Sewer Flow Testing, Smoke Testing and Manhole Inspection

Sewer Flow Testing, Smoke Testing and Manhole Inspection March, 2013

Primary Purposes of Study Determine Infiltration and Inflow Collect Field data about this area of the Collection System Start an Inventory of Manholes and other structures.

Study Area was Chickasaw Area of Homer Glen Area starting to see increases in growth Mid- 1970 s construction Can area sustain added growth on top of older infrastructure?

Project Divided into Three phases Flow Monitoring to detect I & I Smoke Testing to show infractions and areas needing remediation Manhole Inspection and Inventory

Phase I: Flow Monitoring Chosen to narrow down problem area. Map (next slide) shows area Flow Monitor 1 all flow will pass this point. Flow monitor 2 will monitor flow from North area into the larger area. Flow totals of monitors compared for analysis

13490 14032 6" 140'-10" 14033 CH-729 240'-8" CH-728 14027 13350 220'-10" 14025 CH-889 13487 14021 CH-714 CH-870 CH-715 13522 13310 CH-819 13208 13210 13130 CH-820 13220 CH-818 CH-801 260'-8" DERBY RD. 240' 8"PVC 195'-8" 13205 13202 13201 CH-722 CH-817 14024 14020 14016 14014 14008 14002 14001 14007 14011 CH-802 13953 101'-8" 13952 13204 13944 CH-709 CH-803 13203 13206 13205 CH-804 13521 13542 13936 400'-8" 13928 13920 200'-8" 13207 13910 CH-706 13208 13536 CH-805 355'-8" 13210 175'-8" 13209 240'-8" CH-806 CH-710 13945 13937 13929 13845 13526 13527 13904 13864 13537 13852 13211 13846 13875 13212 13102 CH-823 13104 13106 289'-8" 13838 13835 13850 13860 13870 101'-8" RED DR. 13108 CH-705 CH-824 CH-814 350'-8" 13213 13830 13840 13865 13101 13103 CH-813 13105 CH-812 13214 CH-807 CH-833 13875 13820 13830 13845 CH-832 13865 13855 13110 182'-8" 13850 13112 400'-8" 115'-8" 317'-8" 13814 CH-831 13107 CH-808 13845 13820 CH-825 345'-8" 13825 13830 CH-811 13109 172'-8" 13215 13827 13821 13813 13530 164'-8" 13802 110'-8" 13540 13835 CH-815 13111 CH-810 13113 CH-809 236'-8" 95'-8" CH-816 13202 13810 CH-826 CH-830 13815 13805 13820 13201 13825 CH-869 200-6" MONAGHAN RD. 230'-8" CH-703 13531 200-6" 13527 13764 13810 LIFT STATION & WET WELL CH-880 CH-773 12910 13800 136'-8" 13752 13805 260'-8" CH-834 CH-821 CH-835 12920 13801 13800 FORCE MAIN 13744 13745 CH-829 CH-822 59'-8" 225'-8" 150'-8" 13775 13770 CLEANOUT 13733 200'-6" 13736 400'-8" 194'-8" 13005 13760 CH-842 13729 13765 13025 CH-828 CH-863 13728 13760 13765 CLEANOUT 13725 13720 CH-774 13750 CH-841 13755 13715 13740 13712 13745 260'-8" 13740 13745 6" PIPE, PVC 13705 13704 13730 CH-827 13725 13715 13665 13556 CH-840 13664 400'-8" 13730 13735 13655 13552 155'-8" 13654 13700 12910 12920 13720 CH-839 13647 13705 13725 13646 2500'-6" CH-775 13546 CH-843 12940 140'-8" 13638 13639 12900 13710 CH-838 12905 CH-844 12980 13715 13630 13549 12945 13700 13543 CH-701 12905 CH-845 13632 13537 114'-8" 400'-8" 13705 12900 CH-837 13614 13613 12975 CH-836 12915 13020 13604 CH-665 12995 13040 CH-776 13607 13506 13516 CH-666 13522 12910 CH-853 CH-850 12925 13005 PARKER RD. 115'-8" PARKER RD. PARKER RD. 13015 263'-8" DIP 12930 348'-12" 12935 12945 13035 CH-852 CH-851 CH-662 CH-779 13610 173'-8" CH-663 128'-12" CH-664 13501 13533 13543 13554 162'-8" CH-849 12940 CH-857 13045 284-8" 12955 12950 13040 300'-8" DIP 13540 13530 13030 ARCTIC CT. CH-866 CH-848 13020 CH-856 CH-858 13035 13530 13525 13515 13505 13455 13445 13435 266'-8" 282'-12" 13542 13545 13314 13324 13405 CH-751 CH-752 13426 CH-753 CH-747 13436 13404 CH-746 13456 13310 CH-778 13535 13532 CH-673 13304 150'-8" 340'-10" 305'-10" WEST RED COAT DR. 13525 13505 13522 13310 13323 13333 13343 13407 13506 CH-745 13530 400'-8" 13515 200'-8" 12960 12970 CH-750 13410 13510 339'-8" 12965 200'-8" 275'-10" 13409 CH-847 CH-855 12980 13540 13440 CH-757 12975 190'-8" CH-749 CH-846 348'-8" 12985 13000 13430 13080 13090 FORCE MAIN 13314 13316 13020 13040 13050 13060 13070 12995 CH-861 CH-854 CH-859 CH-761 CH-763 CH-862 CH-762 13140 CH-748 CH-760 DR. 13005 247'-8" SILVER FOX DR. CH-756 13055 13065 13075 13085 13095 13035 13045 13415 13508 13510 13512 13514 13516 13518 13520 13522 350'-8" 13410 13411 CH-744 275'-10" 13313 13313 13315 13510 13520 339'-8" 13412 13120 13200 13220 13310 13413 13320 190'-10" 382'-10" 350'-8" 382'-10" 220'-8" 13414 13330 13415 13105 13125 13145 13205 13225 13245 13305 CH-743 13507 13509 13511 13513 13515 13517 13519 13521 13523 13525 13502 13510 CH-777 13519 13456 CH-672 13515 13509 13448 CH-676 13436 13439 13610 CH-679 239'-8" 13520 13426 13425 CH-678 CH-677 13418 13527 13410 13025 CH-759 339'-8" 13501 13517 13406 13400 CH-860 13405 330'-8" 13325 13416 13417 13360 CH-768 350'-8" CH-602 13355 13335 CH-758 CH-755 13419 13277 13345 185'-8" 13272 13350 13355 13345 13140 13159 330'-8" CH-772 13340 13267 CH-767 13421 CH-742 358'-8" 13137 300'-8" 13423 350'-8" 13115 CH-754 425'-8" 13120 13100 13257 13247 13262 13252 13242 13335 13330 13325 CH-603 13320 13315 CH-766 13524 13425 CH-741 13310 13308 13318 13328 13424 193'-8" 13440 350'-8" 13305 13300 13103 13302 13304 13237 13306 13525 EAST RED COAT DR. 302'-8" 400'-8" 225'-8" 173'-8" 300'-8" 215'-8" CH-770 CH-771 CH-872 CH-765 13232 13222 13300 13301 CH-584 CH-769 CH-737 13349 CH-583 13540 13260 13127 13199 13289 CH-738 CH-739 13409 13429 13439 CH-740 13149 13167 13179 13187 13257 13309 230'-10" 13319 13329 13426 13250 13553 13531 13543 13227 270'-8" 13251 13240 373'-8" 13231 13230 13230 13221 13220 13130 13380 13390 13150 13170 13180 13320 13400 13410 13420 13220 CH-597 13250 13330 13350 13370 13290 13430 CH-609 CH-626 CH-627 13270 CH-628 CH-629 CH-630 CH-620 CH-621 CH-622 13210 13211 CH-631 200'-8" 13210 FOX HILL DR. 225'-8" 225'-8" 245'-8" RED FOX CT. 385'-8" 350'-8" 250'-8" CH-623 13433 CH-615 13200 CH-608 13201 236'-8" 13111 13215 13141 13161 13181 140'-8" 13241 13261 13329 13357 95'-8" 13202 13403 13417 13423 330'-8" CH-608 250'-8" 13221 13437 13126 CH-625 CH-634 CH-619 13317 195'-8" 13202 13163 13161 13161 13159 13157 13207 13128 13205 CH-614 13152 CH-635 150'-8" 13320 CH-624 156'-8" 13315 395'-10" CH-633 13320 105'-8" 13144 CH-792 CH-793 13162 13195 13190 13141 13160 13192 13197 13203 CH-632 13325 CH-616 13210 CH-613 13134 CH-607 13133 13185 13180 13190 283'-8" CH-617 13204 13200 13331 13201 125'-8" CH-618 CH-612 13124 13330 13123 CH-659 13187 13182 CH-799 CH-652 125'-8" 180'-8" 13175 13170 CH-650 13191 13180 80'-8" 13116 300'8" 13177 200'-8" 13341 13340 13181 13172 13171 CH-611 13170 13106 13165 13160 270'-8" 240'-8" 13167 13350 CH-660 CH-653 13162 13062 13155 13150 13351 CH-651 13161 13160 52'-10" 295'-8" 110-8" 200'-8" CH-605 CH-636 13054 CH-798 CH-661 13152 CH-649 13360 CH-610 13361 13151 13150 13145 CH-643 13157 90'-8" CH-658 13140 CH-654 13370 13044 CH-791 13330 CH-637 355'-10" 400'-10" 13103 13105 13142 13132 13124 13114 13104 13062 13054 13044 13036 13026 13063 13053 13043 13120 CH-657 CH-644 13200 CH-655 CH-656 13230 CH-647 13390 CH-645 13250 13142 CH-646 13300 13430 115'-8" 13377 CH-638 13140 CH-639 215'-8" 355'-10" CH-640 13034 13035 CH-648 360'-10" 120'-10" 13351 13387 155'-10" 13151 CH-641 13508 CH-788 CH-789 13171 CH-604 13191 13331 13026 CH-871 13025 13528 13542 13131 13201 13231 13301 240'-8" 13136 13409 13251 13419 13101 13439 13459 13271 13291 13133 13479 70'-10" 135'-10" 13499 CH-642 13503 13513 13521 13531 13539 13547 13557 13103 13106 1 113'-8" NORDIC CT. 167'-8" 139'-8" KIT LN. 2 281-8" SILVER FOX DR. 240'-8" DIP SILVER 3 FOX 230'-8" GRAY LN. 252'-8" PARKER RD. 270'-8" DIP KIT LN. 180'-8" DIXON-WAY DR. 305'-8" DIXON-WAY DR. 155'-8"180'-8" 204'-8" 122'-8" 144'-8" DIP 238'-8" DIP 50'-8" 216'-8" 388'-8" BLACK FOX LN. ARCTIC LN. 200'-8" 131st ST. 131st ST. 131st ST. 131st ST. 131st ST. 131st ST. 131st ST. 131st ST. 131st ST. 260'-8" LN. TRAIL 95'-10" MOORFIELD CT. MEADOW HILL LN. FOX 120'-10" 213'-8" 100'-10" 205'-8" 143'-10" 5 130'8"PVC 130'-8" 200'-8" 400'-8"PVC 250'-8" 227'-8" RED DR. 6 110'-8" FOX BURROW LN. 7 338'-10" 150'-10" 8 200'-8" 345'-10" BRIAR PATCH LN. 9 303'-8" 120'-8" 240'-8" 120'-8" 290'-8" FOX HILL DR. PATCH LN. 10 115'-8" 260'-10" 155'-10" 120'-10" 268'8"PVC HUNT MASTER LN. HUNT MASTER LN. FOX HILL CT. 200'-8" HUNT MASTER LN. 290'-10" 360'-10" DERBY RD. 175'-6" 140'-8" SOUTH RED COAT DR. SOUTH RED COAT DR. 229'-8" FOX HILL DR. 348'-12" 200'-6" 285'-8" 125' 10" 135th ST. DERBY DR. DUBLIN DRIVE DUBLIN DR. DUBLIN DR. CHOCTAW TRAIL CHOCTAW TRAIL CHOCTAW TRAIL 125'-10" 156'-8" 175'-10" 330'-8" KERRY LN. 335'-8" 211'-8" 6" SER. HEDGE APPLE DR. 221'-8"

Flow Monitoring set for anticipated wet Spring of 2005. 30 day initial study period Data collected from monitors twice each week. Rain gauge installed in area to monitor rain events. Flow totals of monitors compared to rain events for analysis

Flow Monitor #2 installed

Flow Monitor #2 installed Installed from street level with spring loaded ring inserted into upstream side of pipe. Sensor on ring measures depth of flow and velocity of flow Data collected by a data recorder over a set time period, then downloaded to laptop computer Software allows for data periods to be added in for total flow calculation

Flow Monitor #2 installed

Flow Monitor #1 installed Installed from street level with spring loaded ring inserted into upstream side of pipe. Needed extension on installation tool due to depth. (next slide) Sensor on ring measures depth of flow and velocity of flow This pipe is a 12 pipe.

Flow Monitor installation Had the manhole been much deeper, confined space equipment would have been needed. All precautions would have needed to be taken Always use experienced staff.

Preparing for entry into a manhole

Flow Monitoring Rain gauge used has recorder that uses the same programming as the flow monitors Uses a tipping bucket that records as little as.01 of rain. Easy to line up the timelines of each device for comparison

Flow Monitor Results 05 Spring did not have a lot of rainfall Study was extended another 30 days. One major rainstorm allowed for.91 inches in 24 hours and data showed some correlation of rainfall to increased flows in the Sanitary sewer.

Rain Gauge Results show spike on the 15 th to show start of project. No significant rainfall during time period. Rainfall amounts -- Scant rainfall indicated ------ Total Rainfall of 3.51 inches for 60 days

Flow Monitor Results on site # 2 Depth of flow Flow Velocity GPM Rain in Inches

Flow Monitor Results on site # 1 Depth of flow Flow Velocity GPM Rain in Inches

Flow Monitor Results No conclusive results to show increased flows with rain events on Monitor #2 No time period where rain amounts of over 1 in 24 hour period.

Site # 1 Flow Monitor Results Average flow level of 4.1 Flow Rate of 112 GPM throughout time period Shows Possible infractions of I & I.

Site # 2 Flow Monitor Results Average flow level of.05 Flow Rate of sporadic throughout time period Did not show possible infractions of I & I.

Flow Monitor Results Evidence did show on # 1 Monitor that there was some increase in flow with rain events This prompted further study by using Smoke Testing to locate Problem areas.

Phase II: Smoke Testing Total Length of pipe examined: 26,269 feet Non-Toxic liquid smoke used Neighborhoods notified by water bill mailer and door tagging area 48 hours ahead of testing Fire Department notified each day to prevent false calls

Phase II: Smoke Testing Program designed to check: Inflow from storm drain cross connections Roof Connections Faulty manholes Sewer Pipe problems Foundation Drains

Smoke Testing Procedure: Temporarily block off sewer pipe at lengths not exceeding 1000 feet Introduce smoke into sewer for no longer than 3-5 minute intervals. Photograph infractions and document event

Smoke Testing

Smoke Testing Water Service Smoking!

Smoke Testing Manhole lid leaking

Smoke Testing Possibly a leak on the Sanitary Main

Smoke Testing Private Home with a leak

Smoke Testing Private Service Line with potential leak

Smoke Testing Several Manhole Lids leaked

Smoke Testing Several Manhole Lids leaked

Smoke Testing For the 26,269 feet smoke tested: 35 infractions (average one infraction every 750 feet) for a system installed in the 1970 s 25 manhole lids 3 leaks from possible broken mains A couple of private line leaks

Phase III Manhole Inspections Carried out during the Smoke testing 144 manholes inspected and inventoried Data placed in a database for the Utility Photos of every Manhole

Phase III Information Collected for database LOCATION OF MANHOLE Street Manhole # Cross Street X,Y Coordinates (Measured from C/L of Street, Alley, Hydrant, etc) X: Y: GPS Coordinates Northing Easting Sewer Type Sanitary Storm Combined Other Site (street, parkway, alley, etc)

RIM Phase III Information Collected for database Rim Grade Flush High Low Picture # Rim Grade Adjustment (in inches) LID Cover Type Standard Vented Storm Grate Other Water Tight Gasket Lid Type Round, Solid Round Storm Grate Beehive Rectangle Grate Lid Dimensions (in inches) FRAME # of Holes Frame Adjustment Mortar Brick Concrete Ring Metal Ring Frame Adjustment (in inches) Seal at Frame Adjustment Good Fair Poor MANHOLE Construction Concrete Brick/Mortar Precast Concrete Poured in place Shape Round Square Rectangle Manhole Diameter Steps Safe Unsafe None Manhole Cone Offset Centered Flat Slab Wall Condition Good Cracked / Gaps Missing Sections Collapsing Observed Infiltration (yes/no)

Phase III Information Collected for database BENCH Bench Good Cracked Repair Remark Bench Condition Mud / Sand Mineral Deposits Roots None TROUGH Trough Good Cracked None Trough Condition Mud / Sand Mineral Deposits Roots None Pipe Material Clay Concrete PVC Other Depth from Rim to Trough Depth of Water in Trough Observed Flow Fast Medium Slow None

Evidence of High Water Mark (measure from Rim) Phase III Information Collected for database Vault Diagram: Inlet/Outlet pipes N o r t h **Diagram the Manhole ------- Number of Inlets Size of Inlets #1 #2 #3 #4 Number of Outlets Size of Outlets #1 #2 #3 #4 Comments:

Phase III Information Collected for database Include Pictures!! These can become part of the database

Phase III

Phase III

Phase III

Sewer Flow Monitoring, Smoke Testing, Manhole Inspections and Inventory Conclusions: The Flow Monitoring provided evidence of I & I. The Smoke Testing helped pinpoint the infraction locations The Manhole Inspection and Inventory provided a cost effective way to record the field data.