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HomeMy WebLinkAboutFile Documents.1050 Matchless Dr.0113-2020-BRES (36) P.O. Box 3901 YARNELL CONSULTING & 229 Midland Ave. Eagle, Colorado 81631 Basalt,Colorado 81621 CIVIL DESIGN, LLC (970) 323-7008. 8/23/2022 Racquet Club Condominium Associates c/o Frias Properties 730 East Durant Avenue Aspen,Colorado 81611 Subject: 1040 &1050 Matchless Drive Private Storm Sewer Infrastructure Operations &Maintenance To Whom It May Concern: As part of the improvements completed on your property in 2022,a new storm sewer system has been installed to capture,treat,and infiltrate runoff into the well-draining soils beneath your parking lot. Proper operations and maintenance of the system is critical to its long-term performance. Sediment will clog the system;therefore, must be kept out. In my opinion,the greatest source of sediment on this property is likely to be traction sand spread during the winter months.An effort should be made to minimize sanding operations.When it comes time to clean traction sand from the site,it should be swept up and placed in a trash receptacle instead of down into the drains. Most sediment that does reach the drains will be captured by Flexstorm Inlet Filters bags placed in each one.These bags should be inspected and maintained in accordance with the manufacturer's published documentation which is included as Attachment 1. Sediment that escapes from the Flexstorm bags could collect in the drain basins where there is a sump between the bottom of the structure and the outgoing pipe.This area in each basin can be visually inspected by removing the grate and Flexstorm bag.Any sediment observed here should be vacuumed out. Finally,sediment that continues down the storm system will collect in the StormTech below-grade detention and infiltration chamber system.The chamber should be inspected and maintained in accordance with the manufacturer's published documentation which is included as Attachment 2. This system can be accessed via drain basins placed on either side.There should be no water in the system 72 hours after the end of a precipitation event. If water is observed in the basins,it means the system is not infiltrating sufficiently.A vacuum truck should be employed to remove the sediment from the floor of the chambers. Sincerely, Justin J.Yarnell,PE Colorado PE Number 47241 1040 & 1050 Matchless Drive Page 1 of 2 P.O. Box 3901 YARNELL CONSULTING & 229 Midland Ave. Eagle, Colorado 81631 Basalt,Colorado 81621 CIVIL DESIGN, LLC (970) 323-7008• 8/23/2022 Attachments: 1. Flexstorm Inlet Filters O&M Guide by ADS 2. Isolator Row O&M Manual by ADS StormTech 1040 & 1050 Matchless Drive Page 2 of 2 /// DSry Advanced Drainage Systems, Flexstorm Inlet Filters 24137 W. 111th St. Unit A Naperville, IL 60564 ADS Flexstorm Inlet Filters Operation and Maintenance Guide Installation Instructions: ``` 1. Remove grate from the inlet. 2. Clean debris from the ledges of the inlet. 3. Place the inlet filter onto the load bearing ledges of the 'structure. 4. Replace the grate and confirm it's not elevated more than 1/8„ ( Inlet ID: Frequency of Inspections: 1. Inspection should occur following rain events >1/2". 2. Temporary use filters should be monitored accordingly to \� current site runoff conditions. 3. Permanent use filter inspections to occur a minimum of 3 Date Task Performed Initials times per year and in snowfall affected regions, inspections prior to and after snowfall season. /- 4. Industrial application site inspections (loading ramps, wash —/—/— racks & maintenance facilities) to be scheduled on a recurring —/—/— basis no less than 4 times per year or as needed. /— Maintenance Guidelines: /- 1. Empty the filter bag manually or by industrial vacuum /— taking care not to damage the geotextile bag when more /— than half filled or during scheduled inspection period. /- 2. Remove compacted silt from sediment bag and flush with /— medium spray. 3. Permanent filter "PCP" style bags should be pressed or /— wrung to recover retained oils. /- 4. Cleartec oil skimmer pouches solidify and darken when /— saturated, indicating time for replacement. /- 5. Dispose of all oil contaminated products and recovered oils in accordance with EPA guidelines. Cleartec pouches, since a solidifier, will not leach and can be disposed of directly. /-- 6. Inspect and replace bag if torn or punctured. /— Sediment Bag Replacement: -/-/- 1. Remove the bag by loosening or cutting off clamping band. /- 2. Take the new correctly sized sediment bag and secure —/—/— hose clamping band to the frame channel as previously /— removed. /- 3. Ensure Bag is secure and there is no slack around /— perimeter. Our reason is water." Advanced Drainage Systems,Inc.//'4640 Trueman Boulevard,Hilliard,OH 43026//Tel 6'4,66e 0050 ///adspipe.com Isolator® Row O& M Manua . ._... ,... , _ si • i.,,, - ' li 40°F -- 4, 1 4_,1 4 al ,, •'"....r ,..,3, . ...._ /1- _, .• ''''tot ; -- --/'' L t.'--,; w , 'r. . • 1.1- ..- . .,- ,4;6 . ,,.• { . a• • +1, ir 4.01.1, 7 iirftr -"' .07711. , " 1 -r- - -, ./.-- rt •fr---- ft .?-,,,,t f:" ,t14 • sow-.$.pow (.. , it;/- ,- 1.101‘ :- (-- -4,i r " -...":401,Cs•p .. . ill I .,• , 4 , il... „..... ....., 44/1'It 40... • z.,- - ... r: g .i.,, ..;. ' .. .,.., ty M-- ' 4, -• V. i ' 0 lh, . . . NrOir ) i 411 .... '' ,<101. . f , I . ... .41111110e - , _ . 0 -,..-1_60 ... ...1.I,•-•0,, -r• yr C:r; _77. 0 -...- . „.. oleo ... • trk;-•;" -,...%,et- It.,‘ - ..,•• •4 ,..). ..- t '''.. ''''''' 1 1. !if , *11"%-i,- -' • ,:# eill4 ,411, ' , ,,•,--a ; .,,,..' , at 11,4 ', --,-.. A),• ,' 170,001.1 64 , - ,"4r•°-, aeg • - ' - ,ii, WADS StormTech The Isolator° Row Introduction 1111141111 An important component of any Stormwater Pollution Prevention Plan is inspection and maintenance.The StormTech Isolator Row is a j technique to inexpensively enhance Total Suspended Solids (TSS) and Total Phosphorus (TP) removal with easy access for inspection and maintenance. The Isolator Row The Isolator Row is a row of StormTech chambers, either SC-160, SC- 310, SC-310-3, SC-740, DC-780, MC-3500 or MC-7200 models,that is surrounded with filter fabric and connected to a closely located manhole for easy access.The fabric-wrapped chambers provide for sediment settling and filtration as stormwater rises in the Isolator Looking down the Isolator Row Row and passes through the filter fabric.The open bottom chambers from the manhole opening,woven and perforated sidewalls (SC-310, SC- 310-3 and SC-740 models) allow geotextile Fabric is shown between the chamber and stone base. stormwater to flow both vertically and horizontally out of the chambers. Sediments are captured in the Isolator Row protecting the adjacent stone and chambers storage areas from sediment accumulation. - - a _._.... ice. .-- ADS geotextile fabric is placed between the stone and the Isolator Row chambers.The woven geotextile provides a media for Stormwater , filtration, a durable surface for maintenance, prevents scour of the + r underlying stone and remains intact during high pressure jetting.A Jr non-woven fabric is placed over the chambers to provide a filter media for flows passing through the chamber's sidewall. The non-woven fabric is not required over the SC-160, DC-780, MC-3500 or MC-7200 models as these chambers do not have perforated side walls. The Isolator Row is designed to capture the "first flush" runoff and • r 7$;.: •,,. ,n offers the versatility to be sized on a volume basis or a flow-rate basis. An upstream manhole provides access to the Isolator Row and includes a high/low concept such that stormwater flow rates or volumes that exceed the capacity of the Isolator Row bypass through a manifold to StormTech Isolator Row with the other chambers. This is achieved with an elevated bypass manifold Overflow Spillway(not to scale) or a high-flow weir. This creates a differential between the Isolator Row row of chambers and the manifold to the rest of the system, thus OPTIONAL allowing for settlement time in the Isolator Row. After Stormwater PRETREATMENT flows through the Isolator Row and into the rest of the chamber system STORMTECH it is either exfiltrated into the soils below or passed at a controlled rate ISOLATORROW through an outlet manifold and outlet control structure. E The Isolator Row may be part of a treatment train system. The MAN HOL WITH treatment train design and pretreatment device selection by the OVERE�OW ;--E WEIR design engineer is often driven by regulatory requirements. Whether - 41.M. pretreatment is used or not, StormTech recommend using the Isolator = =MR- ) Row to minimize maintenance requirements and maintenance costs. ECCENTRIC �--�r ) HEADER Note:See the StormTech Design Manual for detailed information on = =Mac ) designing inlets for a StormTech system, including the Isolator Row. MIME- ) =Mt- ) OPTIONAL ACCESS STORMTECH CHAMBERS Isolator Row Inspection/Maintenance Inspection via a manhole(s) located on the end(s) of the row The frequency of inspection and maintenance varies for cleanout. If entry into the manhole is required, by location.A routine inspection schedule needs to please follow local and OSHA rules for a confined be established for each individual location based space entries. upon site specific variables. The type of land use Maintenance is accomplished with the JetVac (i.e. industrial, commercial, residential), anticipated process.The JetVac process utilizes a high pressure pollutant load, percent imperviousness, climate, water nozzle to propel itself down the Isolator etc. all play a critical role in determining the actual Row while scouring and suspending sediments. frequency of inspection and maintenance As the nozzle is retrieved,the captured pollutants practices. are flushed back into the manhole for vacuuming. At a minimum, StormTech recommends annual Most sewer and pipe maintenance companies have inspections. Initially,the Isolator Row should be vacuum/JetVac combination vehicles. Selection of an inspected every 6 months for the first year of appropriate JetVac nozzle will improve maintenance operation. For subsequent years,the inspection efficiency. Fixed nozzles designed for culverts or should be adjusted based upon previous large diameter pipe cleaning are preferable. Rear observation of sediment deposition. facing jets with an effective spread of at least 45" The Isolator Row incorporates a combination of are best.JetVac reels can vary in length. For ease of maintenance,ADS recommends Isolator Row standard manhole(s) and strategically located lengths up to 200" (61 m). The JetVac process shall inspection ports (as needed). The inspection ports only be performed on StormTech Isolator Rows allow for easy access to the system from the surface, that have AASHTO class 1 woven geotextile (as eliminating the need to perform a confined space specified by StormTech) over their angular base entry for inspection purposes. stone. If upon visual inspection it is found that sediment has accumulated, a stadia rod should be inserted to �-- determine the depth of sediment.When the average .......34.._ \ depth of sediment exceeds 3 inches throughout Ir the length of the Isolator Row, clean-out should be performed. r, 100 000111114 Maintenance 1 The Isolator Row was designed to reduce the cost of periodic maintenance. By"isolating" sediments to just one row, costs are dramatically reduced O by eliminating the need to clean out each row of .00ti, the entire storage bed. If inspection indicates the . - potential need for maintenance, access is provided StormTech Isolator Row(not to scale) Note: Non-woven fabric is only required over the inlet pipe connection into the end cap for SC-160LP, DC-780, MC- 3500 and MC 7200 chamber models and is not required over the entire Isolator Row. OPTIONAL INSPECTION PORT SC-740,SC-310;COVER ENTIRE ISOLATOR ROW WITH ADS // /�/ /�/ GEOSYNTHETICS SUIT NON WOVEN GEOTEXTILE `y yy� ,fi „w � �.lF SC7508(24 m)MIN WIDE 6j1951�T�� �i�YsY, SC HIT 5(1.5 m)TIN WIDE gg� g� pp y y1xr y y`y' S Jb'�".6t5'a"R" s of 8 f`�Y'm„Z � +��x�� �,�€ " y day+sa °y''y 4y fX N tP <-K MC 4500 MC ON DC IO SC END CAP COVER PIPE I 6-8 .` "'R* lva` <y YA' � 9 Y v 5�$cm$ e 6TORMTEGH CHAMBER CONNECTION TO END WITH ADS I �;¢ „,„y` P W.F' f CF_� -8`gnlg vog"e� te:4C ''-a GEOSYNTHETICS 601T NON WOVENGEOTEXTILE FA aVW8 *8r, ',r Ly an^5" p 2 {y / STORMTECH END CAP 1 �.�¢¢�ul0 dr SIP�I II® iIR®wl iyyi ILJ CATCH BASIN I�n 1! ill i I'I,I I I Ili N °II M I® °N t.4 r�ll_I 9111 MANHOLE 111 ° 1( II(II II II ( 111 11 1 I- f I— [ III��'� � I� lil'°�,I'II''°�'I����'IIIuhfkill� �II� yl b SUMP DEPTHTBD BY & �� -,� SITE DESIGN ENGINEER Or[600 mm[MIN RECOMMENDED) `TWO LAYERS OF ADS GEOSYNTHETICS 315W5 WOVEN GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS,CONTINUOUS FABRIC WITHOUT SEAMS 24"(600 mm)HDPE ACCESS PIPE REQUIRED:MC-7200,MC-3500,SC-740,DC-780 10.3(3.1 m)MIN WIDE.MC-7200 12"(300 mm)HOPE ACCESS PIPE REQUIRED:SC-310 825'(2.5 m)MIN WIDE'.MC-3500 8"(200 mm)HOPE ACCESS PIPE REQUIRED'.SC-160LP 5'(1.5 m)MIN WIDE.DC-780,SC-]40 4'(1 2 m)MIN WIDE:SC-310,SC-160LP 3 Isolator Row Step By Step Maintenance Procedures Step 1 Inspect Isolator Row for sediment. A) Inspection ports (if present) i. Remove lid from floor box frame ii. Remove cap from inspection riser iii. Using a flashlight and stadia rod,measure depth of sediment and record results on maintenance log. iv. If sediment is at or above 3 inch depth, proceed to Step 2. If not, proceed to Step 3. B)All Isolator Row i. Remove cover from manhole at upstream end of Isolator Row ii. Using a flashlight, inspect down Isolator Row through outlet pipe 1. Mirrors on poles or cameras may be used to avoid a confined space entry 2. Follow OSHA regulations for confined space entry if entering manhole iii. If sediment is at or above the lower row of sidewall holes (approximately 3 inches), proceed to Step 2. If not, proceed to Step 3. Step 2 Clean out Isolator Row using the JetVac process. A)A fixed floor cleaning nozzle with rear facing nozzle spread of 45 inches or more is preferable B)Apply multiple passes of JetVac until backflush water is clean C)Vacuum manhole sump as required Step 3 Replace all caps, lids and covers, record observations and actions. Step 4 Inspect&clean catch basins and manholes upstream of the StormTech system. 1)B) 2 1)A) l'W'rrnriirrrrrrrrrr, 114111111111111V;111;:1111111141111 A:Vi Li.1,____ Sample 4Maintenance Log Stadia Rod Readinss Sedi- Fixed point Fixed point ment to chamber to top of Depth Observations/Actions Inspector bottom(1) sediment 2 (1)-(2) 3/15/11 6.3 f E KONe New iktsEaiLoJ ioN. Fixed DAM poiNE Ls CI frame aE grade 9/24/11 6,2 0.1 fE Bone 9riE f eLE SM 6/20/13 5.If 0.5 f E Mucky feel, debris visible NJ iN nnaNkoLe aNd irk IsoLaEor Row, nnalNEeNaNce due adspipe.com 7/7/13 6.3 f E 0 SysEenn jeEEed nand 'DJM 800-821-6710 vacuurvled ADS"Terms and Conditions of Sale"are available on the ADS website,www.ads-pipe.com /ADS The ADS logo and the Green Stripe are registered trademarks of Advanced Drainage Systems,Inc. Stormtech®and the Isolator®Row are registered trademarks of StormTech,Inc. ^\ ©2022 Advanced Drainage Systems,Inc.#11011 2/22 CS StormTech \1�