Eleven Steps to a Healthy Sanitary Sewer Collection System

“An ounce of prevention is worth a pound of cure.”- Benjamin Franklin. For far too long we in Oklahoma have been ignoring our sanitary sewer systems. Just like our personal health, if we do not practice a proactive approach to maintaining our aging systems, we will encounter costly consequences to our sewer systems sooner or later. If we take measures to maintain our sewers, we can minimize costly repairs and rehabilitations. It is time to stop putting “band aids” on our sewer lines and get them in shape. Here are 11 steps to help you get started on your sanitary sewer line maintenance program.

1. Use Global Information System (GIS) mapping to understand your system. An effective sewer maintenance program revolves around knowing the location of all infrastructure, pipe sizes, length and depth of lines, types of pipe and materials used in manholes. Accurate GIS mapping can help track completed rehabilitation and replacement work, but it begins with identifying exactly where manholes and lamp holes are located.

2. Inspect manholes on a schedule. Depending on the size of your system and staff availability, this may be once a year or every other year. Inspecting manholes will alert you to issues such as excessive debris and blockages, structural issues, and inflow and infiltration sources. Keep records using manhole inspection forms to track maintenance and rehabilitation needs.

3. Perform Draw Down Tests if you have lift stations. The test verifies proper pump performance and should be conducted annually at every lift station to identify issues with floats, isolate excessive grease, and confirm check valves are functional. You might want to check the Air Relief pits to make sure the ball valves are operating efficiently while you are doing the tests.

4. Verify your municipality has an ordinance requiring grease traps at businesses. Restaurants, gas stations, car washes, and other businesses that discharge fats, oils, and grease (FOG) should install a grease trap to avoid clogging the sewer system. Perform random inspections to ensure proper installation and maintenance of grease traps.

5. Do construction observations on sanitary sewer installations for new developments. Sanitary sewers that are not properly bedded are a major problem that leads to further problems for the municipality down the road. Offset frames and covers, chimney damage, and broken pipe are just a few problems resulting from improper new construction. Make sure your sewer mains are identified prior to trenching, drilling, or boring projects to avoid conflicts with your system. Before a developer passes new infrastructure on to the municipality, make sure to perform mandrel testing on sewer mains, and vacuum tests on manholes to confirm proper construction. Also conduct a warranty inspection prior to the warranty expiration to verify whether issues with materials or workmanship have developed during the warranty period.

6. Establish a routine cleaning and jetting program on sewer mains. This process will remove debris buildup and attached deposits to ensure your system is flowing properly and capacity is not being compromised. Jetting and cleaning at least 30% of your system annually so that all lines have been cleaned on a 3-year rotational basis will save a lot of headaches down the road.

7. Perform closed circuit television (CCTV) inspections. After cleaning and jetting, conduct CCTV inspections of the sewer mains to identify leaks or defects in the pipe system.

8. Conduct sump pump inspections. These residential inspections will identify connections to the sewer system. Have an ordinance prohibiting illicit sump pump connections.

9. Perform smoke testing. Smoke testing is a quick and efficient method for detecting storm water connections, roof drain connections, or defective sewer laterals, all of which are contributors to inflow & infiltration (I&I).

10. Conduct wet weather inspections. These can provide valuable information on how precipitation and groundwater conditions affect the flow in your system. Manholes may appear in good condition when it is dry, but they may exhibit leaking joints, missing mortar, and in-flow lid leaks in low-lying areas during wet-weather inspections.

11. Prepare an Operations & Maintenance (O&M) Manual for your sanitary sewer system. An O&M Manual will contain information on your maintenance schedules, identify how to report sanitary sewer overflows, have an emergency contact list, and spell out inspection procedures which can be helpful when training new sewer staff.  It provides invaluable references for both sewer maintenance workers and administrators when it comes time to budget for repairs, rehabs, and rebuilds.

It is time to stop wasting your time “putting out fires” on all the repairs required due to past negligence.  Maintaining a sewer system takes time and commitment, but just like eating right and exercising helps keep a heart healthy, performing sanitary sewer maintenance regularly will greatly improve the health of your sewer system. And we all know preventing a problem saves time and costs less than fixing it after an SSO event happens.

Maximizing Jetter Hose Life

How long will a typical sewer line jetter hose last? That is about as easy to answer as trying to estimate when a jetter’s pump will break down.

A hose is a consumable; it’s not going to last forever. There is no hard-fast rule for how long a hose will last. Hoses are subjected to a harsh environment. Operators often don’t know what they are getting into, and can destroy a hose the first time they put it into a pipe.  On the other hand, there are some simple and relatively inexpensive things you can do to prolong the life of your hose. First and foremost – shield your hose from sharp edges on things like manhole covers, corrugated pipe or broken pipes using a protective sleeve, generally known in the industry as a tiger tail.

Every time you use a hose without a tiger tail, you run the risk of tearing the outer jacket of the hose. Once you get a nick in the outer jacket it reduces the hose’s effectiveness. Tiger tails come in various diameters and lengths. Each one includes a tie-off rope that workers attach to a fixed object near a friction point, like the edge of a broken pipe in the opening of a manhole trough. The tiger tail stays in one place while the jetter hose moves through it, unimpeded by sharp edges. Another useful tool is a manhole roller guide, which also protects the hose from sharp edges as it passes through the manhole opening. Some companies make manhole rollers for use both at street level and down inside the manhole where the hose enters the pipe at the trough.

Regularly cleaning hoses helps extend their life, so operators should wipe down a hose as it is being pulled back to the hose reel. Hoses can come into contact with damaging chemicals and waste gases. You don’t want residue from waste eating away at the hose. Having a clean hose also minimizes odors when storing in a closed space. Also, it is difficult to detect nicks and cuts on a hose that is grimy and dirty.

Another suggestion is for operators to use a leader hose, typically a 10-15 foot long rubber hose that attaches to the front end of the jetting hose at one end and the jetter nozzle at the other end. This hose is also called a sacrificial hose because it takes the brunt of the load as it goes through the pipe. Because it is rubber, a lead hose is more flexible than the thermoplastic-coated jetter hose, so it can make its way through bends in pipes easier. The leader hose is cheaper to replace than the jetter hose and you can afford to have 2-3 extras on hand in case you damage one in the field. Just grab a spare from the shop, unscrew the old one and screw on the new one and you’re up and running again. The leader hose also boosts jobsite safety. When operators see one emerge from the line they know the end of the hose will follow shortly, alerting them to power down the pump.

Finally, another way to increase the life of your hose is to regularly inspect every inch of the hose for nicks and cuts. It is suggested that you perform an inspection at the start or end of a job, or even both. Some supervisors have their crew take the hose completely off the hose reel every week laying it out in the parking lot for a thorough inspection. If a worker finds a defect, they tag it out and the hose gets repaired or replaced. This is very time consuming but may well be the most valuable half-hour that the operators spend each week. There is a lot at stake when a hose goes. The braid on a jetter hose is like a suspension bridge; when the strands starts to break away, eventually the bridge is going to fail.

It is understandable that operators may not want to take the time to inspect their equipment and especially the hose. This inspection can help prevent costly damage and terrible accidents though. Also note that hose repairs can not be done with a hose clamp and duct tape. There is no way that’s going to hold back water at 3,000 psi. Take the time to inspect and be safe.

OMAG has a grant for Sewer Maintenance Equipment. To learn more about this grant go to www.omag.org, click on “free services” then “grants and scholarships” and look for Sewer Maintenance Equipment Grant.

Reducing Inflow and Infiltration in Wastewater Systems

Stormwater flowing into a municipality’s sewer system through low gully traps, illegal connections, broken pipes, and unsealed manholes can cause overflows, system strains, and interruptions in your sewer operations. This is known as Inflow and Infiltration; aka I&I.

Why bother to fix Inflow & Infiltration?

By identifying I&I early and reducing their levels, municipalities can benefit from:

1. Reduced localized overflows: Through the management of overflows from manholes during rainfall, controlled overflow points, pump stations, and treatment plants.

2. Improve operational efficiencies: I&I reduces the sewer system capacity, limiting the potential for growth within a specific catchment.

3. Reduced ongoing costs: I&I results in clear water being pumped and treated along with wastewater, contributing to increased costs.

How to identify whether you have an I&I problem

Councils and water authorities can identify whether they have existing I&I issues within their system by looking for these indicators:

• Pumps run for hours and inflows increase significantly during storm events

• The hydraulic loading of wastewater treatment plants increases significantly after a rain event

• Localized overflows occur within a collection system during a heavy storm event

• An increase in inflow during dry weather conditions compared to previous months

Steps to reduce I&I within your wastewater system

First, identify the general vicinity of the issue through flow monitoring. Then identify the exact problem, locate the area(s) where it is occurring, and introduce measures to improve the situation.

The following steps provide a simple overview of an I&I reduction plan that can assist in identifying various stages associated with reducing I&I in a wastewater system:

1. Targeted monitoring – monitoring wastewater flows within the system

2. Identifying the problem – is it inflow or infiltration?

3. Source detection – where is it occurring within the system?

4. Rehabilitation – what can be done to reduce or eliminate the problem(s)?

Source detection

A few ways to detect the sources of I&I include:

Private Inspections – after receiving and documenting permission from property owners, inspecting private properties consists of visual assessments of the stormwater and wastewater networks within a property. Illegal connections could mean that a stormwater down pipe is directly connected to a wastewater gully trap.

Manhole Inspection – Manhole inspections can identify leaks from broken pipes, and joints due to tree root intrusion or design issues. Manholes can contribute to significant I&I through leaky covers as well.

Smoke Testing – Smoke testing locates I&I sources by identifying stormwater drain cross connections, broken pipes, and laterals, or unsealed manholes.

Dye Testing – Dye testing can be used to identify leaks and confirm smoke test results. The method uses water mixed with a non-toxic dye. The colored water Is pumped through the ground and storm water system and appears in the sanitary sewer collection system where leaks and illegal connections occur.

CCTV (closed circuit television) cameras – CCTV allows authorities to visualize the inside of pipes by using a small camera that travels down the length of a pipe to produce a visual representation of its condition. CCTV inspections can reveal the need for rehabilitating leaky pipes, facilitate grease or root removal, identify improper taps into the municipal lines, or find broken lateral connections.

Rehabilitation of Wastewater systems

Rehabilitation can include, but is not limited to, the following:

• Seal manholes and replace leaky covers

• Use cured-in-place piping (CIPP), trenchless rehabilitation or chemical grouting to seal leaks, and open cut replacement pipes

• Raise gully traps and disconnect stormwater downpipes from the gully trap and redirect into stormwater systems

• Fix broken laterals (reline or replace); fix any other private connections which might be improperly or illegally tapped into the municipal system

OMAG Risk Management Services wants to assist our municipalities in providing a safer and more efficient sanitary sewer system for their constituents. We offer several grants and programs to help you get started. Contact William Sheppard (wsheppard@omag.org) for more information if you are interested in improving your sanitary sewer system by reducing Inflow and Infiltration.

First Recipient of the OMAG Sanitary Sewer Equipment Grant (Lone Wolf)

Congratulations to the Town of Lone Wolf! They are the first municipality to receive OMAG’s new Sanitary Sewer Equipment (SSE) grant.  The grant was used to purchase a refurbished Sewer Equipment Co. of America Model 747 jetter unit. Prior to making use of the SSE grant, Lone Wolf didn’t have a jetter. Now, with the addition of this jetter along with their sewer push camera, Lone Wolf will be able to better identify problem areas and maintain their sewer collection system.

OMAG recognizes there are few if any grant opportunities for the purchase of sanitary sewer equipment. In response, the SSE grant was introduced in July 2020.  The SSE grant is a 1:1 matching funds, post-purchase grant with a maximum benefit of $6,000, and is available to all OMAG plan participants.

If you need more information, contact William Sheppard at wsheppard@omag.org or by calling (800) 234-9461.

Don't Flush Wipes!

Dangers of Flushing Those “Flushable”

Wipes People are flushing wipes down toilets – and this is causing dangerous problems for both private citizens and municipalities’ sewer lines. The flushable wipes cause private sewer lines to back up at a cost to the homeowner, but if they make it into the municipal sewer system they can mix with greases and cause major sewer backups in the lines. If they make it into the wastewater plant they can damage system machinery.

Toilet paper is designed to disintegrate in pipes and sewage systems, but wipes are not. They’re typically made with synthetic materials, plastics or polyester, that won't break down. So even if they flush down the toilet, they end up clogging sewers. This poses hazardous risks to sewage professionals that must break these clogs up and the costs are considerable. Some cities have spent millions of dollars a year to address damages and clear pipes.

As wipes meet cooking fat in the sewage system, they build up into a monstrous obstacle, a “fatberg.” A fatberg is a huge mass of solid waste largely consisting of cooking fats, disposable wipes, tampons, and other sanitary items that get flushed down the toilet. They’re unhygienic, expensive to fix, and incredibly gross. Clogs and fatbergs make jobs that are already hazardous and very difficult even more so.

So, why are wipes advertised as “flushable”?

You can attempt to flush many things down a toilet (if you have a child, perhaps you've seen the random stuff someone may put down the drain...) but that doesn’t mean they’ll effectively move through the sewage system.

Companies can currently label wipes as “flushable” simply because they aren’t restricted from doing so. Companies aren't required to prove flushability before asserting this claim and it seems most would fail any such test. A study out of Canada tested 101 wipes on the market for flushability and not even one passed. This marketing technique is misleading, and we need provisions to keep companies from freely using it and sparking customer confusion.

While there have been policy attempts to curtail deceptive “flushable” labels (California is debating a bill that would require products to be clearly labeled.) these moves have been met by significant resistance from the industry.

Solutions to Keep the Pipes Clear

One of the last things we need during a serious global pandemic is clogged sewers overflowing into the streets. Utility departments urge citizens to stop flushing wipes and to only flush bodily waste and toilet paper. Wipes are also not recyclable, so they need to go to the trash bin.

To address this issue beyond our homes, we can urge our elected officials to hold companies making these wipes accountable for the costs to our municipal sewage systems. We can also contact companies by tagging them on social media and ask them to stop using “flushable” claims.

If you value the health of your community and your sewer system, please contact your local newspaper and have them pass on the information about flushable wipes clogging up our sewer lines or put a copy of this article in with your utility bill.

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*Image used from: https://www.alphr.com/energy/1007087/londons-monster-fatberg-human-waste/

City of Weatherford: A CMOM Success Story

The Oklahoma Supreme Court has stated that “The maintenance and repair of [city] sewers is a corporate or proprietary function of a city and the city is liable for injuries sustained because of its failure to maintain and repair sewers properly.”  Oklahoma law requires municipalities “to use reasonable diligence and care to see that such sewer is not clogged ... and is liable for negligence in the performance of such duty to a property owner injured thereby after reasonable notice of the clogged condition of its sewer.”[1]

During 2004, the City of Weatherford had 48 sanitary sewer overflow claims resulting in a Consent Order from the Oklahoma Department of Environmental Quality (DEQ). Included in the Consent Order was the development of a CMOM (Capacity, Management, Operations, and Maintenance) Program to control their sanitary sewer overflows (SSOs).

The 2005 implementation of Weatherford’s CMOM program included the purchase of a trailer-mounted jetter and a dedicated crew of two full-time employees tasked with sanitary sewer collection system maintenance and record keeping for annual reports to OK-DEQ. Today their program has grown to three full-time employees, two trailer-mounted jetters, two vacuums, and a rover CCTV camera complete with a van. Weatherford has gone from having 48 SSOs in 2004 to averaging less than 2 per year from 2005 through 2018. Liability costs are greatly diminished and quality of life for the residents of Weatherford has improved.

The City of Weatherford’s sewer maintenance crew cleans over 250,000 feet of sewer line per year and video inspects about 3,400 feet per year. Their CCTV camera (OMAG has a grant for CCTV camera purchase assistance) removes the guesswork in determining what obstructs the line (roots, grease, debris, line collapse, etc.) and where exactly the problem is in the line. Then they can develop a plan to fix the problem and service the line. Weatherford uses root foam on about 7,000 feet of line per year (OMAG has a grant for Dukes Roots purchase assistance). Larry McKillip and his crew recommend using a Warthog jetting nozzle when jetting lines especially if they contain root balls. Larry says the Warthog is much more effective than mechanical cutters and saws, because the saws get stuck and are hard to dislodge, resulting in the need to dig up a line and break the pipe to retrieve the tool.

Trent Perkins, Public Works Director for Weatherford stated, “maps are critical for productivity.” That is why the city contacted their local COG (Council of Government)- SWODA for assistance in locating and mapping their water and sewer lines.  Through a grant (COG provides grant assistance for REAP and CDBG programs provided by the Oklahoma Department of Commerce,) the city has a viable computerized map showing the locations of all their water and sewer lines as well as manhole locations. OMAG can also assist member municipalities in gaining helpful information about their sewer systems using the SL-Rat (Sewer Line -Rapid Assessment Tool). This tool is loaned to cities and towns to quickly assess and map their sewer lines and determine what areas of town need maintenance, repair, or replacement, so municipal leaders can formulate a plan and budget for said infrastructural improvements. It is our belief the SL-Rat is an excellent tool for municipalities to use if they are seeking a REAP or CDBG grant.

Since sanitary sewer overflows are the most frequent liability claim filed against municipalities and authorities annually, and the cost of SSO claims continues to increase each year, OMAG recommends our cities and towns investigate utilizing resources to rehabilitate their aging sewer infrastructure.

A CMOM or any sewer line maintenance program is a costly start-up investment in time, staffing, and money, but it will quickly pay for itself by reducing sanitary sewer back-up claims. Citizens like to see capital improvements like new fire trucks, police cars, parks, and ballfields (the stuff we can see), but it’s also true they don’t like to have raw sewage running into their homes and businesses. Oklahoma leaders have been talking about our aging and disintegrating infrastructures for years. It is time to start making plans for major overhauls of these systems. Don’t wait for a consent order from OK-DEQ - take advantage of the resources available to you and start making the changes now.

According to Trent Perkins, “Personnel is the most important factor in the success of a sewer maintenance program, that and having the proper equipment, but support from the city’s mayor and council is key to our success.” Mike Brown, Mayor of Weatherford stated, “The City of Weatherford is thankful and proud that OMAG recognizes our efforts utilizing the CMOM program. Trent Perkins and his crew do an outstanding job maintaining our water and sewer lines. We appreciate the partnerships with SWODA and OMAG working with Weatherford to provide the best services available to our citizens.”

For more information about borrowing an SL-Rat from OMAG or to inquire about a CCTV camera or Duke’s Root Control grants contact William Sheppard or Kip Prichard at (800) 234-9461.

[1] Spencer v. City of Bristow, 2007 OK CIV APP 67, ¶ 12, 165 P.3d 361, 364

SEWER NEWS: Understanding CMOM (Capacity, Management, Operations and Management)

CMOM programs are a best practice for sewer line collection system owners and operators. Both comprehensive and holistic, a CMOM provides an information- based plan to effectively run a sewer collection system and help lower the risk of National Pollutant Discharge Elimination System (NPDES) permit violations and discharge violations. The EPA notes in their Asset Management for Sewer Collection Systems fact sheet: “Lacking adequate focus on operations and maintenance, many collection system utilities have slipped into a reactive mode, with most of their operational resources allocated to emergency response and rehabilitation or replacement of failed systems.” Instead, a proactive and even predictive approach is encouraged by following the CMOM program.

In 2005, the EPA published a guide to evaluating and structuring a Capacity, Management, Operation, and Maintenance program. The CMOM approach is not enforced by regulatory authorities, nor is it legally binding, but can be mandated as a response to consent decrees. CMOM program documentation and subsequent audits may also be required when submitting applications for an NPDES permit. The goal of the CMOM process is to assure that discharge from treatment facilities is free from pollutants. Therefore, preventing sanitary sewer overflows, which are illegal under the Clean Water Act, is a priority.

In a CMOM program, emphasizing all four segments equally will reap the most benefits, but the backbone of the program is the management portion. Utility optimization through CMOM programming aims to be adaptable, changeable, and frequently updated, moving away from the traditional long-interval master plans. Therefore, it is difficult to implement a CMOM program without reviewing the internal components of managing a collection system – things like organizational structure and staffing, training and budgeting. An effective management system helps ensure the operations and maintenance portions of the program can fully be addressed.

Collection system operation also supports review, standardization, and transcription of activities and procedures within a department. Proper documentation allows for increased accessibility and accountability with a collection system’s organization. Operators and administrators thus identify and reflect best practices and ensure processes are kept consistent. This information, time and again, proves valuable in the event of an emergency.

The EPA notes some of these responsibilities may include “monitoring discharges into the collections system for individual users; monitoring to determine the effects of sanitary sewer overflows on receiving waters; and recording any sampling that is done, according to the Guide for Evaluating CMOM Programs at Sanitary Sewer Collections Systems. Other operational activities include safety procedures and emergency preparedness and response programs. The EPA guide also lists modeling and mapping under the operations umbrella. New technologies, like tracking with flow rate monitors, are making it easier to create and structure managerial and operational tasks and even automate some maintenance activities.

Operation and maintenance are often grouped together because their activities are so interrelated. The goal is to keep maintenance planned, as opposed to unplanned. Efficient assets have a longer useful life and reduce the likelihood of failure, decreasing emergency response costs. Like other aspects of a CMOM program, establishing written protocols helps standardize procedures and provides data that can be analyzed for patterns and trends.

Ensuring pipelines are prepared to carry the necessary capacity is a complex task. The capacity of a collection systems relies on a number of variables, including the population being served, total system size, and location of house lateral lines. A routine evaluation of capacity can be coordinated in conjunction with the other operations and maintenance activities to round out a CMOM program. Determining capacity requires both testing and inspecting, which largely focus on finding sources of inflow and infiltration (I&I). I&I is a significant contributor to SSOs and CSOs during wet-weather events. Inspections are moving away from confined-space entry methods for the safety of inspection personnel, instead opting for qualitative testing and methods that utilize CCTV inspection technology and collect comprehensive data. Rehabilitation programs are also essential to CMOM and the goals of avoiding emergency situations and staying preventive and predictive.

Implementing a CMOM program is not an easy task. It is both comprehensive and complex but worth the investment of time and resources because the benefits can be felt in both the short and the long term. In the pursuit of increasing efficiency, a CMOM program helps collection system owners and operators identify where the system and the organization as a whole are thriving and what areas need improvement.

Thankfully, the bulk of the work in putting together a CMOM program is to codify and fine-tune existing processes within a collection system. The EPA and other government sources have released numerous resources to assist owners and operators in putting a CMOM program into action. For more information on how to get your municipality’s CMOM program started, go to https://nepis.epa.gov/Exe/ZyNET.exe.

Using OMAG's SL-RAT - Feedback From 2 Cities That Have Used It

Last Fall, OMAG purchased 3 Sewer Line Rapid Assessment Tools (SL-RATs). The reason for the purchase of this equipment was to loan them to our member municipalities to update and develop sanitary sewer maintenance programs. Following are some questions OMAG’s Risk Management Department asked these cities, with their responses. We thought the rest of our member municipalities might like to see what was said about participating in the SL-RAT program. Here are the responses from Jay Neal, City of Durant and Matt Duke, City of Muldrow.

Question: Why did you choose to participate in the OMAG SL-RAT programs

• Durant: We have an aging wastewater distribution system. We are seeing an increase in the amount of sewer related issues. Having been in my position only 2 years, at that point, I felt it was incumbent upon us to do a “fitness” report on our sewer system. The SL-RAT tool provided the means to do that.

• Muldrow: We knew we had problems in our collection system and wanted to isolate the problems. We also have inaccurate and outdated prints that do not show all of our manholes, or the manholes were not in the correct location on the prints.

Question: Did the SL-RAT meet your expectations as to its usefulness? If so, how?

• Durant: It exceeded our expectations. As with all newer technologies, it’s easy to be reluctant to accept its usefulness. However, the SL-RAT proved up to the challenge. Once we figured out its limitations and the best time of day to put it to use, it gave us an accurate picture of our sewer infrastructure and provided the data necessary to analyze it.

• Muldrow: Yes, we have a great idea on where our problems are and we now have a good working print (map).

Question: What will you do with the information you acquired from using the SL-RAT?

• Durant: When possible, we are keying in on the lines that were substandard to determine which, if any, need replaced or repaired. If we are able to use it again after we have serviced those lines, we will be able to start trending problem areas and creating work-arounds.

• Muldrow: We will now be able to jet our problem areas and use the camera we obtained through an OMAG grant to find out why the lines are having problems. We will also be able to make prints of our collections system and have accurate locations of our manholes.

Question: What are some of the positive aspects of using the SL-RAT for improving your sanitary sewer inspection and maintenance program?

• Durant: The biggest advantage the SL-RAT provides is to afford our department a proactive way to deal with sewer problems instead of putting us in a more reactive posture.

• Muldrow: We have isolated problem areas that were unknown and eliminated other areas we suspected had blockages. We found that just physically opening all or our manholes was also a great benefit, because we were able to find some that were in need of rehabilitation and sources of I & I.

Question: What, if any were some of the complications you encountered while using the SL-RAT?

• Durant: There are some variables that you have to contend with when using the SL-RAT. However, these issues are systemic to the environment and less to do with the equipment itself. Satellite hindrances, such as cloud and tree cover, inclement weather, and undulations in the sewer lines that lead to improper or inaccurate ratings did occur. There were a few instances where the two components would not synchronize. Some of those were user error and the others were undetermined in origin.

• Muldrow: None, it was a very efficient system.

Question: Would you recommend that other Oklahoma municipalities  take advantage of OMAG’s SL-RAT program? What advice would you give them to take full advantage of their time using the SL-RAT?

• Durant: I would highly recommend that other municipalities take advantage of what the SL-RAT can provide, in regard to their wastewater distribution system. The integration into Google Earth and the ability to export to Microsoft Excel for in depth analysis is worth the price of admission in and of itself. Furthermore, it provides an excellent form of accountability for the department and a quantifiable way of determining problem areas and justifying repairs. As far as advice to other municipalities, I would say, “know the general pulse of your town; meaning, know your off-peak times of the towns sewer usage. The tool will provide a more accurate read during low usage times on your respective lines. Have a dedicated team assigned to this project with little or no distractions to take them away from the project. Have a plan that provides the most coverage possible for the time you will be using the SL-RAT. Lastly, work with your upper management to ascertain their goals for the usage of this product.”

• Muldrow: Absolutely. This tool gives you a chance to quickly assess what areas of your collection system are needing maintenance and makes you locate manholes that could have been lost over time. I found that having a three-man team made the process move along as quickly as possible. By having two guys working the machines and one in front of them locating manholes and popping lids, we were able to move through town at a quick pace. This tool gave us the same information we had previously paid for, at a fraction of the price.

For more information about the SL-RAT or to schedule having one brought to your municipality to assess your sewer system, contact William Sheppard at (800) 234-9461 ext. 138 or wsheppard@omag.org.