HomeMy WebLinkAboutReports - Erosion Control - 07/02/2025
EROSION CONTROL REPORT
FOR
LIBERTY COMMON JUNIOR HIGH
FORT COLLINS, CO
Owner/Developer:
LCS Building Corporation
3003 E. Harmony Road, Suite 300
Fort Collins, CO 80528
Contact: Peter Kast
Phone: 970.372.3845
Email: peter.kast@cbre.com
Contractor:
NEENAN ARCHISTRUCTION
3325 S. Timberline Road, Suite 100
Fort Collins, CO 80525
Contact: Shelby Hinchliff
Phone: 970.218.9607
Email: Shelby.hinchliff@neenan.com
Design Engineer:
ELEVATION CONSULTING GROUP, LTD
P.O. Box 280869
Lakewood, CO 80226
Contact: Lincoln Thomas, P.E.
Phone: 303.204.5065
Email: lthomas@elevationcivil.com
SWMP Administrator:
NEENAN ARCHISTRUCTION
3325 S. Timberline Road, Suite 100
Fort Collins, CO 80525
Contact: _____TBD_____________
Phone: __________
Email: ________________
July 2, 2025
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TABLE OF CONTENTS
Project Description and Nature of Construction ............................................................................. 4
Site Location ............................................................................................................................... 4
Existing Site Condition ............................................................................................................... 5
Proposed Construction Activities ............................................................................................... 5
Potential Pollutant Sources ............................................................................................................. 6
Construction Control Measures .................................................................................................... 10
Installation and Removal Sequence of Construction Measures .................................................... 11
Maintenance and Inspection Requirements .................................................................................. 11
Final Vegetation and Stabilization ................................................................................................ 12
References ................................................................................................................................. 17
Appendices ................................................................................................................................ 18
Appendix A – Reference Information
Appendix B – Contaminants of Concern Table
Appendix C – Spill Containment Plan
Appendix D – BMP Installation and Remove Sequence Chart
Appendix E – Inspection Report
Appendix F – SWMP Plans and Details
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ENGINNER’S CERTIFICATION
I hereby certify that this Erosion Control Report for the design of Liberty Common Junior High
was prepared by me (or under my direct supervision) in accordance with the provisions of the City
of Fort Collins Manual for the owners thereof.
_______________________________________
Lincoln J. Thomas, PE
State of Colorado No. 42350
For and on behalf of Elevation Consulting
7/02/25
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Project Description and Nature of Construction
Site Location
The proposed project will include minor parking lot improvements, utility services, landscaping
and 17,240 s.f. building addition between the existing 1825 and 1901 Sharp Point Drive buildings.
The majority of the existing improvements within the Site are to remain. Two water quality ponds
will be constructed to the east of the new building addition.
Figure 1-1
Vicinity Map
Liberty Common Junior High (Site) is located within Section 20, Township 7, North, Range 68
West of the 6th P.M. The Site is bounded by Sharp Point Drive to the northeast; March Court to
the northwest; Canton Court to the southeast; and Liberty Common Elementary School, 2601
Riverbend Court, 2609 Riverbend Court and 2600 Canton Court, to the southwest.
The Site is located on the parcels #8720105004 and #8720105008.
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The Site Address is 1825 Sharp Point Drive.
Global Positioning System coordinates are 40.562314, -105.028440
Existing Site Condition
The majority of soils for the Site are Loveland clay loam.
NRCS hydrologic soils group C
Wind Erodibility Group 6 and Wind erodibility Index of 48
Erosion factors: Kw=0.20, Kf=0.20, T=3
Refer to NRCS Physical Soil Properties Report, NRCS Hydrologic Soil Group and Surface Runoff
Report, Liberty School Additional Geotechnical Engineering Report excerpts In Appendix A for
additional information on soil properties.
The Site is located within the Cache La Poudre River Basin, no floodplains existing on the Site
per LOMR Case No. 23-08-0780P issued March 18, 2024 for Flood Insurance Rate Map (FIRM)
Panel 1013, Map No. 08069C1013F. Runoff from the Site is collected in area drains within the
site and conveyed through underground storm sewer pipes to Merganser Pond on the northeast
side of Sharp Point Drive before outfalling to the Cache La Poudre River. Merganser Pond is
approximately 65 feet from the Site.
The Site is 4.05 acres, including the vacated right-of-way for Riverbend Court. Current
improvements within the Site consist of 1825 Sharp Point Drive, an existing multi-tenant office
building and parking lot; Riverbend Court, an existing cul-de-sac; and 1901 Sharp Point Drive,
an existing multi-tenant office building and parking lot. The existing grades are flat to steep
ranging from less than 1% to 24%.
Existing Vegetation is mostly turf with some minor areas of rock mulch and bare ground. Pervious
Area is 0.74 Acres (18% Imperviousness).
Groundwater was encountered at depths of approximately 6 to 13.3 feet below existing grades
during Geotechnical investigation.
There are no major irrigation facilities or springs within or adjacent to the Site.
Phase 1 ESA revealed no evidence of recognized environmental conditions (RECs), controlled
recognized environmental conditions (CRECs), or historical recognized environmental conditions
(HRECs) connection with the site.
Proposed Construction Activities
Construction includes minor parking lot improvements, utility services, landscaping and 17,240
s.f. building addition between 1825 and 1901 Sharp Point Drive buildings. The proposed
construction activities associated with this report are Pre-Disturbance & Site Access, Demolition,
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Grading & Excavation, Building Construction, Utility Construction and Paving, Final Grading
Landscaping & Installation of Final Stabilization Measures with the total area of these proposed
grading activities being 1.33 acres of the 4.05 acre Total Project Area. The remainder of the site
will not be disturbed, therefore minimizing soil exposure.
There will be approximately 137 cubic yards of import material to complete grading operations.
Additional Permits required:
· Colorado Department of Public Health and Environment (CDPHE) Construction
Stormwater Construction Discharge Permit
Potential Pollutant Sources
All potential pollutant sources, including materials and activities, were evaluated for the potential
to contribute pollutants to stormwater discharges. This SWMP will identify and describe those
sources that have the potential to contribute pollutants to stormwater discharges. Potential
pollutant sources will be controlled through control measure selection and implementation. The
following potential pollutant sources were evaluated for this project.
· Disturbed and stored soils – Yes- Approximately 33% percent of this Site will be
disturbed with the Construction Activities. Once soils have been disturbed they do not
retain the same compaction as in their native state, therefore surface runoff can cause
more soil erosion than was historically observed. Once exposed those areas of exposed
soils will be kept in a roughened condition (Surface Roughening). In the event that these
erosion control practices do not keep sediment on site a structural barrier (Silt Fence) will
be used and is called out for on the perimeter. If soil manages to migrate from the
disturbed areas onto the hard surfaces it will be swept or scraped (Street Sweeping) to
prevent the migration of sediment. In case that sediment is washed away too quickly the
curb inlets will need protection (Inlet Protection). Stockpiles in the same respect do not
retain the same compaction and are more susceptible to soil erosion. Stockpiles on this
site will require perimeter run off controls (Stockpile Management). The stockpile will
be kept loose, not compacted, and watered as needed to prevent dust issues (Dust
Control). The stockpile will be monitored for signs of erosion displacement and sediment
accumulation.
· Vehicle tracking of sediments – Yes - Vehicle tracking of sediment may occur throughout
the construction process and along all areas where the pavement meets the disturbed dirt.
This occurs most often after any melt off or rain conditions when mud collects on vehicles
tires and is tracked out onto the road consequently leaving site. This increases the
possibility of sediment discharging to the storm system. To prevent tracking, construction
fence will be used to limit the access by the contractor and their subs to only one
construction entrance (Vehicle Tracking Control) off of Sharp Point Drive. There will be
a gate at the entrance that will be closed before contractors come on site during the muddy
days (site management control) and will only be opened to let larger deliveries drop off,
otherwise subcontractor parking will be kept to the existing parking lot. The tracking
pad will be monitored visually every day and if track-out becomes a significant problem
a larger or more robust tracking pad may be installed. Otherwise, all track-out that
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reaches the street will be scraped and swept (Street Sweeping). Secondary controls at the
closest affected combination inlets will have protection (Inlet Protection) to capture
sediment not swept up in a timely manner.
· Management of Contaminated Soils – No
· Loading and unloading operations – Yes - During this project there will be a diverse
amount of loading and unloading going on. There will be a significant amount of export
leaving the site, the foundation workers will have to deliver forms to the site and deliver
premixed concrete. Building materials will have to be staged around the site and
Landscapers will have to pile the materials on site to complete the landscape work.
Though the loading and loading vehicles will be contributing to the track out of materials,
depending on the material being delivered to the site they may have a significant spill
potential. In addition to the vehicle tracking of sediments section of this report, (Vehicle
Tracking Control, Street Sweeping, etc.) contractors will be required to park their
vehicles within the existing parking lot (site management control). The only vehicles
allowed on site will be fork lifts, concrete trucks, and the like (site management control).
Where the trailers must access the site an attempt will be made to keep the vehicle within
the exiting parking lot. Within the existing parking lot, materials will be placed in piles
along the hardscape the use of site forklifts will be more heavily used. When loading and
unloading is occurring, depending on the materials, there may be an increased problem
of containers being dropped, punctured, or broken. These off-loading activities will be
done under roofs or awnings where possible, locating away from storm drains and will
have nearby spill kits accessible. Spills on site will be addressed using spill prevention
and response procedures.
· Outdoor storage of construction materials, building materials, fertilizers, and chemicals
– Yes - It is anticipated that inert material like wood, shingles, tiles, siding insulation and
stone will be stored on site and outside in the elements. It is also anticipated that materials
that do not weather well (cement, mortar, etc.) will also be located outside. Chemicals
are not anticipated to be left outside. As the inert materials have a lower potential to leave
the site they will be monitored during inspection to make sure they are not being impacted
by the exposure to the elements. (Good Housekeeping Practices) The materials that will
need added attention are the cements and mortars as they quickly mix with water and
cause pollution issues. These materials when not stored inside will be placed on pallets
to get above potential surface runoff and covered with tarps or plastic to prevent mixing
with stormwater (materials management control). Very small quantities of chemical are
needed to contaminate stormwater so the fertilizers, paints, form oils, petroleum
products, and other typical chemicals, will be stored in the construction connex box,
trailers, vehicles, or the like out of contact with precipitation (Good Housekeeping
Practices). If not stored in a location as described, secondary containment will be
required.
· Bulk Storage of Materials – No
· Vehicle and equipment maintenance and fueling – No - Based on the size of the site and
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the short window of activities vehicle fueling and vehicle maintenance is highly unlikely.
As fueling and equipment maintenance usually result in small spills of petroleum
products it is important to monitor these activities carefully. (Good Housekeeping
Practices) If onsite maintenance or fueling is required, it will be done in the least
detrimental way possible. The maintenance and fueling will be located as far from
stormwater features as possible and at least 50 feet from a stormwater feature (Good
Housekeeping Practices). The fueling activity will have spill materials nearby and a
bucket or other container and shovel located nearby to hang a hose after filling to catch
drips, and to scoop up any dirt that inadvertently mixed with the soil (Good Housekeeping
Practices). That container will have a lid and be disposed of when the activity is
completed. The maintenance work will be done on a tarp or other material to prevent the
residual oils and greases from mixing with the dirt (Good Housekeeping Practices).
· Significant dust or particulate generating processes – Yes - This project will result in
earth moving activities, street sweeping, and track-out and carry out, construction
materials transport, and saw cutting. As these activities will result in offsite transport of
atmospheric pollution reasonable precautions shall be taken. The project will follow all
required “BMPs” articulated in the Fort Collins Dust Prevention and Control Manual and
a least one additional BMP included during each of the identified activities in accordance
with City Ordinance No. 044,2016. Also a copy of the Fort Collins Dust Prevention and
Control Manual will be kept in the trailer during construction for reference. Such
activities will include but not limited to watering the site, covering trucks, slower site
speeds and vehicle tracking mentioned above.
· Routine maintenance activities involving fertilizers, pesticides, detergents, fuels,
solvents, and oils – Yes - Fertilizers and Pesticides will be used during the later phases
of the project when trying to establish a healthy vegetation. These chemicals are highly
water soluble and are easily and unnoticeably carried in the stormwater. Proper
application rates and recommended timing of application will be strictly followed and
not on days, or the next day, where the weather is calling for precipitation (Good
Housekeeping Practices). As most of these types of chemicals will be brought on by the
Landscaper they will be required to keep these products in their vehicles until time of
application and not be allowed to leave these materials on the site (Good Housekeeping
Practices). If these materials are stored on site they shall be kept inside or outside covered
and above the ground to prevent the materials from mixing with water and runoff (Good
Housekeeping Practices). Detergents, paints, acids, cement, grout, and solvents will be
prevalent in the interior work of the building. These materials also are typically easily
mixed with water yet are typically noticeable by discolored, cloudy, or sudsy water. As
such, the contractor will always keep an eye out for these types of differences in water
around the site (Good Housekeeping Practices). However these materials are to be
handled, operated, and cleaned up all within the inside of the structure, where external
use is concerned these materials will be stored in the construction connex box, trailers,
vehicles, or the like out of contact with precipitation (Good Housekeeping Practices). If
not stored in a location as described secondary containment will be required (materials
management). Fuels and oils might be associated with the smaller equipment used on
site, chainsaws, pumps, generators, etc. As petroleum products are easily suspended in
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water and are spread across the top of the water surface. These products when located in
water have rainbow sheen on them. They are also monitored during construction (site
management controls). These products will be stored in the construction connex box,
trailers, vehicles, or similar structure that will minimize contact with precipitation
(materials maintenance controls). If not stored in a location as described secondary
containment will be required (Good Housekeeping Practices). Any untreated runoff from
these activities can be detrimental to wildlife if not cleaned up.
· On-site waste management practices (waste piles, liquid wastes, dumpsters, etc.) – Yes -
All large and heavy weighted waste piles (concrete chunks, excavated pipes, etc.) will be
kept in a neat grouped pile until the material is to be disposed of properly. These piles
will only be stored a short duration 5-10 days and will be kept 50 feet from any drainage
course or inlet. All dry wastes will be maintained through dumpsters and monthly hauler
removal (hauler will be notified if dumpster becomes full and hauled off as needed).
Where available by the hauling company the dumpster will be covered. If not practical
or available by the haul company, an increased removal schedule will be followed and
the “Max fill line” on the dumpster will be strictly followed. Corners of the dumpsters
will be monitored for “Dumpster Juice” leaking into the soil in dry conditions and
rain/melt off conditions looking for it mixing with the runoff. Dumpsters, like the waste
piles, will be located at least 50 feet from any drainage course or inlet. Workers will be
sent around at the end of the day to collect trash to prevent trash being left out overnight.
· Concrete truck/equipment washing, including the concrete truck chute and associated
fixtures and equipment – Yes - Concrete will be a large portion of this project. It is
anticipated that it will be used with pour in place inlets, curb and gutter installation,
sidewalks, and foundations. Pre mixed concrete trucks will be used in this process and
will be delivered to the site and when pouring the foundation a pump truck will be used
all of which will need to be maintained through the washing of their chutes and pump
arms to prevent the concrete from hardening and ruining the equipment. This concrete
wash water has a high alkaline content which is hazardous material to terrestrial and
aquatic wildlife. Concrete Washout Area will be located at least 50 feet from any
drainage course. The contractor (including all masonry and concrete tradesmen) shall
clean out equipment within the washout area so that the runoff is not allowed to leave the
washout. The only exception would be for them to wash in the next day’s pour location.
All concrete workers will be made aware of where they are to wash. If there is a
significant amount of spillage when the transfer from concrete truck to pump truck
occurs, a tarp or other ground cloth should be used to collect spillage. (Good
Housekeeping Practices).
· Dedicated asphalt and concrete batch plants – No
· Non-industrial waste sources such as worker trash and portable toilets – Yes - Trash and
sanitary facilities will be required on the site. Worker trash will be comingled with the
industrial trash and will follow the same controls. If tipped over and when being cleaned,
portable toilet facilities become a potential discharge if not cleaned up. If human waste
is spilled, it will need to be treated as a biological hazard of untreated sewage and will
need to be cleaned up in accordance with Larimer County Health Department Guidance.
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The toilets will be secured in a way to prevent tipping and located at least 50 feet from a
drainage course or inlet. A containment pan or other secondary containment will be
provided. They will also be anchored prevent from tipping. All materials shall be
properly disposed of in accordance with the law.
· Sawcutting and Grinding – Yes - The trench work will require cutting into the City street.
This project will need the use of hardened saws. These saws generate a significant amount
of dust. Watering the cutting surface to prevent airborne particulates (BMP in the Fort
Collins Dust Prevention and Control Manual) is required. The cutting slurry has a high
content of fine particulates (Silica Dust, Metals, etc.) that is not allowed to discharge as
runoff from the site. To prevent slurry from discharging offsite, contractors will use the
minimum amount of water needed to prevent dust and blades from overheating. Cutting
slurry will be collected via vacuum or allowed to dry out and be scraped and swept up
after the cutting has finished.
· Ground Water Dewatering – No - Based upon the geotechnical data, ground water levels
indicate that it will be lower than the bottom of the deepest excavation. However, if
encountered, dewatering activities may be required. Groundwater has in most
excavations mixed with the dirt and as they are pumped they will add an increased
velocity coming out of the out flow end contributing to erosion and speeding the transport
of the suspended sediment particles. Also, construction dewatering activities must be
identified in the Erosion Control Report if they are to be infiltrated on site. If the material
is anticipated to be pumped to a stormwater conveyance the proper Construction
Dewatering Permit must be pulled from the State of Colorado. If pumping activities are
to occur on the site, the use of rock packs on the intake end of the pump will be used and
a silt bag will be used on the outflow end of the pump to reduce the silt and sediment
from leaving the activity (dewatering Control Measure). If this will be under a
Dewatering Permit water samples will be collected in accordance with that permit.
Additional potential contaminants of concern can be found in the table in Appendix B.
Construction Control Measures
· Silt Fence down gradient of all disturbed area to intercept/filter sediment laden runoff.
· Construction Fence to prevent public from accessing construction site.
· Rock Sock to intercept/filter sediment laden runoff within Street curb and gutter.
· Stockpile Management for temporary storage of cut and import material.
· Vehicle Tracking Control shall be installed at construction entrance into disturbed area.
All construction traffic shall enter and exit through this entrance.
· Concrete Washout Area to isolate concrete truck washout operations.
· Inlet Protection to reduce sediment runoff approaching inlets by placing a reinforced rock
berm in front if, but not blocking a curb-opening inlet or area inlet.
· Surface Roughening to create a series of grooves or furrows on the contour in disturbed,
graded areas to trap runoff and reduce the formation of rill and gully erosion. Also used
to minimize sediment transport via wind.
· Dust Control - Minimizing wind erosion and controlling fugitive dust will be
accomplished by surface roughening the soil to produce ridges perpendicular to the
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prevailing wind and frequent watering of excavation, fill and unvegetated areas.
· Street Sweeping: Streets will be swept if site conditions show accumulations of dirt that
require removal. These practices will be implemented anywhere sediment is tracked
from the project site onto public or private paved roads.
· Sod/Landscape Stabilization to provide soil protection through new plant growth (sod
and seed), plantings, trees, mulching (rock or wood mulch)
· Good Housekeeping Practices:
o Chemical Management: Chemical management includes the proper labeling,
handling, storage and disposal of chemical products. All materials stored on-site,
including fertilizers or herbicides used during landscaping, will be inspected to
ensure proper use and disposal to reduce the risk of spills or other accidental
exposure to stormwater runoff. Products will be kept in their original containers
with the original manufacturer’s label. Manufacturers’ recommendations for
proper use and disposal will be followed. Whenever possible, all of a product
will be used up before disposing of the container. Substances will not be mixed
with one another unless recommended by the manufacturer. No solid materials,
including building materials, will be discharged to waters of the United States.
o Solid Waste Management: Trash and debris will be limited onsite to the degree
possible. Trash and debris will be disposed of in the proper waste receptacles.
Covered dumpsters shall be provided in the combined staging area. Full
dumpsters will be removed from the site or disposed of by trash hauling
contractors as necessary.
o Equipment Maintenance Procedures: If required, a stabilized area for equipment
maintenance and equipment storage shall be located onsite. Vehicle equipment
and maintenance areas shall be inspected regularly and on each day of use.
Vehicles and equipment stored on-site will be inspected for fuel or lubricant
leakage to reduce the risk of contamination to stormwater runoff. Substances that
have the potential for polluting surface and/or groundwater shall be controlled by
whatever means necessary in order to ensure that they do not discharge from the
site. If a spill occurs, it will be contained and disposed so that it will not flow
from the site or enter groundwater.
o Spill Prevention and Control Plan: See Appendix C
Installation and Removal Sequence of Construction Measures
See chart in Appendix D
Maintenance and Inspection Requirements
Routine inspections shall be performed at the site to ensure that BMP’s are functional and that the
SWMP is being properly implemented. The site will be inspected a minimum once every 14
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calendar days and also within 24 hours after the end of any precipitation or snowmelt event that
causes surface erosion. Contractor shall make repairs and clean out of BMPs as necessary. More
frequent inspections and repairs shall be required during winter conditions due to freeze/thaw
problems.
A report shall be prepared documenting any findings on the conditions of the SWMP controls and
any erosion problem areas. All measures will be maintained in good working order. If a repair is
necessary, it will be initiated within 24-hours of the inspection report.
Inspections shall include all areas of the site disturbed by construction activity and areas used for
storage of materials that are exposed to precipitation. Sedimentation and erosion control measures
will be inspected to ensure they are operating correctly to prevent significant impacts to receiving
waters. Locations where vehicles enter or exit the site shall be inspected for evidence of offsite
sediment tracking.
An inspection report shall be completed after each inspection documenting BMP’s and areas
inspected and the conditions found. Any revisions to the SWMP to add or modify BMP’s to
correct problems shall occur within 7 days. The inspection reports and any follow-up action taken
shall be retained as part of the SWMP for three years from the date that the permit coverage
expires or is terminated.
Refer to Erosion Control Detail sheets in Appendix F for maintenance for each Construction
Control Measure.
Final Vegetation and Stabilization
Once construction is complete, final stabilization will be achieved through site improvements
including paved areas, landscaping, seeding and ground cover. Areas where sod will be installed
per the approved landscape plan and will require soil amendments and soil bed preparation per City
of Fort Collins Section 12-160-162 code requirements. Sodded areas will be installed using rolled
sod and will be irrigated with permanent irrigation. Sodded areas will be considered stabilized
immediately upon installation. Sod installation should generally be completed between April 15
and October 1.
Areas where shrubs, ornamental grasses and perennials will be installed (planting beds) per the
approved landscape plan and will require soil amendments and soil bed preparation per City of Fort
Collins Section 12-160-162 code requirements. Planting beds will be installed with container
plantings per the landscape plan and planting schedule. Planting beds will be mulched with organic
wood mulch or cobble mulch per the landscape plan and will be considered stabilized immediately
upon installation of the specified mulch. Planting should generally be completed between April 15
and October 1.
Areas that require seeding per the approved landscape plan will require soil amendments and soil
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bed preparation per City of Fort Collins Section 12-160-162 code requirements. Seeding will be
performed based on the approved specifications and landscape planting plans. Seeded areas will be
irrigated with a permanent irrigation system. Proposed seed mixes have been provided below. All
seeded areas will be mulched with either crimped straw or hydromulch within four (4) hours of
seeding. If required and called out on the approved plans and specifications, additional erosion
control blanket will be installed to address areas of higher potential for erosion. Seeded areas will
be considered stabilized following installation of the approved mulching material and method and
additional erosion control materials as required.
Seeding should generally be completed between April 15 and October 1. Seeding dates may be
modified when temperature and moisture conditions are favorable subject to Project Manager
approval. Once installed all seeding will be monitored until the site has reached a vegetative cover
(density) of 70%. It is anticipated that the site will be seeded in the fall of 2025 and will be fully
established in the fall of 2027. At the point the vegetation has reached 70% density, and confirmed
by the City of Fort Collins, the warranty period for Erosion Control will begin, all stormwater
infrastructure will be cleaned and removed of any sediment deposits and any remaining temporary
Control Measures will be removed.
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References
1. Fort Collins Stormwater Criteria Manual – City of Fort Collins, December 2018.
2. Urban Storm Drainage Criteria Manual – Mile High Flood District, 2010.
3. Dust Prevention and Control Manual – City of Fort Collins, May 2016.
4. Liberty School Addition Geotechnical Engineering Report– Terracon, February
18, 2025.
5. Phase I Environmental Site Assessment Lake Center– Blackstone Consulting
LLC, November 15, 2021.
6. Phase I Environmental Site Assessment Sharp Point– Blackstone Consulting LLC,
November 15, 2021.
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Appendices
Appendix A – Reference Information
Appendix B – Contaminants of Concern Table
Appendix C – Spill Prevention and Control Plan
Appendix D – BMP Installation and Remove Sequence Chart
Appendix E – Inspection Report
Appendix F – SWMP Plans and Details
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APPENDIX A
REFERENCE
INFORMATION
Soil Map—Larimer County Area, Colorado
(Liberty Common Junior HIgh)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
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Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 50 100 200 300
Feet
0 25 50 100 150
Meters
Map Scale: 1:1,760 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 19, Aug 29, 2024
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 2, 2021—Aug 25,
2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Soil Map—Larimer County Area, Colorado
(Liberty Common Junior HIgh)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 2 of 3
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
22 Caruso clay loam, 0 to 1
percent slope
1.6 23.4%
64 Loveland clay loam, 0 to 1
percent slopes
5.1 76.6%
105 Table Mountain loam, 0 to 1
percent slopes
0.0 0.0%
Totals for Area of Interest 6.7 100.0%
Soil Map—Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 3 of 3
Hydrologic Soil Group and Surface Runoff
This table gives estimates of various soil water features. The estimates are used
in land use planning that involves engineering considerations.
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long-duration storms.
The four hydrologic soil groups are:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas.
Surface runoff refers to the loss of water from an area by flow over the land
surface. Surface runoff classes are based on slope, climate, and vegetative
cover. The concept indicates relative runoff for very specific conditions. It is
assumed that the surface of the soil is bare and that the retention of surface
water resulting from irregularities in the ground surface is minimal. The classes
are negligible, very low, low, medium, high, and very high.
Report—Hydrologic Soil Group and Surface Runoff
Absence of an entry indicates that the data were not estimated. The dash
indicates no documented presence.
Hydrologic Soil Group and Surface Runoff–Larimer County Area, Colorado
Map symbol and soil name Pct. of map unit Surface Runoff Hydrologic Soil Group
22—Caruso clay loam, 0 to 1 percent slope
Caruso 85 High D
Hydrologic Soil Group and Surface Runoff---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 1 of 2
Hydrologic Soil Group and Surface Runoff–Larimer County Area, Colorado
Map symbol and soil name Pct. of map unit Surface Runoff Hydrologic Soil Group
64—Loveland clay loam, 0 to 1 percent slopes
Loveland 90 Medium C
105—Table Mountain loam, 0 to 1 percent slopes
Table mountain 85 Low B
Data Source Information
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 19, Aug 29, 2024
Hydrologic Soil Group and Surface Runoff---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 2 of 2
Physical Soil Properties
This table shows estimates of some physical characteristics and features that
affect soil behavior. These estimates are given for the layers of each soil in the
survey area. The estimates are based on field observations and on test data for
these and similar soils.
Depth to the upper and lower boundaries of each layer is indicated.
Particle size is the effective diameter of a soil particle as measured by
sedimentation, sieving, or micrometric methods. Particle sizes are expressed as
classes with specific effective diameter class limits. The broad classes are sand,
silt, and clay, ranging from the larger to the smaller.
Sand as a soil separate consists of mineral soil particles that are 0.05 millimeter
to 2 millimeters in diameter. In this table, the estimated sand content of each soil
layer is given as a percentage, by weight, of the soil material that is less than 2
millimeters in diameter.
Silt as a soil separate consists of mineral soil particles that are 0.002 to 0.05
millimeter in diameter. In this table, the estimated silt content of each soil layer is
given as a percentage, by weight, of the soil material that is less than 2
millimeters in diameter.
Clay as a soil separate consists of mineral soil particles that are less than 0.002
millimeter in diameter. In this table, the estimated clay content of each soil layer
is given as a percentage, by weight, of the soil material that is less than 2
millimeters in diameter.
The content of sand, silt, and clay affects the physical behavior of a soil. Particle
size is important for engineering and agronomic interpretations, for determination
of soil hydrologic qualities, and for soil classification.
The amount and kind of clay affect the fertility and physical condition of the soil
and the ability of the soil to adsorb cations and to retain moisture. They influence
shrink-swell potential, saturated hydraulic conductivity (Ksat), plasticity, the ease
of soil dispersion, and other soil properties. The amount and kind of clay in a soil
also affect tillage and earthmoving operations.
Moist bulk density is the weight of soil (ovendry) per unit volume. Volume is
measured when the soil is at field moisture capacity, that is, the moisture content
at 1/3- or 1/10-bar (33kPa or 10kPa) moisture tension. Weight is determined after
the soil is dried at 105 degrees C. In the table, the estimated moist bulk density
of each soil horizon is expressed in grams per cubic centimeter of soil material
that is less than 2 millimeters in diameter. Bulk density data are used to compute
linear extensibility, shrink-swell potential, available water capacity, total pore
space, and other soil properties. The moist bulk density of a soil indicates the
pore space available for water and roots. Depending on soil texture, a bulk
density of more than 1.4 can restrict water storage and root penetration. Moist
bulk density is influenced by texture, kind of clay, content of organic matter, and
soil structure.
Physical Soil Properties---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 1 of 5
Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a
saturated soil transmit water. The estimates in the table are expressed in terms
of micrometers per second. They are based on soil characteristics observed in
the field, particularly structure, porosity, and texture. Saturated hydraulic
conductivity (Ksat) is considered in the design of soil drainage systems and
septic tank absorption fields.
Available water capacity refers to the quantity of water that the soil is capable of
storing for use by plants. The capacity for water storage is given in inches of
water per inch of soil for each soil layer. The capacity varies, depending on soil
properties that affect retention of water. The most important properties are the
content of organic matter, soil texture, bulk density, and soil structure. Available
water capacity is an important factor in the choice of plants or crops to be grown
and in the design and management of irrigation systems. Available water
capacity is not an estimate of the quantity of water actually available to plants at
any given time.
Linear extensibility refers to the change in length of an unconfined clod as
moisture content is decreased from a moist to a dry state. It is an expression of
the volume change between the water content of the clod at 1/3- or 1/10-bar
tension (33kPa or 10kPa tension) and oven dryness. The volume change is
reported in the table as percent change for the whole soil. The amount and type
of clay minerals in the soil influence volume change.
Linear extensibility is used to determine the shrink-swell potential of soils. The
shrink-swell potential is low if the soil has a linear extensibility of less than 3
percent; moderate if 3 to 6 percent; high if 6 to 9 percent; and very high if more
than 9 percent. If the linear extensibility is more than 3, shrinking and swelling
can cause damage to buildings, roads, and other structures and to plant roots.
Special design commonly is needed.
Organic matter is the plant and animal residue in the soil at various stages of
decomposition. In this table, the estimated content of organic matter is expressed
as a percentage, by weight, of the soil material that is less than 2 millimeters in
diameter. The content of organic matter in a soil can be maintained by returning
crop residue to the soil.
Organic matter has a positive effect on available water capacity, water infiltration,
soil organism activity, and tilth. It is a source of nitrogen and other nutrients for
crops and soil organisms.
Erosion factors are shown in the table as the K factor (Kw and Kf) and the T
factor. Erosion factor K indicates the susceptibility of a soil to sheet and rill
erosion by water. Factor K is one of six factors used in the Universal Soil Loss
Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE) to
predict the average annual rate of soil loss by sheet and rill erosion in tons per
acre per year. The estimates are based primarily on percentage of silt, sand, and
organic matter and on soil structure and Ksat. Values of K range from 0.02 to
0.69. Other factors being equal, the higher the value, the more susceptible the
soil is to sheet and rill erosion by water.
Erosion factor Kw indicates the erodibility of the whole soil. The estimates are
modified by the presence of rock fragments.
Erosion factor Kf indicates the erodibility of the fine-earth fraction, or the material
less than 2 millimeters in size.
Physical Soil Properties---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 2 of 5
Erosion factor T is an estimate of the maximum average annual rate of soil
erosion by wind and/or water that can occur without affecting crop productivity
over a sustained period. The rate is in tons per acre per year.
Wind erodibility groups are made up of soils that have similar properties affecting
their susceptibility to wind erosion in cultivated areas. The soils assigned to
group 1 are the most susceptible to wind erosion, and those assigned to group 8
are the least susceptible. The groups are described in the "National Soil Survey
Handbook."
Wind erodibility index is a numerical value indicating the susceptibility of soil to
wind erosion, or the tons per acre per year that can be expected to be lost to
wind erosion. There is a close correlation between wind erosion and the texture
of the surface layer, the size and durability of surface clods, rock fragments,
organic matter, and a calcareous reaction. Soil moisture and frozen soil layers
also influence wind erosion.
Reference:
United States Department of Agriculture, Natural Resources Conservation
Service. National soil survey handbook, title 430-VI. (http://soils.usda.gov)
Physical Soil Properties---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 3 of 5
Report—Physical Soil Properties
Physical Soil Properties–Larimer County Area, Colorado
Map symbol
and soil name
Depth Sand Silt Clay Moist
bulk
density
Saturated
hydraulic
conductivity
Available
water
capacity
Linear
extensibility
Organic
matter
Erosion
factors
Wind
erodibility
group
Wind
erodibility
index
Kw Kf T
In Pct Pct Pct g/cc micro m/sec In/In Pct Pct
22—Caruso
clay loam, 0
to 1 percent
slope
Caruso 0-35 -35--34-27-31- 35 1.25-1.35 0.42-1.41 0.18-0.21 0.0-2.9 1.0-2.0 .32 .32 4 6 48
35-44 -64--27-5- 9- 13 1.35-1.50 14.11-42.34 0.06-0.13 0.0-2.9 0.5-1.0 .32 .32
44-60 -97-- 2-0- 2- 3 1.45-1.60 141.14-705.00 0.02-0.04 0.0-2.9 0.0-0.5 .02 .05
64—Loveland
clay loam, 0
to 1 percent
slopes
Loveland 0-15 -33--32-30-35- 40 1.20-1.25 1.41-4.23 0.18-0.20 3.0-5.9 1.0-3.0 .20 .20 3 6 48
15-32 -35--38-18-27- 35 1.35-1.45 4.23-14.11 0.18-0.20 0.0-2.9 1.0-2.0 .32 .32
32-60 -96-- 2-0- 3- 5 1.55-1.65 141.14-705.00 0.03-0.06 0.0-2.9 0.0-0.5 .02 .05
105—Table
Mountain
loam, 0 to 1
percent
slopes
Table
mountain
0-36 -44--41-10-15- 20 1.25-1.40 4.23-14.11 0.14-0.18 0.0-2.9 1.0-4.0 .37 .37 5 5 56
36-60 -37--35-20-28- 35 1.25-1.40 4.23-14.11 0.14-0.20 0.0-2.9 0.5-2.0 .32 .32
Physical Soil Properties---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 4 of 5
Data Source Information
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 19, Aug 29, 2024
Physical Soil Properties---Larimer County Area, Colorado Liberty Common Junior HIgh
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
4/10/2025
Page 5 of 5
National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250
Feet
Ü
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOOD
HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, V, A99
With BFE or Depth Zone AE, AO, AH, VE, AR
Regulatory Floodway
0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mile Zone X
Future Conditions 1% Annual
Chance Flood Hazard Zone X
Area with Reduced Flood Risk due to
Levee. See Notes.Zone X
Area with Flood Risk due to Levee Zone D
NO SCREEN Area of Minimal Flood Hazard Zone X
Area of Undetermined Flood Hazard Zone D
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
Coastal Transect
Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of Study
Jurisdiction Boundary
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 10/28/2024 at 9:00 PM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data over time.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.
Legend
OTHER AREAS OF
FLOOD HAZARD
OTHER AREAS
GENERAL
STRUCTURES
OTHER
FEATURES
MAP PANELS
8
B 20.2
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
1:6,000
105°2'1"W 40°33'58"N
105°1'23"W 40°33'31"N
Basemap Imagery Source: USGS National Map 2023
SITE
Report Cover Page
Prepared for:
LCS Building Corporation
1725 Sharp Point Drive
Fort Collins, Colorado 80525
Liberty School Addition
Geotechnical Engineering Report
Fort Collins, Colorado
February 18, 2025 | Terracon Project No. P20245058
Geotechnical Engineering Report
Liberty School Addition | Fort Collins, Colorado
February 18, 2025 | Terracon Project No. P20245058
Facilities | Environmental | Geotechnical | Materials
Note to Preparer: This is a large table with outside borders. Just click inside the table
above this text box, then paste your GIS Toolbox image.
When paragraph markers are turned on you may notice a line of hidden text above
and outside the table – please leave that alone. Limit editing to inside the table.
The line at the bottom about the general location is a separate table line. You can edit
it as desired, but try to keep to a single line of text to avoid reformatting the page.
Exploration Plan
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES MAP PROVIDED BY MICROSOFT BING MAPS
4896.7
4895
4881
4867.6
ASPHALT, about 4 inches thick
AGGREGATE BASE COURSE, about 20 inches
thick
POORLY GRADED SAND WITH GRAVEL, with
cobbles, brown with gray, pink and red,
medium dense to very dense
CLAYSTONE BEDROCK, light gray to dark
gray, very hard
Boring Terminated at 29.4 Feet
Boring Log No. B-1
De
p
t
h
(
F
t
.
)
5
10
15
20
25
Wa
t
e
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L
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Ob
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v
a
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s
Facilities | Environmental |Geotechnical | Materials
Gr
a
p
h
i
c
L
o
g
Mo
d
e
l
L
a
y
e
r
1.1
0.9
6.7
13.0
9.6
18.1
14.8
22.4
127
112
0.3
2.0
16.0
29.4
12-23
35/12"
15-23-31
N=54
50/6"
9-6-10
N=16
11-11
22/12"
50/5"
50/4"
50/5"
Abandonment Method
Borings were backfilled with cementitous flowable fill and
patched with asphalt
Advancement Method
4.25-inch inside diameter, continuous-flight, hollow-stem
augers
Liberty School Addition
1825 and 1901 Sharp Point Drive | Fort Collins, CO
Terracon Project No. 20245058
Water Level Observations
7 feet while drilling
9 feet at completion of drilling
Fort Collins, CO
1901 Sharp Point Dr Ste C
Notes
See Exploration and Testing Procedures for a description of field and laboratory
procedures used and additional data (If any).
See Supporting Information for explanation of symbols and abbreviations.
Elevation Reference: Elevations were interpolated from a publicly available USGS
topographic map
Drill Rig
CME 55
Boring Started
01-30-2025
Boring Completed
01-30-2025
Logged by
PA
Hammer Type
Automatic, Hammer
Efficiency = 68%
Driller
Terracon Consultants
Sa
m
p
l
e
T
y
p
e
Pe
r
c
e
n
t
Fi
n
e
s
Un
c
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f
i
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d
Co
m
p
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s
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St
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e
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g
t
h
(
p
s
f
)
Wa
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Co
n
t
e
n
t
(
%
)
Dr
y
U
n
i
t
We
i
g
h
t
(
p
c
f
)
Approximate Elevation: 4897 (Ft.)
LL-PL-PI
Atterberg
LimitsSeeExploration Plan
Latitude: 40.5624° Longitude: -105.0281°
Location:
Depth (Ft.)
Sw
e
l
l
-
C
o
n
s
o
l
/
Lo
a
d
(
%
/
p
s
f
)
Fi
e
l
d
T
e
s
t
Re
s
u
l
t
s
2
3
4896.3
4893
4876
4867.7
ASPHALT, about 8 inches thick
FILL - SANDY LEAN CLAY (CL), dark brown
POORLY GRADED SAND WITH GRAVEL, with
cobbles, brown with gray, pink and red,
medium dense to very dense
loose at about 14 feet
CLAYSTONE BEDROCK, light gray to dark
gray, very hard
Boring Terminated at 29.3 Feet
Boring Log No. B-2
De
p
t
h
(
F
t
.
)
5
10
15
20
25
Wa
t
e
r
L
e
v
e
l
Ob
s
e
r
v
a
t
i
o
n
s
Facilities | Environmental |Geotechnical | Materials
Gr
a
p
h
i
c
L
o
g
Mo
d
e
l
L
a
y
e
r
66.519.2
2.1
2.0
5.8
14.1
18.6
18.1
20.7
108
97
107
100
41-16-25
0.7
4.0
21.0
29.3
+0.3/2005-7
12/12"
3-8-11
N=19
34-46
80/12"
18-24-25
N=49
4-11
15/12"
44-50/4"
50/5"
50/3"
Abandonment Method
Borings were backfilled with cementitous flowable fill and
patched with asphalt
Advancement Method
4.25-inch inside diameter, continuous-flight, hollow-stem
augers
Liberty School Addition
1825 and 1901 Sharp Point Drive | Fort Collins, CO
Terracon Project No. 20245058
Water Level Observations
6 feet while drilling
7 feet at completion of drilling
Fort Collins, CO
1901 Sharp Point Dr Ste C
Notes
See Exploration and Testing Procedures for a description of field and laboratory
procedures used and additional data (If any).
See Supporting Information for explanation of symbols and abbreviations.
Elevation Reference: Elevations were interpolated from a publicly available USGS
topographic map
Drill Rig
CME 75
Boring Started
01-21-2025
Boring Completed
01-21-2025
Logged by
PA
Hammer Type
Automatic, Hammer
Efficiency = 95%
Driller
Terracon Consultants
Sa
m
p
l
e
T
y
p
e
Pe
r
c
e
n
t
Fi
n
e
s
Un
c
o
n
f
i
n
e
d
Co
m
p
r
e
s
s
i
v
e
St
r
e
n
g
t
h
(
p
s
f
)
Wa
t
e
r
Co
n
t
e
n
t
(
%
)
Dr
y
U
n
i
t
We
i
g
h
t
(
p
c
f
)
Approximate Elevation: 4897 (Ft.)
LL-PL-PI
Atterberg
LimitsSeeExploration Plan
Latitude: 40.5624° Longitude: -105.0283°
Location:
Depth (Ft.)
Sw
e
l
l
-
C
o
n
s
o
l
/
Lo
a
d
(
%
/
p
s
f
)
Fi
e
l
d
T
e
s
t
Re
s
u
l
t
s
1
2
3
4897.3
4894
4878
4868.6
ASPHALT, about 8 inches thick
FILL - SANDY LEAN CLAY, dark brown
POORLY GRADED SAND WITH SILT AND
GRAVEL (SP-SM), with cobbles, tan to brown
with gray, red and pink, dense to very dense
CLAYSTONE BEDROCK,
dark gray, very hard
Boring Terminated at 29.4 Feet
Boring Log No. B-3
De
p
t
h
(
F
t
.
)
5
10
15
20
25
Wa
t
e
r
L
e
v
e
l
Ob
s
e
r
v
a
t
i
o
n
s
Facilities | Environmental |Geotechnical | Materials
Gr
a
p
h
i
c
L
o
g
Mo
d
e
l
L
a
y
e
r
8.4
974010
21.1
1.8
0.9
4.4
5.6
19.4
17.7
18.6
100
132
110
NP
51-20-31
0.7
4.0
20.0
29.4
+0.5/2006-10
16/12"
16-20-25
N=45
29-34
63/12"
18-26-25
N=51
11-50/5"
13-14-24
N=38
50/5"
50/5"
Abandonment Method
Borings were backfilled with cementitous flowable fill and
patched with asphalt
Advancement Method
4.25-inch inside diameter, continuous-flight, hollow-stem
augers
Liberty School Addition
1825 and 1901 Sharp Point Drive | Fort Collins, CO
Terracon Project No. 20245058
Water Level Observations
13 feet while drilling
7.7 feet at completion of drilling
Fort Collins, CO
1901 Sharp Point Dr Ste C
Notes
See Exploration and Testing Procedures for a description of field and laboratory
procedures used and additional data (If any).
See Supporting Information for explanation of symbols and abbreviations.
Elevation Reference: Elevations were interpolated from a publicly available USGS
topographic map
Drill Rig
CME 75
Boring Started
01-21-2025
Boring Completed
01-21-2025
Logged by
PA
Hammer Type
Automatic, Hammer
Efficiency = 95%
Driller
Terracon Consultants
Sa
m
p
l
e
T
y
p
e
Pe
r
c
e
n
t
Fi
n
e
s
Un
c
o
n
f
i
n
e
d
Co
m
p
r
e
s
s
i
v
e
St
r
e
n
g
t
h
(
p
s
f
)
Wa
t
e
r
Co
n
t
e
n
t
(
%
)
Dr
y
U
n
i
t
We
i
g
h
t
(
p
c
f
)
Approximate Elevation: 4898 (Ft.)
LL-PL-PI
Atterberg
LimitsSeeExploration Plan
Latitude: 40.5623° Longitude: -105.0286°
Location:
Depth (Ft.)
Sw
e
l
l
-
C
o
n
s
o
l
/
Lo
a
d
(
%
/
p
s
f
)
Fi
e
l
d
T
e
s
t
Re
s
u
l
t
s
1
2
3
4895.7
4889
4886
ASPHALT, about 4 inches thick
FILL - SANDY SILT (ML), dark brown
POORLY GRADED SAND WITH GRAVEL,
brown with gray, pink and red, medium dense
to dense
Boring Terminated at 10 Feet
Boring Log No. B-4
De
p
t
h
(
F
t
.
)
5
10
Wa
t
e
r
L
e
v
e
l
Ob
s
e
r
v
a
t
i
o
n
s
Facilities | Environmental |Geotechnical | Materials
Gr
a
p
h
i
c
L
o
g
Mo
d
e
l
L
a
y
e
r
51.8
20.4
20.8
6.5
13.5
107
103 NP
0.3
7.0
10.0
<-0.1/500
6-8
14/12"
3-4
7/12"
18-20-21
N=41
17-27
44/12"
Abandonment Method
Borings were backfilled with cementitous flowable fill and
patched with asphalt
Advancement Method
4-inch outside diameter, continuous-flight, solid-stem
augers
Liberty School Addition
1825 and 1901 Sharp Point Drive | Fort Collins, CO
Terracon Project No. 20245058
No free water observed
Water Level Observations
Fort Collins, CO
1901 Sharp Point Dr Ste C
Notes
See Exploration and Testing Procedures for a description of field and laboratory
procedures used and additional data (If any).
See Supporting Information for explanation of symbols and abbreviations.
Elevation Reference: Elevations were interpolated from a publicly available USGS
topographic map
Drill Rig
CME 75
Boring Started
01-21-2025
Boring Completed
01-21-2025
Logged by
PA
Hammer Type
Automatic, Hammer
Efficiency = 95%
Driller
Terracon Consultants
Sa
m
p
l
e
T
y
p
e
Pe
r
c
e
n
t
Fi
n
e
s
Un
c
o
n
f
i
n
e
d
Co
m
p
r
e
s
s
i
v
e
St
r
e
n
g
t
h
(
p
s
f
)
Wa
t
e
r
Co
n
t
e
n
t
(
%
)
Dr
y
U
n
i
t
We
i
g
h
t
(
p
c
f
)
Approximate Elevation: 4896 (Ft.)
LL-PL-PI
Atterberg
LimitsSeeExploration Plan
Latitude: 40.5625° Longitude: -105.0290°
Location:
Depth (Ft.)
Sw
e
l
l
-
C
o
n
s
o
l
/
Lo
a
d
(
%
/
p
s
f
)
Fi
e
l
d
T
e
s
t
Re
s
u
l
t
s
1
2
4894.7
4893
4885
ASPHALT, about 4 inches thick
FILL - SANDY LEAN CLAY, dark brown
POORLY GRADED SAND WITH GRAVEL, tan to
brown with gray, red and pink, medium dense
to very dense
Boring Terminated at 10 Feet
Boring Log No. B-5
De
p
t
h
(
F
t
.
)
5
10
Wa
t
e
r
L
e
v
e
l
Ob
s
e
r
v
a
t
i
o
n
s
Facilities | Environmental |Geotechnical | Materials
Gr
a
p
h
i
c
L
o
g
Mo
d
e
l
L
a
y
e
r
1.3
1.3
2.8
6.3
123
118
0.3
2.0
10.0
6-27
33/12"
17-32
49/12"
8-50/6"
32-47
79/12"
Abandonment Method
Borings were backfilled with cementitous flowable fill and
patched with asphalt
Advancement Method
4-inch outside diameter, continuous-flight, solid-stem
augers
Liberty School Addition
1825 and 1901 Sharp Point Drive | Fort Collins, CO
Terracon Project No. 20245058
No free water observed
Water Level Observations
Fort Collins, CO
1901 Sharp Point Dr Ste C
Notes
See Exploration and Testing Procedures for a description of field and laboratory
procedures used and additional data (If any).
See Supporting Information for explanation of symbols and abbreviations.
Elevation Reference: Elevations were interpolated from a publicly available USGS
topographic map
Drill Rig
CME 75
Boring Started
01-21-2025
Boring Completed
01-21-2025
Logged by
PA
Hammer Type
Automatic, Hammer
Efficiency = 95%
Driller
Terracon Consultants
Sa
m
p
l
e
T
y
p
e
Pe
r
c
e
n
t
Fi
n
e
s
Un
c
o
n
f
i
n
e
d
Co
m
p
r
e
s
s
i
v
e
St
r
e
n
g
t
h
(
p
s
f
)
Wa
t
e
r
Co
n
t
e
n
t
(
%
)
Dr
y
U
n
i
t
We
i
g
h
t
(
p
c
f
)
Approximate Elevation: 4895 (Ft.)
LL-PL-PI
Atterberg
LimitsSeeExploration Plan
Latitude: 40.5618° Longitude: -105.0282°
Location:
Depth (Ft.)
Sw
e
l
l
-
C
o
n
s
o
l
/
Lo
a
d
(
%
/
p
s
f
)
Fi
e
l
d
T
e
s
t
Re
s
u
l
t
s
1
2
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.0010.010.1110100
140
HydrometerU.S. Sieve Opening in Inches
Grain Size Distribution
ASTM D422 / ASTM C136
SandGravel
2 10 14 506 2001.5 83/4 1/23/8 30 403 601
U.S. Sieve Numbers
16 2044 10063
Grain Size (mm)
coarse fine coarse finemedium Silt or ClayCobbles
Pe
r
c
e
n
t
C
o
a
r
s
e
r
b
y
W
e
i
g
h
t
Pe
r
c
e
n
t
F
i
n
e
r
b
y
W
e
i
g
h
t
100
90
80
70
60
50
40
30
20
10
0
AASHTOUSCSUSCS Classification
A-7-6 (14)
A-1-a (0)
A-7-6 (33)
A-4 (0)
CL
SP-SM
CH
ML
SANDY LEAN CLAY
POORLY GRADED SAND with SILT and
GRAVEL
K
SANDY SILT
Facilities | Environmental |Geotechnical | Materials
41
NP
51
NP
0.66
25
NP
31
NP
16
NP
20
NP
%CobblesD60
5.952
0.12
D100
40.08
%Clay%Sand%Gravel
0.2
44.2
0.0
2.3
33.2
47.5
3.0
45.9
66.5
8.4
97.0
51.8
LL PL PI Cc Cu
0.0
0.0
0.0
0.0
D10
0.149
D30
0.763
9.5
37.5
4.75
12.5
%Fines %Silt
1901 Sharp Point Dr Ste C
Fort Collins, COTerracon Project No. 20245058
1825 and 1901 Sharp Point Drive | Fort Collins, CO
Liberty School Addition
Boring ID
2 - 3
4 - 5.5
24 - 24.4
4 - 5
B-2
B-3
B-3
B-4
2 - 3
4 - 5.5
24 - 24.4
4 - 5
Depth (Ft)Boring ID
B-2
B-3
B-3
B-4
Depth (Ft)
LAKE CENTER
2601 and 2609 Riverbend Court, 2600 Canton Court &
1901 Sharp Point Drive
Fort Collins, Larimer County, Colorado 80525
Prepared for:
Ogilvie Partners, LLC and
West Hampden Investors, LLC
November 15, 2021
Project Number: OGPICO001.01
CDN#3493A-001
Phase I Environmental Site Assessment
Lake Center
Fort Collins, Larimer County, Colorado
Blackstone Project: OGPICO001.01
i
EXECUTIVE SUMMARY
Rimkus Consulting Group, Inc., DBA Blackstone Consulting LLC (Blackstone) performed a Phase I
Environmental Site Assessment (Phase I ESA) of the Lake Center office buildings located at 2601, 2609
Riverbend Court, 2600 Canton Court and 1901 Sharp Point Drive in Fort Collins, Larimer County, Colorado
(site). Blackstone understands that this assessment is being performed as part of a potential acquisition.
The purpose of the Phase I ESA is to identify recognized environmental conditions (RECs) in accordance
with ASTM Standard E1527-13, and to evaluate other agreed-upon ASTM Non-Scope Considerations
(Business Environmental Risk Issues) as appropriate.
SITE INSPECTION
Porter P. Morgan
November 4, 2021
Ms. Terri Hanna, Property Manager, and Mr. Gregg Orth, Facilities
Manager, both with W.W. Reynolds Companies
SITE DESCRIPTION
2601 and 2609 Riverbend Court, 2600 Canton Court, and 1901 Sharp
Point Drive
City and State:
County:
Legal Description:
105007
105008
Owner(s):
Site Size:
Site Use:
s. The buildings are occupied by Terracon Consultants
assembly shop), Air Resource Specialists
office and light assembly of air sensors), Peak Precision Technologies,
Poehlmann Construction (office), MMS Environmental Labs
office and laboratory), Murphy Company (office), Reprographics, Inc.
– water-based inks), Custom Canvas (banner printing – water-
CDN#3493A-001
Phase I Environmental Site Assessment
Lake Center
Fort Collins, Larimer County, Colorado
Blackstone Project: OGPICO001.01
39
10.0 CONCLUSIONS AND RECOMMENDATIONS
Blackstone performed a Phase I ESA of the site in conformance with the scope and limitations of ASTM
Standard Practice E1527-13, the regulations at 40 CFR Part 312, and the October 27th, proposal
(Agreement) between Ogilvie Partners, LLC and Blackstone. Any exceptions to or deletions from this
practice are described in Sections 1.2 through 1.4 of this report. This assessment has revealed no evidence
of recognized environmental conditions (RECs), controlled recognized environmental conditions (CRECs),
or historical recognized environmental conditions (HRECs) connection with the site.
The following historical recognized environmental condition (HREC) was identified in connection with the
site:
Impacts from Former Tenant PCB Colorado (2601 Riverbend Court): As previously discussed,
limited soil impacts were identified and remediated from two areas of this former tenant
operation, with confirmation soil sampling performed. Additional soil and groundwater
investigations performed did not identify any additional contaminants on the site. Based on the
results of the investigations and remedial action completed on the site, with no elevated
contaminants remaining, the former impacts to the soil beneath the site are considered an HREC.
The following Business Environmental Risk Issues were identified in connection with the site:
Monitoring Well(s): One monitoring well was observed in the parking lot on the site during the
current inspection. This well is presumed to be one of the three wells installed as a part of the
investigations performed on the site in 1990 and 1991; however, the other two wells were not
observed. Based on the reported results of the groundwater investigations performed in 1990
and 1991, this remnant well is not considered as REC. However, Blackstone has not reviewed
records related to the proper abandonment of the wells on the site. As such, the presence of the
well(s) is considered a Business Environmental Risk Issue. All of the former well locations should
be identified, and the wells should be properly abandoned in accordance with all applicable
regulations.
Chemicals and Materials Storage: Blackstone observed several areas of stored chemical
containers without secondary containment. The stored materials were observed in good
condition with no evidence of spills or leaks; therefore, the stored materials are not considered a
REC. However, all chemicals should be properly stored in appropriate cabinets and with secondary
containment equipment to minimize the impact of any release.
CDN#3493A-001
SHARP POINT
1825 Sharp Point Drive
Fort Collins, Larimer County, Colorado 80525
Prepared for:
Ogilvie Partners, LLC and
West Hampden Investors, LLC
November 15, 2021
Project Number: OGPICO001.05
CDN#3493A-002
Phase I Environmental Site Assessment
Sharp Point
Fort Collins, Larimer County, Colorado
Blackstone Project: OGPIC001.05
i
EXECUTIVE SUMMARY
Rimkus Consulting Group, Inc., DBA Blackstone Consulting LLC (Blackstone) performed a Phase I
Environmental Site Assessment (Phase I ESA) of the flex space commercial building located at 1825 Sharp
Point Drive in Fort Collins, Larimer County, Colorado (site). Blackstone understands that this assessment
is being performed as part of a potential acquisition. The purpose of the Phase I ESA is to identify
recognized environmental conditions (RECs) in accordance with ASTM Standard E1527-13, and to evaluate
other agreed-upon ASTM Non-Scope Considerations (Business Environmental Risk Issues) as appropriate.
SITE INSPECTION
Porter P. Morgan
November 4, 2021
Ms. Terri Hanna, Property Manager, and Mr. Gregg Orth, Facilities
Manager, both with W.W. Reynolds Companies
SITE DESCRIPTION
1825 Sharp Point Drive
Fort Collins, Colorado
Larimer
Larimer County Assessor Parcel Identification Number: 8720105004
PP Sharp Point, LLC
Approximately 1.811 acres
The site is improved with a single-story, multi-tenant flex space
commercial facility. The building is occupied by Onix IT (office), Niner (bike
, and Turning Point Spinal Care (medical office). No
fabrication, repair, and/or manufacturing activities take place
site.
Year(s) Built:
Structure(s) Location
On Site (approx. square feet)
Site Building
Central 1 19,226
CDN#3493A-002
Phase I Environmental Site Assessment
Sharp Point
Fort Collins, Larimer County, Colorado
Blackstone Project: OGPIC001.05
32
10.0 CONCLUSIONS AND RECOMMENDATIONS
Blackstone performed a Phase I ESA of the site in conformance with the scope and limitations of ASTM
Standard Practice E1527-13, the regulations at 40 CFR Part 312, and the October 27th, proposal
(Agreement) between Ogilvie Partners, LLC and Blackstone. Any exceptions to or deletions from this
practice are described in Sections 1.2 through 1.4 of this report. This assessment has revealed no evidence
of recognized environmental conditions (RECs), controlled recognized environmental conditions (CRECs),
or historical recognized environmental conditions (HRECs) connection with the site.
CDN#3493A-002
Erosion Control Report
Liberty Common Junior High
Elevation Consulting Page
20
APPENDIX B
CONTAMINANTS
OF CONCERN
TABLE
Materials Stormwater Pollutants Potential Pollutants BMP
Bedding Stockpiles Sediment Entire site Silt Fence/ Dust
Control
Boring Opterations,
Concrete Cutting
Operations or Other
Operations that use
Water
Sediment, slurry,
concrete fines,
processed water, etc.
Bore sites, site
perimeters, pothole
locations, etc.
Optimize water use,
excess water shall be
treated by perimeter
protection
Carpentry and
Framing
Wood, solvents, stains,
debris
Building construction Good Houskeeping
practices
Concrete Materials
and Concrete Waste
Management
Concrete Entire site Concrete Washout
Concrete Curing Curing compound Areas of concrete
construction
Good Housekeeping
practices
Demolition and
Debris Disposal
Trash, sediment, various
other contaminants
Existing building
areas
Good Housekeeping
practices
Dewatering and
Ponded Water
Management
Groundwater and
ponded water containing
various other pollutants
Entire site Implementation of
dewatering plan if
encountered
Form Oil and
Concrete Forms
Form oil Building construction Good Housekeeping
practices
Generators Oil, Gasoline, etc. Entire site Storage under cover
within Existing
Parking Lot
Grading Operations
(Clearing,
Excavating, etc.)
Sediment Entire site Silt Fence, Vehicle
Tracking Pad, Street
Sweeping, Dust
Control, Surface
Roughening
Hazardous Waste Fire Retardant, Acid
Wash, Graffiti
Prevention Liquid,
Processed Water
Building construction Good Housekeeping
practices
HVAC Debris, Glue, etc. Building construction Good Housekeeping
practices
Insulation Fiberglass, other debris Building construction Good Housekeeping
practices
Landscape Products Fertilizers, herbicides,
pesticides, fungicides,
etc.
Entire site Application per
manufacturer’s
recommendations
Masonry Cement, grout, masonry
mixers, sand stockpiles,
etc.
Building construction Good Housekeeping
practices
Material Delivery Other materials Entire site Vehicle Tracking Pad
and Existing Parking
Lot
Painters Paint, primers, stains,
glue
Building construction Good Housekeeping
practices
Paving Operations Asphalt, tar, road base,
lime
Roadways and
parking areas
Contain and properly
dispose of excess
materials
Plumbing Trash, glue, solder Building construction Good Housekeeping
practices
Processed Water Any number of
chemicals or other
toxins
Entire site Optimize water use,
excess water shall be
treated by perimeter
protection
Roofing Asphalt, wood, concrete Building construction Good Housekeeping
practices
Sanitary Waste
Management
Sanitary waste Building construction
and staging areas
Good Housekeeping
practices
Soil Stockpiling Sediment Entire site Vehicle Tracking Pad
Stucco, Plastering,
Drywalling
Drywall, plaster, tool
cleaning, etc.
Building construction Good Housekeeping
practices
Trash Debris, bacteria, various
chemicals, etc.
Building construction
and staging areas
Good Housekeeping
practices
Utility Excavations Sediment, fuel, oil Entire site Silt Fence for
sediment, Good
Housekeeping
practices for fuel, oil
Vehicle and
Equipment
Maintenance,
Cleaning, or Leaks
Fuel, oil, grease,
chemicals, hydraulic oil
Entire site Good Housekeeping
practices
Erosion Control Report
Liberty Common Junior High
Elevation Consulting Page
21
APPENDIX C
SPILL PREVENTION
AND CONTROL PLAN
Page 1 of 7
SPILL PREVENTION AND CONTROL PLAN
SPILL PREVENTION and CONTROL PLAN
Whenever significant quantities of fuels, materials, vehicle fluids, or other pollutants are
to be used on site, specific procedures for material containment and spill prevention
shall be developed and implemented.
Introduction
The following Spill Prevention and Response Plan shall be implemented during the
construction of the Liberty Common Junior High. This plan will be implemented to meet
the requirements of the Colorado Department of Public Health and Environment Water
Quality Control Division.
Materials On-Site
Spill control procedures will be implemented when materials are stockpiled or when
chemicals and/or fluids are used in the construction area.
Stockpiles of Dry Materials
The following spill prevention procedures shall be implemented:
All materials shall be stockpiled in designated areas, with BMPs used to reduce and
minimize the runoff of contaminants. BMPs such as silt fence and sediment control logs
will be installed according to Colorado Department of Transportation criteria using the
details shown in the Stormwater Pollution Prevention plans. Loading and unloading
operations shall be performed in a manner to limit materials from being spilled. Any
spilled materials shall be swept up immediately after the operations are performed.
Vehicle Fueling
The following spill prevention procedures shall be implemented:
All vehicle fueling will be done off-site as much as possible. All on-site fueling
operations will be performed in designated areas. Measures will be taken where
necessary to reduce and minimize spills during vehicle fueling operations. These
measures may include the placement of a temporary berm around the fueling area,
covering the fueling area under a temporary portable structure, and/or the placement of
drip pans under valves and tank openings. Berms will be constructed around all fueling
areas. An adequate supply of absorbents will also be stockpiled at each fueling area.
Routine Vehicle and Equipment Maintenance
The following spill prevention procedures shall be implemented:
Page 2 of 7
All vehicle maintenance will be performed off-site when possible. However, there may
be occasions where construction equipment and vehicles may break down at the site
and on-site repairs are more feasible. On-site vehicle and equipment maintenance, if
needed, will be performed in designated areas, where practical, and enclosed by
earthen berms. All maintenance areas will maintain an adequate supply of drip pans.
These pans will be placed underneath vehicles as needed and absorbents will be used
in the event of a minor spill or leak.
SPILL RESPONSE
NOTE: IN CASE OF FIRE, EVACUATE ALL PERSONNEL FROM THE IMMEDIATE AREA,
RENDER FIRST AID TO ANYONE WHO IS INJURED, AND DIAL 911 IMMEDIATELY. TAKE
APPROPRIATE STEPS TO PROTECT HUMAN LIFE AND TO CONTROL FIRES FIRST.
SPILL CONTROL IS A SECONDARY CONCERN.
Cleanup and Removal Procedures
• Upon detection of any spill, the first action to be taken is to ensure personal safety. All
possible ignition sources, including running engines, electrical equipment (including
cellular telephones, etc.), or other hazards will be immediately turned off or removed
from the area. The extent of the spill and the nature of the spilled material will be
evaluated to determine if remedial actions could result in any health hazards, escalation
of the spill, or further damage that would intensify the problem. If such conditions exist,
a designated employee will oversee the area of the spill and the construction supervisor
will be notified immediately.
• The source of the spill will be identified and if possible the flow of pollutants stopped if
it can be done safely. However, no employee will attend to the source or begin cleanup
of the spill until ALL emergency priorities (fire, injuries, etc.) have been addressed.
Small Spills
Small spills (usually <5 gallons) consist of minor quantities of gasoline, oil, anti-freeze,
or other materials that can be cleaned up by a single employee using readily available
materials.
The following procedures shall be used for clean up of small spills:
1. Ensure personal safety, evaluate the spill, and if possible, stop the flow of pollutants.
2. Contain the spread of the spill using absorbents, portable berms, sandbags, or other
available measures.
3. Spread absorbent materials on the area to soak up as much of the liquid as possible
and to prevent or minimize infiltration into the soil.
Page 3 of 7
4. Once the liquids have been absorbed, remove all absorbents from the spill and place
the materials in a suitable storage container. On paved areas, wipe any remaining
liquids from the surface and place the materials in a storage container.
Do not spray or wash down the area using water. For open soil areas, excavate any
contaminated soil as soon as possible and place the soil in a suitable storage container.
All materials will then be transported off-site for disposal.
5. If immediate transfer and storage of the contaminated soil is not practical, excavate
and place the contaminated soil on a double thickness sheet of 3-mil or higher
polyethylene film. In addition, a small berm should be formed around the outer edges of
the soil stockpile, underneath the polyethylene film, to ensure that contaminants are not
washed from the site during precipitation events and that materials do not seep through
the berm.
6. Record all significant facts and information about the spill, including the following:
• Type of pollutant
• Location
• Apparent source
• Estimated volume
• Time of discovery
• Actions taken to clean up spill
Medium to Large Spills
Medium to large spills consist of larger quantities of materials (usually >5 – 25 gallons)
that are used on site that cannot be controlled by a single employee. Generally, a
number of facility personnel will be needed to control the spill and a response may
require the suspension of other facility activities.
The following procedure shall be used for the cleanup of medium to large spills:
1. Ensure personal safety, evaluate the spill, and if possible, stop the flow of pollutants.
2. Immediately dispatch a front-end loader or similar equipment to the spill and
construct a berm or berms down gradient of the spill to minimize the spread of potential
pollutants. On paved surfaces, portable berms, sandbags, booms, or other measures
will be used to control the lateral spread of the pollutants.
3. When the spread of the spill has been laterally contained, contact the supervisor or
designated facility employee and provide them information on the location, type, and
amount of spilled material, and a briefing on the extent of the spread and measures
undertaken to contain the contaminants.
4. Depending on the nature of the spill, mobilize additional resources as needed to
contain the contaminants.
Page 4 of 7
5. Cleanup will commence when the lateral spread has been contained and the
notification to the supervisor has been made.
6. Freestanding liquid will be bailed or pumped into 55-gallon storage drums, steel
tanks, or other suitable storage containers. When all the liquid has been removed from
the pavement or soil layer, absorbents will be applied to the surface and transferred to
the storage containers when they have soaked up as much of the spill as possible.
7. On paved surfaces, the remaining contaminants will be removed to the extent
possible, with rags, sweeping, or similar measures. The area of the spill will not be
sprayed or washed down using water. Any contaminant soaked materials will be placed
into the storage containers with the other absorbents.
8. The remaining contaminated soils will be excavated and loaded into a dump truck(s)
for disposal off-site at a designated facility. If transport off-site is not immediately
available, the remaining soils will be stockpiled on a double thickness sheet of 3-mil or
higher polyethylene film. In addition, a small berm will be formed around the outer
edges of the soil stockpile, underneath the polyethylene film, to ensure that
contaminants are not washed from the site during precipitation and do not seep through
the berm.
9. Record all significant facts and information about the spill, including the following:
• Type of pollutant
• Location
• Apparent source
• Estimated volume
• Time of discovery
• Actions taken to clean up spill
NOTIFICATION
Notification to the Colorado Department of Public Health & Environment (CDPHE) is
required if there is any release or suspected release of any substance, including oil or
other substances that spill into or threaten State waters. Unless otherwise noted,
notifications are to be made by the supervisor and only after emergency responses
related to the release have been implemented. This will prevent misinformation and
assures that notifications are properly conducted.
The notification requirements are as follows:
1. Spills into/or Threatens State Waters: Immediate notification is required for
releases that occur beneath the surface of the land or impact or threaten waters of the
State of threaten the public health and welfare. Notifications that will be made are:
a. For any substance, regardless of quantity, contact CDPHE at 1-877-518-
5608. State as follows:
Page 5 of 7
a) Give you name.
b) Give location of spill (name of city).
c) Describe the nature of the spill, type of products, and estimate size of spill.
d) Describe type of action taken thus far, type of assistance or equipment
needed.
b. For any quantity of oil or other fluids, call the National Response Center at
1-800-424-8802. State as follows:
a) Give your name.
b) Give location of spill (name of city and state).
c) Describe the nature of the spill, type of product, and estimate size of spill.
d) Describe type of action taken thus far, type of assistance or equipment
needed.
2. Reportable Quantity Spill on Land Surface: Immediate notification is required of a
release upon the land surface of an oil in quantity that exceeds 25 gallons, or of a
hazardous substance that equals or exceeds 10 pounds or its reportable quantity under
Section 101(14) of the Comprehensive Environmental Response, Compensation
Liability Act (CERCLA) of 1980 as amended (40 CFR Part 302) and Section 329 (3) of
the Emergency Planning and Community Right to Know Act of 1986 (40 CFR Part 355)
whichever is less. This requirement does apply at a minimum to the substances listed in
Table A below.
TABLE A
Substances Requiring Notification
SUBSTANCE REPORTABLE QUANTITY
Motor Oil 25 Gallons
Hydraulic Oil 25 Gallons
Gasoline/Diesel Fuel 25 Gallons
The notification procedures to be followed are:
a) Give your name.
b) Give location of spill (name of city and state).
c) Describe nature of the spill, type of product, and estimate size of spill.
d) Describe type of action taken thus far, type of assistance or equipment
needed.
e) Give name of land owner
f) Specify department responsible for any facilities that may be impacted
3. Notification is not required for release of oil upon the land surface of 25 gallons or
less that will not constitute a threat to public health and welfare, the environmental or a
threat of entering the waters of the State.
4. Notification, as required in paragraphs 1 and 2 above, will be made to the
CDPHE using the 24-hour telephone number to report environmental spills. All
information known about the release at the time of discovery is to be included, such as
Page 6 of 7
the time of occurrence, quantity and type of material, location and any corrective or
clean-up actions presently being taken. Table B lists these phone numbers.
SPILL RESPONSE CONTACTS
TABLE B
Emergency Notification Contacts
Name/Agency Number
Fire Department 911
Police Department 911
Ambulance 911
Hospital 911
National Response Center 1-800-424-8802
CDPHE-Report Environmental Spills (24 hrs/day) 1-877-518-5608
Colorado Emergency Planning Committee 303-273-1622
It is the responsibility of the supervisor to contact the CDPHE, and/or the National
Response Center.
• The National Response Center is to be contacted when a release containing a
hazardous substance or oil in an amount equal to or in excess of a reportable quantity
established under either 40 CFR 110, 4- DFR 117, or 40 CFR 302 occurs during a 24-
hour period.
• Notification to the CDPHE is required if there is any release or suspected release of
any material, including oil or hazardous substances that spill into or threaten state
waters.
REPORTS
The CDPHE requires written notification of a spill or discharge of oil or other substance
that may cause pollution of the waters of the State of Colorado. A written report must be
submitted to the Water Quality Control District (WQCD) within five days after becoming
aware of the spill or discharge.
The CDPHE requires a written final report within 15 days for all releases of an oil or
hazardous substance that require implementation of a contingency plan. The CDPHE
may also require additional reports on the status of the clean up until any required
remedial action has been complete.
Written notification of reports must contain at a minimum:
1. Date, time, and duration of the release.
Page 7 of 7
2. Location of the release.
3. Person or persons causing and responsible for the release.
4. Type and amount of oil or substance released.
5. Cause of the release.
6. Environmental damage caused by the release.
7. Actions taken to respond, contain, and clean up the release.
8. Location and method of ultimate disposal of the oil or other fluids.
9. Actions taken to prevent a reoccurrence of the release.
10. Any known or anticipated acute or chronic health risks associated with the
release.
11. When appropriate advice regarding medical attention necessary for exposed
individuals.
Erosion Control Report
Liberty Common Junior High
Elevation Consulting Page
22
APPENDIX D
BMP INSTALLATION
AND REMOVE
SEQUENCE CHART
Initial Final
1 2 3 4 5 6 7
Silt Fence SF intercept/filter sediment laden runoff I M M M R
Construction Fence CF Prevent public from accessing construction site I M M M M M R
Stockpile Management SP temporary storage of cut and import material X X X X
Vehcile Tracking Control VTC Minimize tracking of mud and sediment onto paved surfaces I M M M R
Concrete Washout Area CWA isolate concrete truck washout operations I M M R
Rock Sock RS intercept/filter sediment laden runoff within Street curb and gutter I M M M M M R
Inlet Protection IP prevent sediment from entering storm drainage system I M M M M M R
Surface Roughing SR
Create a series of grooves or furrows on the contour in disturbed,
graded areas to trap runoff and reduce the formation of rill and gully
erosion. Also used to minimize sediment transport via wind
X X X X
Sod/Landscape Stabilization LS
Provide soil protection through new plant growth (sod), plantings,
trees, mulching (rock or wood mulch)I, M
Dust Control N/A Privides minor detention of sediment X X X X X X X X
Street Sweeping SS
Utilized to remove sediment on Public streets and to prevent
sediment from entering storm drainage system X X X X X X X X
Sequence
Interim
Use Legend: I - Install, M - Maintain, R- Remove
Sequences: 1 - Pre-Disturbance & Site Access, 2 - Demolition, 3 - Grading and Excavation, 4 - Building Construction, 5 - Utility Construction and Paving, 6 -
Final Grading, 7 - Landscaping & Installtion of Final Stabilization Measures
BMP as
DesignedControl BMP and Application Symbol Description
Liberty Common Junior High
prevent pollution associated with solid, liquid and hazardous Good Housekeeping Practices N/A
X X X X X X XX
Erosion Control Report
Liberty Common Junior High
Elevation Consulting Page
23
APPENDIX E
INSPECTION REPORT
Erosion Control Report
Liberty Common Junior High
Elevation Consulting Page
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APPENDIX F
SWMP PLANS AND
DETAILS
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Project: Disturbed Acres:1.33
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
L.F.496 $2.50 $1,240.00
L.F.117 $20.00 $2,340.00
EA 1 $250.00 $250.00
EA 1 $2,500.00 $2,500.00
EA 3 $50.00 $150.00
L.F.1177 $3.00 $3,531.00
AC 0.53 $600.00 $318.00
Sub-Total:$10,329.00
1.5 x Sub-Total:$15,493.50
Amount of security:$15,493.50
Total Acres x Price/acre:$3,325.00
$2,500.00 Sub-Total: $3,325.00
1.5 x Sub-Total:$4,987.50
Amount to Re-seed:$4,987.50
Minimum escrow amount:$3,000.00
Erosion Control Escrow:$15,493.50
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
BMP Amount
Silt Fence (SF)
Vehicle Tracking Control (VTC)
Rock Sock (RS)
Reseeding Amount
Construction Fence (CF)
Miniumum Escrow Amount
Liberty Common Junior High
Unit Price of Seeding per acre:
“The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times the
cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid, whichever
is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three thousand
dollars ($3,000) for commercial development”
Inlet Protection (IP)
Concrete Washout (CW)
Surface Roughening (SR)
Final Escrow Amount
7/1/2025 8:13 AM Z:\Shared\PROJECTS\2024020 - Liberty Common Junior High\4-Reports\SWMP\2024020_EC Escrow Cost Estimate.xls
7/02/25