of selected site or
sites.
Section 3 - Project Design: Implementation of the design program within
the site constraints.
In this presentation I have drawn liberally on the work of Larry Marcu, a
facility planner with the University of Maryland at College Park.
Section 1:
SITE SELECTION
BASIC QUESTION: What facilities do we need, what size do we need and where do we
put it? BASIC PREMISE: If site selection is conducted thoroughly and
intelligently, all following efforts are much easier, and therefore the
likelihood of successful and timely implementation of the project is increased.
Cost-Influence Curve: The degree of influence over a project's quality, schedule,
and cost is not constant throughout the design/construction process.
Greatest influence occurs at the project definition phase, and this influence
rapidly decreases as the process continues.
- LOCATION & PROGRAM
- Program the Site
- GOALS AND REQUIREMENTS OF THE ORGANISATION
What is the overall objective of this operation (broad scale)? MFRI is
in the process of preparing a number of training centers throughout the
state of Maryland serving pre-established regions. Some are complete and
operational; others are currently in construction, while others are
still in the pipeline (i.e., one in the early stages of design, and
another currently involved in a site selection process). It is important
to note that this is an iterative process. Facilities typically need to
be revisited over the years to incorporate new technology and just to
conduct necessary maintenance.
- LEVEL OF ACTIVITY, TYPE OF TRAINING, (NUMBER OF PROPS, ETC.)
Will the activity be limited to just a single element - a burn building?
Economics dictate that site use should be maximized; therefore, what
additional uses might be contemplated? In general, MFRI facilities
encompass a burn building, burn pads for training in oil and oil related
fires, extrication pads for training in vehicular accidents,
office/classroom facilities, maintenance facilities, fuel oil
containment and drafting facilities.
MFRI Training Centers generally include:
- a fire fighting structure
- an industrial oil/water separator
- a flammable liquids burn pad (concrete)
- a fire extinguisher training pad (concrete)
- a flammable gas burn pad (gravel)
- an auto extrication/rescue pad (gravel)
- a 10,000 gallon drafting source
- a 10,000 gallon fuel storage tank
- fire hydrants and pump connections
- an instructional/office building
- parking area for 60 cars
- security fence with gates
- roadway system
- exterior lighting for security and night instruction
- a holding pond
- DETERMINATION OF THE POPULATION TO BE SERVED AND GEOGRAPHICS
DETERMINES MACRO-LEVEL SITE LOCATION
- Travel Distance - Ideally, the site should be located in an area
which can be conveniently reached by all who use the facility. (Will
the using population be required to use their own fire apparatus?)
- Geographics - Mountainous areas, major rivers, and/or landforms can
impose undesirable hindrances to access. These hindrances may only be
perceived, but none the less, the "psychological" barrier is
still there.
- Infrastructure - Available roadways, means of access, surrounding
communities, emergency services, etc., must be taken into account.
- Site Identification
- Industrial Locations
- Government Complexes
- Institutional Locations
- Isolated Sites
- PHYSICAL CONSTRAINTS
- General Review of Existing Information
- There is a great deal of information already existing regarding most
sites. This information should be well researched and reviewed prior to
further development. It is extremely important to get out and walk the
site. Items that are obvious when you see them for yourself don't always
come across as well on the maps and in the reference books. Consider the
existing conditions of the site in question and your intended use. Be
critical. Look closely. This is a serious investment.
- Topography
- AVAILABLE INFORMATION
- United States Geological Survey [www.usgs.gov
] - Quad Sheets Department of the Interior, Geological Survey,
Public Affairs: 703.648.4460
This resource will provide basic topographic information [also find
information at www.maptech.com and www.topozone.com
and www.terraserver.com ] , land
contours, etc., including locations of bodies of water roads, railroad
tracks, existing buildings, etc. These sheets are usually prepared at
1" equals 2000 feet with 5' or 10' contour intervals. Detailed
project development will require topographic maps at 1' or 2'
intervals. This information does provide a basic background from which
to start.
- ANALYSIS
- Especially pay attention to land form, topography. Avoid excessively
steep or excessively flat sites. Steep sites generally add to
construction costs due to excessive regrading requirements, utilizing
stepped foundation systems, and retaining walls.
- A flat site generally has poor subsurface hydrology (water movement)
conditions and the development of these sites tends to be costly in
the installation of drainage systems and gravity flow utility systems.
Flat sites often require pumped and/or pressurized utility systems
which can be quite costly and require occasional maintenance. Especially
pertinent to the development of Burn Building Design is the
installation of good site drainage. This can include good berming of
the prop area, perimeter drainage swails, and water runoff collection
points.
- The presence of erosion trenches on the site are evidence of a steep
site which may be difficult to maintain due to excessive overland
water flow.
- Land will help determine site layout by selecting where storm water
and water use containment ponds are located. A general rule of thumb
has the elevation of the site water containment pond lower than the
training facility at a ratio of 1/4" per foot of distance. Storm
water ponds are generally located at the lowest perimeter elevation.
- Zoning
- AVAILABLE INFORMATION
- ANALYSIS
- Zoning (adjacent communities/activities)
- Residential
- Commercial
- Industrial
- Park Land
- Flood Plain
- AVAILABLE INFORMATION
- FEMA (Federal Emergency Management Agency) maps - Flood plain
[www.fema.gov/maps/ and www.fema.gov/mit/tsch
] These maps provide site information regarding areas which may be
within the 100 year flood and flood hazard areas.
- ANALYSIS
- There are regulations regarding the development of territory within
the 100 year flood area. Generally, development within the flood plain
is strongly discouraged, especially elements which will alter the
contour of the flood plain. Some elements such as parking lots and
agricultural development may be permitted.
- If a need for development within the 100 year flood plain is felt
justified, co-ordination with the local governmental agency having
jurisdiction must be conducted. In the state of Maryland, the
Department of Natural Resources, Water Resource Administration, is the
governing body. They can either grant or deny permission for
development.
- If permission is granted, special conditions on construction will
probably be required. For instance, the finished floor elevation and
access ways of any structure within the flood plain must be 1' higher
than the ultimate flood elevation at that location. These special
conditions generally increase the cost of the project. Also, public
notice is required to inform neighboring properties of the potential
increase in the flood elevation in the area due to your action.
- Wetlands
- AVAILABLE INFORMATION
- Natural Resources Conservation Service, United States
Department of Agriculture, [ www.usda.gov
] Washington, D.C. This agency provides Soil Survey Maps which
provide general information regarding soil types and conditions, and
information regarding substrata conditions.
- State of Maryland, Department of Natural Resources (DNR) [ www.dnr.state.md.us
], Water Resource Administration. DNR's Water Resource
Administration can provide information regarding the potential of
the existence of wetlands within a site.
- ANALYSIS
- Three conditions are determinants of the existence
of wetlands: soil type, flora and fauna (vegetation), and the
presence of water.
- The presence of standing surface water often indicates a high
water table, poor site drainage, or the presence of soils with
limited filtration ability.
- Basic rule - DON'T BUILD ON WETLANDS. Especially something like a
fire training center.
- DNR requires you to identify five other sites which you have
investigated and why none of these meet your needs before they will
even consider your petition for building in the wetlands.
- If you must build in wetlands, mitigation will be required.
Mitigation requires a one-to-one replacement, acre for acre, and a
two-to-one replacement if the wetland is forested. Creating wetlands
is not the world's easiest effort. Finding property that the owner
is willing to have turned into wetlands is the first obstacle.
- Hazardous Sites
- AVAILABLE INFORMATION
- Hazardous Site Listings - Monitoring lists of the
Environmental Protection Agency [ www.epa.gov
] and State Department of the Environment [ www.mde.state.md.us
]. These agencies maintain lists of sites which have been identified
as hazardous waste disposal sites. [ Also find information at "EnviroMapper"
www.maps.epa.gov/environmapper
].
- ANALYSIS
- Whether or not the site is on these lists, precautions should be
taken and soil sampling should be conducted to establish baseline
conditions. These conditions should be submitted to the State
Department of Environment for analysis. This is especially important
if the site has previously been used as a fire training site, etc.
- Be aware of the activities previously conducted on the site. Request
and environmental history of activity conducted at the site. Old deeds
and tax maps may help with this investigation.
- Under the Federal "Superfund" legislation, the lessee of
the site could potentially be responsible for costs associated with
the clean-up of the site if hazardous wastes are found there-even
though the lessee was not responsible for dumping the wastes there!
These costs could easily run into the tens of millions of dollars.
- NOAA
- AVAILABLE INFORMATION [ www.noaa.gov ]
- ANALYSIS
- Predominant wind direction will help locate the burn building and
burn pads such that those facilities are down wind of other
facilities on site and such that there is a buffer zone between them
and off site structures. Sound is also carried by wind. This is of
lesser concern, though noise is a component of fire training. Take
note of prevailing wind directions during walk through. Adjacent
properties and/or facilities downwind may be affected by the smoke
and fumes created within your site. Be conscious of your neighbors.
- Bureau of Land Management
- U. S. Fish & Wildlife Endangered Species
- AVAILABLE INFORMATION [ www.fws.gov ]
- Threatened and endangered species system (TESS) [ www.fws.gov/webpage
] provides links to site maps, state lists, plants, animals, etc.
- ANALYSIS
- FAA Height Restrictions
- National Park Service
- AVAILABLE INFORMATION [ www.nps.gov ]
- ANALYSIS
- Among the most prominent requirements needing attention are:
Similar to a wetlands request, you must provide evidence that you
have investigated 5 to 10 alternate sites. The rationale for why
each of these sites cannot meet your requirements must also be
presented. This evaluation of all practical alternatives to the
requested conversion must be investigated and rejected on a sound
basis. This rationale must also be presented to and supported by the
National Park Service for further pursuit of the property to occur.
- You must develop a list of potential alternative sites for
review . DNR will support this effort by identifying any sites
of which they may become aware which may meet your needs. In
assisting this effort, representatives of DNR's Program Open Space [
www.dnr.state.md.us/pos.html
]indicated they would require approximately six weeks to conduct a
thorough search of potential alternate properties within the region.
- Any proposed replacement property identified for substitution
must be of equal or greater fair market value, and it must be of
equal or greater acreage per DNR's requirements. Fair market
value of the existing parcel, and of the parcel proposed for
replacement must be established by a private appraisal at the
University's expense. This replacement property cannot already be
within the State's or the Federal Parks property inventory.
- The property proposed for replacement must be of reasonably
equivalent usefulness and location (within the same political
jurisdiction) as that being converted. If replacement property is
identified which has ecological, environmental, or recreational
significance, the need for adjacency may be waived at the discretion
of DNR and/or the National Park Service.
- Guidelines involving environmental evaluation must be completed
and reviewed by appropriate federal and state agencies. The
University's Engineering and Architectural Services will provide DNR
with a copy of an Environmental Assessment Form prepared for another
MFRI Training Center. This will familiarize DNR with a typical MFRI
training facility. Based upon this description, DNR can determine if
a formal Environmental Impact Statement (EIS) will be required. If
an EIS is required, DNR will prepare it and coordinate its
distribution, review, and approval.
- National or Historic Trust
- AVAILABLE INFORMATION
- National Historic Register of Historic Places [ www.cr.nps.gov/nr/research/nris.htm
] provides an extensive database document for 65,000 historic
places.
- Lists from the National, State, or Local Historic Trusts.
- ANALYSIS
- Contact the Historic Trust and ask if the site may be on their
lists or if a study is required. Historical or archaeological sites
are not always apparent. There may be Native American burial
grounds, etc. under the surface. The old shed on your site which
doesn't look important may actually be of historic importance. This
site may require an Archaeological Survey or building investigation.
- Accessibility
- AVAILABLE INFORMATION
- Road and Local Infrastructure information from the State and Local
Jurisdiction.
- ANALYSIS
- Roadway and Accessibility to and within your site are vital.
Remember, you are planning for vehicles often in excess of 60,000
pounds.
- Easements
- AVAILABLE INFORMATION
- Deeds, Information from Utility Companies.
- ANALYSIS
- Site easements should be established prior to initiating any
design whatsoever. Easements can be classified into two categories.
One in which people, vehicles, etc., have the right to enter and/or
pass through the site, or the other where utilities such as gas,
electrical, water, etc., exist on or under the site. All easements
should clearly identify what is and is not permitted. Overhead high
voltage electrical lines may allow roadways to pass underneath, but
because of extreme magnetic fields, no structure for habitation
should be constructed within 500 feet.
- Underground obstructions should be located in advance of any site
plan development, if at all possible. Any prior site drawings or
deed drawings may indicate prior uses.
- UTILITIES
- Electricity
- AVAILABLE INFORMATION
- ANALYSIS
- Electricity and available power for equipment operation, etc.
- Electricity may be required to heat certain spaces.
- Is electric service available within a reasonable distance?
- Telephone
- AVAILABLE INFORMATION
- ANALYSIS
- Telephone and/or other methods of communication, the need for
emergency services, etc.
- Is telephone service likely to be available at a reasonable cost?
- Gas
- AVAILABLE INFORMATION
- ANALYSIS
- Gas may be required to heat certain spaces.
- Propane is another viable choice.
- Sewer
- AVAILABLE INFORMATION
- Local information on sewer system.
- ANALYSIS
- Historic information from local health department.
- Soils survey.
- Water
- AVAILABLE INFORMATION
- ANALYSIS
- Water, both potable and fire training water. These training
centers tend to use excessive amounts of water. If your supply is
provided from a local well system, unrestricted training activity
may quickly drain the tapped aquifer. This tends to upset the
neighbors.
- Storm Drainage
- AVAILABLE INFORMATION
- ANALYSIS
- Oil Water Separator
- AVAILABLE INFORMATION
- ANALYSIS
- Land can have an effect on the selection and successful use of
an oil/water separator. Certain separator types operate via
gravity feed and require a greater slope.
- The general location of the oil/water separator is down from the
use facility, but up hill from the containment pond.
Section 2:
SITE EVALUATION
- PLANNING & ZONING
- Program Layout
- GENERAL LAYOUT
- An organizational concept is essential to provide efficient
and safe usage of the site. Two basic organizations come to
mind. One is the nodal concept which is geared towards one
very important activity with lesser important support
activities surrounding it. This concept does not prove to be
efficient when there are multiple, equally important
facilities on the site, as duplication of support facilities
would occur.
- The MFRI facilities, having several equally important
functions, uses a spine concept organization. This is much
like a double loaded corridor in a building. The corridor in
our organization is the main street with different functions
spaced on both sides. This organization is excellent for
expanding the facilities either by providing more connection
points or by extending the spine.
- The location of the facility layout can be affected by many
factors. The roadway accessing the site offers significant
potential if it parallels the longest boundary line than if it
dead ends into the property. The dead end roadway forces a
connection to the facility at that location. Adjustments to
the proper internal organization may require added internal
roadways. The dead end roadway may require significant site
modification for visual surveillance by the local security
force. The parallel access road allows connection at various
points which more easily can support the internal
organization. The parallel road allows more locations for
through sight lines thereby allowing better security.
- SPECIAL LAYOUT REQUIREMENTS
- The amount of land that is used for services versus the
amount cleared is the result of many factors. With MFRI, the
overall design encompasses more facilities than the burn
building itself. This will also likely be the case with any
facility even though it may be limited in scope to only a burn
building.
- The active facilities at MFRI constitute two burn pads for
various types of oil fires and extinguishing techniques, two
extrication pads for techniques in saving lives in vehicular
accidents and one 2½-story burn building. One must determine
what kinds of support facilities are required to allow the
designed facilities to function.
- Accessing the facilities is important. What kinds of
apparatus will be accessing the facilities should be
determined. In our burn building design, we require
that the largest apparatus made have free access to the
building and be utilized in the fighting of the fire. This
necessitated that the access road to the burn building
accommodate two way traffic for vehicles passing one another.
The minimum width of the access road required 24'. Turning
radii at intersections required 50' for the inside radius.
Operating space around the burn building required clearance of
50' from any one point of the building. This facilitates
vehicles passing one another and provides reasonable distance
from the building during burn evolutions, simulating actual
fire conditions. Our 45' square burn building required a
clearing of 150' in diameter for apparatus access.
- The access to the burn pads is primarily designed for
foot access and delivery of fire fighting equipment by way of
small truck. The access road in this case is 12' wide with a
turning radius of no less than 15' on the inside. The burn
pads are a minimum of 50' square in order to accommodate a 6'
x 6' burn pan. The extraction pads require similar access as
the burn pads are sized the same.
- Support facilities have to be defined. First and
foremost is parking. How many people will be attending these
activities and what kind of vehicles will be brought to the
site? The most efficient parking is 90 degree with two way
traffic aisles. This, however, is not necessarily the most
chosen because of ease of parking and safety. MFRI at present
provides automobile parking for 60. Added pull offs and 24'
road widths provide for fire apparatus parking.
- Storage facilities must be determined. What kinds of
materials are required to be stored on site for fire fighting,
for burn materials, for maintenance of the site, lawn mowers,
etc.? What kind of access is required for vehicles?
- Garbage collection must be planned. MFRI has
designated two pick up points for dumpsters. One near the burn
facilities and one near the office facilities. Both locations
have access designed for the garbage collection vehicle and
turn round.
- What kind of support facilities are required for safety,
health, and general instruction prior to activity involvement?
MFRI provides an office building which contains toilets,
offices, and instructional spaces.
- Buffer zones around each of the facilities must be
determined as these add or reduce overall site clearing. Our
burn pads are greatly affected by the required buffer zone. We
have found that extinguishing the fuel oil flames
significantly alters the direction of the flame such that it
goes beyond the outer perimeter of the 50' burn pad by 10' to
15'. This area cannot contain any materials that can burn. Our
50' square pad must have a clearing of 90' square. Overlaps
can occur with burn pads, provided that usage can be
staggered.
- General construction clearing also must be
recommended as a construction buffer zone. If the size of a
facility is designed to be 40' x 40', it is most likely the
clearing will be a minimum 60' x 60' in order to accommodate
construction vehicles. Under special occasions, hand labor can
reduce clearing but at much added expense.
- Sight lines both within the facility for operational
control and safety, and from without the facility for
security, can alter clearing. It is important that activities
be able to be observed from within the site from defined
vantage points. This provides overall control and coordination
of the activities. The MFRI sites, for the most part, have
direct vision from the office building to each of activity
centers and the main entrance. The perimeter site fencing
requires a cleared buffer zone about 8' in order to easily
access the fence for security breaches. Depending upon local
security "drive by," there is need for sight lines
into the site to locations likely needing protection, i.e.
storage, office, burn buildings, and wet ponds. It is also
very likely that sight lines will be restricted from the
outside viewing which could disrupt traffic patterns of
passing vehicles or cause undue interest or alarm from nearby
residences.
- Zoning Issues
- Set backs and easements can greatly affect site configuration.
The site layout should conform to county set back regulations
either as zoned or as determined by the county engineer. These
set backs can predict future adjacencies and/or access roads. If
possible, keep the active functions, burn pads, burn building,
and their inherent buffer zones, well within the set back
limitations.
- ENGINEERING
- Environmental Impact
- ENVIRONMENTAL ASSESSMENT
- An Environmental Assessment Form must be filled out and
submitted to the proper governing bodies.
- An environmental evaluation must be completed and reviewed by
the appropriate federal and state agencies.
- This will familiarize DNR with the activities which will occur
during the operation of a typical fire training facility. Based
upon this description, the DNR or similar state agency can
determine if a formal EIS will be required.
- ENVIRONMENTAL IMPACT STATEMENT (EIS)
- If an EIS is required, the state governing authority will
review and make a determination regarding the significance of
this impact and ultimate disposition. If no significant
impact is found based on intervention and further proposals
for site development, public notice must be listed in the
local newspapers for thirty days. Once the Environmental
Assessment has cleared the public domain, design may begin.
- Preparation and acceptance of an EIS can take up to a year!
- Forest Conservation
- Although not the initial or primary concern in site selection, one
must consider the level of forestation which composes a site.
Utilization of forested areas as a buffer zone is extremely
desirable. However, elimination of forested areas now requires
coordination through DNR.
- Section 1 of the Forest Conservation Act (Chap. 255, Laws of MD
1991) holds the provisions of the Forest Conservation Program [ www.dnr.state.md.us.forests/landplanning/fca.html
], including conservation thresholds, afforestation, and
reforestation standards, as well as requirements for forest stand
delineation and forest conservation plans. The Program provides for
the applicability of its requirements to any public or private
subdivision plan or application for a grading or sediment control
permit by any person, including a unit of state or local government,
on areas 40,000 square feet or more. These provisions are codified
as Natural Resources Article, sec. 5-1601 through 5-1613, Annotated
Code of Maryland.
- Section 2 of the Act amends the Natural Resources Article, Sec.
5-103 (the "Reforestation Act"). Section 5-103 requires
units of the State government and persons using State funding for
construction activities to minimize the cutting or clearing of trees
and to contribute up to $500 per acre to a Reforestation Fund if the
area cut or cleared is one acre or more. Section 2 amends the
Section 5-103 by increasing the reforestation fee to 10 cents per
square foot of the area required to be replanted. For any publicly
financed construction activity, the requirements of the Forest
Conservation Program apply.
- You will likely be required to develop all projects in accordance
with the Forest Conservation Act and its pertinent Regulations,
1991. A thorough review of the statute, the regulations, and the
Forest Conservation Manual are necessary for a complete
understanding of the law, and the Consultant's subsequent
responsibilities. These responsibilities can typically be obtained
from your state's natural resources department.
- Reforestation within the site can occur in areas which are open to
view but should be restricted to areas cleared for construction
access beyond the required footprint.
- Additional clearing occurs due to the requirements on controlling
site water. The burn building pad is extended by a 6' diameter in
order to direct water away from the burn building and into a swale
which in turn goes into a holding pond. The burn pads, because of
their fuel source, evacuate water by way of a center drain towards
the oil/water separator. The pathways of water used in fighting
fires have specialized paths which are in addition to the cleared
paths for normal storm water management.
- Clearing for storm water management will come from requirements of
swales, infiltration ponds, detention ponds, and/or retention ponds.
The area required for these management facilities varies with each
site.
- Topography
- Underground obstructions should be located in advance of any site
plan development, if at all possible. Any prior site drawings or deed
drawings may indicate prior uses. If there is any possibility of the
existence of underground obstructions such as old footings from
previous buildings or vaults from septic systems, do not hesitate to
investigate. The investigation can take the form of pits and trenches.
Soil borings are not a reliable investigative tool for finding
underground obstructions.
- Wetlands
- Geotechnical
- Geotechnical information is extremely important in selecting
locations within the site for the different functions. Soil borings
are an important way of obtaining geotechnic information. Through the
borings it is possible to determine if the water table will cause
design conflicts with underground tanks and/or building footings. If
possible, this should be avoided as we have experienced added
construction costs for dewatering. The soil types will indicate
bearing capacity. This is significant not only to determine whether
the building foundation is spread footings, grade beams, or pilings,
but also to determine the design of the roadway to support
60,000-70,000 pound vehicles.
- Security
- Ease of surveillance is generally a consideration with regard to
these types of facilities. Placing the site down a long dead end road
may not be appropriate as it may permit unwanted activities to occur
within the site.
- Open fencing versus closed fencing/walls (visual access versus
seclusion).
- Night lighting throughout the state.
- If you have easy access, excellent, nearby support facilities, you
will not be alone. Activities occurring at these training facilities
when they are operational are not casual recreational activities.
Public access must be controlled. One must therefore balance out these
requirements, and make reasonable concessions between accessibility
and controllability.
- UTILITIES
- Electricity (Determine routing and cost)
- Telephone (Determine routing and cost)
- Gas (Determine routing and cost)
- Sewer (Perc Tests)
- Our MFRI facilities encompass sanitary facilities. Within the
Washington, DC area, Prince George's County, and Montgomery County
the Washington Suburban Sanitary Commission (WSSC) reviews
drawings for all sanitary connections and approves designs for
permits. Our design standards for projects, in general, are in
conformance to WSSC standards even though the project is outside
of the local jurisdiction. Variation from WSSC standards is
performed to accommodate local review for particular requirements.
The local districts will review any and all connections to sewage
systems both in drawing form and actual connection. It is best to
keep them informed from the onset of the project, through the
county engineer.
- If reliance on a septic system is required, it is important to
work with the county as they normally perform perc tests and
verify capacity of soil which can be translated into quantities of
people who will be using the facility on a daily, weekly, or peak
period basis. It is important to coordinate this information with
that programmed for the facility.
- Connections to existing sewer systems can be broken down into
two basic types: forced main which has the main sewer line
under pressure as the elevation of the pipe run requires a pump
station pumping sludge up a hill, or a gravity main which
uses gravity as the force moving the sludge.
- With the forced main, it is required that an on site sanitary
pump and sundry back flow preventers be constructed and installed.
This feature generally adds $7,000 to $10,000 over a connection to
a gravity main. Sanitary pumps are generally not required when
connecting to a gravity main except when the slope of the land and
the fall of the pipe from the source prevent a continuous gravity
flow to the main. The location of the sanitary facilities within
the site organization can be determined in part by the need and
expense for a sanitary pump.
- Water
- Access to water is a very important part of our facility. It is
important to calculate the required overall usage of water for the
facility and determine what portion is used for fire fighting and
what portion is used for human consumption and general use. This
calculation opens up possibilities as to what sources of water may
be used and what must be available from the lexicon of wells,
creeks, ponds, and municipal water supplies. Accessing non
municipal water comes under the scrutiny of the DNR and the local
county Health Department. Should we determine that a well is
required, the state provides a Water Appropriation and Use Permit.
Both permits are required in Maryland. It is possible to drill two
wells, one for potable water and the other for fighting fires
whose quality is less than that required for human consumption.
- Adjacent streams can act as a supply of water for fire training
either similar to that noted for the non-potable well water or as
a direct supply by means of a drafting apparatus. The DNR
calculates a flow-by for the stream. This determines the limits on
water removed from the stream. This too requires a Water
Appropriation and Use Permit.
- Accessing municipal water supplies will require review by the
county engineer in order to determine adequacy of supply versus
need. The present MFRI Regional Training Centers anticipate using
1,500 gallons per minute at 20 psi with a daily maximum of 30,000
gallons and weekly maximum of 90,000 gallons.
- The water usage at our Western Maryland site will be metered and
paid for by the institute. In working with the county engineer, it
was determined that a dual metering system - one for domestic
water, low flow, and one for fire training, high flow - could save
between $8,000 and $15,000 over a single metering system
accommodating both high and low volume.
Section 3:
PROJECT DESIGN: Implementation of the design?
- SITE & STRUCTURES
- Site Grading
- The location of activity pads, burn pads, burn building, and
access routes should be in concert with the percentage of the
slope of the land. As the pad is so large for the burn building,
it is advisable to locate the facility on land which has a slope
no greater than 5%, preferably on a knoll to drain the water
from the center towards the outside.
- Burn pads also can easily function on a slope of 5% or less.
Slope greater than this would require extensive contouring.
Slope for access by fire apparatus should not exceed 10% and
great care should be taken during design to transition the
clearance and could bottom out.
- Storm Water Management
- The soil types will indicate drainage characteristics. This is
important in determining types of storm water management systems
from infiltration to retention ponds.
- Site water management requires reviews and permitting from the
Maryland Department of the Environment for Sediment and Erosion
Control, Storm Water Management and Water Discharge from Site.
- Soil Erosion & Sediment Control
- The sediment and erosion control plan is concerned with
soil going beyond the boundaries of the property and eventually
altering streams and rivers. The plan impacts the site primarily
in a temporary manner as selection of the construction staging
area, stabilized construction entrance, and topsoil/fill storage
areas are all removed prior to project completion. These areas
and the disturbed portions of the site are protected by
siltation fencing and siltation traps. Review of this plan is
frequently submitted with the storm water management plan, but
it is a separate review and permit. This permit must be obtained
prior to any construction or modification of the site, and the
approved drawings must be on site at all times. The present
approximate review time in the State of Maryland is 12 weeks.
- The basic concept for storm water management is to
maintain the status quo of the quality and quantity of the water
runoff from the property prior to construction and to control
down stream flooding and erosion.
- There are three basic methods used for controlling the quantity
and quality of storm water run off: infiltration detention
(dry pond) and retention (wet pond) ponds. These ponds may
suffice individually or in combination with one another.
- Waivers may be obtained for having to build these
facilities by way of comparative calculations for storm water
run off from the existing land use to the proposed land use. In
our Western Maryland site, the previous use was a Celenese plant
with virtual coverage of the entire site with impervious
materials. Our modifications to the site for the burn pads, burn
building and associated roadways did not negatively impact the
previous use, and we were permitted a storm water waiver. This
saved several thousand dollars on storm water management ponds.
Conversely, our Aberdeen site was equal to virgin land and
required three detention ponds and controlled outlets at a cost
of five to eight thousand dollars each.
- Each of the methods for storm water management have rationale
and advantages to suit the situation. The infiltration ponds
primary purpose is to control the quality of water that leaves
the site. This "pond" may occur in different forms. It
may occur as a dry well which catches the sediment and water
from the first half inch of rain water. The sediment is
contained and the water migrates through the soil. It may occur
as pavement, brick, stone or even special bituminous pavement,
which allows penetration of water through to the soil and
containment of sediment. The infiltration pond is frequently the
least expensive of storm water management structures as this
type of control is allowed to deal with portions of a site which
have a storm water quantity waiver but not a quality waiver.
- The detention pond is used for quantity control whereby
it reduces peak discharges. All the water which is funnelled
into this pond leaves the pond, but over an extended period of
time. This is frequently called a dry pond.
- A deviation of the detention pond is an extended detention
pond which holds the water for a longer period of time thereby
allowing sediment to filter to the bottom. This type of pond
controls both quality and quantity of run off. The sizing of the
detention pond or ponds is based on a calculation against the
entire site area. Thus the detention ponds and the retention
ponds are generally a more expensive way of required storm water
management.
- Sewer
- Soil information will also help to identify the possible use
of a septic system.
- Oil/Water Separator
- Another permit required for site water management is a discharge
permit. This permit specifically concerns burn building and
related structures. This permit is necessary for any point source
of waste water being discharged into the waters of the state.
Waste water is defined as any water that has been chemically
altered through its use. Waters of the state include ground water
as well as all surface water. The state of Maryland also requires
a permit for discharging water which has not been chemically
altered if the monthly average is greater than 10,000 gallons per
day. This permit is provided by the Maryland Department of
Environment's Hazardous and Solid Waste Section.
- As Maryland Fire and Rescue Institute's water usage is
calculated to exceed the average water usage, we have designed
zones and areas of containment in which the water can be tested
before release from the site.
- Fire training which utilizes fuel oil fires requires all used
liquids to enter a surge tank which filters out most of the solids
washed down through the spray of the water. From the surge tank,
the liquids continue to flow into an oil water separator which
removes all oil and oil products to Coast Guard standards - 15
parts per million. The oil is stored and made ready for reuse. The
remaining liquid, water, travels through a final oil sweep and
testing area for verification of Coast Guard compliance. The water
continues to a holding pond which is fitted with an aerator to
reduce the chlorine gas contained within the water supplied by the
Municipal Water Supply. Water used for non fuel oil fires has
large particles filtered by site trenches, then proceeds to the
holding pond. The holding pond contains a testing pit to determine
acceptable standards for discharge. This water then proceeds to
the storm water system and mixes with storm water where it may
again be tested just prior to leaving the site. By having these
containment zones, and visual as well as testing check points, we
have built safeguards into the discharge system.
- Holding Pond
- CODES
- General
- As we are a state agency, University of Maryland Engineering and
Architectural Services in support of a state agency, MFRI, we are
not subject to obtain a building permit in the technical sense.
We, however, try to function as an exemplar in performing building
code (BOCA code), handicapped accessibility code (ANSI A117.1),
fire code (NFPA 101), and environmental safety reviews in house.
We are, however, subject to external reviews by other state
agencies concerned with the environment, and health and safety of
our structures.
- Our overall MFRI facilities are in full compliance with all
codes and state regulations, the same as those encompassing the
private sector. The design of a burn building in particular proves
to be a special case not specifically defined in any applicable
code. For this reason, we have made a determination that the burn
building is not a building at all but a prop not unlike
those used in Hollywood for stage settings.
- Building Code (BOCA in Maryland)
- With this definition there is selective application of NFPA
101, BOCA code, and ANSI A117.1. These codes now function as
guidelines to be used in coordination with the simulation
activities designed into the burn "structure".
Conditions concerning ingress and egress - stair width dimensions,
riser-tread dimensions, hall widths, and number of egress and
ingress points may justifiably fall outside code regulations
because of teaching intent. Locations for siamese connections and
stand pipes may be within code but the actual connection to a
water source may be temporary and intermittent. Ceiling heights
may be altered to create smoke pockets rather than to dissipate
smoke.
- The opposite also comes into play where we have found that code
requirements are not sufficient. Floor loadings, wall and ceiling
ratings, railing and stair loadings were increased to accommodate
the specialized activities.
- Life Safety Code (NFPA in Maryland)
- ANSI
- ADA
- APPROVALS
- Electricity
- PERMITS
- Building
- Water
- Sewer
- Plumbing
- Electrical
- Flood Plain Development
- Permit is needed from FEMA to prove that building will not
impact the floor plan (flood plain levels) and that no habitable
space will be below the flood plain level.
- Wetland Development & Mitigation
- National Park Service
- Permit for Open Burning
- Forest Conservation: Reforestation / Afforestation
- Environmental Impact Statement
- Storm Water Management
- Soil Erosion & Sediment Control
- Discharge Permit
Other information may be obtained from the U. S. Department of the Interior
at www.doi.gov/doichart.html.
This information provides you with some basic considerations for site
selection and development.