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# Memorandum Date: December 22 , 2011 Subject: S ummary of the Cleveland Municipal Airport continuous monitoring of DMR and sediment control u sing Passive Treatment Systems

- Phase II From: Melissa Bouatene, ORISE Fellow

- EPA HQ To: The Record This memorandum summarizes the monito ring of discharges resulting from stormwater fl ows on the Cleveland Municipal A irport construction site i n Cleveland, TN. EPA conducted a site visit of this project on November 22, 2011. The construction project has bee n going on for over two years now (started in 2009 with Phase I). During Phase II that started early November 2010 and ended in October 2011, all major earth moving operations were completed. Top soil was applied and seeded on the runway, taxi way and build ing pads, so that there would be vegetati ve cover during the down period . According to Dr. Richard Urban, Environmental Field Office Manager at the Tennessee Division of Water Pollution Control , there will be several mo nths of delays before Phase III begi n s (projected April

- May 2012). Phase III will be the last phase of this construction and during this phase, the taxiway and runway will be completed. The first part of this memorandum explains the phases that this project site has und ergone so far. The sec ond part gives background information and explains the monitoring data from Phase II of the construction including the sampling techniques used to monitor turbidity measurements of stormwater samples. The third part analyzes wastewater management and treat ments used around sediment basins and outfalls with specific details on PTS and method of application. I. Project Details

Phase I comprised primarily of environmental compliance commitments such as redirecting part of Tasso Road, relocating 2,283 feet of Little Chatata Creek, and mitigating loss of 10.47 acres of wetlands. Phase II consisted of valley filling; unclassified excavation of 2,200,000 cubic yards with erosion control, grading and storm drain piping; the relocation of approximately 290 linear f

eet of an unnamed tributary to Little Chatata Creek ; and the construction of a 5

- foot by 5

- f oot, 806

- foot long box culvert ( Cleveland Daily Banner

The Cleveland Airport construction site is 340 acres of land including 26 5.9 disturbed areas comprised of distinct areas, referred to as sites, each with its own outfall and monitoring r equirements to monitor effluent from sediment basins discharges. Runoffs from undisturbed areas of the site are referred to as natural stormwat er discharges and are treated with perimeter and internal BMPs only. ). In addition, during Phase II, the site implemented P assive T reatment Systems (PTS) of sediment basins disch arges using polymer, PAM (Polyacrylamide in floc log s) , and the installation of rock baffles . Please refer to Figure 1 on Page 5 for a diagram of the polymer’s open ditch placement.

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# II. Background and Analytical Data The sediment basins used on the construction site are designed for a 10 year storm. So far, no particular storm has been greater than the design capacity of the basins. The permit also requires the construction site operator to conduct in

- stream monitoring (upstream and downstream) from the construction site. The permit doe s not include a turbidity limit; therefore , the effec tiveness of the controls on

- site is calculated by evaluating the difference ( ∆ NTU) between upstream turbidity and downstream turbidity. Whenever the downstream turbidity is similar or less than the turbidity of the upstream flow, an assumption is made that there were no significant disch arge s of sediments from the construction project to the receiving water. The early part of the construction (Phase I) was during very dry period (October 2009

- end of October 2010) with only one rain in July 2010. Therefore, no discharge data was recorded except data for July 2010. Part of Phase II also occurred during a dry period; i t only started raining in early March 2011. The turbidity data is presented in the attached document: Attachment 1 - Summary of Analytical Data . That document presents data for t he in

- stream samples (LCD

- Little Chatata Creek Downstream and LCU

- Little Chatata Creek Upstream ) and SW

- Stormwater outfalls. The numbers following after the “SW” on Attachment 1 represent numbers attributed to different locations of the outfalls. The Jul y 2010 data from Phase I records a turbidity of 450 NTU from SW 3. During Phase II starting around 10/29/2010, discharge sample tak en at that same location (SW 3) reads 98 NTU. Attachment 2 presents the minimums and maximums measured in the discharges duri ng construction. It also discusses the relationship between the use and no use of PTS on stormwater flows and the turbidity results from those discharges. Three techniques based on drainage locations are used to monitor turbidity from stormwater flows thr oughout the site . **•** Manta2 Multi

- probes sensors with turbidity and depth sensors ( Attachment 7: Fig. 3a

- 3c ) are used to monitor t he LCD and LCU locations . This instrument can run unattended and is equipped with batteries that last for up to two weeks. The sensors a re placed inside the streams and automatically collect turbidity and depth measurements, each hour , which are stored internally. A technician is sent to the field once per week to download the data onto a laptop computer. The cost for the M anta2 sensors and the batteries are ~$4,500 and ~$600 respectively. **•** An ISCO 6712 portable sampler (Attachment 7: Fig. 3f & 4a) is used t o monito r the discharging stormwater outfalls of 50 acres or more, like S W 6 and SW 5. The ISCO sampler is a programmab le liquid sampler that is capable of operating in heavy storms without additional protection. The sample tube is placed inside the sediment basins discharge pipe, and a flow meter is used to measure the velocity and depth in the sediment basin discharge pipe once every 15 minutes. If flow is detected, the sampler will collect one sample per hour as long as flow is present. If no flow is present, then the sampler does not collect a sample. Sample is col lected through a peristaltic pump, located aside the controller case, that pulls in the samples and purges the sample line. The sample is fed from the pump down to a filling arm beneath the control case. The filling arm rotates above the bottle case and ca n fill up to 24 bottles of 1000 mL sample. The velocity and depth measurements are stored internally and can either be read from an external display located on the sampler or can be downloaded onto a computer. The renting price for the ISCO unit is ~$750/ month. This equipment has remained on

- site throughout the construction period.

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# • A grab sampling procedure is used f or the outfalls draining less than 50 acres . With this procedure, samples are only collected when a discharge is p resent, as these outfalls h ave not discharged very often during construction. Only approximately 25 samples have been collected from outfalls draining less than 50 acres. The outfalls draining less than 7 acres, like outfalls 7, 8, 8A, and 2 for example, were stabilized at the end of Phase I, and the sediment basins around those outfalls were removed. Discharges from these outfalls rarely occur as well. The water leaving those outfall points are considered non - disturbed/natural s tormwaters (no disturbance from site activities affected the nature of the water). Upon being collected, the samples are immediately placed in coolers and shipped to the laboratory for analysis. The turbidity analysis is performed within 72 hrs of sample collection; the TSS analysis, within 7 days. While samples are being collected for turbidity analysis, samples are also collected for TSS analysis in a separate container. T he laboratory requires at least 250 mL of sample to run the turbidity analysis and at least 1000 mL to run the total suspended solids analysis . 

# III. Treatment and Wastewater Management Stormwater samples flow through a series of BMPs and Passive Chemical Treatments before reaching sediment basins and outfalls and discharging to the Little Chatata Creek. Attachment 4 connects o utfalls with their respective sediment basins with outfalls’ location an d acreage summary. Attachment 6 summarizes the BMPs and/or PTS used around each outfall. The PTS used on the Airport construction site consisted of 80 p olymer floc

- log blocks (type 706B) and p olymer powder treated jute mesh placed in constructed treatment ditches throughout the site which ultimately lead to s ediment basins. The floc logs are made out of soil specific t ailored log

blocks containing blends of water treatment components and P AM co

- polymer that are responsible for improving water clarification and erosion control. (Buttrey , T . (2011 , October 10) ). The floc logs are soluble in water and upon being dissolved, expand in linear molecular forms that reduce and prevent fine suspended particles including colloidal clays , from remaining in suspension in stormwater . Water clarification happens when the negatively charged ions present in the floc log polymers interact with anything that is positively charged in the turbid water and neutralizes it. As the negatively charged ions present in the polymers att ract positively charged ions, they can also attract the negatively charged ions that are present in colloidal

- sized particles present in turbid water. The negatively charged ions in polymers will attract the negatively charged ions through positively charg ed compounds (cations) such as calcium, potassium, ammonium, magnesium, which are present in adequate amount in most soils. The more cations present in a soil, the better the reaction between the polymer and the turbid water is. Polymer floc logs are desig ned for a base flow rate of 60

– 75 GPM (Gallons Per Minute) and dose between 2

- 3.5 PPM based on the surface chemistry of the device. A flow rate exceeding 75 GPM will be reduced after the water flows through silt fences, which will reduce the flow’s veloc ity, prior to reaching the treatment ditches. Because the surface chemistry of the device is directly proportional to the flow of the stormwater , it helps in preventing over dosage of polymer in water . As the stormwater ’ s flow increases, the dosage increas es , and as the flow decreases, the dosage decreases as well. There is no chemical dosage for a stagnant flow.

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# Stormwater treatment happens in an open ditch placement (Figure 1 below). The turbid water flows toward the different treatment ditches through diversion berms and grading on the site. The ditch is created, either by digging out the bed or building up the walls, and lined with plastic or geo - synthetic fabric to prevent erosion. The exposed soil is covered with jute matting, and Silt Stop powder is applied to prevent erosion. Floc Logs , specific to the type of soil, are placed in series 50

- 60 ft apart from one another and secured along the ditch through ropes tied off to wooden st icks placed inside the ground. Check dams are placed in between the floc logs, (2 floc logs per check dams), to force the water to flow over and around them in order to increase turbulence and mixing with th e f loc l ogs. This placement allows the water to m ix with the site

specific polymer blends and react with the suspended sediment. The ditch is lined with jute or similar matting to provide surface area for the flocculated sediment to adhere to and help remove fine particulate from the water. Using the wro ng form of PAM on a soil will result in som e degree of performance failure and increase the potential for this material to enter surface waters. Treatment Process Description

The floc logs have a light blue color when brand new and remain viable for up to 180 days. Overtime, the light blue color fades from the turbid water’s dirt being collected on them. A visual inspection is done frequently by engineers on site to scrap off the dirt over the blocks or replace them if needed ( Polymer Enhanced BMP Application Guide ).

Figure 1

- Di agram of Floc Log Treatment (Applied Polymer Systems, Inc.)

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# References Applied Polymer Systems, Inc. “ Polymer Enhanced Best Management Practice (PEBMP) Application Guide”. Woodstock: Georgia, 2002 LaBreche, Timothy and Williams, Chris. “ISCO Automated Sampler, Environmental Sampling & Monitoring Primer”. Vermont, 1997. Web. 25 October 2011. McLaughlin, R.A., Hayes, S.A., and Bartholomew, N., “Innovations (Old and New) for Improving Erosion, Sediment, and Turbidity Control”, 2003 International Erosion Control Association Meeting, Las Vegas, NV. Polymer Enhanced BMP Application Guide, “Stormwater treatment: Dewatering/ Treatment Ditches.” Accessed November 16, 2011 . http://www.siltstop.com/al tbmpguide/closedloop/WT.pdf . Cleveland Daily Banner, “Airport construction hits second gear Phase II bids to be open by end of month.” http://www.clevelandbanner.com/view/full_story/8998084/article

- Airport

- construction

- hits

second

- gear - Phase

- II

- bids

- to - be

- open - by

- end

- of

- month?instan ce=latest_articles#ixzz1W3B09f4N . Accessed November 25, 2011. 

# Acknowledgements Dr. Richard Urban Environmental Field Office Manager Tennessee Division of Water Pollution Control Troy Buttrey, PE TN, KY PDC Consultants, LLC Brent Wood, P.E. Staff Engineer S&ME, Inc. Steve Iwinski Environmental Scientist Applied Polymer Systems, Inc. Northern R&D Lab

# Attachment 1 - Summary of Analytical DataSummary of Analytical Data September 2011 Cleveland Municipal Airport S&ME Project No. 1437-06-639A NPDES Permit No. TN0080934 Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS Turbidity TSS (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) (NTU) (mg/l) 10/29/09 3.9 2.6 --- --- --- --- --- --- 4.9 2.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- pre-construction 05/07/10 4.1 2.8 --- --- --- --- --- --- 4.3 3.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/13/10 2.6 2.5 --- --- --- --- --- --- 4.2 4.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/20/10 2.6 2.8 --- --- --- --- 2.6 4.2 3.1 2.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/26/10 2.3 2.1 --- --- --- --- 0.74 4.6 0.95 2.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/04/10 4.4 1.9 --- --- --- --- 4.2 4.5 5.9 3.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/10/10 6.6 3.1 --- --- --- --- 5.2 3.1 6.2 6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/18/10 5.5 3.5 --- --- --- --- 5.4 4.8 5.3 4.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/25/10 3.3 2.5 --- --- 5.7 13 6.5 8.4 4.7 3.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/25/10 --- 2.5 --- --- --- 4.4 --- 8.2 --- 3.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 07/02/10 3.0 2.0 --- --- 4.4 5.1 7.6 8.1 4.2 2.7 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/02/10 3.7 1.9 --- --- 8.5 7.5 7.6 9.3 4.3 3.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 07/08/10 2.3 2.4 --- --- 110 82 7.9 14 3.7 3.1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/13/10 --- --- --- --- --- --- --- --- --- --- --- --- --- --- 450 230 --- --- --- --- --- --- --- --- storm sample 07/16/10 4.6 4.8 --- --- 8.2 24 1.2 5.2 3.1 4.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/23/10 4.9 3.6 --- --- 3.3 3.9 3.8 3.5 4 5.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/30/10 4.1 2.6 --- --- 5.4 4.4 4.7 5 7 4.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/30/10 4.4 2.2 --- --- 5.7 5 4.5 4.1 5.8 4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 08/05/10 1.2 1.9 --- --- 5.7 5.3 3.6 3.7 1.7 3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/13/10 3.8 <1.0 --- --- 4.2 5.1 5.5 4.3 3.7 2.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/17/10 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- storm sample 08/20/10 3.7 2.4 --- --- 10 9.5 3.3 2.5 5 4.1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/27/10 1.5 <1.0 --- --- 2.6 4.4 2.1 3 1.6 2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/27/10 --- <1.0 --- --- --- 5.6 --- 3 --- 2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 09/03/10 3.4 1.0 --- --- 6.5 6.1 5 3.4 3 2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/10/10 1.6 1.1 --- --- 11 14 3.6 3.4 2.8 1.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/17/10 2.0 <1.0 --- --- 16 15 4.7 3.5 2.9 1.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/21/10 1.8 <1.0 --- --- 31 28 4.3 3.6 2.3 1.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 10/01/10 3.0 1.1 --- --- 9.6 34 5.3 3.8 3.2 1.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 10/08/10 2.1 <1.0 --- --- 15 33 6.2 3.6 2.2 1.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 10/15/10 2.6 1.0 --- --- 27 58 9.4 4.6 2.8 1.1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 10/22/10 2.4 1.4 --- --- 28 26 4.3 1.5 2.2 1.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 10/29/10 3.1 <1.0 --- --- 8.9 6.5 6.2 2.8 5.7 1.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 10/29/10 --- <1.0 --- --- --- 6.9 --- 2.5 --- 1.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 11/05/10 4.1 1.2 --- --- 4.6 4.8 9.3 5.1 2.9 2.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 11/12/10 2.4 2.0 --- --- 5.8 10 4.8 3.6 1.9 1.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 11/19/10 2.9 1.5 --- --- 16 21 4.4 2.9 4.9 1.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 11/22/10 1.5 1.2 --- --- 12 17 3.3 2.6 2.4 1.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 11/22/10 --- 1.1 --- --- --- 16 --- 2.8 --- 1.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 12/03/10 16.0 5.3 --- --- 35 14 4.1 2.3 17 6.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 12/10/10 2.5 1.2 --- --- 3.1 6.2 --- --- 3.4 1.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 12/15/10 3.3 1.4 --- --- 5 5 --- --- 2.9 1.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 12/22/10 5.7 <1.0 --- --- 3.6 3.2 --- --- 2.6 1.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 12/29/10 1.6 1.1 --- --- 3 3.2 2.7 1.1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 01/07/11 8.2 2.9 --- --- --- --- --- --- 10 2.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 01/14/11 2.5 1.5 --- --- --- --- --- --- 2.6 1.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 01/21/11 5.1 1.9 --- --- --- --- --- --- 6.8 2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 01/28/11 4.9 1.8 --- --- --- --- --- --- 6.9 2.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 02/04/11 5.2 2.4 --- --- --- --- --- --- 5.5 2.1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 02/10/11 1.8 1.1 --- --- --- --- --- --- 2.9 1.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 02/18/11 1.6 1.9 --- --- --- --- --- --- 2 2.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 02/25/11 4.2 4.2 --- --- --- --- --- --- 15 12 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 03/04/11 4.5 2.8 --- --- --- --- --- --- 6.8 5.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 03/09/11 --- --- --- --- --- --- --- --- --- --- --- --- 100 27 98 35 --- --- 88 30 190 81 270 230 storm sample 03/10/11 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 32 11 110 14 120 61 storm sample 03/11/11 21.0 9.5 --- --- --- --- --- --- 20 8.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 03/15/11 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 96 29 96 14 --- --- storm sample 03/18/11 6.5 3.2 --- --- --- --- --- --- 8.7 7 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 03/18/11 6.4 3.1 --- --- --- --- --- --- 9.3 6.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 03/25/11 3.8 4.1 --- --- --- --- --- --- 4.3 3.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 03/25/11 3.7 4.1 --- --- --- --- --- --- 5 3.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 03/28/11 --- --- --- --- --- --- --- --- --- --- 190 250 --- --- --- --- --- --- 120 31 79 16 --- --- storm sample 04/01/11 6.7 3.9 --- --- --- --- --- --- 6.7 5.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 04/05/11 --- --- --- --- --- --- --- --- --- --- 340 180 --- --- --- --- --- --- --- --- --- --- --- --- storm sample 04/08/11 7.9 3.9 --- --- --- --- --- --- 6.7 4.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 04/15/11 2.4 1.8 --- --- --- --- --- --- 4.1 3.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 04/16/11 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 88 44 23 12 120 32 280 390 storm sample 04/20/11 24.0 28.0 --- --- --- --- --- --- 28 34 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 04/29/11 16.0 6.6 --- --- --- --- --- --- 13 6.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 04/29/11 15.0 6.8 --- --- --- --- --- --- 14 6.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 05/04/11 --- --- --- --- --- --- --- --- --- --- 27 7.2 --- --- --- --- --- --- --- --- --- --- --- --- storm sample 05/06/11 5.0 3.1 --- --- --- --- --- --- 7.2 5.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/12/11 1.6 1.9 --- --- --- --- --- --- 3.2 4.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/18/11 1.9 1.9 --- --- --- --- --- --- 3.4 2.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/27/11 3.2 1.2 --- --- --- --- --- --- 7.4 4.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 05/27/11 2.2 1.8 --- --- --- --- --- --- 6.5 4.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 06/03/11 1.2 1.1 --- --- --- --- --- --- 4.1 3.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/09/11 1.1 1.4 --- --- --- --- --- --- 2.9 3.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/16/11 6.9 3.4 --- --- --- --- --- --- 11.0 7.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 06/21/11 2.2 2.8 --- --- --- --- --- --- 4.3 1.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/01/11 2.3 3.4 --- --- --- --- --- --- 3.5 2.8 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/08/11 2.2 2.2 --- --- --- --- --- --- 3.7 3.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/15/11 49.0 32.0 --- --- --- --- --- --- 54.0 34.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/15/11 --- 32.0 --- --- --- --- --- --- --- 35.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 07/22/11 1.8 3.8 --- --- --- --- --- --- 1.9 3.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 07/29/11 3.7 3.8 --- --- --- --- --- --- 2.9 2.2 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/02/11 3.0 2.9 --- --- --- --- --- --- 3.6 2.4 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/12/11 3.9 3.4 --- --- --- --- --- --- 4.2 2.6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/19/11 2.1 1.1 --- --- --- --- --- --- 2.5 3.1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 08/26/11 3.8 4.5 --- --- --- --- --- --- 2.2 2.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/02/11 1.4 2.0 --- --- --- --- --- --- 1.4 1.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/02/11 --- 3.3 --- --- --- --- --- --- --- 1.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 09/12/11 3.8 2.9 --- --- --- --- --- --- 4.8 4.7 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/16/11 2.1 <1.0 --- --- --- --- --- --- 4.9 3.9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/16/11 --- <1.0 --- --- --- --- --- --- --- 4.3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- duplicate sample 09/16/11 --- --- --- --- --- --- --- --- --- --- 12 4.6 --- --- --- --- --- --- --- --- --- --- --- --- storm sample 09/23/11 70.0 34.0 --- --- --- --- --- --- 61.0 29.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate 09/23/11 --- --- 320 170 --- --- --- --- --- --- 170 100 --- --- --- --- 210 78 --- --- --- --- --- --- storm sample 09/27/11 --- --- 44 7.5 --- --- --- --- --- --- 13 4.6 --- --- --- --- --- --- --- --- --- --- --- --- storm sample 09/30/11 2.3 1.9 --- --- --- --- --- --- 3.1 2.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- weekly duplicate Sept Avg 15.9 8.8 182.0 88.8 --- --- --- --- 15.0 6.7 65.0 36.4 --- --- --- --- 210.0 78.0 --- --- --- --- --- --- Sept Max 70.0 34.0 320.0 170.0 --- --- --- --- 61.0 29.0 170.0 100.0 --- --- --- --- 210.0 78.0 --- --- --- --- --- --- SW-11 LCU Notes: SW-3 SW-8A SW-1 SW-2 SW-5 LCD Sample Date SW-6 RRU Unnamed Tributary (SW-6A) SW-8

# Attachment 2 - Minimum and Maximum turbidity measures during phase II of the construction.

# Phase II - Cleveland Airport construction: Turbidity Max & Min

Discharge # LCD SW 1 SW 2 SW 3 SW 4 SW 5 SW 6 SW 7 SW 8 SW 8A Comments Turbidity Highs/Lows

High: 70 ; Low: 1.1 High: 340 ; Low: 12 High: 100 ; Low: ND High: 450 ; Low: 98 High: ND ; Low: ND High: 210 ; Low: 88 High: 320 ; Low: 35 High: ND ; Low: ND High: 120 ; Low: 23 High: 190 ; Low: 79 SW 9 SW 10 No Discharge: Sediment basin closed resulting in closed Outfall 7 Sediment basin closed ; no PTS used, no sediment basin

SW 11 High: ND ; Low: ND Phase I(relocation of Tasso road). No land disturbed, chance of having offside flow was small so No Discharge High: ND ; Low: ND Treatment wasn’t in place when rain first started resulting in color contrast in water and high turbidity # of meas. reported: 6; 03/28/2011

- 09/27/2011 # of meas. reported: 52; 10/29/2010

- 09/30/2011

# of meas. reported: 1; On 03/09/2011; no PTS, no sed. basin # of meas. reported: 2; On 07/13/2010 & 03/09/2011. 450 NTU was obtained during Phase 1 (no PTS installed yet) # of meas. reported: 2; On 04/16/11 & 09/23/11; PTS installed No treatment was applied to water flow from sediment basin 4 Treatment applied to water flor from sediment basin 2 # of meas. reported: 5; 11/2010

- 09/2011 During Phase I (relocation of Tasso road); no PTS used, no basin; # of meas. reported: 5; 03/09/2011

- 04/16/2011 High: 280 ; Low: 120 PTS installed and used; # of meas. reported: 3; 03/09/11

- 04/16/11

No Discharge LCU High: 61 ; Low: 1.4 # of meas. reported: 52; 10/29/2010

- 09/30/2011

# Attachment 3 - Overall Erosion Control Plan (Final Stage) of the Cleveland Municipal Airport Construction Site. Ple ase refer to this map to see a representation of sediment basins locations relative to outfalls and sites locations.

# Attachment 4

- Location of Outfalls & Acreage Summary on site Attachment 4 identifies the location of each outfall and summarizes the number of acr es for Phase II of the construction site. (e.g: SW 3 → Sediment Basin 1 → Site 2: Outfall 3).

# Location of Outfalls & Acreage Summary Outfalls SW Outfall: Sediment Basin Number Acres of land Outfall 1 SW1: 6 21.7 Downstream of sed. basin 6 approximately 250' upstream from LCD Outfall 2 SW2: No Basin 1.8 Culvert under Michigan Avenue Outfall 3 SW3: 1 32 Culvert under Michigan Avenue Outfall 4 SW4: No Basin 4.7 Culvert under Michigan Avenue No Outfall Sediment Basin 5 23.7 Sed. Basin 5; approximately 4,200' upstream from SW5 Outfall 6A SW6A: 2&4 67.6 Approximately 950' upstream from confluence Outfall 6 SW6: 2 30 Downstream of sed. basin 2; just upstream of SW
- 6A; V alley Filling area Outfall 7 SW7: No Basin 5 Outfall 8 SW8: No Basin 5.8
Outfall 10 SW10: 7 14.5 Stabilized at end of Ph 2; sed. basin removed, 3.7ac drains to out fall 

# Outfall Location/Description

Outfall 8A SW8A: No Basin Outfall 9 SW9: 5A
Outfall 11 SW11: 8 18 Stabilized at end of Ph 2; sed. basin removed, 2.5ac drai ns to outfall Outfall 5 SW5: 3 88

1.8 10 Downstream of sed. basin 3, approximately 750‘ upstream from LCD

Stabilized at end of Ph 1; sed. basin removed Stabilized at end of Ph 1; sed. basin removed Culvert under Dry Valley Road Roadside ditch draining south along Dry Valley Road

LCD 266.5 Downstream in - stream monitoring of Little Chatata Creek No Outfall No Outfall LCU na Upstream in - stream monitoring of Little Chatata Creek

# Attachment 5 - Drawing of sediment basins discharging to specifi c outfalls or culverts based on Attachment 3. Note: not all outfalls have sediments basins. E.g: O utfalls 7 and 8 were closed because the ir sediment basins were removed .

# Sediment Basin 6

LCU Outfall 1

Little Chatata Creek Outfall 2: Site 6

Road side ditch

Culvert under Michigan Avenue 

# Outfall 3: Site 2

Sediment

Basin 1

Outfall 4: near Michigan Avenue

Outfall 5: near construction exit Sediment

Basin 3 Outfall 6: near Valley Filling Area Sediment

Basin 2

Unnamed Tributary

LCD Under Dry Valley Road Outfall 11 Sediment

Basin 8 Sediment Basin 5A Sedimen Basin 7 Outfall 9: near Tasso Road Phase I Outfall 10: Site 4
Outfall 8 Outfall 8A: near Tasso Rd Phase I

# A ttachment 6 - PTS & BMPs used around outfalls.

# CLEVELAND AIRPORT PHASE II: Treatmen t T rain of BMPs for each Outfall. OUTFALL 1 (SW - 1):  Undisturbed stream buffer (Little Chatata Creek)  Temp . double silt fence w/ wire backing and straw wattles  Straw wattle filter ring below outlet of temp sediment basin #6  Rip

- Rap outlet protection  Temp . sediment basin #6 w/ faircloth skimmer outlet structure  Slopes/berms of sediment basin seeded and matted once constructed  Fill slopes terraced, and p ermanently seeded and matted as constructed  Temp . treatment ditch w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Diversion berms  Temp . slope drain with floc logs  Temporary and permanent stabilization of up

- gradie nt areas OUTFALL 2 (SW - 2): **No construction stormwater from pha se 2 (area stabil ized in phase I )  Rock filter ring/check dam at culvert under Michigan Ave  Undisturbed grassy area  Temp . silt fence w/ wire backing  No sediment basin required OU TFALL 3 (SW - 3):  Rock filter ring/ check dam at culvert under Michigan Ave nue  Undisturbed roadside ditch  Rock stabilized construction exit  Silt fence w/ wire backing and straw wattle  Rock filter ring below outlet of temp sediment basin #1  Rip

- Rap outlet protection  Temp . sediment basin #1 w/ faircloth skimmer outlet structure  Slopes/berms of sediment basin seeded and matted once constructed  Diversion berm/channel seeded and matted once constructed  Temp . treatment ditch w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Fill slopes permanently seeded and matted as constructed  Temporary and permanent stabilization of up

- gradient areas

# OUTFALL 4 (SW - 4):

 Rock filt er ring/check dam at culvert under Michigan Ave  Undisturbed grassy area/roadside ditch  Silt fence w/ wire backing and straw wattle  Diversion berm/channel seeded and matted once constructed  Temporary and permanent stabilization of up

- gradient ar eas  No sediment basin required OUTFALL BELOW LCU:  Undisturbed stream buffer (Little Chatata Creek)  Temp . double silt fence w/wire backing and straw wattles  Undisturbed grassy area/swale  Rip

- rap outlet protection  Temp . sediment basin #5 w/ faircloth skimmer outlet structure  Slopes/berms of sediment basin seeded and matted once constructed  Temp . treatment ditches w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Diversion berms/

rock check dams  Temporary and permanent stabilization of up

- gradient areas OUTFALL 5 (SW - 5):  Undisturbed stream buffer (Little Chatata Creek)  Temp . double silt fence w/ wire backing and straw wattles  Undisturbed grassy area/swale  Rip

- rap outlet protection  Temp . sediment basin #3 w/ fai rcloth skimmer outlet structure. Basin #3 is a multi cell basin  Slopes/berms of sediment basin seeded and matted once constructed  Fill slopes terraced and permanently seeded and matted as c onstructed  Diversion berms  Temp . treatment ditches w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Temporary and permanent stabilization of up

- gradient areas

# OUTFALL 6 (SW - 6)

– FOR SEDIMENT BASIN #4:

 Temp . rock check dam/berm prior to unnamed tributary  Rock/Grass lined channels  Silt fence with wire backing and straw wattles  Rip

- rap outlet protection  Temp . sediment basin #4 w/ faircloth skimmer outlet structure and a permanent pool  Slopes/be rms of sediment basin seeded and matted once constructed  Fill slopes terraced, and permanently seeded and matted as constructed  Diversion berms  Temp . slope drains with floc logs  Temporary and permanent stabilization of up

- gradient areas OUTFAL L 6 (SW - 6)

– FOR SEDIMENT BASIN #2:  Temp . rock check dam/berm prior to unnamed tributary  Roadside ditch permanently seeded and matted  Silt fence with wire backing and straw wattles  Rip

- rap outlet protection  Temp . sediment basin #2 w/ faircloth s kimmer outlet structure (SW

- 6A). Basin #2 is a multi cell basin  Slopes/berms of sediment basin seeded and matted once constructed  Fill slopes terraced, and permanently seeded and matted as constructed  Temp . tr eatment ditch w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Diversion berms  Temp . slope drains with floc logs  Temporary and permanent stabilization of up

- gradient areas OUTFALL 7 (SW - 7): **No construction stormwater from phase 2 (area stabilized in phase 1)  Sediment basin was removed at end of phase 1 OUTFALL 8 (SW - 8): **No construction stormwater from phase 2 (area stabilized in phase 1)  Temp . rock check dam at ro adside ditch at Dry Valley Road  Sediment basin was removed at end of phase 1 OUTFALL 8A (SW - 8A): **No construction stormwater from phase 2 (area stabilized in phase 1)  Temp . rock check dam at culvert under Dry Valley Road  Upstream portion of wate rshed is being diverted into temporary sediment basin #5A

# OUTFALL 9 (SW - 9):

 Temp . rock check dam at culvert under Dry Valley Road  Undisturbed roadside ditch and grass areas  Silt fence with wire backing  Rip

- rap outlet protection  Temp . sedimen t basin #5A w/ faircloth skimmer outlet structure o Sediment basin has never discharged over the course of the project  Slopes/berms of sediment basin seeded and matted once constructed  Diversion berm/channel seeded and matted once constructed  Temporary and permanent stabilization of up

- gradient areas OUTFALL 10 (SW - 10):  Undisturbed roadside ditch and grass areas  Rock stabilized construction exit  Silt fence with wire backing  Rip

- rap outlet protection  Temp . sediment basin #7 w/ fa ircloth skimmer outlet structure o Sediment basin has never discharged over the course of the project  Slopes/berms of sediment basin seeded and matted once constructed  Fill slopes permanently seeded and matted as constructed  Diversion berms/chann el  Temp . treatment ditch w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Temporary and permanent stabilization of up

- gradient areas  Sediment basin #7 was removed/ backfilled and stabilized with permanent seeding and matting during phase 2 once the contributing drainage area had been reduced to less than 5 acres and permanently seeded and matted OUTFALL 11 (SW - 11):  Rock filter ring/check dam at culvert under Dry Valley Road  Undisturbed roadside ditch and grass areas  Silt fence with wire backing, straw wattles, and straw bales  Rip

- rap outlet protection  Temp . sediment basin #8 w/ faircloth skimmer outlet struct ure  Slopes/berms of sediment basin seeded and matted once constructed  Fill slopes terraced, and permanently seeded and matted as constructed  Diversion berms/channel  Temp . treatment ditch w/ erosion control matting, check dams, polymer treated jute mesh, and floc logs  Temporary and permanent stabilization of up

- gradie nt areas  Sediment basin #8 was removed/ backfilled and stabilized with permanent seeding and matting during phase 2 once the contributing drainage area had been reduced to less than 5 acres and permanently seeded and matted

# Attachment 7

- Cleveland Airport site pictures

# Pictures from the Cleveland Airport ’s site

Fig .1 a - Cleveland Airport ’s site Fig.1b

- Cleveland Airport construction site

Fig . 1 c - Little Chatata Creek Fig . 1 d

- Little Chatata Creek

Fig. 1 e - Little Chatata Creek Fig. 1 f

- Little Chatata Creek

# Fig. 2a

- Culvert discharging to L . C hatata Creek Fig. 2b

- top soil covered with mulches

Fig. 2 c - Slope drain with berm & rip

- rap Fig. 2d

- Unnamed Tributary w/ rock check dams

Fig. 2 e - New 706B floc logs from the Airport site F ig. 2 f

- Used flog logs from a TDOT site

# Fig. 3a

- Little Chatata Downstream (LCD) Fig. 3b

- Manta2 sensor monitors LCD & LCU

Fig. 3c

- LCD with Manta 2 inside the stream Fig. 3d

- Sediment Basin 2

- multi cell basi n Turbid water on right side, clean water on left

Fig . 3 e - Sediment Basin 3

- multi cell basin Fig . 3f

- ISCO 6712 Portable Sampler Used to monitor discharges from sed. basin 3

# Fig . 4a

- ISCO sample bottle case Fig . 4b

- Sediment Basin 4

- consta nt ground

- Fills up to 24 bottles water infiltration

Fig. 4c

- Sediment Basin 4 Fig. 4d

- Sediment Basin 6

Fig. 4e

- Faircloth Skimmer inside Sediment Basin 6