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IDDE Scenario Introduction The following presentation and scenarios are a supplement to the August 2008 NEWSC IDDE Training Power Point Presentation and

Mar 27, 2015

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Slide 2 IDDE Scenario Introduction The following presentation and scenarios are a supplement to the August 2008 NEWSC IDDE Training Power Point Presentation and the Group A Scenario Interactive Presentation. This is to be used as a guidance tool to aid in to how to potentially respond to illicit discharge being reported. Select a scenario from the following index slides and walk yourself through the situations. Click for next slide Slide 3 IDDE Scenarios General Scenario Overview Table Tacky Situation Wax Job Blue Water Broken sanitary sewer Up from the ground comes a bubblin crude Not bubblin but got crude Questions Exit Click for next index slide Slide 4 Scenario Call 911? Call I.D. Coordinator Employee notices grease and/or cooking oil going into storm drain during restaurant inspection Employee spills less than one gallon of gasoline while fueling a municipal vehicle it does not enter the storm sewer; is contained and cleaned up Written record shall be submitted Employee spills less than one gallon of gasoline while fueling a municipal vehicle it does enter storm sewer Employee notices large amount of unidentified substance on the river while in the field performing other work related activities. Employee notices an unidentified substance discharging from an outfall to a waterway while performing other work related activities Scenarios NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO YES Return to Scenario Index Slide 5 Tacky Situation The weather forecast calls for a slight chance of showers for the morning. Therefore, a paving contractor decides not to check the local radar to see if there is any weather in the area and proceeds to start placing liquid tack onto the existing pavement. After placing 90 gallons of tack there is a 15-minute cloud burst which flushes 30 gallons of the tack down the gutter line and into multiple storm inlets. Two of the inlets discharge to a storm water pond and the third discharges to a unnamed tributary to a coveted creek. Click for next slide What would you do? Slide 6 Tacky Situation Click for next slide Slide 7 Recommended Action: Fill out Initial Contact Form? Call 911? Notify the Illicit Discharge Coordinator? Call Municipalities Operation Department to Assist in providing storm sewer information? Contain and identify the substance? Find the source of the discharge? NO Tacky Situation Contd. YES NOYES NOYES NOYES NOYES NOYES Click for next slide Slide 8 Since the contractor was present you already knew who the responsible party was and what the substance was, therefore the fire department was not involved. Temporary dikes were made with sand bags and oil dry prior to the inlets and small absorbent booms were placed at the outfall at the tributary. These materials were supplied by the municipality because the contractor didnt have any of those materials readily available. Thankfully, the tack settled out in the large storm sewer and none of it discharged to the tributary. Unfortunately, the storm water pond wasnt as lucky as trace amounts did make it to the pond which caused a dark discoloration of the water. Tacky Situation Contd. Click for next slide Slide 9 Tacky Situation Contd. Click for next slide Residual Tack in Storm Outlet Pipe Contaminated Pond Forebay Temp Sandbag Dike w/ Oil Dry Small Absorbent Booms in Channel Slide 10 Oil dry was placed in the gutter lines to absorb any remaining tack which was then swept up and taken for disposal. The storm sewers were cleaned and the water was collected and taken to be treated. Some of the sediment from the storm water pond was dredged out and taken for disposal as well. Tacky Situation Contd. Return to Scenario Index Slide 11 You receive a phone call from the local sanitary treatment facility that you may be having a sanitary sewer back-up as there is liquid coming out of a manhole in the middle of the pavement. Wax? Click for next slide What would you do? Slide 12 Recommended Action: Fill out Initial Contact Form? Call 911? Notify the Illicit Discharge Coordinator? Notify WDNR? Contain and identify the unknown substance? Find the source of the substance? Call Municipalities Operation Department to Assist in providing storm sewer information? NO Wax Contd. YES NOYES NOYES NOYES NOYES Click for next slide NOYES NOYES Slide 13 Wax Contd. Upon arriving on site, you notice the large wet area and check the first inlet and you let out a big sigh of releif as it didnt find its way to the inlet. You then look down the roadway and notice that it has made its way down the curb line to a different inlet. You now have a double header of a sanitary sewer back-up and an illicit discharge. Upon receiving the phone call and taking some of the initial information a phone call to the operations department was made to have them respond to the situation and treat it as a sanitary sewer back-up. HOWEVER, since the discharge was on the pavement there was the potential that it has made its way to the storm sewer system. Click for next slide Slide 14 Sand bags were placed in the gutter line just prior to the inlet to dam up any additional discharge. The crews dislodged the obstruction within the sanitary sewer which eliminated any further discharge onto the pavement. Once the flow had stopped, gypsum was spread out on the pavement to absorb the wet material. They gypsum was allowed to sit for a period of time and then swept up and disposed of. Since the discharge had gotten into the storm sewer, sand bags were placed in the storm sewer at a down stream location that was also out of the main roadway for safety purposes and to ensure that a majority of the illicit discharge was contained. The storm sewer was then flushed, cleaned and vacuumed out to collect the gray water. The WDNR was informed at the time of the incident, after the incident was contained and then again after the site had been cleaned up. The cause of the sanitary sewer back-up has been investigated. It was initially presumed to be grease from local fast food establishments, but they actually discharge to other sewers. The only properties hooked to this sanitary sewer main is a gas station with a C-store and a car wash. The sewer was televised and the remaining material in the main appears to be wax. Wax Contd. Return to Scenario Index Slide 15 Blue Water You are on your way to a NEWSC Committee meeting when your cell phone rings. You note that it is a member of your municipalities Operations Division. What would you do? A.Dont answer the phone because you want to set a good example to other drivers and not talk and drive. B.Answer the phone because its your job. Click for next slide You answer the phone and are informed that Operations has come across a water way that is a pretty blueish / greenish in color. They dont know exactly what it is or where it is coming from. There is a directional boring contractor down the road. They state that it does not appear to be sewer dye. What would you do? Slide 16 Recommended Action: Ignore it. Its a pretty blue/green color therefore it cant be hurting anything? Call someone else to handle the situation, as you are going to a NEWSC committee meeting? Fill out Initial Contact Form? Call 911? Notify the Illicit Discharge Coordinator? Call Municipalities Operation Department to Assist in providing storm sewer information? Contain and identify the unknown substance? Find the source of the discharge? NO Blue Water Contd. YES NOYES NOYES NOYES NOYES Click for next slide NOYES NOYES NOYES Slide 17 Being the dedicated NEWSC individual you call another staff member to go and investigate the situation. You relay as much information to them as possible and inform them to follow the protocol established in the Spills Response Manual. They ask if they should call 911 and you respond that will need to be a field determination but from the information you are receiving it sounds like a dye of some sort. Then call WDNR to give them a heads up that you have something going on and will keep them informed. When the person arrives on site they see a pretty teal colored waterway. The color starts at a culvert which a storm sewer ties into, but looking up-stream in the storm sewer system, there is no signs of this teal colored water. Blue Water Click for next slide Slide 18 Blue Water Click for next slide Slide 19 It is noted that during the period of time that you are there the coloring is fading. The neighbors come out and ask what is going on. They inform you that this happens frequently but not linked to any rain event. The boring contractor has been there most of the summer but have not been using any dyes. They property to the east is agricultural lands and the property to the west is a golf course. The WDNR arrives on site and assists with the investigation. In a short period of time, it was determined that the golf course had recently applied a liquid fertilizer to the greens which contained a blue/green dye. The golf course then cleaned their equipment over or near a private catch basin which then flows into the municipalities storm sewer which ultimately flows to the waterway. The fertilizer also contained copper sulfate which added blue coloring to the water. Blue Water Contd. Click for next slide Slide 20 Blue Water Contd. Return to Scenario Index Slide 21 Broken Sanitary Sewer An inexperienced operator of a building demolition contractor was at the controls of a track hoe. The operator dug down to find the sanitary lateral without any supervision or Diggers Hotline Locates. He not only removed the lateral but also removed a section of the Citys sanitary sewer main. The operator figured that was good enough just to remove the sewer and buried his mistake and left for the day. About three hours later an individual notified the operations department that a small lake was forming in the low area on the property. Click for next slide What would you do? Slide 22 Broken San. Swr. Contd. Cli