Condition Assessment Evaluation

Transcription

1 Attachment A. Field Activity Protocol Condition Assessment Evaluation In order to provide an appropriate level of system information to support sound rehabilitation and/or replacement decisions and to identify sources of I/I, a comprehensive field investigation should be performed. The field investigation will be performed in a phased approach. The Phase I investigation activities include: Smoke Testing Night Flow Isolation Manhole Inspection Upon review of the results of Phase I investigations, several Phase II investigations may be recommended, which may include: Dye Testing Mainline CCTV Inspection Lateral CCTV Inspection These activities and their approved protocols are described in this document. The Condition Assessment effort will be performed according to the following quality control procedures: 1. The City shall dictate the sequence of field activities. The Contractor shall not proceed from one field activity to the other without City approval. 2. All inspection forms prepared by the Contractor s crews shall be thoroughly checked by Contractor s project manager for errors and omissions and corrected prior to submittal to the City.. All original inspection forms shall be securely filed for future reference. Electronic copies shall be backed up and stored with off-site redundancy. 4. Due to the volume of information expected to be generated during the Condition Assessment effort, it is imperative that digital file management be made a priority. With that said, it is requested that each service area be backed up on a separate and appropriately labeled DVD (or approved data storage device). Data for each field activity shall be contained within an appropriately labeled master folder within each DVD. There should be a folder each for smoke testing, night flow isolations, dye testing, CCTV inspections and manhole inspections. For example, the Smoke Testing Folder should contain the following folders: o Summary of defects o o Smoke testing reports Digital photos (all files should follow the naming conventions suggested in the body of this document) Please note that it is necessary to provide a separate summary of defects file for each field activity performed in the service area. 5. Upon City s review of field data, errors or omissions noted will be flagged and reported to the Contractor s project manager by . The Contractor shall address these issues and resubmit the applicable information at no extra cost to the City. After the issues are addressed, the flags on the forms will be removed by the City. Thus, issues are tracked by the City until finally resolved. 6. The City may perform field verifications of work in a service area to verify the information on the inspection forms. If there are discrepancies between the original condition assessment by Contractor s crew and the re-inspected assets, the City will send an to the Contractor detailing the issues to be corrected. 1

2 Attachment A. Field Activity Protocol Condition Assessment Activities This section briefly describes the Phase I and II Condition Assessment activities and why they are performed. PHASE I - FIELD ACTIVITIES Smoke Testing: Smoke tests are carried out to identify potential sources of wet weather inflow within the basin. Defects identified by smoke testing potentially include broken or missing cleanout caps, holes in the ground, grease/blockage in the mainline, storm water cross-connections and defective plumbing. Results from smoke testing generally trigger Phase II field investigations such as CCTV inspections and dye testing. For instance, if smoke does not reach the entire stretch of pipe, the cause may stem from either a blockage, severe root intrusion, or a sagging pipe. In order to verify the cause, a CCTV inspection would then be scheduled. When smoke is observed emanating from a broken or missing cleanout cap or a manhole with potential for inflow during rain events, cleanout plugs and manhole inserts are installed, respectively. Figure 1-1 below illustrates how follow-up field activities are determined based on smoke testing results. Figure 1-1. Smoke Testing Results Decision Diagram Night Flow Isolation: Night flow isolations are carried out between midnight and 6:00 A.M. to identify and measure potential infiltration in each pipe segment. Night flow measurements are taken using a calibrated weir apparatus such as a Flo-Poke. All sewer segments with measured flows greater than or equal to 2,000 Gallons per Day per Inch Diameter-Mile ( GPD/IDM) of pipe are referred to Phase II field activity CCTV inspections. At the discretion of the City Project Manager, sections of pipe with readings less than 2,000 GPD/IDM can be referred for further evaluation should the field conditions lend to this measure. Figure 1-2 illustrates the decision making process following night flow isolation activities. 2

3 Attachment A. Field Activity Protocol Figure 1-2. Night Flow Isolation Results Decision Diagram Manhole Inspection: All manholes should be inspected according to NASSCO MACP guidelines. Defects identified during the manhole inspections are assigned MACP scores on a scale of 1-5. Manholes with one or more defects scored at 4 or higher should be flagged for further analysis and possible rehabilitation. Manholes with evidence of root intrusion are flagged for further analysis and possible rehabilitation, and when manholes with evidence of surcharging are noticed, the immediate downstream sewer segment is recommended for CCTV. Figure 1- below illustrates this process. Figure 1-. Manhole Inspection Results Decision Diagram.

4 PHASE II - FIELD ACTIVITIES Attachment A. Field Activity Protocol Dye Testing: Dye tests are performed in conjunction with mainline CCTV inspections wherever potentially significant inflow sources, or cross connections, are revealed during Phase I smoke testing procedures. These potential cross-connections and inflow sources range from a smoking storm drain to a hole in the ground. The CCTV camera is positioned in the pipe at the suspected inflow source in order to document the sections of pipe where dye water is observed entering the system. Whenever dye water is observed entering the system from a service connection, a Lateral CCTV inspection is scheduled to potentially identify and document that point of entry. Mainline CCTV Inspection: CCTV inspections are scheduled upon review of the results of the Phase I field activities in order to substantiate the results of these tests. An exception to this process is when a basin lies within a City s Strategic Growth Area (SGA), whereupon 100% of the collection system s piping is inspected by CCTV. The inspections are completed using NASSCO PACP guidelines with the appropriate PACP scores assigned. Particular emphasis is placed on the Structural and O&M defects with scores on a 1-5 scale. All sewer segments with one or more defects scored at 4 or higher in either the Structural or O&M category will be flagged for further analysis and possible rehabilitation. If the contractor observes major structural or O&M defects that could result in mainline failure or sanitary sewer overflow, then it should be reported to the City Project Manager promptly. This would include all grade 5 structural and O&M defects, such as collapsed pipe, objects intruding through wall, obstructions and other major defects. Should a mainline CCTV inspection be terminated for any reason, the contractor is expected to complete the inspection in reverse. If this is not possible or if the segment is inaccessible, it shall be flagged for further analysis regardless of the highest PACP score. Mainlines with evidence of root intrusion or grease build up are referred to the City s Root Control program and Hot Spot Cleaning program respectively. Lateral CCTV Inspection: This field activity is scheduled wherever potentially defective laterals are identified from smoke testing, manhole inspections or mainline CCTV. Defects are scored using a variation of the LACP defect scoring scale. Any lateral with at least one defect scored at 4 or higher in either the Structural or O&M category will be flagged for further analysis for possible rehabilitation. Laterals with evidence of root intrusion or grease will be flagged for further analysis and possible rehabilitation. Grade Grade Description Grade Definition 5 Immediate Attention Defects requiring immediate attention 4 Poor Severe defects that will become Grad 5 defects within the foreseeable future Fair Moderate defects that will continue to deteriorate 2 Good Defects that have not begun to deteriorate 1 Excellent Minor defects Table 1-1. PACP Defect Grade Descriptions 4

5 Attachment A. Field Activity Protocol Activities that follow Mainline and Lateral CCTV are illustrated in Figure 1-4 below. Figure 1-4. Post-CCTV Follow-up Activities Diagram 5

6 Attachment A. Field Activity Protocol Field Protocol and Data Collection PHASE I - FIELD ACTIVITIES Smoke Testing: All smoke testing will be conducted during dry-weather when low groundwater conditions exist and during low wind conditions. The sewer lines being smoke tested may be isolated by the use of plugs. The smoke test will require one smoke blower per 400 feet of pipe, with a maximum of 2 blowers (800 feet) per setup. Liquid, non-toxic smoke will be injected into the sanitary sewer lines. Smoke that escapes from the pipes and emerges above the ground will be recorded. The following guidelines shall be adhered to: The contractor shall use two blowers for tests including multiple line segments with a maximum combined total pipe length between 400 and 800 feet. The contractor can use one blower for tests containing multiple line segments with a combined total length of less than 400 feet. The contractor shall use two blowers for tests including a single segment with a total length greater than 400 feet. The contractor can conduct these tests without plugging the lines if using Engineer approved blowers and smoke systems. An example of a smoke test setup can be seen in Figure 1-5. The area being smoke tested is from C to U. Any defects observed along these line segments shall be recorded. Figure 1-5 Smoke Test Setup: One Blower over Two Line Segments (5 LF total) 6

7 Attachment A. Field Activity Protocol The data recorded during smoke testing shall include the following: 1. The field crew will record the locations for each smoke testing set-up and prepare a field sketch for each smoke test. Field sketches will include manhole numbers, pipe diameters, length of pipe, location of blower(s), location of plugs and street names. These sketches will be recorded on the standard City Smoke Testing Report form. For an example of a completed form, see Figure Digital images will be taken where smoke was observed, including manholes. For examples of field photos, please see Figure Provide a summary list of all potential defects and manholes where smoke was observed and will require follow-up field activities or manhole inserts. 4. Ensure that all defect photos show evidence of smoke. It is not acceptable to flag the defect and then return to take the photo. 5. Ensure that defect photos show an easily recognizable landmark in order to facilitate the location of the defect in the field after smoke testing. 6. Using a dry erase board provide markers in each smoke test picture that show the service area number, date, set-up number, crew member initials and defect number (see below). SERVICE AREA DATE SETUP No. CREW INITIALS DEFECT No. 7. Each photo shall be named using the following smoke testing photo naming convention:: o ST_245_Set1_1.jpg Where: ST Smoke Testing 245 Service Area number Set1 Setup No. 1 1 Photo No. 8. Each potential source of inflow will be evaluated to determine the potential for runoff to enter the sewer system (e.g. is the defect in a depressed area or is the manhole located in a depressed area where water ponds over the cover). Provide an estimate of the potential catchment area for each defect or manhole identified. The data recorded during smoke testing investigation should be, at a minimum: Date Defect Status Code Basin No. Source Type Code Contractor Smoking MH_ID if applicable Field Crew Smoke Code Blower Setup No. Catchment Area (sq ft) Blower Locations (MH_ID) Runoff Code Number of Defects Insert / Plug Size (in) Upstream MH Smoke Test Sketch ID file name Downstream MH (associated with each line) Result Code Defect photo file names associated Segment Length (LF) with each smoke tested line Street Address (Number and Street Any applicable comments Name) 7

8 Attachment A. Field Activity Protocol The accepted list of Source Type codes is shown on the Smoke Testing form in Figure 1-6. In addition to the Smoke Testing Reports (which will be completed for each setup), the contractor shall provide the City with a Smoke Testing data summary spreadsheet upon completion of work in each service area. To see an example of a completed Smoke Testing data summary spreadsheet, refer to the section titled Sample Data Sheets at the end of this document. Figure 1-6. Example of a filled out Smoke Testing form Figure 1-7. Smoke Testing Photo Examples 8

9 Attachment A. Field Activity Protocol Night Flow Isolation: All night flow isolation testing will be conducted during high groundwater periods and between the hours of 12 midnight through 6 AM. 1. Night flow isolation will begin at the manhole located closest to the Service Area pump station. 2. Night flow measurements will be taken first at a 10 minute interval and followed by a second reading at a 20 minute interval. If during the test the readings do not indicate a stable flow then additional readings will be taken until there is a stable flow condition.. If flow in the segment is 2000 GPD/IDMGPD/IDM or greater, the next upstream segment should be measured in the way described in Step 2. The field crews should continue to move upstream through the service area until a flow of less than 2000 GPD/IDMGPD/IDM is reached. Regardless of the method used, the field crew shall record the location of flow measurements and clearly depict each night flow isolation test location on a field summary map. Field summary maps will include manhole numbers, pipe diameters, length of pipe, location of flow measurement, location of plugs (if applicable) and street names. Field crews will fill out the Night Flow Isolation Report an example of which can be seen in the section titled Sample Data Sheets at the end of this document. The data recorded during night flow isolations should be, at a minimum: Basin No. Contractor Field Crew Date Upstream MH Downstream MH Street Number Street Name Diameter (in) Setup No. Isolated Segment Length (LF) NFI Time GPD 10 Min GPD 20 Min Total GPD (Net) Total GPD (Cumulative) GPD/IDM Any applicable comments Manhole Inspection: Manhole inspection data will be used to evaluate the condition of the manhole structure and its component parts: cover, frame, cone, walls, base, and pipe connections. The field crews will inspect and asses manholes using the MACP compliant City standard Manhole Field Inspection Form. A snapshot of the current standard form is shown on Figure 1-9. After recording the manhole ID, the inspector s name, and the date and time of the inspection at the top of the form, all remaining sections of the Manhole Field Inspection Form will be completed by checking the appropriate boxes or using free-hand descriptions where required. The following procedures shall be adhered to during the inspection process: 1. Include Inspector s MACP certification number on form. 2. Provide nearest street address to manhole location. If there is no address available, provide an easily recognizable landmark as reference.. The data recorded during manhole inspection includes, but is not limited to, manhole cover type, type of frame, manhole depth, type of construction used for manhole walls, and a list of identified defects using MACP codes. 4. Manhole down pictures shall capture the entire view from the manhole corbel to invert and a close up picture of the frame and cover. 5. A pole camera shall be used to take pictures of each influent pipe, any defects within the manhole and the effluent pipe. 9

10 Attachment A. Field Activity Protocol 6. Use a dry erase board to include service area number, date, crew initials and manhole number in landscape photo (see below). SERVICE AREA DATE CREW INITIALS MH No. 7. A detailed inspection record will be input into the manhole inspection database and include color photographs showing the manhole, the surrounding area, and views within the connecting conduits. Each photo will be named using an established photo naming convention similar to the following: o U_land.jpg o U_down.jpg o U_defect1.jpg o U_defect2.jpg o U_pipe1.jpg o U_pipe2.jpg Where: U City Standard manhole number Land landscape photo Down photo taken down into the manhole Defect1, 2 are defects observed while inspecting manhole Pipe1, 2, pipe number that corresponds to the pipe number on the form 8. The manhole location will be evaluated to determine the potential for runoff to enter through the manhole cover and frame (e.g. does the manhole sit in a depressed area where water ponds over the cover). Provide an estimate of the potential runoff area for the inspected manhole. Based on the information collected on the Manhole Field Inspection Forms the electronic database will be completed in its entirety using the standard pull-down menus and free-hand descriptions where required. 10

11 11 Attachment A. Field Activity Protocol

12 Attachment A. Field Activity Protocol Figure 1-9 Manhole Inspection Form (page 2 of 2) The data recorded during manhole inspections should be, at a minimum: Date Contractor Manhole ID Street Name and Number MH Depth (ft) Barrel Diameter (in) No. of Pipes No. of Defects MACP Score Observed Infiltration (Y/N) MACP Code: where multiple defects are presented, record the highest score Evidence of Surcharge (Y/N) Surcharge (ft above invert) Dust cover (Y/N) 12

13 Inflow Protection (Y/N) Necessary Insert Measurement (in) Photo file names associated with each manhole Potential Surface Ponding (sq ft) Any applicable comments PHASE II - FIELD ACTIVITIES Dyed Water Testing: Dyed water flooding will be performed with CCTV inspection to verify locations of infiltration. Dyed water tracing will be performed with CCTV inspection to verify inflow sources including downspouts, area drains, patio drains, window well drains, stairwell drains and driveway drains. These sources may not always be detected with smoke testing due to service lateral traps or clogged pipes. Dye tests shall be recorded as shown in the Dye Testing Report Form (Figure 1-11) and shall include photos (Figure 1-10) depicting the dye test location and results. Also, include CCTV inspection forms and still photos showing results of the dye tests. The data recorded during dyed water testing should be, at a minimum: Date Basin No. Contractor Field Crew Test No. Description of Test Purpose Upstream MH Downstream MH Street Number Street Name Diameter (in) Material Shape Length (LF) CCTV (Y/N) Positive or PACP I/I Category Estimated Catchment Area (sq ft) Estimated I/I (gpm) Sketch File Name Photo file names associated with each test Any applicable comments In addition to dye testing forms (seen in figure 1-11 below), a Dye Water Testing summary spreadsheet shall be provided to the City by the contractor. To see a complete sample Dye Water Testing summary data sheet, refer to section Sample Data Sheets at the end of this document. 1

14 Figure Sample Dye Testing Photos 14

15 Figure Sample Dye Testing Report Form 15

16 Mainline Closed Circuit Television (CCTV) Inspection: The contractor shall use PACP standards for close inspection of gravity mains. The data recorded during CCTV inspection will include video footage generated as the camera rolls through sewer mains. For each TV-inspected pipe, still frames will be captured as JPEG images. The contractor must clean the sewer lines prior to CCTV inspection in order to view and record the internal conditions of the lines. Upon conclusion of the CCTV inspection, the contractor shall convert the information gathered, using NEZTEK, into the Hansen IMS platform. The data recorded during mainline CCTV inspections should be, at a minimum: Date CCTV Footage (LF) Basin No. No. of O&M Defects Contractor Overall PACP O&M Rating Field Crew Highest O&M Defect Recorded Upstream MH No. of Structural Defects Downstream MH Overall PACP Structural Rating Diameter (in) Highest Structural Defect Recorded Material PACP Score Shape Length (LF) Any applicable comments Lateral Closed Circuit Television (CCTV) Inspection: The contractor shall use LACP standards for close inspection of service connections. The data recorded during CCTV inspection will include video footage generated using a push camera. For each TV-inspected pipe, still frames will be captured as JPEG images. Upon conclusion of the CCTV inspection, the contractor shall convert the information gathered, using NEZTEK, into the Hansen IMS platform. The data recorded during lateral CCTV inspections should be, at a minimum: Date Shape length (LF) Basin No. CCTV Footage (LF) Contractor No. of O&M Defects Field Crew Overall O&M Rating Upstream MH Highest O&M Defect Recorded Downstream MH No. of Structural Defects Cleanout ID Overall Structural Rating Street Number Highest Structural Defect Recorded Street Name PACP Score Diameter Any applicable comments Material Installation of Manhole Inserts: Manhole inserts will be installed, at the direction of the City, where smoke is noticed emanating from manhole covers during smoke testing field activities. The Contractor shall ensure that the frame and cover is appropriately measured prior to ordering the insert to minimize the risk of installing the incorrect size insert. Priority is given to manholes that are located in low-lying or flood prone areas. City approved manhole Inserts include: 19" Tetherlok Stainless Steel Rainstopper NOR; 22" Rainstopper Model WH; 19" Lockdry w/extended lip to fit 21 /8" diameter openings and; 22" Lockdry. 16

17 Rain stopper inserts are produced by Southwestern Packing and Seals, and Lockdry inserts are produced by Barton Southern Company. Each manhole insert shall be equipped with a welded handle, not a stainless steel cable tether attached by rivet. A Manhole Insert Installation summary spreadsheet shall be provided to the City by the contractor for each service area upon completion of work. To see a complete sample Manhole Insert Installation summary spreadsheet, refer to section Sample Data Sheets at the end of this document. Installation of Mainline Cleanout Plugs and/or Property Line Cleanout Caps: Mainline cleanout plugs and/or property line cleanout caps will be installed, at the direction of the City, where smoke is noticed emanating from cleanouts and there is a missing/broken cap/plug noticed during smoke testing field activities. The Contractor shall properly measure the cleanout and install the appropriate size plug/cap. Cleanout plugs/caps that are installed shall be Gripper Mechanical Plugs, manufactured by Cherne Industries, A Cleanout Cap Installation summary spreadsheet shall be provided to the City by the contractor for each service area upon completion of work. To see a complete sample Cleanout Cap Installation summary spreadsheet, refer to section Sample Data Sheets at the end of this document. 17

18 Sample Data Sheets 18

19 Table 1 Sample Smoke Test Data Summary Spreadsheet Smoke Test Completion Date Contractor Smoke Testing Crew Service Area Number Blower Setup Number Defect Number Blower Location(s) (MH_ID) Upstream MH Downstream MH Segment Length (LF) Street No. Street Name Result Code Defect Status (public/private) Source Type Smoking MH_ID (if applicable) Smoke Code Catchment Area (sq.ft) Runoff Code Insert/Plug Size (in.) Smoke Test Sketch ID Defect Photo ID Comments 10/12/ A U U PS CR ST_ U_PS 125.pdf 10/12/ A U U U 97 10/12/ A U M U /12/ T U U M /12/ A M M U /12/ A M M U CR Lake Lake 10/12/ A U M U 40 CR 10/12/ A U U M 164 CR 10/12/ A M M U /12/ A M U M /12/ A U C U /12/ A U N U /12/ A U N U /12/ A U N U 120 CRES CRES 10/12/ A M M M 128 CR 10/11/ A M M M /11/ A M M M /11/ A M M M CRES CRES CRES 1 1 BCO 1 1 MCC 1 2 BCO 1 1 BCO 1 1 BCO 1 1 HOL 1 1 BCO 1 1 BCO L09F16 L09F17 L08F66 L09F118 L09F115 L09F126 L09F124 L09F ST_ U_ ST_ M_ ST_ U_ ST_ M_ ST_ M_ ST_ M_ ST_ U_ ST_ M_ ST_ U_ ST_ C_ ST_ N_ ST_ N_ ST_ N_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ M_977 CRES_BCO M_984 CRES_MCC C_1121 _BCO N_1125 _BCO N_1141 _BCO M_960 CRES_HOL M_956 CRES_BCO M_9 CRES_BCO2 Replaced broken Replaced missing Private clean-out-did not replace plug Replaced broken Replaced broken Soil sidewalk and driveway Replaced broken Replaced broken 19

20 Smoke Test Completion Date Contractor Smoke Testing Crew Service Area Number Blower Setup Number Defect Number Blower Location(s) (MH_ID) Upstream MH Downstream MH Segment Length (LF) 10/11/ A M M M /11/ A M M M /11/ A U U M 12 10/11/ A U U U 46 10/11/ A U M U /11/ A U N U 14 10/11/ A U N U /11/ A U N U /12/ T M M U /12/ T M M M /12/ T M M M /12/ T M M M /12/ T M M M 72 10/12/ T M M M /12/ T N N M /12/ T U U U Street No. Street Name CRES CRES CRES PL Lake Lake Lake Lake Lake Lake Lake Adanka LN Result Code Defect Status (public/private) Source Type 1 1 BCO 1 1 MCC 1 1 MCC 1 1 MCC 1 1 MCC 1 1 BCO Smoking MH_ID (if applicable) L09F120 L09F119 L09F179 L09F1181 L09F17 L09F191 Smoke Code Catchment Area (sq.ft) Runoff Code Insert/Plug Size (in.) Smoke Test Sketch ID ST_ M_ ST_ M_ ST_ U_ ST_ U_ ST_ M_ ST_ N_ ST_ N_ ST_ N_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ ST_ N_ ST_ U_ Defect Photo ID M_948 CRES_BCO M_925 CRES_MCC M_1169 Lake _MCC M_1160 Lake _MCC M_1209 Lake _MCC U_909 Adanka LN_BCO1 Comments Replaced broken clean-out w/ " plug Replaced missing clean-out w/ " plug Replaced missing Replaced missing clean-out w/ " plug Replaced missing Could not remove old cap-did not replace clean-out plug 10/11/ JM N U U BCO L09F ST_ U_ U_1208 _BCO1 Replaced broken clean-out w/ " plug 10/12/ T U U U MCC L09F ST_ U_ U_1205 _MCC1 Clean-out below grade-did not replace plug 20

21 Smoke Test Completion Date Contractor Smoke Testing Crew Service Area Number Blower Setup Number Defect Number Blower Location(s) (MH_ID) Upstream MH Downstream MH Segment Length (LF) 10/12/ T U U U /11/ JM M M U /11/ JM M M U /11/ JM N N M /11/ JM M N U 67 10/12/ T N N U /11/ A U U M 14 10/11/ A U M U /11/ A U M U /11/ A U M U /11/ A U M U /11/ A M M M /11/ A M M M /12/ A U N U 27 10/11/2010 ST_ N_ ST_P- L08F65_ ADS- AC 125 A M P-L08F M 6 Street No. Street Name S Rd S Rd S Rd S Rd S Rd S Rd Rd S Result Code Defect Status (public/private) Source Type 1 1 BCO 1 1 BCO 1 1 BCO 1 1 BCO Smoking MH_ID (if applicable) L09F197 L09F1119 L09F1121 L09F1107 Smoke Code Catchment Area (sq.ft) Runoff Code Insert/Plug Size (in.) BCO L09F MCC L08F MCC N/A MCC N/A MCC N/A MCC N/A MCC L08F Smoke Test Sketch ID ST_ U_ ST_ M_ ST_ M_ ST_ N_ ST_ N_ ST_ N_ ST_ U_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ ST_ M_ Defect Photo ID U_1212 _BCO M_127 _BCO M_1229 _BCO N_1252 _BCO N_1177 _BCO M_1129 S Rd_MCC M_1141 S Rd_MCC M_1141 S Rd_MCC M_1145 S Rd_MCC M_1105 S Rd_MCC M_1101 S Rd_MCC2 Comments Did not replace clean-out plug - standard size plug does not fit Replaced broken Replaced broken Replaced broken Replaced broken Replaced missing Private clean-out-did not replace plug Private clean-out-did not replace plug Replaced missing Replaced missing Replaced missing 21

22 Table 2 Sample Night Flow Isolation Report NFI Completion Date 09/17/2010 Contractor NFI ADS- Crew Service Area Setup No. UpStream MH DownStream MH Street Number Street Name Diameter (in.) Isolated Segment Length (LF) NFI Time GPD 10 Min. GPD 20 Min. Total Feet (Cumulative) Total GPD (Cumulative) GPD/IDM (Cumulative) U PS CR Total GPD (Net) GPD/IDM Comments CANNOT INSTALL WEIR IN PUMP STATION WET WELL. 09/17/ AR U U 992 CR : /17/ AR M U 1112 Lake : /19/ AR U M 1128 Lake : /17/ AR M U 969 CR : /17/ AR M U 99 CR : /2/ GW U M : /2/ GW M U : /20/ AR U M : /20/ AR C U : /20/ AR N U : /2/ GW N U : /20/ AC M M 95 CR : /20/ AC M M 97 CR : /20/ AC M M 91 CR : /20/ AC U M : /20/ AC U U : /20/ AC M U : /20/ AC N U : /20/ AC N U 1108 PL : /20/ AC N U : /20/ AR M U 1149 Lake : /20/ AR M M 1172 Lake : /20/ AR M M 119 Lake : /20/ AR M M 1201 Lake : /20/ AR M M 1217 Lake : /20/ AR N M 1208 Lake : /20/ AR U U : /20/ AR U U : /20/ AR M U : UPSTREAM READINGS EXCEED CUMULATIVE FLOW. Possible commercial connections. 22

23 NFI Completion Date Contractor NFI ADS- Crew Service Area Setup No. UpStream MH DownStream MH Street Number Street Name Diameter (in.) Isolated Segment Length (LF) NFI Time GPD 10 Min. GPD 20 Min. Total Feet (Cumulative) Total GPD (Cumulative) GPD/IDM (Cumulative) 09/20/ AR N M : /20/ AR N U : /20/ AR N U : /20/ AC U M : /20/ AC M U Off : /20/ AC M M 1101 Off : /2/ GW N U : /2/ GW005 8" Influent N : /20/ AC00 P-L08F M 1101 Off : Total GPD (Net) GPD/IDM Comments 8" INFLUENT LINE NOT ON MAP 2

24 Table Sample Dye Water Testing Summary Spreadsheet Dye Test Completion Date Contractor Crew Service Area Test No. Description of Test Purpose Upstream MH Downstream MH Street Number Street Name Diameter (in.) Material Shape Length (LF) CCTV? (Y/N) Positive or PACP I/I Category Estimated Catchment Area (sq. ft) I/I Estimate (gpm) Sketch Filename (.pdf) Photos Test Result Comments 6/8/ To verify potential inflow through area drain at 4921 Curling Road M U 4921 Curling Road 8 VCP 250 Y None M_AD.pdf M_4921 Curling Road_1_L.jpg M_4921 Curling Road_1_DN.jpg Dye test was negative as no dye water was identified entering mainline sewer. 24

25 Table 4 Manhole Insert Installation Summary Spreadsheet Insert Installation Date Contractor Installation Crew Service Area Manhole ID Street Number Street Name Need MH Insert? (Y/N) MH Insert Installed? (Y/N) MH Insert Size (in.) Comments 11/05/ U 991 KELA CR Y Y NOR 11/05/ U 992 KELA CR Y Y NOR 11/05/ M 1112 BIRDNECK LAKE Y Y NOR 11/05/ U 1128 BIRDNECK LAKE Y Y NOR 11/05/ M 972 KELA CR Y Y NOR 11/05/ M 99 KELA CR Y Y NOR 11/05/ U 1165 TREEFERN Y Y NOR 11/05/ M 1152 TREEFERN Y Y NOR 11/05/ U 116 TREEFERN Y Y NOR 11/05/ N 11 TREEFERN Y Y NOR 11/05/ N 1166 TREEFERN Y Y NOR 11/05/ M 96 KELA CR Y Y NOR 11/05/ M 97 KELA CR Y Y NOR 11/05/ M 91 KELA CR Y Y NOR 11/05/ U INTERSECTION OF TREEFERN AND KELA CR Y Y 2.50 T 25

26 Insert Installation Date Contractor Installation Crew Service Area Manhole ID Street Number Street Name Need MH Insert? (Y/N) MH Insert Installed? (Y/N) MH Insert Size (in.) Comments 11/05/ U INTERSECTION OF TREEFERN AND TREEFERN PL Y Y NOR 11/05/ M 1097 TREEFERN Y Y 2.50 T 11/05/ N 1080 TREEFERN Y Y NOR 11/05/ N 1112 TREEFERN PL Y Y NOR 11/05/ N 1120 TREEFERN Y Y NOR 11/05/ M 1149 BIRDNECK LAKE Y Y NOR 11/05/ M 1172 BIRDNECK LAKE Y Y NOR 11/05/ M 1186 BIRDNECK LAKE Y Y NOR 11/05/ M 1201 BIRDNECK LAKE Y Y NOR 11/05/ M 1217 BIRDNECK LAKE Y Y NOR 11/06/ N 1220 BIRDNECK LAKE Y Y NOR 11/07/ U 1221 TREEFERN Y Y NOR 11/08/ U 1245 TREEFERN Y Y NOR 11/09/ M 1270 TREEFERN Y Y NOR 11/10/ N 1220 TREEFERN Y Y NOR 11/11/ N 1177 TREEFERN Y Y NOR 26

27 Insert Installation Date Contractor Installation Crew Service Area Manhole ID Street Number Street Name Need MH Insert? (Y/N) MH Insert Installed? (Y/N) MH Insert Size (in.) Comments 11/12/ N 1088 TREEFERN Y Y NOR 11/1/ U 1080 TREEFERN Y Y NOR 11/14/ M N CNL 11/15/ M 111 BEHIND 1101 BIRDNECK RD SOUTH Y Y NOR 11/16/ N 1165 TREEFERN Y Y NOR 27

28 Table 5 Cleanout Cap Installation Summary Spreadsheet Cleanout Cap Installation Date Contractor Installation Crew Service Area Upstream MH Downstream MH Cleanout ID Street Number Street Name Need Cleanout Cap? (Y/N) Cap Size (in.) Cap Installed? (Y/N) Comments 10/11/ M U L08F Rd S Y 4 Y Replaced missing 10/11/ M M L08F Rd S Y 4 Y Replaced missing 10/11/ N M L09F Y 4 Y Replaced broken 10/11/ M U L09F Y 4 Y Replaced broken 10/11/ M U L09F Y 4 Y Replaced broken 10/12/ U U L09F Y N Clean-out below grade-did not replace plug 10/12/ N U L09F Y 4 Y Replaced broken 10/12/ M M L09F Lake Y 4 Y Replaced missing 10/12/ N U L09F Y 4 Y Replaced broken 10/12/ M M L09F Lake Y Y Replaced missing clean-out w/ " plug 10/11/ M M L09F CR Y Y Replaced missing clean-out w/ " plug 10/11/ M M L09F CR Y Y Replaced broken clean-out w/ " plug 10/11/ M M L09F12 9 CR Y 4 Y Replaced broken 10/11/ M M L09F CR Y 4 Y Replaced broken 10/12/ M U L09F CR Y 4 Y Replaced broken 28

29 Cleanout Cap Installation Date Contractor Installation Crew Service Area Upstream MH Downstream MH Cleanout ID Street Number Street Name Need Cleanout Cap? (Y/N) Cap Size (in.) Cap Installed? (Y/N) Comments 10/12/ M U L09F CR Y 4 Y Replaced missing 10/12/ N U L09F Y 4 Y Replaced broken 10/12/ M M L09F Lake Y 4 Y Replaced missing 10/12/ U U L09F Adanka LN Y N Could not remove old cap-did not replace clean-out plug 10/11/ U U L09F Y Y Replaced broken clean-out w/ " plug 10/12/ U U L09F Y N Did not replace clean-out plug - standard size plug does not fit 10/11/ M U N/A 1145 Rd S Y 4 Y Replaced missing 10/11/ M M N/A 1105 Rd S Y 4 Y Replaced missing 29