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HomeMy WebLinkAboutStormwater OperationAERICAN SMTRUCTUREPOINT INC. Stormwater Operation and Maintenance Manual for CVS PHARMACY Rangeline Road and Medical Drive Carmel, Hamilton County, Indiana Prepared For G.B. Indiana 2, LLC 600 East 96 Street, Suite 150 Indianapolis, Indiana 46240 Prepared By American Structurepoint, Inc. 7260 Shadeland Station Indianapolis, Indiana 46256 October 14, 2009 Al 12 p49 RECEIVED OCT 1 6 699 DOGS 6 63 AMERICAN STRUCTUREPOINT, INC. PROJECT NARRAIVE I. Operations and Maintenance APPENDICES TABLE OF CONTENTS Appendix A BMP Specifications Appendix B Operation, Maintenance, and Inspection Appendix C Site Diagram Appendix D Aqua -Swirl Detail 1N20060188 O AMERICAN STRUCTUREPOINT, INC. STORMWATER OPERATION AND MAINTENANCE MANUAL for CVS PHARMACY L OPERATIONS AND MAINTENANCE Rangeline Road and Medical Drive Carmel, Hamilton County, Indiana FLOW THROUGH BMP (AQUASWIRL STRUCTURE) A mechanical BMP, an Aqua -Swirl AS -6, shall be used for the CVS Pharmacy and adjoining outlot. The Aqua -Swirl structure will be implemented after the on -site underground detention system in the northeast corner of the site. This Aqua -Swirl structure utilizes a vortex flow allowing for the removal suspended solids and attached pollutants. INSPECTIONS and CHECKLISTS Included within this manual is a manufacturer provided manual with inspection and maintenance guidelines. There are also inspection forms that need to be completed for the structure and forwarded to the City of Carmel. It is recommended inspection and maintenance be performed as required by the manufacturer. The City of Carmel will require yearly inspection reports of the water quality BMPs. The owner must allow the Town onto the site for inspections and maintenance, when required. The first will be due one year after the Notice of Termination is submitted. OWNER RESPONSIBILTY The BMP Owner is responsible for all costs associated with maintaining the BMP as described within the stormwater management ordinance or located within the latest version of the Department of Engineering and Public Works fee schedule or fee ordinances. The City of Carmel shall have the right to enter the site in order to inspect and maintain the BMP if the need should arise. The BMP Owner shall be responsible for all fees outlined in the Stormwater Management Ordinance. It is the Owner's responsibility to perform and/or pay for inspections and maintenance as recommended above and as noted in the Aqua -Swirl Manufacturer's manual. All costs associated with maintaining the Aqua -Swirl are the responsibility of the owner. OWNER/OPERATOR (FUTURE OWNER) CVS Pharmacy, One CVS Drive, Woonsocket, Rhode Island, 02895, (401) 765 -1500. DEVELOPER/OWNER'S AGENT Craig Forgey, Regional Construction Manager, Gershman Brown Crowley, 600 East 96 Street, Suite 150, Indianapolis, Indiana, 46240, (317) 819 -0116. 1N20060188 AMERICAN STRUCTUREPOINT, INC. OWNER ACKNOWLEDGEMENT The owner acknowledges responsibility for the operation and maintenance of the site BMPs and also acknowledges the BMP responsibilities will be passed along to future owners and those future owners will be made aware of the Operation and Maintenance Manual and the responsibilities within. Signature Date Printed 1N20060188 AMERICAN STRUCTUREPOINT, INC. APPENDIX A BMP SPECIFICATIONS 1N20060188 AQUA- SWIRL SPECIFICATION NOTES 1. Manufacturer shall be responsible for complete assembly of Swirl Concentrator. 2. Swirl Concentrator shall be fabricated from high- density polyethylene (HDPE) ASTM F 714 cell class 345464C per ASTM D 3350. The Swirl Concentrator wall (greater than 54" OD) shall be fabricated from profile wall HDPE ASTM F 894 RSC 250. 3. HDPE stub outs and internal components shall be extrusion welded using accepted welding practices. Stub outs shall be supplied by Manufacturer and welded on inside and outside. 4. If lifting eyes disturb grade elevation (rim) or concrete pad rebar alignment, they may be cut in field after installation of Swirl Concentrator by Contractor. 5. Manufacturer shall supply direct access to Swirl Concentrator via 32 -inch OD riser(s), which can be field cut to match finished grade by Contractor. 6. Contractor shall supply pipe couplings to and from Swirl Concentrator, which shall be Fernco or Mission style neoprene boot with stainless steel tension bands and shear guard. For corrugated plastic pipe, or pipe with a diameter of 24" or larger, it is recommended that Contractor use a Mar Mac coupling (www.marmac.com), or equal, with adhesive mastic and tightening bands to create a watertight seal around the joint. The joint shall then be immobilized with a concrete collar with compacted base as described in either Note 11 or 12 herein. Mar Mac, or equal, couplings shall overlap the pipe joint a minimum of 1 foot on either side. 7. Contractor shall prepare excavation and off -load Swirl Concentrator. Contractor is responsible for bedding and backfill around Swirl Concentrator as detailed on site plan. (see notes 11 and 12) 8. Manufacturer shall supply standard manhole frame(s) and cover(s). (Traffic rated H20) 9. Where traffic loading (H -20) is required or anticipated, a reinforced concrete pad must be placed over the Swirl Concentrator per concrete design as calculated by Engineer. For systems where the depth from grade to the roof of the chamber is greater than the radius of the chamber, only a 5' X 5' re- enforced concrete pad is necessary. For shallower burials, a pad extending over the entire chamber is required. Sample of typical concrete design detail is available upon request. 10. Unless other traffic barriers are present, bollards shall be placed around access risers in non traffic areas to prevent inadvertent loading by maintenance vehicles. Sample of typical bollard installation detail and recommended locations of bollards around the Swirl Concentrator can be provided upon request. 11. Excavation and Bedding The trench and trench bottom shall be constructed in accordance with ASTM D -2321, Section 6, Trench Excavation, and Section 7, Installation. The HDPE Swirl Concentrator shall be installed on a stable base consisting of 12- inches of Class I stone materials as defined by ASTM D2321, Section 5, Materials, and compacted to 95% proctor density. All required safety precautions for Swirl Concentrator installation are the responsibility of the Contractor. 12. Backfill Requirements Backfill materials shall be Class I Stone or Class II materials (well graded gravels, gravelly sands; contains little or no fines), as defined by ASTM D2321, Section 5, Materials, and compacted to 90% proctor density. Class I stone is preferred. Backfill and bedding materials shall be free of debris. Backfilling shall conform to ASTM F1759, Section 4.2, "Design Assumptions Backfill shall extend at least 42 inches outward from Swirl Concentrator and for the full height of the Swirl Concentrator (including riser(s)) extending laterally to undisturbed soils. AMERICAN STRUCTUREPOINT, INC. APPENDIX B OPERATION, MAINTENANCE, AND INSPECTION 1N20060188 Aqua -Swirl TM Operation, Maintenance, and Inspection Manual for BMP Owners City of Carmel, Indiana (Note: Attach certifications for local regulatory authority including any applicable fees.) Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector Name: Floatable Debris and Oil 1. Remove manhole lid to expose liquid surface of Aqua- Swir1 2. Remove floatable debris with basket or net if any is present. 3. If a hydrocarbon spill has occurred, (e.g. more than a sheen of oil or gas is present) the system should be cleaned immediately (see "Cleaning" Figure 3). Note: Waterin an Aqua- Swirl can appear black like oil due to the dark body of the surrounding structure. Oil appears darker than water in the system and is usually accompanied by debris (e.g. Styrofoam, etc.) with obvious signs of oil stains. The depth of oil can be measured with an oil /water interface probe, a stadia rod with water phylic paste, a coliwasa, or by simply collecting a representative sample with a jar attached to a rod. 4. If hydrocarbon absorbant floc or pads are used, these should be inspected to determine whether they are loaded with hydrocarbons. This will be indicated by a dark colaration of the pad or floc. Pads and /or floc should be removed and disposed of in accordance with City of Indianapolis, and an applicable state and /or federal laws if they contain hydrocarbons. Sediment Accumulation Lower a dipstick tube equipped with a ball valve (e.g. Sludge Judge or similar device) into Aqua- Swirl through the service access provided. Measure the depth of the sludge. At a maximum, the sludge should not exceed 36" depth before maintenance. See Figures 1 and 2. Figure 2 e a d O wner lnformat16 36" AquaSwirl 0 and M Manual Page 1 Change in ownership since last inspection? Y N Figure 1 Ins; ue Diversion Structures If an external diversion structure is present on the site, this should be inspected for the following items. 1. Inspect weir or other structure for structural decay or damage. Weirs are more susceptible to damage than off-set piping and should be checked to confirm that they are not crumbling or decaying. 2. Inspect diversion structure and by -pass piping for signs of structural damage or blockage from debris or sediment accumulation. 3. Measure elevations on diversion weir or piping to ensure it is consistent with site plan design. 4. Inspect downstream structure in diversion system for signs of blockage or structural failure. can Call a local vactor company to remove sediments, oils and other floatable pollutants with a vactor. Dispose of all waste in accordance with City of Indianapolis and any applicable state, and /or federal requirements. Oil should be pumped and removed with any liquids and sediments that have been trapped in the system. These liquids should be taken to an industrial waste water treatment facility for treatment. Liquids and solids pumped from the AquaSwirl should not be dumped back into the stormwater system or into a sanitary sewer. ecttonAcont Figure 3 Note: The AquaSwirl is designed so that entry to the system is not necessary for inspection or maintenance. If, however, you wish to enter the system, this is an OSHA confined space entry and OSHA confined space entry procedures should be followed to enter the system. During Construction Inspect the AquaSwirl every three months (minimum) and clean the system as needed. The AquaSwirl should be inspected and cleaned at the end of construction regardless of whether it has reached its sediment or oil storage capacity. First Year Post Construction Inspect the AquaSwirl every three months and clean the system as needed. Inspect and clean the system once annually regardless of whether it has reached its sediment or floatable pollutant storage capacity. Second and Subsequent Years Post Construction If the AquaSwirl' v did not reach full sediment or floatable pollutant capacity in the First Year Post Construction, the system can be inspected once every six months and cleaned once annually. If the AquaSwirl reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post Construction, the system should be inspected once every six months and cleaned as needed. The AquaSwirl should be cleaned annually regardless of whether it reaches its sediment or floatable pollutant capacity. Bypass Structures Bypass structures should be inspected whenever the AquaSwirl is inspected and maintained as needed. Aqua- SwirI 0 and M Manual Page 2 LO The Jso1 pr o zr, R w VI INTRODUCTION An important component of any Stormwater Pollution Prevention Plan is inspection and maintenance. The StormTech Isolator Row is a patent pending technique to inexpensively enhance Total Suspended Solids (TSS) removal and provide easy access for inspection and maintenance, Looking down the Isolator Row from the manhole opening woven geotextile is shown between the chamber and stone base 1.2 THE ISOLATOR' ROW The Isolator Row is a row of StormTech` chambers, either SC-740 or SC -370 models, that is surrounded with filter fabric and connected to a closely located manhole for easy access. The fabric wrapped chambers provide for settling and filtration of sediment as storm water rises in the Isolator Row and ultimately passes through the filter fabric. The open bottom chambers and perforated side- walls allow storm water to flow both vertically and horizon- tally out of the chambers. Sediments are captured in the Isolator Row protecting the storage areas of the adja- cent stone and chambers from sediment accumulation. Two different fabrics are used for the Isolator Row. A woven geotextile fabric is placed between the stone and the Isolator Row chambers. The tough geotextile provides a media for storm water filtration and provides a durable surface for maintenance operations. It is also designed to prevent scour of the underlying stone and remain intact during high pressure jetting. A non -woven fabric is placed over the chambers to provide a filter media for flows passing through the perforations in the sidewall of the chamber. The Isolator Row is typically designed to capture the "first flush" and offers the versatility to be sized on a vol- ume basis or flow rate basis. An upstream manhole not only provides access to the Isolator Row but typically includes a high flow weir such that storm water flowrates or volumes that exceed the capacity of the Isolator Row overtop the over flow weir and discharge through a manifold to the other chambers. The Isolator Row may also be part of a treatment train. By treating storm water prior to entry into the chamber system, the service life can be extended and pollutants such as hydrocarbons can be captured. Pre treatment best management practices can be as simple as deep sump catch basins; oil -water separators or can be inno- vative storm water treatment devices: The design of the treatment train and selection of pretreatment devices by the design engineer is often driven by regulatory requirements. Whether pretreatment is used or not, the. Isolator Row is recommended by StormTech as an effective means to minimize maintenance requirements and maintenance costs. Note: See the StormTech Design Manual for detailed information on designing inlets for a StormTech system, including the isolator Row. StormTech Isolator Row with Overflow Spillway (not to scale). MANHOLE WITH OVERFLOW WEIR ECCENTRIC HEADER' OPTIONAL ACCESS OPTIONAL PRE TREATMENT STORMTECH ISOLATOR ROW 2 Call StormTech at 888.892.2694 or visit our website at www.stormtech.com for technical and product information. STORMTECH CHAMBERS 1 1 1 1 1 2.0 Is (I la o Row Inspection /Main e a cc CATCH BASIN OR MANHOL 2FT MIN: SUMP 2.1 INSPECTION The frequency of Inspection and Maintenance varies by location. A routine inspection schedule needs to be established for each individual location based upon site specific variables. The type of land use (i.e. industrial, commercial residential), anticipated pollutant load, per- cent Imperviousness, climate. etc. all playa critical role in determining the actual frequency of inspection and maintenance practices. At a minimum, StormTech recommends annual inspec- tions. Initially, the Isolator Row should be inspected every 6 months for the first year of operation: For subsequent years. the inspection should be adjusted based upon previous observation of sediment deposition: The Isolator Row incorporates a combination of standard manhole(s) and strategically located inspection ports (as needed). The inspection ports allow for easy access to the system from the surface,: eliminating the need to perform a confined space entry for inspection purposes. If upon visual inspection it is fount! that sedimenthas accumulated. a stadia rod should be inserted to deter- mine the depth of sediment. When the average depth of sediment exceeds 3 inches throughout the. length of the Isolator Row, clean -out should be performed. 2.2 MAINTENANCE The Isolator Row was designed to reduce the cost of periodic maintenance. By 'isolating" sediments to just one row, costs are dramatically reduced by eliminating the need to clean out each row of the entire storage bed: If inspection indicates the potential need for main- tenance, access is provided via a manhole(s) located on the end(s) of the row for cleanout: If entry into the manhole is required, please follow local and:_OSHA rules fora confined space entries. StormTech Isolator Row (not to scale) 1 --12" MIN ID 25" MAX OD PIPE INSPECTION PORT SET 1.5' FROM BOTTOM LOCATION PER 1 OF CHAMBER ENGINEER'S DRAWING/ COVER ENTIRE ROW WITH AASHTO M288 7 CLASS 2 NON -WOVEN GEOTEXTILE SC -740 -8' WIDE STRIP 1 -STORMTECH SC- 310 5 WIDE STRIP ENDCAP Examples of culvert cleaning nozzles appropriate for Isolator Row maintenance, (These are not StormTech products) Maintenance is accomplished with the JetVac process. The JetVac process utilizes a high pressure water noz- zle to propel itself down the Isolator Row while securing and suspending, sediments: As the nozzle is retrieved, the captured pollutants ,are flushed back into the man- hole for vacuuming. Most sewer and pipe maintenance companies have vacuum /JetVac combination vehicles. Selection of an appropriate JetVac nozzle will improve maintenance efficiency. Fixed nozzles designed for cul- verts or large diameter pipe cleaning are preferable: Rear facing jets with an effective spread of at least 45" are best. Most JetVac reels have 400 feet of hose allow- ing maintenance of an Isolator Row up to 50 chambers long. The JetVac process shall only be performed on StormTech Isolator Rows that have AASHTO class 1 woven geotextile (as specified by StormTech) over their angular base stone. -WOVEN GEOTEXTILE THAT MEETS AASHTO M288 CLASS 1 REQUIREMENTS, BETWEEN STONE BASE AND CHAMBERS SC- 740 5' -6' WIDE STRIP SC- 310 -4' WIDE STRIP Call StormTech at 888.892.2694 or visit our website at www.stormtech.com for technical and product information. 3 1 I 1 1 1 1 1 1 i 1 1 1 1 1 3.0 Isolator Ro Step y Step Ma nten ce Procedures Sample Maintenance Log 3/15/01 9/24/01 6/20/03 7/7/03 63 ft. 6.3 ft. none 6.2 5.8. 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 Rows 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 culvert 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 Stadia Rod Readin•s ixed point Fixed point chambers w to top of i ottotn (1) intent (2 iment 0.1 ft. 0.5 ft. StormTech Isolator Row (not to scale) i3)_, New installation. Fiked point is CI frame at grade djm Some grit felt sm Mucky feet, debris visible in manhole and in ry Isolator row, maintenance due djm System jetted and vacuumed S torrnTd�h® Detention •Retention •Recharge Subsurface Stormwater Management` 20 Beaver Road, Suite 104 1 Wethersfield 1 Connecticut 1 06109 860.529.8188 1 888.892,2694 1 fax 866.328.8401 1 www.stormtech.com StormTech products are covered by one or more of the following patents: U.S. Patents: 5,401,459; 5,511,903; 5,716,163; 5,588,778; 5,839,844; Canadian Patents: 2,158,418 Other U.S. and Foreign Patents PendingPrinted in U.S.A. Copyright. All rights reserved. StormTech LLC, 2004 S090104 -1