EROSION AND SEDIMENTATION CONTROL
PLAN
3375 Mitchell Lane Remodel
3375 Mitchell Lane
Boulder, CO 80301
University Corporation for Atmospheric Research
(Project Owner)
Prepared by:
GH Phipps Construction Company
5995 Greenwood Plaza Blvd. Ste. 100
Greenwood Village, CO 80111-4710
(Controlling Operator)
SWMP Administrator:
Mike Liffick, Project Superintendent
(303) 901-2860 cell
Decemeber 13, 2010
3375 Mitchell Lane Remodel
Erosion and Sedimentation Control Plan (ESC Plan)
Page 1
EROSION AND SEDIMENTATION CONTROL PLAN (ESCP)
Cover Sheet
(THIS DOCUMENT TO REMAIN ON SITE)
SECTIONS OF ESCP INCLUDED:
1.0
2.0
3.0
4.0
5.0
6.0
Site Description
1.1 Project Description
1.2 Site Location
1.3 Description of Construction Activities
1.4 Sequence of Events
1.5 Site / Disturbance Area
1.6 Site Soil Data
1.7 Existing Vegetation
1.8 Non-Stormwater Discharge
1.9 Receiving Waters
1.10 SWMP Administrator
Site Map
Stormwater Management Controls
3.1 Potential Pollutants
3.2 Best Management Practices (BMPs) for Stormwater Pollution Prevention
3.2.1 Erosion and Sediment Controls
3.2.2 Structural Practices
3.2.3 Non-Structural Practices
3.2.4 Phased Implementation of BMPs
3.3 Other Controls
TABLE OF BMPS IMPLEMENTED PER THE PROJECT PHASING
3.4 Material Handling and Spill Prevention
3.4.1 Good Housekeeping
3.4.2 Hazardous Products
3.4.3 Product Specific Practices
3.4.4 Spill Control Practices
Long-term Stormwater Management
Inspection and Maintenance
5.1 Minimum Inspection Schedule
5.2 Inspections
5.3 Record Keeping
Statement of Certification
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Erosion and Sedimentation Control Plan (ESC Plan)
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INTRODUCTION
This stormwater management plan (SWMP) or erosion and sedimentation control plan (ESCP)
has been prepared for the UCAR FLA Remodel Project (the project). The goal of the SWMP is
to identify potential sources of pollution that may contribute pollutants to stormwater, and
identify Best Management Practices (BMPs) that, when implemented, will reduce or eliminate
negative impacts to water quality. A Low Impact Grading Erosion and Sediment Control plan
(GESC) has been prepared for this project and has been approved by Boulder County. The
GESC plan is referenced in many of the following sections and will be included as part of the
overall SWMP for this project.
1.0 SITE DESCRIPTION
1.1 Project Description: (I.B.1, I.C.1)
The proposed UCAR FLA Remodel project consists of a 53,000 square foot remodel and
retrofit of an existing building slated to receive a LEED rating of Gold and possibly
Platinum. This project will be retrofitted in order to be a “fully” green building with
advanced energy efficiency technologies, including a PV Solar array, a geothermal (ground
source) heating and cooling exchange system, comfortable offices, green natural lighting,
spacious break areas, indoor bike storage and the latest architectural finishes to provide a
great work environment for the end users. A few of the exterior improvements to this project
include: additional bike storage, designated hybrid/smart car parking spots, green friendly
landscaping, high efficiency sprinkler system and a designated smoking area area.
1.2 Site Location: (See also the Vicinity Map)
The project is located in the City of Boulder, Boulder County at: 3375 Mitchell Lane,
Boulder, Colorado 80301, near the intersection of Mitchell Lane and 47th Street. Throughout
this report, the site will also be referred to as “the project”.
1.3 Description of Construction Activities: (I.C.1.a)
The proposed project consists of the demolition of existing interiors and mechanical
electrical systems, demolition of the existing asphalt and retrofit of all demolished systems.
Utilities will also be installed within the project area which will require trenching to occur to
the north, east and south of the building.
Soil disturbing activities will include: demolition, asphalt removal, installing a stabilized
construction entrance, installing perimeter and other erosion and sediment controls; finish
grading; installation of underground utilities; installing a new sprinkler system; paving of
parking areas; and preparation for final seeding and mulching.
Upon completion, the project will consist of a finished building, paved parking, surrounding
sidewalk, and native grass seeded areas as well as some sprinkled sod areas.
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1.4 Sequence of Events: (I.C.1.b)
Construction for all work associated with the project will begin on or about the end of
December, 2010 and continue through the end of August, 2011. An updated schedule of
construction activities with approximate calendar dates will be kept in the SWMP
Binder under the section marked “Construction Milestone Schedule”.
The following is a general list of the major construction activities to be performed in order of
occurrence. For a more detailed list of activities see the Project Schedule in the SWMP
Inspection and Log System Binder.
1. Site Preparation: Mark project disturbance limitations, mobilize office trailers, and
installation of initial sediment control measures
2. Schedule and attend pre Construction Inspections
3. Building interior and asphalt demolition
4. Geothermal boring and installation
5. Site Prep: over lot grading.
6. Utility Construction: installation of utilities, backfill of trenches, stabilization of disturbed
areas.
7. Building Interior: rough-in, interior finishes.
8. Finish grading
9. Site Concrete Construction: installation of the remaining curb, gutter and sidewalk
10. Paving: completion of asphalt paving.
11. Site sprinkler installation.
12. Final stabilization: seeding and mulching, removal of all temporary BMPs upon sufficient
vegetative cover establishment
1.5 Site / Disturbance Area: (I.C.1.c)
The full build out of the project contains approximately 3.24 acres, of which 2.0 acres will be
disturbed. The total area of the project site is approximately 3.24 acres. Reference the site
map (C3.01 and ASI-011r1) for current limits of construction as well as disturbed /
undisturbed sections.
1.6 Site Soil Data: (I.C.1.d)
Soils encountered at the site are described as 3 to 6 feet of clayey fill underlain by medium to
very dense, silty, clayey sand with gravel and siltstone/claystone bedrock. Given these soil
conditions, it is estimated that the propensity for erosion is moderate. See the Geotechnical
Engineering report in the SWMP Binder for additional details regarding soil conditions at the
site. Accordingly, this plan will include the combined use of both structural and nonstructural BMPs to minimize potential erosive impacts and associated sediment migration
from the site during construction.
Due to the existing structures remaining in place, the post-project runoff coefficients and
drainage characteristics will remain relatively unchanged.
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1.7 Existing Vegetation: (I.C.1.e)
The existing site vegetation consists of prairie grasses and weeds, covering approximately
3/4 of the site surface. The approximate vegetative density within this area is estimated at
60%. The remainder of the site is covered with existing structures and asphalt paving.
1.8 Non-Stormwater Discharge: (I.C.1.g)
Other probable non-stormwater discharges for the project will include concrete washout,
water from fugitive dust dewatering, pavement wash water (where no spill or leak of toxic or
hazardous material have occurred), and landscape irrigation return flow. Each of the above
mentioned sources will be controlled with appropriate BMPs when and if it is necessary to
insure proper treatment, none of which will be allowed to discharge from the site during
construction.
1.9 Receiving Waters: (I.C.1.h)
The topography across the site is nearly level, with a retention pond located on the east side.
(Reference ASI-011r1 and C3.01 for topography and existing contours on the site).
1.10 SWMP Administrator: (I.C.3.a)
Mike Liffick, the Project Superintendent, shall be the designated SWMP administrator for the
project. It will be his responsibility to manage and maintain the SWMP and to insure its
adequacy at all times to effectively manage potential stormwater pollutants throughout the
course of construction.
It is important for this document and the site map to remain consistent with current pollution
sources and Best Management Practices (BMPs) used by the project team. In the event
conditions at the site change, pollutant sources change, or BMPs change or need to be added,
this plan and the GESC shall be updated accordingly by the SWMP Administrator or His
assigns.
Mike Liffick can be reached at: 303-901-2860 (cell) or 303-571-5377 (office).
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2.0 SITE MAP (SEE ATTACHED PLANS – GESC SHEETS
See attached C3.01 Grading Erosion Control Plan, Detail 4/C4.21 and 5/C4.21.
3.0 STORMWATER MANAGEMENT CONTROLS
3.1 Potential Pollutants*: (I.B.2, I.C.1.f, I.C.3.b)
Potential pollution sources for this site include the following: sediment-laden stormwater
runoff from disturbed areas, sediment tracked by construction equipment onto paved
surfaces, contaminated soils due to spills or accidental leaks, fuel spills from loading and
unloading of construction materials and equipment (fueling of equipment and storage of fuel
will not be allowed on site), airborne dust from grading or demolition activities, construction
site waste (dumpsters), lubricants and adhesives for utility installation, adhesives, paints,
plaster, and other interior finish materials, cleaning solvents, liquid wastes from concrete and
or tool washing activities, asphalt material from paving operation, effluent from portable
toilet units, and nitrates / nitrites from soil amendments (see site map for locations of
potential pollutant sources and associated BMPs). There is no anticipated on-site asphalt or
concrete batch plants associated with this project.
Portable toilets shall be located on the jobsite where they can be accessed for regular service
and they will be anchored to prevent the possibility of accidental tipping. Vehicle tracking
control will include stabilized access points, minimizing traffic to the maximum extent
possible during wet conditions and sweeping or scraping paved sections (public or private)
when necessary. These vehicle tracking controls will be maintained in good, effective
condition during any periods of construction activity.
*Reference section 3.2.4 for an itemized list of pollutant sources and selected BMPs
anticipated for this project.
3.2 Best Management Practices (BMPs) for Stormwater Pollution Prevention: (I.C.3.c)
3.2.1 Erosion and Sediment Controls:
Appropriate BMPs shall be installed before earthwork begins (where possible).
Locations for specific BMPs are shown on the site map. The temporary measures to
be used in the control of sediment and stormwater from the site during construction are:
a. Follow all local, state and federal regulations pertaining to stormwater control.
b. Silt fence may be installed, where appropriate, around areas of construction to
intercept and detain small amounts of sediment in order to reduce the amount of
sediment in runoff leaving the site.
c. Inlet protection may be used as necessary along Mitchell Lane as a secondary BMP to
treat runoff.
d. Vehicle tracking control pads shall be placed at the access / exit points and shall be
maintained throughout construction.
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e. All construction debris / trash shall be picked up and disposed of in proper containers
and hauled off of the site as necessary.
f. Concrete washout facilities shall be placed on site as dictated by the contractor prior
to pouring concrete. Each concrete washout area will be constructed per the included
detail and located to minimize the combining of wash water contaminates with
stormwater. Excess concrete material will be removed from the washout area when
the BMP has reached ½ of its capacity and will be disposed at a facility licensed to
handle the material. Special care will be taken to place washout facilities in areas
where ground water is not likely to interface with liquid wastes. Locations will be
indicated on the site map prior to installation.
g. Construction materials that could have a negative impact on water quality will be
stored, when not in active use, in a manner that will minimize contact with
stormwater. Containment structures for fuel / chemical storage will be installed per
the included detail. A site Spill Kit will be on site at all times. If any spillage occurs,
the contaminated soil shall be immediately excavated and removed from the site to a
disposal area licensed to handle the contaminated material.
h. Any changes to the proposed erosion control measures shall be noted on the SWMP
Site Map, in most cases prior to the changes being implemented in the field per the
2007 CGP. When changes are required in the field first, the site map will be amended
immediately but in no case longer than 72 hours.
i. Whenever sediment is transported onto an adjacent street, the street shall be cleaned
at the end of the day. Sediment shall be removed from the street by shoveling,
sweeping or both.
3.2.2 Structural Practices: (1.C.3.c.1)
See SWMP Reference Guide and attached GESC sheets for installation specifications
and maintenance details for all structural controls described below.
Silt Fence: Silt fence shall be installed, when appropriate, along the down-stream side of
exposed/disturbed soil areas and around the base of all stockpiles prior to grading or
stockpiling on the project. Locations are shown on the site map.
Straw Wattles: Straw wattles may be installed in areas where minimal containment is
needed as located on the site map.
Rock Wattles: Rock wattles may be installed in the flow line of the existing curb and
gutter adjacent to the project as necessary. Locations are shown on the site map.
Inlet Protection: If possible, inlet protection devices may be used at inlets located along
streets adjoining the project. Inlet protection is designed to reduce construction-related
sediment from being conveyed into the storm sewer system. If used, the inlet protection
shall be maintained until the up gradient ground surfaces have been stabilized.
Outlet Protection: On-site storm water outlets, if constructed, shall be protected with
riprap surrounding the outlet opening. The riprap will prevent scour at stormwater outlets
and minimize the potential for downstream erosion by reducing the velocity of
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concentrated stormwater flows. The outlet protection shall be maintained and in place at
all outlet locations as a permanent BMP.
Vehicle Tracking Control: Vehicle tracking pads for this site shall be placed at the access
/ exit points and shall be maintained throughout construction. An approximate thickness
of 12 inches of 3 to 6 inches riprap is recommended, but this design shall be subject to
revision based on site conditions and local ordinances to achieve the desired result.
Construction fencing will be installed as necessary to limit egress to stabilized access
points only. Locations are shown on the site map. If mud or soils are tracked onto paved
sections or public roads, the roads shall be swept clean as soon as possible. No
construction debris or soil deposits shall be allowed to impede the smooth flow of traffic
on public roads.
The project team may discover the need for additional BMPs to be installed during
construction. If necessary, BMPs such as diversion ditches, temporary type III sediment
traps or other structural controls may be implemented to reduce sediment in runoff. All
structural measures will be indicated on the site map.
3.2.3 Non-Structural Practices: (1.C.3.c.2)
Where applicable, see SWMP Reference Guide and attached GESC sheets for
installation specifications and maintenance details for related non-structural controls
described below.
Proper planning and budgeting for stormwater controls will be performed before
construction begins.
Additional stock of certain materials such as straw wattle, silt fence, gravel and other
commonly used BMPs may be kept on site to be able to quickly address unexpected
pollution prevention needs as they arise during the course of the work.
Existing vegetation will be protected and maintained wherever possible.
Vegetative ground cover will be established on all disturbed areas according to the local
ordinances and landscape plans in order to minimize erosion and stormwater runoff.
All exposed soil areas having a slope of 3:1 or greater shall be stabilized with erosion
control blankets or another BMP to minimize erosion of the slope. Final stabilization
BMPs will be implemented within 7 days after grading activities have ceased, unless
work is to be resumed within 30 calendar days. Where final grading has not occurred but
disturbed areas remain dormant, temporary stabilization methods such as surface
roughening will be implemented. All non-structural control measures implemented
during construction will be indicated on the site map.
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3.2.4. Phased Implementation of BMPs: (1.C.3.c.3)
The following chart indicates the major activities that will occur before, during and after
construction. Included within the chart are the potential pollutants and associated BMPs planned
for implementation during each of the construction activities listed. Following this chart is a
legend for the BMP designations shown. This chart will be updated prior to and throughout each
major phase of construction in order to insure the appropriate implementation of BMPs
indicated.
Construction
Activity/Sequence
Date Potential
Pollutants
Best Management Practices (BMPs)
Erosion
Sediment
Operational
Before
Construction:
N/A
Pre-construction
planning & scope
Complete final
SWMP
Training,
Planning mtgs
N/A
Project Bidding
Clear scope,
Contracts,
training
N/A
Layout and Survey
N/A
Fuel Spills
Sediment
Raw sewage
(ongoing)
Trash
Sediment
Mobilization
Initial perimeter
controls
Construction
Activity
Date Potential
Pollutants
EV
SF
GP, PT
(ongoing),
SC, HMS, TC,
SSA
SF, VTC
TC
Best Management Practices (BMPs)
Erosion
Sediment
Operational
During
Construction:
Demolition
3375 Mitchell Lane Remodel
Dust
Unused
building
materials
Sediment
SF
Erosion and Sedimentation Control Plan (ESC Plan)
Dewatering,
SC
Page 9
Rough Grading
Sediment
Dust
EV, SR, TS
EB, MU
SF, VTC, IP,
SB, DD
Underground
Utilities,
Sediment
Liquid Waste
EV, SR
SF, VTC
Asphalt Paving
Fuel
Oils
EV
Building
Foundations,
sidewalks
Sediment
Concrete
Stockpiles
Dust
EV
SF, VTC
Building Structure &
Interior Finishes
Sediment
Liquid waste
Concrete
EV
SF, VTC
Final Stabilization
Sediment
EV, PS, MU,
SF
Construction
Activity
Date Potential
Pollutants
Dewatering,
SC, GP,
HMS, TC, SP,
SSA
SC, GP,
HMS, TC,
CW, SP, SSA
SC, GP,
HMS, TC,
SSA
Dewatering,
SC, GP,
HMS, TC,
CW, TWS,
SP, SSA
SC, GP,
HMS, TC,
CW, TWS,
SP, SSA
SC
Best Management Practices (BMPs)
Erosion
Sediment
Operational
After
Construction:
Remove BMPs
(upon Final
Stabilization only)
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Trash
Debris
Erosion and Sedimentation Control Plan (ESC Plan)
TC
Page 10
BMP Legend and Maintenance Schedule:
BMP
Description
Designation
Maintenance Requirements
Refer to the Installation specification
section of the SWMP binder and
related GESC plan sheets for
installation and maintenance details
SF
Silt Fence
SR
Surface Roughening
DD
Diversion Ditch/Dike
GB
Geo-synthetic Check Barrier
DCEB
MU
Drainage Channel Erosion
Blanket
Mulching
ECB
Erosion Control Blanket
RC
Rip Rap Channel
CD
Check Dam
RRB
FB
TSD
Rip Rap Berm
Pipe end Filter Bag for
Dewatering Operations
Temporary Slope Drain
SB
Standard Temp Sed. Basins
CP
Culvert Inlet Protection
SW
Straw Wattle
VTC
Vehicle Tracking Control
CW
Concrete Washout Area
IP
Inlet Protection
OP
Outlet Protection
RCS
Rough Cut Street Control
EV
Existing Vegetation
TS
Temporary Seeding
Existing vegetation to remain undisturbed may
be protected by wire rope barriers and stakes
or orange construction fencing if necessary
Use approved standard seed mix
PS
Permanent Seeding
Use approved standard seed mix
SC
Secondary Containment
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PT
Portable Toilet
GP
Gravel Stabilized Parking
HMS
TC
Hazardous Material Storage*
Trash Container
TWS
Tool Washing Station
SSA
Stabilized Staging Area
SP
Stock pile area
*Reference Hazardous Materials Technical Data sheets for details and proper handling
procedures for chemicals used or stored on site.
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3.3 Other Controls: (1.C.3.c.1-8)
Solid construction waste and debris that are not properly disposed of can be a source of water
and wind born pollution. All waste materials will be collected and stored in a metal dumpster
rented from the Benson Roll-off Service, which is a licensed solid waste management
company in Denver. The dumpster will meet all local Arapahoe County and any State solid
waste management regulations. Trash and construction debris from the site will be deposited
in the dumpster. The dumpster will be emptied as needed, and the trash will be hauled to a
licensed landfill. No construction waste materials will be buried onsite; recycled concrete
may be used as fill with permission of the Civil Engineer. All personnel will be instructed
regarding the correct procedure for waste disposal. Notices stating these practices will be
posted in the office trailer and the individual who manages the day-to-day site operations,
will be responsible for seeing that these procedures are followed
Sanitary waste associated with portable toilets on construction sites is considered a hazardous
material and must be contained. Portable toilets are considered an adequate containment and
do not require secondary containment but must be placed on flat ground and away from inlets
and drainage ways. It is also recommended that portable toilets remain on pervious surfaces
and be secured at their base to protect against accidental tipping.
Accidental spills most often occur when loading and unloading construction materials. To
prevent and more easily contain potential discharges during loading and unloading
operations, a designated area for the majority of this type of activity will be provided (see
SSA on site map). A spill response kit will be provided in the loading and unloading area.
Construction equipment such as forklifts and other miscellaneous equipment will be
operating on this site for the duration of the project. Fueling and maintenance of this
equipment will not be allowed on the site. Incidental fuels such as gasoline and diesel, for
small machines (saws, compactors, etc.) and maintenance materials will be required. All will
be stored off site. Potential pollutants, such as paint, will be kept within designated storage
areas will have secondary containment in place to minimize the potential for direct contact
with stormwater runoff. A spill response kit will be provided for storage areas in case of
accidental spills. Spill prevention and response procedures will be followed as outlined in
section 3.4 of the SWMP.
This project’s structure has landscaping features, curb/gutter and a trash enclosure element
comprised of concrete. Concrete contains cement which has a very high PH and can be
detrimental to water quality. The process of pouring concrete typically requires that concrete
truck placement chutes be washed before leaving the job. Concrete truck chute washout will
be performed in designated, properly contained and clearly marked locations. Washout
locations will be located away from stormwater conveyances and will be noted on the site
map.
Worker trash from meals eaten on the jobsite can be a source for pollution if not properly
disposed of. Trash containers will be adequately supplied in quantities and locations to
properly address this concern. Trash containers will be emptied regularly and trash will be
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properly disposed of where it will not pose a threat to water quality. Containers will be of
sufficient weight or otherwise secured to prevent tipping by wind.
During construction operations it is often necessary for many different trades to clean tools
on the site. Efforts will be made in project preplanning to minimize the incorporation of any
materials into the building process that are hazardous to water quality. Tool washout areas
shall also be provided for the containment of paint, solvent and cement products that are
washed from tools during construction even if they are not considered “hazardous”. Under no
circumstances shall tools be cleaned in locations where associated pollutants can enter the
storm drain system.
3.4 Material Handling and Spill Prevention: (1.C.3.c.4)
The following are material management practices that will be used to reduce the risk of spills
or other accidental exposure of materials and substances to stormwater runoff.
3.4.1 Good Housekeeping: The following good housekeeping practices will be followed
onsite during the construction project:
1. An effort will be made to store only enough material required to do the job.
2. All materials stored on site will be stored in a neat, orderly manner in their
appropriate containers and off of the ground, protected from weather or within
secondary containment.
3. Products will be kept in their original containers with the original manufacturer’s
label.
4. Substances will not be mixed with one another unless recommended by the
manufacturer.
5. Whenever possible, all of a product will be used up before disposing of the
container.
6. Manufacturers’ recommendations for proper use will be followed.
7. Any remaining chemicals shall be disposed of according to manufacturers’
recommendations and in accordance with Federal, State and local regulations.
8. The SWMP Administrator will inspect regularly to ensure proper use and disposal
of materials onsite.
3.4.2 Hazardous Products: These practices are used to reduce the risks associated with
hazardous materials.
1.
2.
3.
4.
Products will be kept in original containers unless they are not re-sealable.
Original labels and material safety data will be retained.
Products will be stored under cover
If surplus product must be disposed of, manufacturers’ or local and State
recommended methods for proper disposal will be followed.
3.4.3 Product Specific Practices:
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Petroleum Products: All onsite vehicles will be monitored for leaks and receive
regular preventative maintenance to reduce the chance of leakage. Petroleum
products for vehicle and equipment operation and maintenance will be stored off site.
Any asphalt substances used onsite will be applied according to the manufacturer’s
recommendations.
Leaks occur generally as a result of faulty, old or improperly maintained equipment
or storage facilities. If unintentional leaks are detected, the operator will identify and
abate the material immediately. For impervious surfaces, an absorbent material will
be used to soak up the liquid wastes and then swept up and placed in a contained unit
for proper disposal. When leaks are detected on soils, the operator will remove
contaminated soils from the earth and place them in a contained unit for proper
disposal.
Containers used for contaminated materials will be clearly marked and kept from
coming into direct contact with stormwater. Storage or fueling areas where leaks can
occur shall be inspected visually on a regular basis. Efforts taken to abate
unintentional leaks and repair faulty equipment will be recorded in the activity log.
Unintentional leaks must not be confused with spills and should be documented
accordingly.
Fertilizers: Fertilizers will be applied only in the minimum amounts recommended
by the manufacturer. Once applied, fertilizer will be worked into the soil to limit
exposure to stormwater. Storage will be in a covered and contained area. The
contents of any partially used bags of fertilizer will be transferred to a sealable plastic
bin to avoid spills. Soil amendments will be spread and tilled into the soil
immediately upon arrival to the site in order to minimize direct contact with
stormwater runoff. Where soil amendment stock piles are necessary, they will be
contained using BMPs such as earthen berms.
Paints: All containers will be tightly sealed and stored off the ground and protected
from weather, or in secondary containment, when not required for use. Excess paint
will not be discharged into the storm sewer system, but will be properly disposed of
according to manufacturer’s instructions and State and local regulations.
Concrete: Concrete trucks will be allowed to wash their chutes in designated areas
on the site. Surplus concrete and drum wash water will be disposed of at an approved
off-site landfill and will not be allowed to be discharged at the site. No washout
material will be allowed to run off site, and wash out areas will be properly cleaned as
necessary.
3.4.4 Spill Control Practices: In addition to the good housekeeping and material
management practices discussed previously in this plan, the following practices will be
followed for spill prevention and cleanup:
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Manufacturers’ recommended methods for spill cleanup will be clearly posted in the
job trailer and site personnel will be made aware of the procedures and the location of
the information and cleanup supplies.
Materials and equipment necessary for spill cleanup will be kept in the material
storage area onsite. Equipment and materials will include but are not be limited to:
brooms, dust pans, mops, rags, gloves, goggles, absorbent powder / kitty litter, sand,
sawdust, and plastic and metal trash containers specifically for this purpose.
The operator will inform the jobsite personnel that if a spill of any size occurs they
are to always notify the SWMP manager and, depending on the nature and severity of
the spill, the operator will contact the CDPHE, downstream users and other regulatory
agencies.
The WQCD requires that any hazardous material spill be reported when any of
the following conditions occur:




Over 25 gallons of petroleum
5 CCs of mercury
Any and all raw sewage releases
Any/all State waters impacted
If any of the above criteria is met or exceeded, the Colorado Department of Public
Health and Environment, Local Emergency Planning committee, downstream users
and other agencies (MS4s) will be notified. The CDPHE will be notified by telephone
within 24 hours. In addition, written notification describing the spill and the clean up
procedures used will be sent to the agencies 5 days following the spill. If a spill does
not meet the above criteria, reporting is not mandatory.
When any spill occurs:
1) Notify the controlling operator of the site immediately following a
hazardous spill.
2) Document the spill and its clean-up procedures whether reporting is
required or not.
3) At a minimum document the following:






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Nature of spill
Quantity of spill
Date/time spill occurred
Agency notification if necessary
Clean-up procedures used
Daily monitoring (7 days) after clean-up
Photographs
Interview(s) with any witnesses of the event
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General guidelines for clean-up procedures:
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Immediately control or stop the release/spill
Mitigate the spill area as needed with a spill prevention kit
Obtain approved secondary containers to store any absorbents used
Report the spill to the Responsible Person on the jobsite for determination if
further reporting is required or if emergency notification is appropriate.
CDPHE Toll Free 24-hour Env. Emergency Spill Reporting Line:
1-877-518-5608
John Douglas, SWMP Manager / Project Superintendent:
303-901-8498
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4.0 LONG-TERM STORMWATER MANAGEMENT
Final Stabilization: (I.C.4)
Final stabilization will be achieved through building construction, new pavement for parking
areas and planting native grasses. All disturbed areas other than those constructed upon shall
receive seed, sod or some other form of vegetation or ground cover. To consider this project
site stabilized, a uniform vegetative cover with a density of at least 70 percent of predisturbance levels will first be reached. All disturbed areas (except those portions covered by
pavement or a structure) will be planted with permanent seed mix within 7 days of the
completion of construction activity. Disturbed areas where work is temporarily halted shall
be temporarily stabilized within 7 days of cessation of activity unless work is to be resumed
with 30 calendar days. NOTE: Once earthwork has begun on a section, it shall be pursued
until completion.
There is no permanent water quality BMPs planned for this site. Drainage characteristics and
ground cover types used to stabilize the site will match those present prior to construction.
At the completion of the project, when all areas have received final/permanent stabilization
measures, all temporary BMPs shall be removed and properly disposed of. If suitable
vegetative cover is not adequately established, the permit may be transferred to the Owner of
the site following completion of construction.
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5.0 INSPECTION AND MAINTENANCE (I.C.5, I.D.6)
5.1 Minimum Inspection Schedule: (1.D.6.a)
All erosion/sediment control features will be inspected for effectiveness at a minimum of
every 7 days and after each precipitation event or rain or snowmelt event that results in
surface erosion or per the requirements listed within the GESC.
5.2 Inspections and Maintenance*: (1.D.6)
The inspection process will determine if there is evidence of, or the potential for, pollutants
entering the drainage system, and BMPs will be reviewed to determine whether they meet the
design and operational criteria in the SWMP and that they continue to adequately control
pollutants at the site.
The inspection process will include identifying BMPs that are found to no longer function as
needed and designed, as well as preventative maintenance to proactively ensure continued
operation. BMPs that have failed, or have the potential to fail without maintenance or
modifications will be addressed as soon as possible to prevent the discharge of pollutants.
The inspection process will assure the replacement or the addition of BMPs as needed. Areas
outside of the limits of construction but within the development should also be visually
inspected in order to notify those responsible for BMPs found in disrepair.
The inspection process will include the updating of the SWMP to identify all pollution
sources and associated BMPs that are being implemented in the field. All activities related to
implementing the SWMP or repairing and replacing BMPs will be documented. Corrective
actions will be implemented according to CDPS requirements.
All corrective actions and stormwater management activities will be documented. Inspection
forms will contain the required certification statement and will be signed by the appropriate
SWMP administrator qualified to perform the inspection when applicable.
Silt fence will be inspected for depth of sediment, tears, to see if the fabric is securely
attached to the fence posts, and to see that the fence posts are firmly in the ground. Built up
sediment will be removed from the silt fence when it has reached 6 inches in depth.
Inlet protection devices/methods shall be inspected for effectiveness and sediment build-up.
If sediment levels reach 30%, it will be removed.
Outlet protection will be inspected for quantity and condition of rip rap and sediment buildup. If sediment levels reach 30%, it will be removed.
Wattles will be inspected for condition, undermining and sediment build-up. If sediment
levels reach 50%, it will be removed.
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The vehicle tracking control pad(s) shall be inspected to ensure the aggregate material
remains generally free of sedimentation deposits and meets the required specifications unless
otherwise noted / redlined.
Streets shall be inspected and cleaning shall be performed as needed during all construction
activities.
Seed and mulch used to minimize erosive impacts will be inspected to insure adequate
coverage and healthy growth. Additional seed and mulch will be applied to bare or eroded
areas where it is determined necessary.
5.3 Record Keeping:
A maintenance inspection report will be made after each inspection. A copy of the report
form to be completed by the inspector will be filed onsite.
A rain gauge will be located on the site and readings will be logged whenever precipitation
occurs.
A log documenting stormwater management activities that occurs outside of regular
inspection dates may be kept by the SWMP Manager on this site. The SWMP Administrator,
or his assigns, may enter documentation in the log, as they determine appropriate for site
conditions.
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6.0 STATEMENT OF CERTIFICATION
I certify under penalty of law that this document and all attachments were prepared under my
direction of supervision in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Signed_________________________________________ Date_________________
Print name and title_____________________________________________________
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