Turning Water Around. June 4, Robert Cooper Virginia Department of Environmental Quality 629 Main Street Richmond, VA 23219

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1 Stormwater Solutions June 4, 2014 Turning Water Around Robert Cooper Virginia Department of Environmental Quality 629 Main Street Richmond, VA Re: MTD Registration with VDEQ for the Up-Flo Filter Dear Mr. Cooper: Please accept the enclosed MTD Registration Document and binder of supporting documentation to register the Up-Flo Filter as an approved BMP to remove up to 40% Phosphorus from stormwater runoff. The Up-Flo Filter has been independently tested in the laboratory and in the field, most recently according to the NJDEP-2009 version of the TARP Protocol. Please note that the final NJCAT verification of our TARP field testing study is not yet available although it is expected this month. A copy of the most recent draft report from NJCAT is enclosed in the supporting documentation for your consideration. Dick Magee, the Technical Director of NJCAT, can serve as a reference should you have any questions about the status of the final verification of the Up-Flo Filter TARP report. His is rsmagee@rcn.com and his office phone is (201) Please do not hesitate to contact me if you have any questions about the Up-Flo Filter or the technical documentation contained within this submission. We truly appreciate the opportunity to market the Up- Flo Filter in Virginia. Kind regards, Lisa Lemont, CPSWQ Business Development Manager Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

2 Attachment 1 Manufactured Treatment Device (MTD) Registration 1. Manufactured Treatment Device Name: Up-Flo Filter 2. Company Name: Hydro International Mailing Address: 94 Hutchins Drive City: Portland State: Maine Zip: Contact Name (to whom questions should be addressed): Lisa Lemont, CPSWQ Mailing Address: 94 Hutchins Drive City: Portland State: Maine Zip: Phone number: Fax number: address: llemont@hydro-int.com Web address: 4. Technology Specific size/capacity of MTD assessed (include units): 6-Module Up-Flo Filter sized at 22.7 gpm/sq-ft (given a filter module surface area of 1.1 sq-ft, for a total flow of 25 gpm per Filter Module) Range of drainage areas served by MTD (acres): 1.1 acre per Filter Module (based on TSS mass load rating in attached NJCAT Report). When sized appropriately there is no upper limit on the drainage area served by the Up-Flo Filter. Include sizing chart or describe sizing criteria: Sizing criteria is typically based on the water quality flow rate, dividing the water quality flow rate by 25 gpm per Filter Module and rounding up to determine the most appropriate number of filter modules. When local authorities require sizing by drainage area instead of by water quality flow rate, the total drainage area is divided by 1.1 acres per Filter Module and rounding up to determine the number of Filter Modules needed. Intended application: on-line or offline: Online. TARP Field testing results are for an online unit where 21 of the 30 sampled storms exceeded the Up-Flo Filter s maximum treatment flow rate, therefore the online Up-Flo Filter has been proven to work in the field. Media used (if applicable): CPZ Mix (Carbon, Peat, Zeolite mix) 5. Warranty Information (describe, or provide web address): Hydro International warrants all of its products to be free from defects in materials and workmanship; and will replace, repair, or reimburse at its discretion any part or parts which, after Hydro s examination, Hydro shall have determined to have failed under normal use and 1

3 service by the original user within two years following initial installation. Such repair or replacement shall be free of charge for all items except for (i) those items that are consumable and normally replaced during maintenance, (ii) labor costs incurred by Hydro to obtain access to the part or unit for repair or replacement, (iii) any costs to repair or replace any surface treatment / cover after repair or replacement or (iv) other charges that Hydro may incur incident to such repair or replacement. Repair or replacement of such consumable items shall be subject to assessment of a pro-rated charge based upon Hydro International s estimate of the percentage of normal service life realized by the item. Hydro International s obligation under this Warranty is conditioned upon (a) its receiving prompt notice of claimed defects which shall in no event be later than thirty (30) days following expiration of the above warranty period and (b) owner of the product properly operating, inspecting, maintaining and caring for the product and is limited to repair or replacement as aforesaid. Purchaser agrees that the foregoing warranty is Purchaser s sole remedy under any legal theory whether pleaded in contract, tort, or otherwise. 6. Treatment Type Hydrodynamic Structure X Filtering Structure Manufactured Bioretention System Provide Infiltration Rate (in/hr): Other (describe): 7. Water Quality Treatment Mechanisms (check all that apply) X Sedimentation/settling Infiltration X Filtration with CPZ Mix media Adsorption/cation exchange Chelating/precipitation Chemical treatment Biological uptake Other (describe): 8. Performance Testing and Certification (check all that apply): Performance Claim (include removal efficiencies for treated pollutants, flow criteria, drainage area): - The Up-Flo Filter with CPZ Mix media removes >80% of Total Suspended Solids from stormwater runoff and 40% of Total Phosphorus at a design flow rate of 25 gallons per minute per Filter Module. Specific size/capacity of MTD assessed: 6-Filter Module Up-Flo Filter sized at 25 gpm for a total design flow rate of 150 gpm 2

4 Has the MTD been "approved" by an established granting agency, e.g. New Jersey Department of Environmental Protection (NJDEP), Washington State Department of Ecology, etc. No X Yes; For each approval, indicate (1) the granting agency, (2) use level if awarded (3) the protocol version under which performance testing occurred (if applicable), and (4) the date of award, and attach award letter. 1) NJCAT/NJDEP TARP Tier I (Laboratory) Certification 2) NJCAT TARP Tier II (Field) Certification NJCAT Verification Received in June 2014; NJDEP Certification Pending (currently in review). NJDEP Certification Letter Pending. 3) Washington Department of Ecology Conditional Use Level Designation for Basic Treatment While TAPE field testing on the Up-Flo Filter is ongoing in Washington State, the Up-Flo was grated Conditional Use Level for Basic Treatment (TSS, Oils) due to the results from the TARP study showing that the Up-Flo removed >80% TSS. Was an established testing protocol followed? No X Yes, (1) Provide name of testing protocol followed, (2) list any protocol deviations: TARP Protocol (NJDEP 2009 Amendments) was followed. Deviations from the protocol include: 1) Sizing The Up-Flo Filter was sized more aggressively (i.e., undersized) compared to the sizing required by the NJDEP Amendments to the TARP protocol. Using NJDEP sizing, approximately 38 Filter Modules would have been needed, and only 6 Filter Modules were used in the test unit. Effluent samples included composite subsamples from both treated and bypassed flow so the performance results from the TARP study are considered conservative, as the effluent used to calculate pollutant removal performance contains bypassed (i.e., unfiltered) flow. 2) New Jersey State certification for the analyzing laboratory The NJDEP 2009 Amendments to the TARP Protocol require that the lab that analyzes the samples be a New Jersey statecertified lab. Both a university lab and a state-certified lab were used to analyze results. As discussed in the report, significant issues with the analyses from the State-certified lab arose and were present in their analysis results, therefore the measurements from the statecertified lab were not used and instead only the analysis measurements from the university lab were used. Provide the information below and provide a performance report (attach report): For lab tests: i. Summarize the specific settings for each test run (flow rates, run times, loading rates) and performance for each run: The Up-Flo Filter was tested in the lab using Sil-Co-Sil 106 as the test contaminant. Five runs at the maximum design flow rate of 25 gpm were conducted, ranging from 85.7% removal to 89.7% removal, with an overall 3

5 ii. iii. average 87% removal. See test report attached. If a synthetic sediment product was used, include information about the particle size distribution of the test material: Sil-Co-Sil 106 is a commercially available ground silica product from US Silica having a particle size distribution with 100% of material finer than 212 micron, 98.4% of material finer than 106 micron and a d50 of approximately 16 microns. If less than full-scale setup was tested, describe the ratio of that tested to the fullscale MTD: A full scale commercially available Up-Flo Filter model was used for testing. For field tests: i. Provide the address, average annual rainfall and characterized rainfall pattern, and the average annual number of storms for the field-test location: Address: The TARP field test site was located at 1 Greensboro Ave in Tuscaloosa, AL Average Annual Rainfall: Tuscaloosa, AL (source: Weatherbase) Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Average Rainfall (in) Characterized Rainfall Pattern: Tuscaloosa, AL is in a Type III rainfall distribution pattern characterized by coastal storms with large 24-hour rainfall amounts. Average Annual number of Storms: On average Tuscaloosa, AL has an 90 to 105 days of precipitation per year (NOAA). ii. Provide the total contributing drainage area for the test site, percent of impervious area in the drainage area, and percentages of land uses within the drainage area (acres): Bama Belle TARP Test Site: 4

6 Land Use Area Fraction of Site s Land Use (ft 2 ) (acre) % Parking Space 11, Other Paved 1, Sidewalks 2, Driveways 10, Green Space 12, Total Contributing Area 38, iii. Describe pretreatment, bypass conditions, or other special circumstances at the test site: Pretreatment at TARP Site: None Bypass Conditions: The Up-Flo Filter at the test site included an internal high-flow bypass that would start bypassing flows when the maximum treatment flow rate of 150 gpm was exceeded. Effluent sub-samples were taken downstream of the Up-Flo Filter outlet stub. Subsamples were composited into one large effluent sample bottle for each storm event. For storms that exceeded 150 gpm in peak runoff rate, the Up-Flo Filter results therefore include a flow-proportionate fraction of bypassed (i.e., untreated) flow in the effluent sample, and therefore the performance results from the TARP study are considered conservative. iv. Provide the number of storms monitored and describe the monitored storm events (amount of precipitation, duration, etc.): Storm Event Thirty storms were monitored, of which 29 were qualifying based on rainfall depth, inter-event time period, maximum rainfall intensity and percentage of the storm proportionately covered by sub-sampling. Storm Date Storm Duration Total Precipitation Inter-Event Time since prior rain Maximum 15- Min Rainfall Intensity Samples Coverage of Total Storm Flow (hr) (in) (hr) (in/hr) No. (%) Samples 1 31 May June July July July August

7 7 4 August August September September September October October November December December 2012 Non-qualifying Event December December December January January January February February February March March March March March Total v. Describe whether or not monitoring examined seasonal variation in MTD performance: The field testing period lasted a full calendar year therefore the Up-Flo Filter results reflect average annual performance during all four seasons. vi. If particle size distribution was determined for monitored runoff and/or sediment collected by the MTD, provide this information: Particle size was determined using combined methods of wet sieving, Coulter Counter analysis and filtering. The Up-Flo Filter was shown to remove >81% of particulate matter with a d50 of 29 microns over the course of the monitoring period in spite of bypassing 28% of the total flow (untreated bypass flow comprised a flowproportionate fraction of the effluent samples for the 23 storms that had bypass flows). 9. MTD History: How long has this specific model/design been on the market? 6

8 The Up-Flo Filter has been on the market since The first units were hand-fabricated. The rotationally molded units that are sold now have been available since late List no more than three locations where the assessed model size(s) has/have been installed in Virginia. If applicable, provide permitting authority. If known, provide latitude & longitude: 1) The Shoppes at Sunset Cay, Montena, VA. Permitter Unknown. Lat/Long. Unknown. 2) Potomac Creek Industrial Park, Stafford, VA. Permitter Unknown. Lat/Long. Unknown. 3) Firestone Tire Store, Fredericksburg, VA. Permitter Unknown. Lat/Long. Unknown. List no more than three locations where the assessed model size(s) has/have been installed outside of Virginia. If applicable, provide permitting authority. If known, provide latitude & longitude: 1) Dane County Regional Airport, Madison, WI. Permitted by WI DNR. Lat/Long. Unknown. 2) Marlboro Commons, Marlboro, NJ. Permitted by NJDEP. Lat/Long Unknown. 3) SoCal Disposal, Santa Monica, CA. Permitted by the City of Santa Monica. Unknown. Lat/Long. Unknown. 10. Maintenance: What is the generic inspection and maintenance plan/procedure? (attach necessary documents): Yes. See attached Up-Flo Filter Operation & Maintenance Manual. Is there a maintenance track record/history that can be documented? No, no track record. X Yes, track record exists; (provide maintenance track record, location, and sizing of three to five MTDs installed in Virginia [preferred] or elsewhere): NOTE: Up-Flo Filter Maintenance is tracked when replacement filter media is ordered from Hydro International. If maintenance is conducted only to clean out the sump and not to replace the Filter Bags, Hydro International will have no record of the maintenance. 1) Rappahannock Industrial Park, Fredericksburg, VA. Two (2) 16-Module UFFs. Maintained 6/25/ ) Spotsylvania Town Centre, Fredericksburg, VA. 12-Module UFF. Maintained 9/8/ ) FlightSafety, St. Louis, MO. 1-Moduel UFF. Maintained 2/19/ ) Target Hilldale Mall, Madison, WI. 6-Moduel UFF. Maintained 8/30/ ) Nucor Steel. 6 Module Up-Flo Filter. Tuscaloosa, AL. Maintained 3/23/2010, 5/18/2011, 10/11/2013, 5/06/

9 Recognizing that maintenance is an integral function of the MTD, provide the following: amount of runoff treated, the water quality of the runoff, and what is the expected maintenance frequency for this MTD in Virginia, per year? Total life expectancy of MTD when properly operated in Virginia and, if relevant, life expectancy of media: When operated properly, the life expectancy of the Up-Flo Filter is in line with a 75-year design life due to suitability of rotationally molded PEX and stainless steel components for a stormwater drainage environment. The life expectancy of the CPZ Mix media varies depending on site use. Based on a theoretical solids loading of 200 lb per year, the Up-Flo Filter sized to treat 1.1 impervious acres per Filter Module would be expected to last 1 year before a 10% drop in filtration capacity is expected (refer to Section 4.4 in attached TARP report). For media or amendments functioning based on cation exchange or adsorption, how long will the media last before breakthrough (indicator capacity is nearly reached) occurs? N/A For media or amendments functioning based on cation exchange or adsorption, how has the longevity of the media or amendments been quantified prior to breakthrough (attach necessary performance data or documents)? N/A Is the maintenance procedure and/or are materials/components proprietary? Yes, proprietary No, not proprietary X Maintenance includes both proprietary and non-proprietary aspects. The procedure of maintaining an Up-Flo Filter is non-proprietary. The CPZ Mix media blend is also nonproprietary. The filter bags and replacement drain-down filter are proprietary and must be ordered from Hydro International. Maintenance complexity (check all that apply): X Confined space training required for maintenance X Liquid pumping and transportation Specify method: Vactor truck removal of standing water in sump; transportation to disposal location X Solids removal and disposal Specify method: Vactor truck removal of sediment in sump; removal (by hand) of 2 filter bags per Filter Module. Dispose as per local ordinance requirements (typically landfill). Other noteworthy maintenance parameter (describe): 11. Comments Include any additional explanations or comments: 12. Certification 8

10 Signed by the company president or responsible officer of the organization: I certify that all information submitted is to the best of my knowledge and belief true, accurate, and complete. Signature: Name: _Lisa Lemont, CPSWQ Title: Business Development Manager Date: July 8, 2014 NOTE: All information submitted to the department will be made publically accessible to all interested parties. This MTD registration form will be posted on the Virginia Stormwater BMP Clearinghouse website. 9

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27 February 2014 CONDITIONAL USE LEVEL DESIGNATION FOR BASIC TREATMENT Using CPZ Mix filter media & PILOT USE LEVEL DESIGNATION FOR BASIC TREATMENT Using Hydro Filter Sand, CPS Mix and Perlite filter media Ecology s Decision: For Hydro International, Inc. Up-Flo Filter Based on Hydro International s application submissions, Ecology hereby issues the following use level designations: 1. Conditional use level designation (CULD) for the Up-Flo Filter for basic treatment: Using a carbon-peat-zeolite (CPZ Mix TM ) filter media as specified by Hydro International. Sized at hydraulic loading rate of no more than 22.7 gpm/ft 2 per filter module (given a filter Module surface area of 1.1 ft 2 containing 2 filter bags with combined filter media depth of 8 inches). 2. Pilot use level designation (PULD) for the Up-Flo Filter for basic treatment: Using Hydro Filter Sand media as specified by Hydro International. Sized at hydraulic loading rate of no more than 22.7 gpm/ft 2 per filter module (given a filter Module surface area of 1.1 ft 2 containing 2 filter bags with combined filter media depth of 8 inches). 3. Pilot use level designation (PULD) for the Up-Flo Filter for basic treatment: Using a carbon-peat-sand (CPS Mix TM ) filter media as specified by Hydro International. Sized at hydraulic loading rate of no more than 22.7 gpm/ft 2 per filter module (given a filter Module surface area of 1.1 ft 2 containing 2 filter bags with combined filter media depth of 8 inches). 4. Pilot use level designation (PULD) for the Up-Flo Filter for basic treatment: Using a perlite filter media as specified by Hydro International. Sized at hydraulic loading rate of no more than 22.7 gpm/ft 2 per filter module (given a filter Module surface area of 1.1 ft 2 containing 2 filter bags with combined filter media depth of 8 inches).

28 5. Ecology approves Hydro International Up-Flo Filter systems containing various types of media for treatment at the hydraulic loading rates shown above, and sized based on the water quality design flow rate. Calculate the water quality design flow rate using the following procedures: Western Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute flow rate as calculated using the latest version of the Western Washington Hydrology Model or other Ecology-approved continuous runoff model. Eastern Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute flow rate as calculated using one of the three methods described in Chapter of the Stormwater Management Manual for Eastern Washington (SWMMEW) or local manual. Entire State: For treatment installed downstream of detention, the water quality design flow rate is the full 2-year release rate of the detention facility. 6. The use level designations expire on March 1, 2016 unless extended by Ecology, and to the conditions specified below: Ecology's Conditions of Use: Up-Flo Filter units shall comply with these conditions: 1. Design, assemble, install, operate, and maintain Up-Flo Filter units in accordance with Hydro International's applicable manuals and documents and the Ecology Decision. 2. Hydro International commits to submitting a QAPP for Ecology review and approval by August 1, 2014 that meets the TAPE requirements for attaining a GULD for basic treatment for the CPZ Mix TM, Hydro Filter Sand, CPS Mix TM, and/or perlite media filters. Ecology must review and approve additional QAPPs for each field site in Washington State. Hydro International should select sites reflective of the product's treatment intent. 3. Local jurisdictions must file a Pilot Level Technologies Notice of Intent form with the Department of Ecology prior to authorizing Up-Flo filter for a pilot use level application. 4. Hydro International shall complete all required testing and submit a TER Ecology review by September 1, Hydro International may request Ecology to grant deadline or expiration date extensions, upon showing cause for such extensions. 6. Discharges from the Up-Flo Filter units shall not cause or contribute to water quality standards violations in receiving waters.

29 Applicant: Applicant's Address: Portland, ME, Application Documents: Hydro International 94 Hutchins Drive Field Verification Report: Up-Flo Filter. Bama Belle Test Site for NJDEP Final Field Certification, Tuscaloosa, AL. December 6, Up-Flo TM Filter: Washington Department of Ecology Submission, Version 3.0 (December 2007) which includes: The Up-Flo TM Filter Stormwater Treatment System Product Development and Performance Overview (December 2007) Final Report Upflow Filters for the Rapid and Effective Treatment of Stormwater at Critical Source Areas, U.S. Infrastructure, Inc. July 31, 2003 Field Verification Report for the Up-Flo TM Filter by: Robert Pitt and Uday Khambhammettu, April 2006 Applicant's Use Level Request: General use level designation as a basic, enhanced, phosphorus, and oil treatment device in accordance with Ecology's 2011 Technical Guidance Manual for Evaluating Emerging Stormwater Treatment Technologies Technology Assessment Protocol Ecology (TAPE) Table 2. Applicant's Performance Claims: Using either CPZ Mix, CPS Mix, or perlite filter media, the Up-Flo Filter can meet the performance goals for oil control in runoff from pollution-generating impervious and pervious surfaces at high-use sites. Using either CPZ Mix, filter sand, CPS Mix, or perlite filter media, the Up-Flo TM Filter can remove greater than 80% of total suspended solids in runoff from pollution generating impervious and pervious surfaces on residential, commercial, and industrial sites. Using either CPZ Mix or CPS Mix the Up-Flo TM Filter can remove greater than 50% of total phosphorus in runoff from pollution-generating impervious and pervious surfaces on residential, commercial, and industrial sites. Using the CPZ Mix, the Up-Flo Filter can provide 60% removal of dissolved Zinc and 30% removal of dissolved Copper in runoff from pollution-generating impervious surfaces.

30 Ecology s Recommendations: Ecology finds that: Ecology should provide Hydro International with the opportunity to demonstrate, through additional laboratory and field testing, whether the Up-Flo Filter can attain Ecology's basic treatment goals. Findings of Fact: Hydro International conducted field-testing of an Up-Flo Filter containing CPZ Mix media in Tuscaloosa, Alabama in 2012 and The unit tested included six (6) Filter Modules rates at 25 gpm each (total of 150 gpm). The installation was on-line, with bypass occurring within the unit. Thirty (30) storm events were monitored. The last 10 storm events were not included in the final analysis due to excessive site erosion (although the unit continued to provide sufficient treatment. The peak 5-minute rainfall intensities ranged from 0.16 in/hr to 3.56 in/hr. For 18 (of the 20) qualifying events, influent TSS ranged from 11 to 571 mg/l, with an average influent concentration of 104 mg/l. The average particle size distribution for the 18 storm events was D microns. 17 of the above 18 events had influent TSS concentrations within the TAPE range. Storm event depth for these 17 events ranged from 0.18 to 2.24 inches. For influent TSS > 100 mg/l, average removal rate was 83 percent (median, 90 percent). For influent mg/l, the average effluent was 11.4 mg/l (median, 9.5 mg/l). Based on laboratory testing at a flowrate of 25 GPM per filter module, the Up-Flo Filter containing CPZ Mix media had an average suspended solids concentration removal efficiency of 87% using Sil-Co-Sil 106 with an average influent concentration of about 260 mg/l and zero initial sediment loading. Based on laboratory testing at a flowrate of 23 GPM per filter module, the Up-Flo Filter containing filter sand media had an average suspended solids concentration removal efficiency of 92% using Sit-Co-Sil 106 with an average influent concentration of about 295 mg/l and zero initial sediment loading. Based on laboratory testing at a flowrate of 25 GPM per filter module, the Up-Flo Filter containing CPS Mix media had an average suspended solids concentration removal efficiency of 88% using Sil-Co-Sil 106 with an average influent concentration of about 151 mg/l and zero initial sediment loading. Based on laboratory testing at a flowrate of 25 GPM per filter module, the Up-Flo Filter containing perlite media had an average suspended solids concentration removal efficiency of 88% using Sil-Co-Sil 106 with an average influent concentration of about 103 mg/l and zero initial sediment loading.

31 Other Up-Flo Filter Related Issues to be Addressed By the Company: 1. Hydro International should test a variety of operating rates to establish conservative design rates. Hydro International should also determine pollutant loading capacities of and breakthrough data on the filter media to better predict maintenance cycles. 2. Test the system under normal operating conditions, with a partially filled settling basin. Results obtained for "clean" systems may not be representative of typical performance. 3. Conduct field testing at sites that are indicative of the treatment goals. 4. Conduct testing to obtain information about maintenance requirements in order to develop a maintenance cycle. 5. Conduct loading tests on the filter(s) to determine maximum treatment life of the system. Technology Description: Download at: Contact Information: Applicant: Applicant website: Ecology web link: Ecology: Lisa Lemont, CPSWQ Hydro International 94 Hutchins Drive Portland, Maine, (phone) (fax) llemont@hydro-int.com Douglas C. Howie, P.E. Department of Ecology Water Quality Program (360) douglas.howie@ecy.wa.gov

32 Revision History Date May 2008 May 2009 June 2010 January 2013 April 2013 February 2014 Revision Original Draft Pilot Use Level-Designation document for basic Update Contact Information Extend due dates for QAPP, TER, and Expiration Modified Design Storm Description, added Revision Table, updated contact information Revised due dates and contact information CULD awarded for Up-Flo Filter using CPZ Mix media and revised due dates

33 UP-FLO FILTER HYDRAULIC CHARACTERIZATION OF VARIOUS FILTRATION MEDIA APRIL Hydro International. All rights reserved. 94 Hutchins Drive Portland, ME Tel: Fax:

34 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION TABLE OF CONTENTS 1.0 INTRODUCTION OBJECTIVES THE UP-FLO FILTER TEST FACILITY DESCRIPTION LABORATORY SET UP UP-FLO FILTER CONFIGURATION EFFLUENT MONITORING ARRANGEMENT INFLUENT FLOW RATE TESTING PROCEDURE MEDIA INFLUENT FLOW RATE CALIBRATION FILTRATION FLOW RATE MONITORING EFFLUENT MONITORING EFFLUENT FLOW RATE CALCULATION RESULTS CPZ MIX FILTER SAND CPS MIX PERLITE BYPASS CAPACITY...8 APPENDIX A - TEST UNIT DESCRIPTION...9 DESCRIPTION OF THE UP-FLO FILTER...9 TEST UNIT DESCRIPTION...9 APPENDIX B - TEST FACILITY DESCRIPTION...10 TEST FACILITY GENERAL ARRANGEMENT...10 TEST UNIT PHOTOGRAPHS...11

35 HYDRO INTERNATIONAL 1.0 INTRODUCTION UP-FLO FILTER: HYDRAULIC CHARACTERIZATION Upflow filters are filtration devices that utilize an upward flow path through filtration and absorption media to separate suspended particulate matter and other pollutants out of a liquid. They have been shown to be more efficient than traditional down flow or radial flow filters offering a smaller footprint than down-flow filters because they have a higher flow-through capacity per unit of surface area. Flow in an upward direction counters gravitational forces to fluidize the media allowing the entire depth of the media bed to be utilized. The Up-Flo Filter has been designed as a modular filtration system. Each Filter Module has a treatment capacity of approximately 25 gpm, depending on the filtration media type. Each Filter Module has a surface area of 1.1 ft 2 and up to 6 modules can fit into a 4-ft catch basin (either round or square), for a combined surface area of 6.6 ft 2 and treatment flow rate of up to 150 gpm. Its unique siphon-activated bypass is capable of discharging up to 4 cfs for a standard 4-ft diameter manhole. The principles governing the flow rate through an upflow filter are: - Height of driving head - Filtration bed properties Surface area of filtration bed Bed depth - Media-specific properties Expansion velocity Particle size distribution Density For an upflow filter with a given media composition, bed depth and driving head, the flow rate through the filter will be proportional to the surface area and water pressure head acting on the filtration bed. The flow rate through each Up-Flo Filter Module depends on the height of driving head acting on the top level of the filter media. Generally, filtration rate increases proportionally driving head. The standard Up-Flo Filter is designed with a bypass weir set at 20 inches above the top of the media or 29.5 inches from invert to the bypass weir. 2.0 OBJECTIVES One of the key attributes of the Up-Flo Filter is that its filtration media may be customized to target site-specific pollutants. However, different media will have different flow-through capacities. Because the Up-Flo Filter is most often sized to meet a treatment flow rate, a hydraulic characteristic for each media in the Up-Flo Filter portfolio is required. The objective of the Hydraulic Characterization is to determine the flow rate in gallons per minute per square foot of different media through the Up-Flo Filter. This testing program evaluated the filtration rate of four separate media mixes: Filter Sand, CPZ Mix, CPS, Perlite. 3.0 THE UP-FLO FILTER TEST FACILITY DESCRIPTION 3.1 LABORATORY SET UP The Hydro International test facility contains a 23,000-gallon clean water storage reservoir equipped with a Flygt submersible pump to distribute feed water. The 3-inch Flygt pump delivers water to the Up-Flo Filter through an 8-inch PVC pipe network that freely discharges into the open top of the test tank. The 8-inch PVC delivery line is equipped with clear standpipes and a Hershey VP-820 butterfly valve that redirects flows in excess of the desired influent flow rate back into the feed reservoir. 1

36 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 3.2 UP-FLO FILTER CONFIGURATION The 4-ft x 4-ft polypropylene test tank stands 7-ft high and houses from one (1) to six (6) Up-Flo Filter Modules. The test tank has a 12-inch outlet pipe that discharges into a large underflow basin on the floor of the lab. Two, 2-inch Flygt pumps send water from the underflow basin back into the feed reservoir. A Catch Basin configuration Up-Flo Filter equipped with one (1) Filter Module is used for testing. The Filter Module is filled with two (2) Media Bags and latched shut. A more detailed description of the laboratory set-up can be seen in Appendix A. 3.3 EFFLUENT MONITORING ARRANGEMENT The hydraulic monitoring program determines the flow characteristic of the Up-Flo Filter on a per Filter Module basis. The flow rate of a single module is predicted to be in the gpm range. Due to the low flow rates expected, the methodology of using flow monitoring sensors to determine the flow rate per Filter Module was rejected for the more reliable Volumetric Time-To-Fill test method. A compartmentalized underflow tank is situated next to the test tank. The Up-Flo Filter outlet pipe discharges directly into one of two 18-cubic foot compartments. A 4-gallon bin is also kept on hand to use when filtration flows are suitably low. 3.4 INFLUENT FLOW RATE The flow rate to the Up-Flo Filter can be adjusted from gpm ( cfs) using the notched Hershey VP-820 butterfly valve fixed to the delivery pipework. The chosen influent flow rate will vary with the number of Filter Modules included in the Up-Flo Filter test tank. The testing takes place under steady-state conditions, where the influent flow rate equals the filtration flow rate. The filtration flow rate of each Filter Module is approximately 20 gpm. Accordingly, the target influent flow rate is 20 gpm multiplied by the number of Filter Modules in the test tank. 4.0 TESTING PROCEDURE 4.1 MEDIA Two (2) media bags of a specified filtration media were filled and placed into the Up-Flo Filter Module. 4.2 INFLUENT FLOW RATE CALIBRATION A 3-inch, non-variable Flygt pump delivers flows at a constant rate of 448 gpm (1.0 cfs). A series of butterfly valves, a Hersey VP-820 valve and a notched Hershey VP-812 valve, are used to step the flow down to the desired influent flow rate. Excess flows are directed back to the storage reservoir. When the butterfly valves are being used, the flow rate is calibrated using the Volumetric Time-To-Fill Method. After the valves have been set to their desired notches, time to fill the tank to the 8-cubic feet mark is recorded. The flow rate equals the volume divided by the time-to-fill the volume. 4.3 FILTRATION FLOW RATE MONITORING The filtration rate is determined by monitoring the effluent flow rate of an Up-Flo Filter consisting of one (1) Filter Module EFFLUENT MONITORING The following procedure is used: 1. Place two (2) filled media bags in the Filter Module and latch the Filter Module shut. 2. Plug the weep holes located at the bottom of the Outlet Module. 3. Start the 3 submersible pump and allow it to pump water into the Up-Flo Filter test tank until there is enough driving head to start pushing water up through the filter. 2

37 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 4. Continue to pump flows into the tank until the desired operating head of 20 inches is reached. When the water is at 20 inches of operating head, use the butterfly valves to reduce the influent flows until they are equal to the effluent flows, stabilizing the water level within the Up-Flo Filter test tank. 5. Decant flows from the underflow collection tank by switching on the 2-inch Flygt pump. 6. When the underflow collection tank is decanted, start the stopwatch and turn off the decanting pumps, allowing the effluent to fill the volumetric bin. 7. Be sure to keep the water head in the test tank level at 20 inches by adjusting the butterfly valve on the influent line. 8. Record the amount of time it takes to fill the volumetric bin. 9. Let the water level in the tank drop one (1) inch so that there is an operating head of nineteen (19) inches acting on the filter. Repeat Steps Repeat Step 9 until there is less than one (1) inch of driving head remaining. 11. Stop influent pump. Drain the test unit and prepare to repeat hydraulic characterization EFFLUENT FLOW RATE CALCULATION Calculate the flow rate, Q, for a given operating head using the following calculation: Q (gpm) = Volume of bin (gal) /time-to-fill (min) Equation 1 3

38 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 5.0 RESULTS 5.1 CPZ Mix The CPZ Mix is Hydro International s custom blend of granular activated Carbon, Peat, and manganese-coated Zeolite. The mix is designed to remove fine sediments, metals, nutrients and organics from stormwater runoff. The flow rate through the CPZ Mix was determined to be 24.7 gpm per module at an operating head of 20 inches. The flow rate per Filter Module of the CPZ Mix is shown below in Figure 1. The critical driving head, defined to be the driving head required to initiate flow through the media, was determined to be 6 inches. The critical driving head is denoted by the red data point in Figure 1. CPZ Mix Filtration Rate per Filter Module DRIVING HEAD (in) FILTRATION RATE (gpm) Figure 1 Flow Rate per Unit Area of the CPZ Mix 4

39 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 5.2 Filter Sand The filter sand used in the Up-Flo Filter is a commercially available filter sand that is sized and graded to meet the stringent specifications of AWWA B-100 and the ANSI standards for consistently uniform and chemically inert filter media. The flow rate through the filter sand was determined to be 23.1 gpm per module at an operating head of 20 inches. The flow rate per Filter Module of the filter sand is shown below in Figure 2. The critical driving head, defined to be the driving head required to initiate flow through the media, was determined to be 10 inches. The critical driving head is denoted by the red data point in Figure 2. Filter Sand Filtration Rate per Filter Module DRIVING HEAD (in) FILTRATION RATE (gpm) Figure 2 Flow Rate per Module of Filter Sand 5

40 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 5.3 CPS Mix The CPS Mix is Hydro International s custom blend of granular activated Carbon, Peat, and Filter Sand. The mix is designed to remove fine sediments, metals, nutrients and organics from stormwater runoff. The flow rate through the CP Mix was determined to be 19.6 gpm per module at an operating head of 20 inches. The flow rate per Filter Module of the CPS Mix is shown below in Figure 3. The critical driving head, defined to be the driving head required to initiate flow through the media, was determined to be 6 inches. The critical driving head is denoted by the red data point in Figure CPS Mix Filtration Rate per Filter Module DRIVING HEAD (in) FILTRATION RATE (gpm) Figure 3 Flow Rate per Module of CPS Mix 6

41 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 5.4 Perlite The flow rate through the Perlite was determined to be 28 gpm per module at an operating head of 20 inches. The flow rate per Filter Module of the Perlite is shown below in Figure 4. The critical driving head, defined to be the driving head required to initiate flow through the media, was determined to be 5 inches. The critical driving head is denoted by the red data point in Figure 4. Perlite Filtration Rate per Filter Module DRIVING HEAD (in) FILTRATION RATE (gpm) Figure 4 Flow Rate per Module of Perlite 7

42 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION 6.0 BYPASS CAPACITY The Up-Flo Filter is equipped with a siphonic bypass designed to discharge flows in excess of the treatment flow. When influent flows exceed the filtration capacity, the water level in the Up-Flo Filter chamber rises above the height of the internal bypass weir in the outlet chute. If water levels continue to rise, the outlet chute will fill and displace any air, at which time the siphon is activated. Full-scale hydraulic characterization of the siphonic bypass has been completed. The testing involved installation of the Up-Flo Filter s bypass module into a 4-ft. diameter chamber with enough height to discharge up to 5 cfs. The water elevations are minimized as a result of the siphonic actions. Once water elevation begin to flow over the weir, the siphon is activated between inches which allows a large flow range to be discharged. Due to the suction forces generated by the siphonic action, up to 3.4-cfs can be discharged with a water elevation that does not exceed 34 inches from invert. For flows that exceed 3.4 cfs, the following expression can be used to determine the water elevation above the invert. h = 1.6(Q) (Q) where; Q = flow in cfs h* = water elevation in inches (measured from the invert of the outlet pipe) The minimum height of a standard 4-ft diameter Up-Flo Filter measured from the invert of the outlet pipe is 45 inches, which is equivalent 4.1 cfs. If the stormdrain profile allows for more than 45 inches, additional risers can be supplied to enable a higher water elevation and thus flow. 8

43 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION APPENDIX A - TEST UNIT DESCRIPTION DESCRIPTION OF THE Up-Flo FILTER A full description of the system components and functionality of the Up-Flo Filter is presented in a Flash Animation File found on Hydro International s web page TEST UNIT DESCRIPTION The test unit is fabricated from polypropylene and takes the form of a 4-ft x 4-ft square chamber cylinder approximately 7 ft (2.1m) high. The internal polypropylene components, 4mm perforated, Type 304 stainless steel screen and Type 304 stainless steel support frame are the same as found in actual units. There is no inlet. The set-up simulates a catch-basin insert technology which treats stormwater runoff pouring into a chamber from an overhead grate. The outlet is flanged with a 12 in. (300mm) NP16 flange. The relevant levels are as shown in the drawings and flash animation. In order to clean out the unit and view the sediment storage area, an 18 in. (460mm) access hatch with a clear viewing port is located at sump level. 9

44 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION APPENDIX B - TEST FACILITY DESCRIPTION TEST FACILITY GENERAL ARRANGEMENT 10

45 HYDRO INTERNATIONAL UP-FLO FILTER: HYDRAULIC CHARACTERIZATION TEST UNIT PHOTOGRAPHS Figure A-2: View showing Up-Flo Filter overhead Inlet Pipe, Outlet Pipe and Collection Basin Figure A-3: View Showing a One-Filter Module Set-Up Figure A-4: View showing closed and opened Filter Modules Figure A-5: View showing media bag with Filter Sand being installed in the Filter Module Figure A-6: A close-up view of the Filter Sand Figure A-7: A close-up view of the Hydro International CPZ Mix 11

46 UP-FLO FILTER: CPZ MIX PERFORMANCE REPORT FOR REMOVAL OF SIL-CO-SIL 106 April 2006 Hydro International 94 Hutchins Drive Portland, ME Tel: (207) Fax: (207)

47 TABLE OF CONTENTS 1.0 INTRODUCTION THE UP-FLO FILTER TEST FACILITY DESCRIPTION LABORATORY SET UP UP-FLO FILTER CONFIGURATION FLOW RATE INFLUENT FEED SAND GRADATION SEDIMENT LOADING TESTING PROCEDURE PARTICLE SIZE DISTRIBUTION FLOW RATE CALIBRATION TSS PERFORMANCE TESTING CONCLUSIONS... ERROR! BOOKMARK NOT DEFINED. APPENDIX A - TEST UNIT AND FACILITY DETAILS... 5 Test unit description... 5 Test Facility General Arrangement... 6 Test unit photographs... 7 APPENDIX B - TEST DATA AND CALCULATIONS... 9 Copyright This document and its contents are the property of Hydro International and may not be copied or modified in any way without prior written permission of Hydro International.

48 1 HYDRO INTERNATIONAL UP-FLO FILTER CPZ MIX PERFORMANCE REPORT FOR REMOVAL OF SIL- CO-SIL INTRODUCTION The Up-Flo Filter is a high rate, modular filtration system designed to meet the most stringent stormwater treatment regulations. It incorporates multiple elements of a treatment train design into a single, small-footprint device. The Up-Flo Filter is engineered to remove over 80% of fine TSS and associated pollutants. Filter Media can be customized to target site-specific pollutants. This test evaluated the TSS removal performance of Hydro International s custom CPZ Mix. The CPZ Mix is a blend of activated Carbon, Peat, and manganese-coated Zeolite. 2.0 THE UP-FLO FILTER TEST FACILITY DESCRIPTION 2.1 LABORATORY SET UP The Hydro International test facility contains a 23,000-gallon clean water storage reservoir equipped with a Flygt submersible pump to distribute feed water. The 3 Flygt pump delivers water to the Up-Flo Filter through an 8-inch PVC pipe network that freely discharges into the open top of the test tank. The 8-inch PVC delivery line is equipped with clear standpipes and a Hershey VP-820 butterfly valve that redirects flows in excess of the desired influent flow rate back into the feed reservoir. A Watson Marlow 704 S/R peristaltic pump conveys slurry from a slurry tank into the delivery line via a standpipe about 3-feet upstream from the Up-Flo Filter. 2.2 UP-FLO FILTER CONFIGURATION The 4-ft x 4-ft polypropylene test tank stands 7-ft high and houses from one (1) to six (6) Up-Flo Filter Modules. The test tank has a 12-inch outlet pipe that discharges into a large underflow basin on the floor of the lab. Two, 2-inch Flygt pumps send water from the underflow basin back into the feed reservoir. A Catch Basin configuration Up-Flo Filter equipped with 1 Filter Module was used for testing. The Filter Module housed two (2) media bags filled with Hydro International s custom CPZ Mix then latched shut. A more detailed description of the laboratory setup can be seen Appendix A. 2.3 FLOW RATE The flow rate to the Up-Flo Filter can be adjusted from gpm ( cfs) using the notched Hershey VP-820 butterfly valve fixed to the delivery pipework. J:\Stormwater Regulatory Approvals\Virginia\VDEQ\Supporting documentation\upflo 106 TSS Report-CPZMix.doc

49 2 The filtration capacity of a Filter Module depends on the filter media housed with the module and the height of driving head acting on the filter media. This test evaluated the performance of a one-module set up with a flow capacity of 25 gpm at 20 inches of driving head. To test the Filter Module at steady state conditions, the influent flow rate was set to 25 gpm. 2.4 INFLUENT FEED SAND GRADATION The Up-Flo Filter targets the removal of fine sediment. Commercially available feed sands of different grades are selected to best represent the sediment likely to be encountered at a project location. For this Up-Flo Filter test, Sil-Co-Sil 106 was used as the feed sand. 2.5 SEDIMENT LOADING This test targeted a sediment loading concentration in the mg/l range. For flow rates suitable for the one-filter Module set-up, 1.25 lbs Sil-Co-Sil 106 was adequate for attaining the desired influent sediment load. 3.0 TESTING PROCEDURE 3.1 PARTICLE SIZE DISTRIBUTION Particle size analysis was performed on each blend to ensure that it conforms to the target gradation. Because Sil-Co-Sil 106 is composed of very fine particles, the particle size distribution was tested according to ASTM D422 (AASHTO T88). 3.2 FLOW RATE CALIBRATION A 3-inch, non-variable Flygt pump delivered flows at a constant rate of 448 gpm (1.0 cfs). A series of butterfly valves, a Hersey VP-820 valve and a notched Hershey VP- 812 valve, were used to step the flow down to the desired influent flow rate of 25 gpm. Excess flows were redirected to the storage reservoir. The flow rate was calibrated using the Volumetric Time-To-Fill Method. After the valves had been set to their desired notches, time to fill the tank to the 8-cubic feet mark was recorded. The flow rate equals the volume divided by the time-to-fill the volume. 3.3 TSS PERFORMANCE TESTING INFLUENT AND EFFLUENT SAMPLING The following sampling procedure was used: J:\Stormwater Regulatory Approvals\Virginia\VDEQ\Supporting documentation\upflo 106 TSS Report-CPZMix.doc

50 3 1. Accurately weigh out a bulk sample of the influent feed sand. Ideally, 1.25 lbs should be used for a Sil-Co-Sil 106 slurry mixture being filtered by a 1-Filter Module Up-Flo Filter. 2. Start the 3 submersible pump and allow it to pump water into the Up-Flo Filter test tank until there is enough driving head to start pushing water up through the filter. Continue to pump flows into the tank until the desired operating head of 20 inches is reached. When the water is at 20 inches of operating head, use the butterfly valves to reduce the influent flows until they are equal to the effluent flows, stabilizing the water level within the Up-Flo Filter test tank. 3. Start the stopwatch as switch on the Watson Marlow peristaltic pump to begin feeding the influent feed slurry into the 6-inch diameter standpipe in the Up-Flo Filter line at a constant rate. 4. While the sand is being fed, watch the water level in the test chamber at regular intervals. Be sure that the water level in the chamber is not rising or falling below 20 inches of operating head. If the water level is rising or falling, adjust the flow rate accordingly and steady it at 20 inches of operating head. 5. When the stopwatch reads 12:00 minutes and steady-state conditions have been reached, take grab samples of the influent and effluent. Two lab technicians may be required to take the samples simultaneously. 6. Take five (4) more samples at 1 minute intervals. This yields a total of 10 samples. 7. Stop the sampling and test. Stop the pumps, stirring motor and automatic sampler. 8. Drain the test unit. Flush the test unit out twice. Clean the test unit and prepare for the next round of testing. 4.0 ANALYSIS 4.1 SAMPLE ANALYSIS A total 15 pairs of influent and effluent samples were collected during three different laboratory trials. The samples were analyzed using an equivalent standard to the TSS Test Method 2 Filtration in ASTM, 1999, D Specifically, the Standard Methods 19th Ed 1995 for the Examination of Water and Wastewater prepared and published by the American Public Health Association (APHA), American Water Works Association (AWWA), and Water Environment Federation (WEF) chapter D Total Suspended Solids Dried at deg C is used. 4.2 DATA ANALYSIS The % of Sil-Co-Sil 106 removed for each sample pair was determined using Equation 1: Eq. 1 % Removal = 100 x ( [TSS] inflow [TSS] outflow ) / [TSS] inflow The average % Removal for each laboratory trial was calculated using Equation 2: J:\Stormwater Regulatory Approvals\Virginia\VDEQ\Supporting documentation\upflo 106 TSS Report-CPZMix.doc

51 4 Eq. 2 Avg. % Removal = 100 x ( [TSS] Mean inflow [TSS] Mean outflow ) / [TSS] Mean inflow Test data and calculations can be seen in Appendix B. 5.0 Conclusions Based on laboratory testing, the Up-Flo Filter CPZ Mix will remove over 87% of Sil- Co-Sil 106 at 25 gpm per Filter Module. J:\Stormwater Regulatory Approvals\Virginia\VDEQ\Supporting documentation\upflo 106 TSS Report-CPZMix.doc

52 5 Appendix A - Test Unit and Facility Details Description of the Up-Flo Filter A full description of the system components and functionality of the Up-Flo Filter is presented in a Flash Animation File found on Hydro International s web page Test unit description The test unit is fabricated from polypropylene and takes the form of a 4-ft x 4-ft square chamber cylinder approximately 7 ft (2.1m) high. The internal polypropylene components and Type 304 stainless steel support frame are the same as found in actual units. There is no inlet. The setup simulates a catch-basin insert technology which treats stormwater runoff pouring into a chamber from an overhead grate. The outlet is flanged with a 12 in. (300mm) NP16 flange. The relevant levels are as shown in the drawings and flash animation. In order to clean out the unit and view the sediment storage area, an 18 in. (460mm) access hatch with a clear viewing port is located at sump level. The 4-ft square Up-Flo Filter test unit has an effective treatment volume equal to: V= l w h = ft = 40.0 ft 3 (1.13 m 3 ); where h=2.5 ft, l=w=2 ft - where l = length of treatment unit w= width of treatment unit h = distance between top of sump volume and invert of internal bypass weir (which excludes the sediment storage area in the sump). The theoretical residence time is equal to the amount of time it takes one (1) unit volume to pass through the system at a given flow rate assuming plug flow conditions (no underflow). The residence time for the Up-Flo Filter depends on the peak treatment flow rate. The peak treatment flow rate depends on the number of Filter Modules included in the system as well as the media housed within the Filter Modules. The following residence time calculation is for one (1) Filter Module housing the CPZ Mix : t r = treatment volume/flow rate = (300 gal)/(25 gal/min) = 12 minutes

53 Test Facility General Arrangement 6

54 7 Test unit photographs View Showing Up-Flo Filter Overhead Inlet Pipe, Outlet Pipe and Collection Basin View Showing a One-Module Set-Up

55 8 View Showing closed and opened Filter Modules A close-up view of Hydro International s CPZ Mix

56 9 Appendix B Test Data and Calculations Sil-Co-Sil 106 Particle Size Distribution 100% 90% 80% %FINER THAN 70% 60% 50% 40% 30% 20% Sil-co-Sil % 0% MICRONS Sil-Co-Sil 106 Removal Test 300 TSS Concentration (mg/l) Influent Effluent Sample

57 10 INFLUENT EFFLUENT Sil-Co-Sil 106 Testing Media CPZ Mix Media Bag Material 200 NMO # of Filter Modules Used = 1 Test #: 1 Peristaltic Pump Speed = 80 rpm Done By: LG Weight of Sand = 1.25 lb Date: 3/30/2006 Volume of Water = 40 gallons Driving Head: 20" head Influent Flow Rate = 25 gpm Combined Empty Mass Combined Dried Mass Sample Volume (ml) Volume (L) (g) (g) Mass (mg) mg/l AVG Combined Empty Mass Combined Dried Mass Sample Volume (ml) Volume (L) (g) (g) Mass (mg) mg/l AVG Notes: *Weep holes were opened Total Efficiency = % during testing. Efficiency Sample 1 = % Efficiency Sample 2 = % Efficiency Sample 3 = % Efficiency Sample 4 = % Efficiency Sample 5 = %

58 Product Data SIL-CO-SIL 106 GROUND SILICA PLANT: PACIFIC, MISSOURI PERCENT TYPICAL VALUES (% CUM RETENTION) U.S.A. SIEVE ANALYSIS MESH USA STD SIEVE SIZE MICRONS TYPICAL VALUES % RETAINED % PASSING INDIVIDUAL CUMULATIVE CUMULATIVE TYPICAL PHYSICAL PROPERTIES TYPICAL CHEMICAL ANALYSIS, % Hardness (Mohs) 7 Melting Point (Degrees F) 3100 Mineral Quartz ph 7.5 Reflectance (%) 88 Yellowness Index 3.5 Specific Gravity 2.65 SiO 2 (Silicon Dioxide) 99.8 Fe 2 O 3 (Iron Oxide) Al 2 O 3 (Aluminum Oxide) 0.16 TiO 2 (Titanium Dioxide) 0.01 CaO (Calcium Oxide) 0.02 MgO (Magnesium Oxide) <0.01 Na 2 O (Sodium Oxide) <0.01 K 2 O (Potassium Oxide) 0.01 LOI (Loss On Ignition) 0.1 July 20, 1999 U.S. Silica Company 8490 Progress Drive, Suite 300 Frederick, MD (301) (phone) (800) (toll-free) ussilica.com DISCLAIMER: The information set forth in this Product Data Sheet represents typical properties of the product described; the information and the typical values are not specifications. U.S. Silica Company makes no representation or warranty concerning the Products, expressed or implied, by this Product Data Sheet. WARNING: The product contains crystalline silica quartz, which can cause silicosis (an occupational lung disease) and lung cancer. For detailed information on the potential health effect of crystalline silica - quartz, see the U.S. Silica Company Material Safety Data Sheet.

59 Operation and Maintenance Manual Up-Flo Filter Filtration System for Stormwater Treatment Stormwater Solutions Turning Water Around...

60 Page 2 Up-Flo Filter Operation and Maintenance Manual Table of Contents 3 Up-Flo Filter - Overview - General Product Description - Typical Configurations - Maintenance Services 4 Operation - Introduction - Pollutant Capture - Reduced Clogging - Overflow Protection - Good Housekeeping & Best Practices - Damage Due to Lack of Maintenance 5 Inspection & Maintenance - Overview - First-Year Monitoring - Inspection - Maintenance Activities Not Requiring Man Entry - Floatables, Oil and Sump Cleanout - Maintenance Activities Requiring Man Entry - Replacement of Media Packs and Drain Down Filter - Solids Disposal 13 Up-Flo Filter Installation Log 14 Up-Flo Filter Inspection Log 16 Up-Flo Filter Maintenance Log 17 Stormwater BMP Maintenance Certification Program IMPORTANT - ORDER REPLACEMENT PARTS FOR MAINTENANCE - IMPORTANT Annual maintenance requires replacement of the Media Packs and the Drain Down Filter. Contact Hydro International to order replacements. Allow 2-4 weeks for delivery. Office hours Monday thru Friday 8:00 A.M. to 5:00 P.M. EST Toll free: Phone: Fax: stormwaterinquiry@hydro-int.com COPYRIGHT STATEMENT: The contents of this manual, including the drawings and specifications contained herein or annexed hereto, are intended for the use of the recipient to whom the document and all associated information are directed. Hydro International plc owns the copyright of this document (including any drawings or graphics), which is supplied in confidence. It must not be used for any purpose other than that for which it is supplied and must not be reproduced, in whole or in part, stored in a retrieval system or transmitted in any form or by any means without prior permission in writing from Hydro International plc. Up-Flo Filter is a trademarked filtration device of Hydro International plc. A patent covering the Up-Flo Filter has been granted. DISCLAIMER: Information and data contained in this manual is exclusively for the purpose of assisting in the operation and maintenance of Hydro International plc s Up-Flo Filter. No warranty is given nor can liability be accepted for use of this information for any other purpose. Hydro International plc have a policy of continuous product development and reserve the right to amend specifications without notice. Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

61 Page 3 Up-Flo Filter Operation and Maintenance Manual Product Overview The Up-Flo Filter is a modular high-rate stormwater filtration device. As shown below, it is typically installed into a 4-ft diameter catch basin structure. Each Filter Module has a screen and support bracket that is attached to the concrete manhole and each contains a Media Pack that includes Flow Distribution Media and two Media Bags (Fig.1). Modules can attach to each other to form a ring of up to six modules. Up to two of the modules are attached to an Outlet Module that has a Bypass Hood and Drain Down Filter. The modular design can be supplied in different configurations depending on the application as shown in the following illustrations. An upward flow path through the Filter Modules allows stormwater to be screened and filtered. In addition to the screening and filtering processes, gross pollutants will also settle into the sump or float to the surface of the water held within the manhole. The standard units are supplied with a 3-ft (0.9m) sump to allow for sediment and gross pollutant accumulations between maintenance intervals. The following manual describes the operation of the Up-Flo Filter and provides general maintenance requirements that will ensure the filter will continue to operate and perform as intended. In general, a minimum of two inspections are required per year to monitor sediment and gross pollutant accumulations. In order to achieve an annual TSS removal rate of 80% for the Up-Flo Filter, the minimum maintenance frequency specified in the maintenance section for replacement of the Media Pack and removal of accumulated sediment from the sump is mandatory. Hydro International offers recommendations for certified maintenance contractors. It is hoped that owners will take advantage of this service as these contractors have been trained and certified to ensure that maintenance will be performed properly. Should the owner choose to conduct maintenance procedures themselves, it is recommended that Hydro International be contacted to discuss the following procedures and consider contracting a representative from Hydro International for the first maintenance cycle. See page 17 for more about Hydro International s Stormwater BMP Maintenance Contractor Certification Program. 1 Up-Flo Filter Components 1. Inlet Grate 2 2. Siphonic Bypass Hood with Floatables Baffle 3. Filter Module Outlet Module 5 5. Media Pack 6. Angled Screen Drain Down Filter Assembly (refer to Fig.10 for closer view) 8. Sump 8 Fig.1 The components of the Up-Flo Filter.

62 Page 4 Up-Flo Filter Operation and Maintenance Manual Operation Introduction The Up-Flo Filter operates on simple fluid hydraulics. It is selfactivating, has no moving parts, no external power requirements and is fabricated with durable non-corrosive components. Personnel are not required to operate the unit and maintenance is limited to periodic inspections, sediment and floatables removal, Media Pack replacement and Drain Down Filter replacement. Pollutant Capture The Up-Flo Filter is designed to operate as a treatment train by incorporating multiple treatment technologies into a single device. Trash and gross debris are removed by sedimentation and screening before they are introduced to the filtration media, preventing surface blinding of the filter media. The Up-Flo Filter is a wet-sump device. Between storm events, oil and floatables are stored on the water surface separate from the sediment storage volume in the sump (see Fig.2). The high-capacity bypass siphon acts as a floatables baffle to prevent washout of captured floatable pollutants during high intensity events. Drain Down Filter Angled Screen Outlet Module with Bypass Hood Filter Module Floating Debris Settled Solids Reduced Clogging The Up-Flo Filter has been designed to minimize the occurrence Fig.2 Pollutants captured in the Up-Flo Filter. of clogging and blinding. The Up-Flo Filter employs a unique Drain Down Filter that allows the water level in the chamber to drop below the filter media between events. The Drain Down Filter mechanism creates a reverse flow that flushes captured pollutants off the surface of the Media Bag, helping to prevent blinding. By allowing the water to drain out, the Drain Down Filter also reduces the weight of the Media Bags. This makes the bags easier and safer to remove during maintenance operations. Overflow Protection The Angled Screens are designed to prevent ragging and blinding. The Angled Screens are situated below the Filter Modules, sheltering them from the direct path of the influent. Coarse debris settles in the sump before the runoff flows up through the screens, protecting them from blinding. In the unlikely event of a blockage, the high capacity siphonic Bypass Hood is designed to convey high enough flow to minimize the risk of large storm creating upstream flooding. Good Housekeeping & Best Practices Good housekeeping practices upstream of the Up-Flo Filter can significantly extend Media Bag life. For example, sweeping paved surfaces, collecting leaves and grass trimmings, and protecting bare ground from erosion will reduce loading to the system. Media Packs should not be installed in the Filter Modules until construction activities are complete and site stabilization is effective. Damage Due to Lack of Maintenance Delayed maintenance would result in clogged Media Bags and/or blinded Angled Screens. In that situation, the Up-Flo Filter would go into bypass and there would be no treatment of the incoming stormwater. Because the Bypass Weir can easily convey all of the flow to the Outlet Module, there would be no lasting damage to the system. Replacement of the Media Bags and removal of sediment from the sump would restore the Up-Flo Filter to its original treatment efficiency. Establishing and adhering to a regular maintenance schedule ensures optimal performance of the system. Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

63 Page 5 Up-Flo Filter Operation and Maintenance Manual Inspection & Maintenance Overview The Up-Flo Filter protects the environment by removing a wide range of pollutants from stormwater runoff. Periodic removal of these captured pollutants is essential to the proper functioning of the Up-Flo Filter. Maintenance activities can be categorized as those that may be performed from outside the Up-Flo vessel and those that are performed inside the vessel. Maintenance performed from outside the vessel includes removal of floatables and oils that have accumulated on the water surface and removal of sediment from the sump. Maintenance performed inside the vessel includes removal and replacement of Media Bags, Flow Distribution Media and the Drain Down Filter. A vactor truck is required for removal of oils, water, sediment, and to completely pump out the vessel to allow for maintenance inside. OSHA Confined Space Entry procedures must be followed when entering the Up-Flo vessel. The Up-Flo Filter design allows for easy and safe inspection, monitoring and clean-out procedures. It has a wide central opening between the Filter Modules for easy and comfortable access to all of the components (see Fig.3). Completion of all the maintenance activities for a typical manhole Up-Flo Filter takes less than one hour. In the case of inspection and floatables removal, a vactor truck is not required. Otherwise, a vactor truck is normally required for oil removal, removal of sediment from the sump, and replacement of the Media Packs and Drain Down Filter. In most cases, entry into the Up-Flo Filter vessel is required for replacement of the Media Packs and Drain Down Filter, and OSHA Confined Space Entry procedures will have to be followed. a. Manhole b. Vault Fig.3 The Up-Flo Filter is installed in a) 4-ft (1.2m) round manholes or b) in rectangular precast vaults. Both configurations have a wide central opening in the Up-Flo Filter. Maintenance activities include inspection, floatables removal, oil removal, sediment removal, Media Pack replacement, and Drain Down Filter replacement. The minimum required frequency for replacement of the Media Pack is annually, whereas the minimum required frequency for removal of accumulated sediment from the sump is dependent on the Up-Flo Filter configuration. Configurations with a larger sediment storage volume per module will require less frequent removal of accumulated sediment. Regardless, whenever sediment depth in the sump is found to be greater than 16 inches, sediment removal is required.

64 Page 6 Up-Flo Filter Operation and Maintenance Manual First Year Inspection and Maintenance The frequency of inspection and maintenance can be determined in the field after installation. The frequency of ongoing maintenance needs is based on site characteristics such as contributing area, types of surfaces (e.g., paved and/or landscaped), site activities (e.g., short-term or long-term parking), and other site maintenance (e.g., sanding and sweeping). At a minimum, inspection and maintenance should be conducted at intervals of no more than six months during the first year of operation. Maintenance personnel should observe and record pollutant accumulations during the first year of service in order to benchmark the maintenance intervals that will later be established for the site. Pollutant accumulations should be measured or monitored using the following procedures: Measurement of sediment depth in the sump: A minimum of 8 inches (20 cm) should separate the Drain Down Filter inlet from stored sediment in the sump in order to minimize sediment migration into the Drain Down Filter. A simple probe, such as the Sludge-Judge, can be used to determine the depth of the solids in the sump. In a typical 4-ft (1.2m) diameter manhole installation, the sediment depth should be no more than 16 inches (41 cm). Maintenance personnel should then enter the structure, remove the Media Pack from one of the Filter Modules, and weigh the Media Bags. Media Bags with a wet weight of approximately 40 lbs (18 kg) or more are an indication that the filter media has become full and that the Media Packs in all of the Filter Modules will require replacement (Fig.4). Minimum filtration rate is generally reached when the Media Bags have accumulated approximately 20 lbs (9 kg) of sediment. Determining the amount of accumulated sediment will be accomplished by removing both of the Media Bags from one of the Media Packs and weighing the bags separately. Since a new Media Bag weighs approximately 30 lbs (14 kg) wet, the difference in weight will approximately equal the weight of solids that have accumulated in the bag. A spent Media Bag weighs approximately 50 lbs (23 kg) wet. a. Measurement of oil layer on water surface: Since water in the Up-Flo vessel drains down to an elevation below the bottom of the Filter Modules when the system is idle, the amount of accumulated oil must be minimized so that oil is not entrained in the Media Pack when stormwater begins to fill the vessel at the start of a storm event. Oil accumulation should be limited to 1.5 inches (4 cm) or less. Probes can be used to measure oil thickness. Monitoring for Drain Down Filter clogging: The water level in the Up-Flo Filter should be monitored to ensure that the Drain Down Filter is operating properly. The Drain Down Filter is designed to lower the water level in the Upb. Flo vessel to an elevation below the bottom of the Filter Modules between storm events. Periodically conduct an inspection one to two days after a storm event during the first year of operation. Approximately 36 hours after a Fig.4 a) A new Media Bag of Hydro Filter Sand. b) A spent 1-in (2.5-cm) rainfall, the water level inside the vessel should have dropped media bag of Hydro Filter Sand. to a point where it is equal with the base of the Filter Modules. If the water level has not reached that point, then the Drain Down Filter has either become clogged or blinded by trash or debris (Fig.5 a and b). If there is no evidence of trash or debris around the Drain Down Filter inlet, then it has likely become clogged with particles. Monitoring for slime and debris covering the Flow Distribution Media or Angled Screens: After removal of the Media Bags, the bottom Flow Distribution Media should be removed and inspected to determine if it is coated with slime or debris. Similarly, the Angled Screen should be inspected for blockages and ragging. Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

65 Page 7 Up-Flo Filter Operation and Maintenance Manual Monitoring for floatables on the water surface: Similar to oil, the amount of accumulated floatables must be minimized to prevent trash and loose debris from becoming trapped on the Angled Screens when stormwater begins to fill the Up-Flo vessel at the start of a storm event. Visual inspection is adequate to determine the amount of floatables. Floatables should be removed before they form a mat on the surface of the water. The solids loading rate in the sump will be calculated by measuring the sediment depth in the sump and dividing the depth by the correlating interval of time since the sump was last cleaned. Similarly, starting with fresh Media Bags, the solids loading rate in the Media Packs will be calculated by weighing the Media Bags and dividing the weights by the correlating interval of time since they were installed. The wet weight of the heaviest bag will be used to determine the loading rate. As previously mentioned, a spent Media Bag weighs approximately 50 lbs (23 kg) wet. The spent Media Bag weight estimate was based on calculations of sediment loading in an Up-Flo Filter that was run to exhaustion during laboratory testing. The rate of oil accumulation will be calculated by measuring the thickness of the oil layer and dividing the thickness by the correlating interval of time since the sump was last cleaned. Ordinarily, oil thickness will not be measurable unless a spill has occurred. Consequently, any oil will typically be removed along with water when cleaning the sump. Monitoring the Drain Down Filter for clogging, monitoring the Flow Distribution Media and Angled Screens for slime and debris, and monitoring the accumulation of floatables will provide an estimate of how long the Up-Flo Filter can operate before its performance can become impaired by one of these factors. a. b. Fig.5 a) The water level in a properly functioning Up-Flo Filter will drain down to the base of the Filter Modules. b) When the Drain Down Filter becomes clogged, the base of the Filter Modules will be submerged in standing water. Note, above right, that the Drain Down Filter is submerged in standing water. Routine Inspection and Maintenance After completion of the first year of operation, determining and then following the established inspection and maintenance intervals will keep pollutant loadings within their respective limits. Removal of oils and floatables, replacement of the Drain Down Filter, replacement of Flow Distribution Media (see Fig.9, pg 11), and cleaning of Angled Screens will occur at the same frequency as cleaning of the sump and replacement of Media Bags unless the first year of operation indicates otherwise. Keeping to the established maintenance intervals will keep treatment flow rates at, or above, the design flow rate. Typically, annual maintenance is adequate. In addition to scheduled maintenance, occasional checks for Up-Flo Filter clogging can be performed by removing the manhole cover during a storm, monitoring the water level in the manhole or vault, and determining whether the filter is in bypass. A properly-sized filter (on-line or off-line) that is in bypass during a storm that is producing runoff at, or below, the filter s design filtration rate needs maintenance.

66 Page 8 Up-Flo Filter Operation and Maintenance Manual Routine Inspection Routine Inspection Procedures Inspection is a simple process that requires monitoring pollutant accumulations. Maintenance crews should be familiar with the Up-Flo Filter and its components prior to inspection. Scheduling Inspection may be conducted during any season of the year but should occur shortly after a predicted rainfall to ensure components are operating properly. Recommended Equipment Safety Equipment and Personal Protective Equipment (traffic cones, work gloves, etc.) Scale to measure the weight of the Media Bags Crow bar to remove grate or lid Pole with skimmer or net Sediment probe (such as a Sludge-Judge ) Hydro International Up-Flo Filter Maintenance Log Trash bags for removed floatables 1. Set up any necessary safety equipment (such as traffic cones) to provide access to the Up-Flo Filter. Safety equipment should notify passing pedestrian and road traffic that work is being done. 2. Remove the grate or lid to the manhole or vault. 3. Without entering the vessel, look down into the chamber to inspect the inside and to determine whether the high-water level indicator has been activated. Make note of any irregularities. See Fig.6 for a typical Inspection View. 4. Without entering the vessel, use the pole with the skimmer net to remove floatables and loose debris from the chamber. 5. Using a sediment probe such as a Sludge-Judge, measure the depth of sediment that has collected in the sump of the vessel. Maximum sediment depth is 16 inches (41 cm). 6. If the high-water level indicator has been activated after two consecutive storms, remove the Filter Module lid by turning the cam latch and remove the Filter Media Pack (refer to page 11 Replacement Procedures). Weigh the Media Bags from one or two modules. Media Bags should be replaced if the wet weight exceeds 40 lbs (18 kg). 7. On the Maintenance Log provided by Hydro International, record the date, unit location, estimated volume of floatables and gross debris removed, and the depth of sediment measured. Also note any apparent irregularities such as damaged components or a high standing water level (see Fig.6 for the standard standing water level). 8. Securely replace the grate or lid. 9. Remove safety equipment. 10. Contact Hydro International at (800) to discuss any irregularities noted during inspection. Bypass siphon sits evenly on Outlet Module. Standing water level is no higher than the base of the Filter Module. The Drain Down Filter will be visible if the water level is correct. Filter Module Lids are closed. Fig.6 Inspection view of the Up-Flo Filter. Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

67 Page 9 Up-Flo Filter Operation and Maintenance Manual Routine Maintenance Maintenance activities are grouped into two categories: Activities Not Requiring Man Entry Into the Up-Flo Filter These activities include floatables removal, oil removal and removal of sediment from the sump. Activities Requiring Man Entry Into the Up-Flo Filter Media Pack replacement and Drain Down Filter replacement. Maintenance intervals are determined from monitoring the Up-Flo Filter during its first year of operation. Depending on the site, some maintenance activities may have to be performed on a more frequent basis than others. In the case of floatables removal, a vactor truck is not required. Floatables and loose debris can be netted with a skimmer and pole. A vactor truck is normally required for oil removal, removal of sediment from the sump, and to dewater the vessel for replacement of the Media Packs and Drain Down Filter (Fig.7). All inspection and maintenance activities would be recorded in an Inspection and Maintenance Log. Completion of all the maintenance activities for a typical 4-ft (1.2m) diameter manhole installation takes less than one hour. Approximately 360 gallons of water and up to 0.6 yd 3 (0.5 m 3 ) of sediment may be removed in the process. In an installation equipped with six Filter Modules, 12 Media Bags (2 bags per module) would be removed and replaced. Assuming a spent Media Bag weight of 50 lbs (23 kg), up to 600 lbs (272 kg) of spent Media Bags would be removed. All consumables, including Media Bags, Flow Distribution Media, and replacement Drain Down Filters are supplied by Hydro International. Maintenance Activities Not Requiring Man Entry These activities include floatables removal, oil removal and removal of sediment from the sump. Scheduling Floatables and sump cleanout may typically be done during any season of the year - before and after rainy season Floatables and sump cleanout should occur as soon as possible following a contaminated spill in the contributing drainage area Recommended Equipment Safety Equipment (traffic cones, etc) Crow bar to remove grate or lid Pole with skimmer or net (if only floatables are being removed) Sediment probe (such as a Sludge-Judge ) Vactor truck (flexible hose preferred) Pressure nozzle attachment or other screen-cleaning device Hydro International Up-Flo Filter Maintenance Log The access port located at the top of the manhole provides unobstructed access for a vactor hose and/or skimmer pole to be lowered to the base of the sump. Fig.7 Sediment is removed from the sump with a vactor hose. Man entry is not required for this step.

68 Page 10 Maintenance Procedures Not Requiring Man Entry: Floatables, Oil and Sediment Clean Out 1. Set up any necessary safety equipment (such as traffic cones) around the access of the Up-Flo Filter. Safety equipment should notify passing pedestrian and road traffic that work is being done. 2. Remove the grate or lid to the manhole or vault. 3. Without entering the vessel, look down into the chamber to inspect the inside. Make note of any irregularities. 4. If the standing water level in the sump is above the base of the Filter Modules (see Fig.8), tug the Pull Chain(s) to release the Drain Down Filter plug(s). Allow the excess water to drain out of the chamber. 5. Use the skimmer pole to fit the Drain Down Filter plug back into the open port. 6. Once all floatables and oil have been removed, drop the vactor hose to the base of the sump. Vactor out the sediment and gross debris from the sump floor. Up to 0.3 yd 3 (0.2 m 3 ) of sediment and 360 gallons (1,363 L) of water will be removed from a typical manhole Up-Flo Filter during this process. 7. Retract the vactor hose from the vessel. 8. Inspect the Angled Screens for blockages and 7 ragging. If present, remove the obstruction or ragging materials from the surface using a hose or other screen-cleaning device. Up-Flo Filter Operation and Maintenance Manual Maintenance Activities Requiring Man Entry These activities include replacement of the Media Packs and Drain Down Filter. Unless the Up-Flo Filter has been installed as a very shallow unit, it is necessary to have an OSHA-confined space entry trained person enter the vessel to replace Media Packs. The access port located at the top of the manhole or vault provides access to the Up-Flo vessel for maintenance personnel to enter the vessel and remove and replace Media Packs. The same access would be used for maintenance personnel working from the surface to net or skim debris and floatables or to vactor out sediment, oil, and water. Unless the Up-Flo Filter has been installed in a very shallow configuration, it is necessary to have personnel with OSHA Confined Space Entry training performing the maintenance that occurs inside the vessel. Scheduling Call Hydro International to order replacement Media Packs and Drain Down Filter prior to scheduling maintenance. Because Media Pack replacement requires entry into the Up-Flo chamber, maintenance events should be scheduled during dry weather. Media Pack replacement should occur immediately after a contaminated spill in the contributing drainage area. 9. On the Maintenance Log provided by Hydro International, record the date, unit location, estimated volume of floatables, oils, and gross debris removed, and the depth of sediment measured. Note any apparent irregularities such as damaged components or blockages. 10. Securely replace the grate or lid. Remove safety equipment. 11. Dispose of sediment and gross debris following local regulations. 12. Dispose of oil and sump water at a licensed water treatment facility or following local regulations. 13. Contact Hydro International at (800) to discuss any irregularities noted during cleanout. Fig.8 Cutaway view of the Filter Module Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

69 Page 11 Up-Flo Filter Operation and Maintenance Manual Recommended Equipment Safety Equipment (traffic cones, etc.) Crow bar to remove grate or lid Pole with skimmer or net (if floatables removal is not to be done with vactor hose) Sediment probe (such as a Sludge-Judge ) Vactor truck (flexible hose preferred) OSHA Confined Space Entry Equipment Up-Flo Filter Replacement Media Packs (available from Hydro International) Hydro International Up-Flo Filter Maintenance Log Screwdriver (flat head) Replacement Drain Down Filter components supplied by Hydro International Maintenance Procedures Requiring Man Entry: Media Pack and Drain Down Filter Replacement Procedures 1. Follow Floatables and Sump Cleanout Procedures, Following OSHA Confined Space Entry procedures, enter the Up-Flo Filter Chamber. 3. Open the Filter Module by turning the three cam latches on the front and sides of the module. Remove the lid 1 to gain access to the Media Pack (Fig.9). 4. Remove and discard the spent Media Pack. The Media Pack contents include: A top layer of green 2 Flow Distributing Media. Two (2) Media Bags 3 equipped with nylon handles. A bottom layer of green 2 Flow Distributing Media. 5. Insert a new Media Pack, supplied by Hydro International. First, insert a bottom layer of green Flow Distributing Media. Be sure that the media sits snugly and level at the bottom of the Filter Module. Next, insert the first of two (2) replacement Media Bags. Smooth the bag out with your hands to make sure that the bag extends snugly to the walls and corners of the Filter Module. Insert the second Media Bag, following the same procedure Filter Module Cover and Media Restraint 2. Flow Distributing Media 3. Filter Media Bags 4. Replaceable Media Pack 5. Cam Latch Conveyance Channel 7. Filter Module Support Bracket / Angled Screen Fig.9 The Filter Module houses the Media Restraint and the Media Pack.

70 Page 12 Up-Flo Filter Operation and Maintenance Manual Insert the top layer of green Flow Distributing Media. Be sure that the piece fits snugly against the walls and corners of the Filter Module. Put the lid on and secure the three latches. Check to make sure that the latches are closed properly Drain Down Filter 2. Drain Down Plug 3. Pull Chain for Drain Down 6. Use a screwdriver to unscrew the Drain Down Filter from the face of the Outlet Module (see Fig.10). DO NOT DISCARD THIS PIECE. 7. Install new Drain Down Filter supplied by Hydro International. 8. Exit the Up-Flo Filter chamber and securely replace the grate or lid. 9. On the Maintenance Log provided by Hydro International, record the date, unit location, estimated volume of floatables, oil and gross debris removed, and the depth of sediment measured. Note the number of Media Packs replaced. Note any irregularities such as damaged components or blockages. 1 Fig.10 The Drain Down Filter. 10. Remove safety equipment. 11. Dispose of spent media packs at your local landfill, following local regulations. 12. Return the spent Drain Down Filter to Hydro International. 13. Contact Hydro International to discuss any irregularities noted during annual maintenance. Solids Disposal Sediment, floatables, gross debris, and spent Media Bags can generally be disposed of at the local landfill in accordance with local regulations. The toxicity of the residues captured will depend on the activities in the contributing drainage area, and testing of the residues may be required if they are considered potentially hazardous. Sump water can generally be disposed of at a licensed water treatment facility but the local sewer authority should be contacted for permission prior to discharging the liquid. Significant accumulations of oil removed separately from sump water should be transported to a licensed hazardous waste treatment facility for treatment or disposal. In all cases, local regulators should be contacted about disposal requirements. Maintenance at a Glance Activity Inspection Frequency - Regularly during first year of installation - Every 6 months after the first year of installation Floatables/Oils Removal Sediment Removal Media Pack Replacement Drain Down Filter Replacement - Twice per year or as needed - Following a contaminated spill in the drainage area - Every six to 12 months, depending on the Up-Flo Filter Configuration - The maximum allowable sediment depth in any Up-Flo Filter configuration is 16 inches (41 cm) - Following a contaminated spill in the drainage area - Once per year - Replacement is required anytime inspection reveals that the high-water level indicator has been activated after two consecutive storms and the subsequent weighing of the Media Bags shows a wet weight greater than 40 lbs - Following a contaminated spill in the drainage area - Once per year with Media Pack replacement - Replacement is required anytime inspection reveals that the water level inside the vessel has not reached a level equal with the base of the Filter Modules approximately 36 hours after a 1-inch (2.5 cm) rainfall - As needed, in the event of continuous base flow conditions Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

71 Page 13 Up-Flo Filter Operation and Maintenance Manual Up-Flo Filter Installation Log Site Reference Name or Number for this Up-Flo Filter Location: Site Name: Site Location: Owner: site Contractor: Contact Name: Contact Name: Company Name: Company Name: Address: Address: Telephone: Fax: Telephone: Fax: Installation Date: / / Configuration (circle one): manhole vault SYSTEM Total number of up-flo filter Modules: Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

72 Page 14 Up-Flo Filter Operation and Maintenance Manual Up-Flo Filter Inspection Log Site Name: Owner Change since last inspection? Y N Location: Owner Name: Address: Phone Number: Site Status: Date: Time: Site conditions*: *(Stable, Under Construction, Needing Maintenance, etc.) Inspection Frequency Key: A=annual; M=monthly; S=after major storms Inspection Items Inspection Frequency Inspected? (Yes/No) Maintenance Needed? (Yes/No) Comments/Description Debris Removal Adjacent area free of debris? Inlets and Outlets free of debris? Facility (internally) free of debris? Vegetation M M M Surrounding area fully stabilized? (no evidence of eroding material into Up-Flo Filter) A Grass mowed? Water retention where required Water holding chamber(s) at normal pool? Evidence of erosion? Sediment Deposition Filtration Chamber free of sediments? Sedimentation sump not more than 50% full? Structural Components Any evidence of structural deterioration? Grates in good condition? Spalling or cracking of structural parts? Outlet/Overflow Spillway Other Noticeable odors? Any evidence of filter(s) clogging? Evidence of flow bypassing facility? M A A A A A A A A A M A Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web: Inspection Log Page 1 of 2

73 Page 15 Up-Flo Filter Operation and Maintenance Manual Inspector Comments: Overall Condition of Up-Flo Filter**: Acceptable Unacceptable ** Acceptable would mean properly functioning; unacceptable would mean damaged or required further maintenance. If any of the above Inspection Items are checked Yes for Maintenance Needed, list Maintenance actions and their completion dates below or on the Maintenance Log provided on page 15 of the Up-Flo Filter Operation & Maintenance Manual: Maintenance Action Needed Due Date The next routine inspection is schedule for approximately: (date) Inspected by: (signature) Inspected by: (printed) Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web: Inspection Log Page 2 of 2

74 Page 16 Up-Flo Filter Operation and Maintenance Manual Up-Flo Filter Maintenance Log Site Name: Owner Change since last inspection? Y N Location: Owner Name: Address: Phone Number: Site Status: Date: Time: Site conditions: *(Stable, Under Construction, Needing Maintenance, etc.) Estimated volume of oil/floatable trash removed: Sediment depth measured in sump prior to removal: Number of Filter Modules fitted with new media packs: Inspector Comments: Overall Condition of Up-Flo Filter: Acceptable Unacceptable ** Acceptable would mean properly functioning; unacceptable would mean damaged or required further maintenance. Maintained by: (signature) Maintained by: (printed) Hydro International (Stormwater), 94 Hutchins Drive, Portland ME Tel: (207) Fax: (207) Web:

75 Page 17 Up-Flo Filter Operation & Maintenance Manual Hydro International Certification Program for Stormwater BMP Maintenance Providers The Hydro International Stormwater BMP Maintenance Certification verifies that a stormwater BMP maintenance provider has been trained on the proper inspection and maintenance procedures for Hydro International s manufactured stormwater treatment products. Maintenance providers who complete this complimentary web-based program become a Hydro International Preferred Stormwater BMP Maintenance Partner. Become a Hydro International certified Stormwater BMP maintenance provider today. Learn more at Stormwater Solutions 94 Hutchins Drive Portland, ME Tel: (207) Fax: (207) stormwaterinquiry@hydro-int.com Turning Water Around... UFF_OMM_C1304