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HomeMy WebLinkAboutSite Certifications - 01/07/2022 December 3, 2021 Mr. Matt Simpson City of Fort Collins Storm Water Division 700 Wood Street Fort Collins, CO 80522 (970) 416-2754 Re: Overall Site and Drainage Certification for UCH Harmony Campus LINAC Expansion, Fort Collins Colorado Dear Mr. Simpson, The purpose of this letter is to provide the lot grading certification, and overall site and drainage certification for the UCH LINAC Expansion for the building, parking lot and raingarden improvements, within the Harmony Medical Campus, located in Fort Collins, Colorado. Building Description Address Building Permit No. LINAC Building, Parking Lot improvements & LID 2121 Harmony Road B2000785 Aspen Engineering reviewed the record surveys, prepared by Lamp Rynearson, Inc. Survey measurements for the east parking lot improvements and LID are dated September 10, 2021. The building improvements and west parking lot survey is dated November 30, 2021. Aspen also visited the project site multiple times between July 9, 2021, and September 2, 2021, to visually observe grading adjacent to the LINAC Building expansion, parking lot, and raingarden improvements. Based on the provided record survey and visual observation, Aspen Engineering asserts that the as-built grading around LINAC Building expansion and the raingarden improvements appear to meet the intent of the approved grading and drainage plans. It’s important to note that the as-built survey data was obtained prior to landscaping was initiated and observation of conditions was done after landscaping was installed. Please refer to the attached as-built record survey exhibits (from Lamp Rynearson), the redlined grading exhibits (by Aspen Engineering), the lot grading certification checklist for the building expansion, and the overall site and drainage certification checklist for the LID/raingarden located east of the parking lot. Aspen is providing the following as the assessment of the drainage adjacent to LINAC Building Expansion: 1) Grading along the north side of the building provides for positive conveyance of runoff away from the building with sheet flow conveyed across the concrete sidewalk, over a grass parkway to the adjacent curb and gutter. Flow drains east in the gutter, then south in the drive aisle gutter. 2) Grading along the east side of the building provides for runoff being conveyed east away from the building over concrete sidewalk, then over a grass parkway to the adjacent curb and gutter. Runoff enters the curb and gutter in the drive aisle, flows southeast, across the pavement to the east curb and gutter. Runoff is directed to a concrete chase and flows east through the parking lot and ultimately is intercepted by an existing storm inlet in parking lot. 3) Grading along the north and east sides of the building provides for positive conveyance of drainage away from the building as flow sheet over the sidewalk and grass parkway to the adjacent curb and gutter, per the approved plans. Grades away from the building within the first 5 feet are limited to 2% to maintain ADA compliance for the sidewalk constructed next to the building. 4) Grading along the majority of the north side of the building provides for positive conveyance of drainage north and away from the building, with runoff along the central and eastern half of the north side being intercepted by a drainage swale that conveys runoff east at approximately 1.6% to an area inlet, per the approved plans. 5) The surveyed finish floor (FF) elevation for the building is 4963.29. The proposed finish floor elevations were 4963.27. The difference in elevation is 0.02 as measured in the south entry. 6) Please refer to the attached redlined copy of the as-built survey overlain with the proposed grading spot elevations. Roof drainage is piped underground and connects to the existing storm sewer structure. Aspen is providing the following discussion in response to items on the Overall Site and Drainage Certification checklist responded with a “no” response or items in need of further explanation. Please refer to the checklist for the item number used below. III.A.3. Accurate measurements of inverts at the underdrain cleanouts were not possible because of bends at the fittings. McCarthy, the project contractor, marked up the survey as-built values to account for this. An attachment is included with this letter. V.A.3. The elevation of the overflow grate in the raingarden is 4959.75. The as-built grate elevation is 4959.69, a difference of 0.06 ft. The spillway from the raingarden was set at elevation 4959.95. The top of the pond/spillway is approximately 4960.0 and this elevation will be the top of raingarden and the inlet will serve as spillway for the pond. There is no significant impact on raingarden operation and will provide adequate treatment volume. The raingarden volume is provided as an attachment with this letter. V.A.4. Storm pipes from the raingarden overflow to the downstream storm structure are at different inverts from design. However, the pipe slopes of 1.1% and 4.4% are adequate to convey the flow from the raingarden. Also, even if the storm pipe were to plug the overflow will be conveyed on the surface to the downstream inlet. X.A.3. and XI. A.2. Additional erosion control was added in the raingarden. Approved plans required North American Green S150, 6’ wide by 12’ long. As requested by the City of Fort Collins, a permanent erosion control fabric was installed. The fabric coverage was also increased to include the full length of the slope adjacent to the parking lot drive aisle. 1/19 Page 1 of 2 DURING CONSTRUCTION INSPECTION CHECKLIST To be completed by Construction Superintendent This checklist is to be completed during construction and included with the Overall Site and Drainage Certification.  Use “Yes” for items completed as described.  Use “N/A” for items that are not applicable to the site being certified.  If any blanks are “No,” attach an explanation referencing the item number below. Project Name: UCHealth Harmony LINAC Expansion Date: 06/05/2021 Building Permit Numbers: B2001927, B2000785 I. Compaction A. N/A All berms and embankments meet the compaction requirements as specified in the project geotechnical report or comply with the City’s standard, which is “soils should be compacted within a moisture content range of 2% below to 2% above optimum moisture content and compacted to 95% of the Maximum Standard Proctor Density (ASTM D698).” Compaction requires verification during construction. Provide testing log from contractor/engineer. II. Storm Drain Pipe Installation Requirements A. Yes The pipe trenches have been compacted in accordance with Section 02225-3.07.A.1. of the Fort Collins Development Construction Standards for Water, Wastewater, Stormwater (e.g., the trenches in the roadways are to be 95% of maximum density and all other areas are to be at 90%, both in accordance with ASTM D698). III. Energy Dissipation and Erosion Protection - FCSCM Chapter 9, Section 7.0 A. Riprap 1. N/A The riprap bedding is a granular bedding of the gradation and thickness indicated on the approved construction plans. 2. N/A A filter fabric was installed instead of granular bedding and is the material shown on the approved construction plans or was an approved equal. Provide documentation for an approved equal. 3. N/A The riprap is the gradation shown on the approved construction plans with a D50 of . 4. N/A The riprap thickness is as shown on the approved construction plans and extends to the horizontal limits shown. 5. N/A The riprap is buried to the depth indicated on the approved construction plans. (A minimum of 6 inches of soil is required.) B. Permanent Erosion Control Fabric - FCSCM Vol.1, Ch.7 1. Yes All fabric was installed per manufacturer’s specifications. 1/19 Page 2 of 2 IV. Other Permanent BMPs A. N/A All cut-off walls have been installed in accordance with the approved construction plans. (Cut-off walls are required for irrigation ditch crossings of storm drain pipes.) V. Extended Detention Basins A. N/A Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the water quality control box(es). Provide date of inspection and name of inspector: Included certification sheet(s): Please check the appropriate box(es) for the Low Impact Development (LID) facilities found on this site and complete the corresponding certification sheets. ☐ Permeable Interlocking Concrete Pavers ☒ Bioretention Cells (Rain Gardens) ☐ Sand Filters ☐ Vegetated Buffers ☐ Underground Infiltration ☐ Other LID – For certification of Dry Wells, Tree Filters, Constructed Wetland Channels & Ponds, etc., contact City Staff to determine requirements to exhibit the LID facility has been constructed and functions as intended per the approved drainage report. *Please provide photographic documentation of the installation of all stages of all LID facilities. **Please contact the City Stormwater Inspector at stormwaterinspection@fcgov.com to discuss inspection requirements for each LID facility and request inspections. ***All facilities being certified must be “clean” – free of sediment & construction debris – prior to certification or acceptance of the facility. Completed by: Name: Ethan Walton Title: Project Manager Email: ejwalton@mccarthy.com Phone: 317-691-0844 Company: McCarthy Building Companies, Inc. Address: 2401 15th Street, Suite 350 Denver, CO 80202 1/19 Page 1 of 2 Permeable Interlocking Concrete Pavers Item/Activity Yes No N/A Submittal Requirements Submitted?/Response Stormwater Inspection Pre-construction meeting was held with City-Stormwater Inspector to discuss installation, inspection, checklist, and protection from sedimentation ☐ ☐ ☒ Record date, inspector name, meeting location (i.e. DCP, initial erosion control inspection, etc.) Sub-surface inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the outlet, underdrain, geomembrane layer, and sub-base courses (per design in Final Plan Documents) ☐ ☐ ☒ Record date(s) of inspection and inspector’s name Surface inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the pavers and joint fill material ☐ ☐ ☒ Record date(s) of inspection and inspector’s name Excavation Heavy equipment did not encroach into the excavated area (prevents over-compaction) ☐ ☐ ☒ Bottom of cell was “ripped” after excavation ☐ ☐ ☒ Provide photographs before and after “ripping” Bottom surface of cell is flat and level ☐ ☐ ☒ Provide photograph Impermeable Liner Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered material Impermeable liner is attached to concrete perimeter wall ☐ ☐ ☒ Provide photograph Impermeable liner is buried with no exposure ☐ ☐ ☒ Any penetrations of the impermeable liner have been sealed and checked for water-tightness ☐ ☐ ☒ Provide photograph (if necessary) Edge Restraint and Concrete Cut-Off Wall The required edge restraint meets design specifications ☐ ☐ ☒ Provide specification of installation Concrete cut-off wall meets design specifications for: ☐ ☐ ☒ Provide specification of installation - Dimensions ☐ ☐ ☒ - Reinforcement ☐ ☐ ☒ - Footings ☐ ☐ ☒ Underdrain System Underdrain pipe meets design specifications ☐ ☐ ☒ Provide photograph At least one cleanout is provided per underdrain lateral ☐ ☐ ☒ Provide photograph 1/19 Page 2 of 2 Cleanout pipe is solid (not perforated/slotted) ☐ ☐ ☒ Provide photograph Cleanout covers are installed and watertight ☐ ☐ ☒ Provide photograph Verify the underdrain is NOT wrapped in geotextile fabric ☐ ☐ ☒ Provide photograph Verify there is no orifice plate on the underdrain outfall ☐ ☐ ☒ Provide photograph Underdrain integrity tested after backfilling using TV and/or water test ☐ ☐ ☒ Provide documentation of test results Aggregate Sub-base Course(e.g., #2/4): - Has 90% fractured faces - Is thoroughly washed (virtually free of fine sediment) - Is installed to the required design depth ☐ ☐ ☒ Provide load ticket, photographs, and record depth installed Basecourse (e.g., #57): - Has 90% fractured faces - Is thoroughly washed (virtually free of fine sediment) - Is installed to the required design depth ☐ ☐ ☒ Provide load ticket, photographs, and record depth installed Leveling Course / Joint Fill (e.g., crushed #89): - Has 90% fractured faces - Is thoroughly washed (virtually free of fine sediment) - Is dry screened - Is installed to the required design depth and to the top of the paver joints ☐ ☐ ☒ Provide load ticket, photographs, and record depth installed Aggregate materials are installed and compacted according to manufacturer’s and/or design specifications ☐ ☐ ☒ Provide photographs and documentation of compaction Protection During Construction PICP area is protected from construction site sediment, including runoff from the upstream catchment and construction equipment traffic ☐ ☐ ☒ Specify how the area was covered and/or otherwise protected to prevent construction runoff from entering the pavement Close Out Cracked/broken paver units have been removed and replaced ☐ ☐ ☒ Paver height offsets are no more than 1/4” between adjacent units & surface contains no deformations (depressions/settlement) exceeding 1/2" ☐ ☐ ☒ Upstream catchment is stabilized prior to diverting runoff into PICP system ☐ ☐ ☒ 1/19 Page 1 of 3 Bioretention Cells (Rain Gardens) Item/Activity Yes No N/A Submittal Requirements Submitted?/Response Stormwater Inspection Pre-construction meeting was held with City-Stormwater Inspector to discuss installation, inspection, checklist, and protection from sedimentation ☒ ☐ ☐ Record date, inspector name, meeting location (i.e. DCP, initial erosion control inspection, etc.) DCP meeting was conducted on 4/22/2020. Underdrain and basecourse inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the outlet, underdrain, geomembrane layer, and base course (per design in Final Plan Documents) ☒ ☐ ☐ Record date(s) of inspection and inspector’s name Martha Cruse – 10/28/2020, 11/13/2020 Pea gravel and BSM inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the pea gravel and bioretention sand media ☒ ☐ ☐ Record date(s) of inspection and inspector’s name Martha Cruse – 11/16/2020 Excavation Heavy equipment did not encroach into the excavated area (prevents over-compaction) ☒ ☐ ☐ Bottom of cell was “ripped” after excavation ☒ ☐ ☐ Provide photographs before and after “ripping” See photos #1-#3. Martha Cruse observed and approved bottom surface. Bottom surface of cell is flat and level ☒ ☐ ☐ Provide photograph See photos #4-#5. Martha Cruse observed and approved bottom surface. Excavated area is protected/surrounded by sediment/runoff control measures during construction ☒ ☐ ☐ Provide photograph See photo #6. Intake Upstream catchment drains to inlet/bioretention cell per plan and flows are fully captured ☒ ☐ ☐ Forebay Forebay is installed according to design specifications ☐ ☐ ☒ Provide photograph There is a minimum 3” drop at the forebay entrance ☐ ☐ ☒ Provide photograph Forebay will drain fully and not hold standing water ☐ ☐ ☒ Outlet Structure/Overflow 1/19 Page 2 of 3 Emergency overflow elevation is confirmed ☐ ☐ ☒ Measure and record distance from overflow to top of media filter; provide photograph Overflow inlet elevation is set above bioretention media per plan ☐ ☐ ☒ Provide photograph Overflow inlet invert elevation is at least 3 inches below containment wall/berm (to direct overflow into inlet) ☐ ☐ ☒ Measure and record distance between inlet and top of containment wall/berm; provide photograph Overflow path and check dams, if used, are armored to protect from erosion and maintain elevations ☐ ☐ ☒ Provide photograph Impermeable Liner Impermeable liner meets design specifications ☒ ☐ ☐ Provide specifications of delivered material See attached product data. Impermeable liner is appropriately anchored ☒ ☐ ☐ Provide photograph See photos #14 & #23. Impermeable liner is buried with no exposure ☒ ☐ ☐ See photos #30 - #34. Any penetrations of the impermeable liner have been sealed and checked for water-tightness ☐ ☐ ☒ Provide photograph (if necessary) Underdrain System Underdrain pipe meets design specifications ☒ ☐ ☐ Provide photograph See photos #7 - #8. At least one cleanout is provided per underdrain lateral ☒ ☐ ☐ Provide photograph See photos #12 - #14. Cleanout pipe is solid (not perforated/slotted) ☒ ☐ ☐ Provide photograph See photos #9 & #12. Cleanout covers are installed and watertight ☒ ☐ ☐ Provide photograph See photo #9. Verify the underdrain is NOT wrapped in geotextile fabric ☒ ☐ ☐ Provide photograph See photo #12. Verify there is no orifice plate on the underdrain outfall ☒ ☐ ☐ Provide photograph See photo #11. Underdrain integrity tested after backfilling using TV and/or water test ☒ ☐ ☐ Provide documentation of test results See photos #10 - #11. Filter Media and Aggregate Reservoir aggregate layer (ASTM #57 or #67): - meets design specifications - is installed to the required design depth ☒ ☐ ☐ Provide load ticket, photographs, and record depth installed Martha Cruse observed installation and material depths. See photos #13 - #16. Diaphragm aggregate layer (“Pea Gravel” with gradation ASTM #8, #89, or #9): - meets design specifications - is installed to the required design depth ☒ ☐ ☐ Provide load ticket, photographs, and record depth installed Martha Cruse observed installation and material depths. See photos #17 - #20. 1/19 Page 3 of 3 Bioretention Sand Media (BSM) composition: - meets design specifications - is installed to the required design depth ☒ ☐ ☐ Provide load ticket, photographs, and record depth installed Martha Cruse observed installation and material depths. See photos #21 - #24. BSM was “machine mixed” by supplier prior to delivery ☒ ☐ ☐ Provide load ticket Reference material sample delivered to Aspen Engineering on 08/27/2021. BSM is installed flat and level ☒ ☐ ☐ Provide photograph See photos #25 - #26. Other Structural Components Containment wall/berm is continuous and level ☐ ☐ ☒ Landscaping Verify final landscaping is free of sod ☒ ☐ ☐ If sod is used, it must be shown to be “sand-grown” See photos #27 - #34. Final landscaping (non-floatable mulch) is flat and level ☐ ☐ ☒ Provide photograph See photos #30 - #34. Vegetation is planted according to landscape design specifications and final landscaping plan ☒ ☐ ☐ Provide photograph See photos #27 - #34. Verify that weed barrier is NOT installed ☒ ☐ ☐ See photos #25 - #29. Temporary irrigation installed ☒ ☐ ☐ If N/A, then verify that permanent irrigation is installed to establish/maintain vegetation Close Out Upstream catchment stabilized prior to diverting runoff into bioretention cell ☒ ☐ ☐ 1/19 Page 1 of 1 Vegetated Buffers Item/Activity Yes No N/A Submittal Requirements Submitted?/Response Construction Buffer area was sectioned off to eliminate site disturbance and compaction during construction ☐ ☐ ☒ Provide photograph(s) Level spreader has been installed per plan (if applicable) ☐ ☐ ☒ Provide photograph Soils in the buffer area have been amended ☐ ☐ ☒ Record soil amendment certification with Environmental & Regulatory Affairs Vegetation is planted according to landscape design specifications and final landscaping plan ☐ ☐ ☒ Provide photograph 1/19 Page 1 of 3 Sand Filters Item/Activity Yes No N/A Submittal Requirements Submitted?/Response Stormwater Inspection Pre-construction meeting was held with City-Stormwater Inspector to discuss installation, inspection, checklist, and protection from sedimentation ☐ ☐ ☒ Record date, inspector name, meeting location (i.e. DCP, initial erosion control inspection, etc.) Underdrain and basecourse inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the outlet, underdrain, geomembrane layer, and base course (per design in Final Plan Documents) ☐ ☐ ☒ Record date(s) of inspection and inspector’s name Pea gravel and filter media inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the pea gravel and filter media ☐ ☐ ☒ Record date(s) of inspection and inspector’s name Excavation Heavy equipment did not encroach into the excavated area (prevents over-compaction) ☐ ☐ ☒ Bottom of cell was “ripped” after excavation ☐ ☐ ☒ Provide photographs before and after “ripping” Bottom surface of cell is flat and level ☐ ☐ ☒ Provide photograph Excavated area is protected/surrounded by sediment/runoff control measures during construction ☐ ☐ ☒ Provide photograph Intake Upstream catchment drains to inlet/sand filter per plan and flows are fully captured ☐ ☐ ☒ Forebay (If Applicable) Forebay is installed according to design specifications ☐ ☐ ☒ Provide photograph There is a minimum 3” drop at the forebay entrance ☐ ☐ ☒ Provide photograph Forebay will drain fully and not hold standing water ☐ ☐ ☒ Outlet Structure/Overflow Overflow inlet elevation is set above sand filter media per plan (typically 1 to 3 feet) ☐ ☐ ☒ Provide photograph Overflow inlet invert elevation is at least 3 inches below containment wall/berm (to direct overflow into inlet) ☐ ☐ ☒ Measure and record distance between inlet and top of containment wall/berm; provide photograph 1/19 Page 2 of 3 Overflow path and check dams, if used, are armored to protect from erosion and maintain elevations ☐ ☐ ☒ Provide photograph Impermeable Liner (If Applicable) Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered material Impermeable liner is appropriately anchored to the perimeter wall ☐ ☐ ☒ Provide photograph Impermeable liner is buried with no exposure ☐ ☐ ☒ Any penetrations of the impermeable liner have been sealed and checked for water-tightness ☐ ☐ ☒ Provide photograph (if necessary) Underdrain System Underdrain pipe meets design specifications ☐ ☐ ☒ Provide photograph At least one cleanout is provided per underdrain lateral ☐ ☐ ☒ Provide photograph Cleanout pipe is solid (not perforated/slotted) ☐ ☐ ☒ Provide photograph Cleanout covers are installed and watertight ☐ ☐ ☒ Provide photograph Verify the underdrain is NOT wrapped in geotextile fabric ☐ ☐ ☒ Provide photograph Verify there is no orifice plate on the underdrain outfall ☐ ☐ ☒ Provide photograph Underdrain integrity tested after backfilling using TV and/or water test ☐ ☐ ☒ Provide documentation of test results Filter Media Filter media composition (e.g. ASTM C 33 Sand): - meets design specifications - is installed to the required design depth ☐ ☐ ☒ Provide load ticket, photographs, and record depth installed Pea gravel layer: - meets design specifications - is installed to the required design depth ☐ ☐ ☒ Provide load ticket, photographs, and record depth installed Filter Media is installed flat and level ☐ ☐ ☒ Other Structural Components Containment wall/berm is continuous and level ☐ ☐ ☒ Landscaping Verify final landscaping is free of sod ☐ ☐ ☒ If sod is used, it must be shown to be “sand-grown” Final landscaping (non-floatable mulch) is flat and level ☐ ☐ ☒ Provide photograph Vegetation is planted according to landscape design specifications and final landscaping plan ☐ ☐ ☒ Provide photograph Verify that weed barrier is NOT installed ☐ ☐ ☒ 1/19 Page 3 of 3 Temporary irrigation installed ☐ ☐ ☒ If N/A, then verify that permanent irrigation is installed to establish/maintain vegetation Close Out Upstream catchment stabilized prior to diverting runoff into sand filter cell ☐ ☐ ☒ 1/19 Page 1 of 2 Underground Infiltration Item/Activity Yes No N/A Submittal Requirements Submitted?/Response Stormwater Inspection Manufacturer’s representative pre-construction meeting: A pre-construction meeting was completed with the manufacturer’s representative and installers ☐ ☐ ☒ Record date and who was present at the meeting Pre-construction meeting was held with City-Stormwater Inspector to discuss installation, inspection, checklist, and protection from sedimentation ☐ ☐ ☒ Record date, inspector name, meeting location (i.e. DCP, initial erosion control inspection, etc.) Inspection(s): Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point at which the chambers had been laid/prior to backfilling. Correct fabric placement was confirmed. ☐ ☐ ☒ Record date(s) of inspection and inspector’s name Excavation Heavy equipment did not travel across underground cell area during excavation (prevents over-compaction) ☐ ☐ ☒ Bottom of cell was “ripped” after excavation ☐ ☐ ☒ Provide photographs before and after “ripping” Bottom of cell is flat and level, or graded per approved grading plans ☐ ☐ ☒ Provide photograph Non-woven fabric is installed per manufacturer’s specifications and was not damaged during construction (around system) ☐ ☐ ☒ Provide photograph Woven fabric is installed per manufacturer’s specifications and was not damaged during construction (beneath chambers) ☐ ☐ ☒ Provide photograph Excavated area is protected/surrounded by sediment/runoff control BMPs during construction ☐ ☐ ☒ Provide photograph Impermeable Liner Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered material Impermeable liner is not exposed ☐ ☐ ☒ Any penetrations of the impermeable liner have been sealed and checked for water-tightness. ☐ ☐ ☒ Provide photograph (if necessary) Aggregate Foundation and embedment materials are installed and compacted according to design and manufacturer’s specifications ☐ ☐ ☒ Provide load ticket and photograph(s) Underdrain System 1/19 Page 2 of 2 Underdrain pipe meets design specifications ☐ ☐ ☒ Provide photograph At least one cleanout is provided per underdrain lateral ☐ ☐ ☒ Provide photograph Cleanout pipe is solid (not perforated/slotted) ☐ ☐ ☒ Provide photograph Cleanout covers are installed and watertight ☐ ☐ ☒ Provide photograph Verify the underdrain is NOT wrapped in geotextile fabric ☐ ☐ ☒ Provide photograph Verify there is no orifice plate on the underdrain outfall ☐ ☐ ☒ Provide photograph Underdrain integrity tested after backfilling using TV and/or water test ☐ ☐ ☒ Provide documentation of test results Manifold system Overflow weir elevation is set at/above water quality storm elevation ☐ ☐ ☒ Record weir elevation on survey Maintenance access is provided for each Isolator Row ☐ ☐ ☒ At least one inspection port has been provided for each Isolator Row (located in middle third of each row) ☐ ☐ ☒ Upstream catchment drains to inlet/intake properly ☐ ☐ ☒ Underground Detention Chambers All chambers were installed per approved Utility Plans and manufacturer’s specifications ☐ ☐ ☒ Photograph Close Out Upstream catchment is stabilized prior to diverting runoff into Underground Detention system ☐ ☐ ☒ All Isolator Rows, chambers, and pipes are cleaned and sediment/debris has been removed ☐ ☐ ☒ Roger Hageman/Hageman Earth Cycle Colorado State University 3501 E Prospect Soil, Water and Plant Testing Laboratory Fort Collins CO 80525 Natural & Environmental Sciences Bldg - A320 Fort Collins, CO 80523-1120 DATE RECEIVED: 07-18-2018 (970) 491-5061 FAX: 491-2930 DATE REPORTED: 07-20-2018 BILLING: B S M Analysis RESEARCH SOIL ANALYSIS ---------paste--------------Organic ----------Extractable--------------[---% Retained by Sieve Size-----] Lab Sample pH EC Matter NO3-N P K >2mm 1mm 0.5mm 0.25mm0.106mm P # ID #mmhos/cm % ----------------ppm------------------ index R235 BSM-HEC 7.4 1.9 1.2 9.1 26.0 203 12.01 15.93 25.84 19.89 8.75 0.15 5% Ground Cedar, 65% Sand, 5% Compost, 25% Soil, City Spec R236 BSM-HEC-CSU 8.3 2.1 0.4 0.3 2.7 19.4 13.60 22.70 23.04 15.11 9.99 0.11 80% Sand, 10% Silt, 10% Clay This spec came to us from CSU by way of DunRite EX DATE REPORTED: 07-26-2018 ---------paste--------------Organic ----------Extractable----------------------% Retained by Sieve Size------ Lab Sample pH EC Matter NO3-N P K >2mm 1mm 0.5mm 0.25mm 0.106mm P Index # ID #mmhos/cm % ----------------ppm------------- R263 HEC-BSM 65-30-5 7.4 1.6 1.1 23.5 18.9 146 12.9 21.68 23.51 14.21 7.95 0.12 City Specs 5.5 - 6.5 10.4 > < 69 Percentages = Ground Cedar 5%, Sand 65%, Compost 5%, & soil 25% = City Specs Page 1 of 1 In Yard Stock Date Needed = / /25 < < Cubic Yards of Mix Needed Semi Loads Needed Tot CY Mixing Portions for Loader Operator 1 CY 3 CY 4.5 CY 8 # of 8 CY Buckets CY Per Sand = 25 CY / load Needed Products Mixed 1 CY T # of CY Bucket Bucket Bucket CY Bucket Per 12' Section Section Compost 40 CY / Load To Mix Ground Cedar 5%1.25 1.25 0.4 0.3 0 0.13 1.00 In Stock 1 Sand 65%16.25 16.25 5.4 3.6 2 1.6 13.00 In Ctock 16 Compost 5%1.25 1.25 0.4 0.3 0 0.1 1.00 In Stock 1 Soil 25%6.25 6.25 2.1 1.4 1 0.6 5.00 In Stock 6 Totals 100%25.00 25.00 8.33 5.56 3 2.5 20.00 25 The formula above is for one section of the windrow. C Y / SECTION % In Each Cubic Yards Bucket CY Bucket CY Bucket CY Length of the windrow = 18 feet. 20 Cubic Yard Per Section 8 5.5 4.00 Each 12' section will have 20 cubic yards. Cedar 5%1.0 0.13 0.18 0.25 ? 8/1/2021 = Date Printed Sand 65%13.0 1.63 2.36 3.25 Compost 5%1.0 0.13 0.18 0.25 Use ONLY an APPROPRIATE SIZE BUCKET when mixing. Top Soil 25% 5.0 0.63 0.91 1.25 Do not use an 8 CY bucket to measure 3 or 4 CY. Totals 100%20.0 2.50 3.64 5.00 MIXING GUIDEHageman Earth Cycle Mixing Guide PHOTO #1 PHOTO #2 PHOTO #3 PHOTO #4 PHOTO #5 PHOTO #6 PHOTO #7 PHOTO #8 PHOTO #9 PHOTO #10 PHOTO #11 PHOTO #12 PHOTO #13 PHOTO #14 PHOTO #15 PHOTO #16 PHOTO #17 PHOTO #18 PHOTO #19 PHOTO #20 PHOTO #21 PHOTO #22 PHOTO #23 PHOTO #24 PHOTO #25 PHOTO #26 PHOTO #27 PHOTO #28 PHOTO #29 PHOTO #30 PHOTO #31 PHOTO #32 PHOTO #33 PHOTO #34 4715 INNOVATION DR., STE. 100 FORT COLLINS, CO 80525 970.226.0342 LampRynearson.com Know what's below. before you dig.Call R COLORADO L ICENSED P R O F E S SI O N A L L A N D S U R V E Y O R38621MICHAEL GERARD STRATTON UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE D 12'' W 12'' W 12'' W 12'' W 12'' W 12'' W 12'' W 12'' W 12''W 12''W 12''W 12'' W 12'' W 12'' W 12'' W 12'' W 12'' W 4715 INNOVATION DR., STE. 100 FORT COLLINS, CO 80525 970.226.0342 LampRynearson.com Know what's below. before you dig.Call R