HomeMy WebLinkAboutCHRISTIAN BROTHERS AUTOMOTIVE - PDP - PDP170018 - SUBMITTAL DOCUMENTS - ROUND 1 - EROSION CONTROL LETTER/REPORTPrepared For:
CHRISTIAN BROTHERS AUTOMOTIVE CENTER
17725 KATY FREEWAY, SUITE 200
HOUSTON, TX 77094
BLOCK 1– UPLANDS PROSPECT BUSINESS PARK P.U.D.
FORT COLLINS, CO
PDP EROSION CONTROL REPORT
May 17, 2017
Job #co 15298
PROJECT
SITE
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I. GENERAL LOCATION AND DESCRIPTION
A. Erosion Analysis
The site is currently an undeveloped platted lot of 1.147 acres. The site slopes away
from Prospect Road and Academy Court, towards the east and northeast. The site is
sparsely, to moderately vegetated with native grasses and weeds. The site appears to be
mowed at least annually and non-irrigated. The eastern 40.5-feet of the lot is covered
by a utility easement containing City of Fort Collins sanitary and storm sewer mains, the
eastern portion of the easement contains a PRPA transmission line. The Colorado and
Southern Railroad lies further east in the easement, Prospect Road to the south, and
Academy Court to the west. The NRCS Soil Resource Report classifies the soil as well
drained. Currently, site drainage is conveyed in an existing storm system to Spring
Creek.
A light automotive service and repair facility is proposed for the site. Construction of the
project is expected to disturb approximately 0.735 acres. Construction will consist of
stripping and stocking topsoil, site grading, utility service extensions, hardscape, paving,
building construction and landscaping. Site grading will direct all runoff to a detention
pond proposed on the east side of the project site. The pond will function as a sediment
basin during construction. Additional sediment and erosion control measures will
include a fiber roll on the downhill edge of disturbance, a vehicle sediment tracking pad
at the site entrance, a concrete washout near the project entrance, and inlet protection
within the projects influence area. The fiber roll and inlet protection will be installed
prior to earth disturbing activities, the vehicle tracking pad, concrete washout and
sediment pond will be constructed during grading operations and prior to site
improvements.
B. Storm water Management Controls
The site will implement fiber rolls on the downstream edge of all disturbed areas prior
to land disturbance. Existing inlets shall have sediment filters installed to control
conveyance of sediments into the existing storm sewer system; these will also be
installed prior to land disturbance activities. When land disturbance begins a vehicle
tracking control pad will be installed at the construction entrance. Once the detention
pond and bio-swale are graded this area will be use as a sediment pond during
construction. A concrete wash out will be installed prior to construction activities.
i. The site SWMP Administration will be the General Contractor selected for the project
build out.
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Christian Brothers Automotive Corporation’s Project Manager’s contact information is
provided below until the General Contractor is selected.
Derrick Rodgers, Project Manager
Cell number: 281-381-2497
Fax number: 281-675-6132
Address: 17725 Katy Freeway, Suite 200, Houston, TX 77094
Email: Derrick.Rodgers@cbac.com
ii. Sources of Potential Pollutant Sources are sediment contained in storm water runoff.
Sediment will be controlled by a BMP selection of Fiber Rolls, Inlet Socks, Vehicle
Tracking Control pad, Concrete Washout and site watering.
1. Disturbed and stored soils: The project disturbed soil areas will be
approximately 0.74 acres. Typically these sites do not have stockpiles, if there
are the topsoil will be stripped in the disturbance area and stockpiled at the
north end of the lot. The stockpile will have a fiber roll installed around the toe
of the slope.
2. Vehicle tracking of sediments: The site will have a single, dedicated access
entrance with a VTC pad. Any tracked sediment on paved City streets will be
removed by sweeping and scraping at the end of day as necessary. An existing
inlet to the north on Academy Court will have sediment protection installed
prior to construction activities and will be inspected on a scheduled basis and
after each storm event.
3. Management of contaminated soils: There are no known contaminated soils on
the site. If contaminated soils are located the project Geotech will be notified to
look at the contaminated area and advise of disposal procedures.
4. Loading and unloading operations: Due to the size of the site, equipment and
materials will be unloaded on the street as much as possible for the project
duration. Any movement of soil from the site will be removed as described in
ii.2.
5. Outdoor storage activities: There will be minimal storage of building materials.
Any movement of soil from the site will be removed as described in ii.2.
6. Vehicle and equipment maintenance and fueling: Site dirt work will be minor
and short term, maintenance and fueling will take place once a day in a
controlled area. Most of the project equipment are rentals and are in good
working order when onsite.
7. Significant dust or particulate generating processes: The site will be watered
regularly during grading operations. Once grading is complete, Curb and Gutter,
and paving of the parking lot will be completed, further reducing dust or
particulate occurrences.
8. Routine maintenance activities involving fertilizers, pesticides, detergents, fuels,
solvents, oils, etc: It is not anticipated any of these materials will be used for
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routine maintenance activities. Any losses will be swept and properly disposed
of.
9. On-site waste management practices: On-site wastes will be collected in
approved rented receptacles located near the construction entrance for ease of
removal.
10. Concrete truck/equipment washing, including the concrete truck chute and
associated fixtures and equipment: A concrete washout area will be provided
near the construction entrance.
11. Dedicated asphalt and concrete batch plants: THERE WILL BE NO BATCH PLANT
ON SITE.
12. Non-industrial waste sources: These will be provided near the construction
entrance and separated from the construction waste collection containers.
13. Other areas or procedures where potential spills can occur: There are none
known or anticipated on this site.
C. Establishment of Dryland Vegetation
Due to this site being an infill project, there will be minimal disturbance in areas that will
be left in a dryland vegetation state. Per the NRCS Soil Resource Report, the site consists
of Kim loam, Larim gravelly sandy loam and Stoneham loam. These loams are all well
drained, Hydrologic Group B soils. Areas of slope grading to existing surface, and areas
outside of the landscape limits that have been disturbed will receive as least six (6)
inches of topsoil from the on-site stock pile. Dryland vegetation reseeding will consist of
the Flatlands, Standard Mix as recommended by Larimer County. This seed mix does not
typically need soil amendments but will be mulched with crimped straw or hay where
slopes are less than or equal to 3:1. Supplemental watering is available if needed to
insure establishment in non-landscaped areas. The rest of the areas not paved or
occupied by the building will be landscaped.
D. Detailed Sequence of Construction Activities
A sequence of construction activities chart is included with this report and copied onto
the erosion and sediment control plan.
E. Erosion Control Security Calculations
The Calculations for Erosion and Sediment Control Escrow/Security is included with this
report. The sequence is typical of the order stated on the erosion control report and
drawing requirements.
II. References
1. City of Fort Collins, Colorado, Erosion Control Report and Drawings Requirements Accompanying
Document.
2. City of Fort Collins, Colorado, Erosion Control Report and Drawings Submittal Requirements
Check Sheet.
Mobilization Demolition Grading
Utilities
Installation
Flat work
Installation
Vertical
Installation Landscape Demobilization
Best Management Practices (BMPs)
Structural "Installation"
Silt Fence Barriers*
Contour Furrows (Ripping / Disking) N/A N/A N/A N/A N/A N/A N/A N/A
Sediment Trap / Filter
Vehicle Tracking Pad* N/A N/A N/A N/A N/A N/A N/A N/A
Flow Barriers (Wattles)* N/A N/A N/A N/A N/A N/A N/A N/A
Inlet Filter Bags*
Rock Bags*
Terracing N/A N/A N/A N/A N/A N/A N/A N/A
Stream Flow Diversion* N/A N/A N/A N/A N/A N/A N/A N/A
Rip Rap
Collecting Asphalt / Concrete Saw Cutting Waste
*All BMPs to be Removed once Construction is Complete.
Vegetative
Temporary Seeding Planting
Mulching/Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting/Blankets/Mats
Other:
Erosion Control Report and Drawings
Submittal Requirements Check Sheet
JS 6/2015
Erosion Control Report
Written Analysis of the site including…
Current Developed Conditions
Detailed and Site Specific
Existing Percent Vegetation
Nature and Purpose of Construction
Detailed and Site Specific
Total Disturbed Area (Onsite and Off)
Closest Receiving Waters (Path to those waters)
Rainfall Erodibility & Erosion Sediment Control Methods
Analysis of Temporary & Permanent Mitigation
Methods
Timing (Phases) & Sequence of BMP Installation
Sequence Chart …or…
Separate Sheets for each sequence
Choice of BMPs to minimize sediment transport
Source of Non Stormwater Discharge
Extra Site Data
(Soil Boring/Lab Tests/Groundwater Levels)
Stormwater Management Controls (SWMC)
Description of all SWMC
Appropriate & Priority of all SWMC
Identify the SWMP Administrator
Identify Potential Pollutant Sources
(Identify and Describe the Means of Control)
Disturbed and Stored Soils
Vehicle tracking of sediment
Management of contaminated soils
Loading and unloading operations
Outdoor storage activities
Equipment maintenance and fueling
Significant particulate generating
Routine maintenance activities
On-site waste management
Concrete washing
Dedicated asphalt or concrete batch plants
Non-industrial waste sources (worker trash and
portable toilets)
Other potential spills
Dry land vegetation
Soil Types
Seed Mixes
Soil Amendments
Mulches
Detailed sequence of construction activities
Sequence of all land disturbing activity chart
Categories such as: Soil Stockpiling; Drainage Facility;
Maintenance activities; Sediment basins; temporary
channel stabilization; Seeding; Mulching; etc…
Report Redlines have been corrected from prior submittal
N/A
Erosion Control Plans
Clear and uncluttered plans
General Location Map
22”x34” Drawing
Scale 1”=1000’ to 1”=8000’
Must identify any major construction along the drainage
SEQUENCE OF CONSTRUCTION ACTIVITY
Mobilization Demolition Grading
Utilities
Installation
Flat work
Installation
Vertical
Installation Landscape
Demobilizatio
n
(Construction
Phases)
Best Management Practices (BMPs)
Structural "Installation"
Silt Fence Barriers*
I prefer fiber or straw waddles over silt fence, do you have a
preference?
Contour Furrows (Ripping / Disking) N/A N/A N/A N/A N/A N/A N/A N/A I don't antisipate this.
Sediment Trap / Filter I have identified 2 inlets.
Vehicle Tracking Pad* N/A N/A N/A N/A N/A N/A N/A N/A 1
Flow Barriers (Wattles)* N/A N/A N/A N/A N/A N/A N/A N/A
There will be a swale to the detention pond rather than storm sewer, I
will design and let you know
Inlet Filter Bags* Your preference
Rock Bags* Your preference
Terracing N/A N/A N/A N/A N/A N/A N/A N/A none
Stream Flow Diversion* N/A N/A N/A N/A N/A N/A N/A N/A none
Rip Rap buried at curb cut and installed at drop from swale to detention pond
Collecting Asphalt / Concrete Saw Cutting Waste at entrance
*All BMPs to be Removed once Construction is Complete.
Vegetative
Temporary Seeding Planting none antisipated
Mulching/Sealant none antisipated
Permanent Seeding Planting Landscape plan
Sod Installation Landscape plan
Rolled Products : Netting/Blankets/Mats none antisipated
Other:
Ditches, Extended Detention, Culverts, Storm sewers…
Basins Divided into Topography
Erosion Control Plans
22”x34” Drawing
Scale 1”=20’ to 1”=200’
Sequence Plans indicating timing, extent and location, of
the temporary BMPs
Standard construction details and notes of erosion and
sediment control measures
Job-specific construction details and notes of erosion and
sediment control measures
List vegetative specification from either Urban Drainage
Manual, or alternative sources.
List structural specification from the Urban Drainage
Manual, or other specifications and a justification if an
alternative is sought after.
A construction detail for ALL proposed construction BMPs.
The ‘standard erosion and sediment control notes’ are
included on the plan set.
Plan Redlines have been corrected from prior submittal
N/A
Erosion control security calculations
BMP Amount Calculated
All BMPs Calculated
Estimated Quantity and Price are realistic
1.5 Times the estimated BMP controls
Reseeding Amount Calculated
All Disturbed Area Calculated
Estimated Area and Price are realistic
1.5 Times the estimated reseeding
Higher of the BMP, Reseeding, or Minimum Selected
(Final Erosion Control Number needs to be sent to City Engineer
for the Project in order to be reflected in the Development
Agreement)
Escrow Redlines have been corrected from prior submittal
N/A