The URL can be used to link to this page

Home My WebLink AboutNC0085812_Rpt Ltr_20220811mg and Video Assessment er Mains & Laterals Grassy Branch Collection system FY 2021 - 2022 PREPARED FOR UNIONCOUNTY WATER H!DROSTRUCTURES, PA 126 Commerce Court Pittsboro, NC 27312 919.542.5002 CONDITION ASSESSMENT REPORT Grassy Branch Collection System Union County Water June 2022 I. INTRODUCTION The Grassy Branch Sewer Collection System has been a concern for Union County Water for a number of years due to the Grassy Branch Water Reclamation Facility (WRF) frequently exceeding its capacity. Dating back to 2016, the County has conducted several flow monitoring studies to quantify the amount of infiltration and inflow (I -I) entering the system during periods of wet weather. It has also performed several phases of sewer system evaluation activities including smoke testing, manhole inspections and iTracker micro -detection studies to identify the exact sources of I -I. It has subsequently repaired any of these defects that were identified. At the present time, the County is confident that the problem is simply a lack of capacity since the average dry weather daily flow rate is very close to the treatment capacity of the Grassy Branch WRF. Even minor amounts of kiwi!! cause the WRF to exceed its capacity and potentially result in sanitary sewer overflows (SSOs) in the system. Despite this, the County decided to perform CCTV inspections of all sewer mains and laterals within the Grassy Branch collection system to identify any defects that could potentially allow I-1 to enter the system. This report presents the findings of these CCTV inspections. The information gathered during the study has been used to identify specific defects within the system and develop repair/rehabilitation recommendations with cost estimates in order to assist the County with reducing I/1 into the collection system. II. GRASSY BRANCH COLLECTION SYSTEM INVENTORY The Grassy Branch collection system ends at the WRF just north of Old Fish Road, runs parallel to Grassy Branch, crosses Unionville Road and Sikes Mill Road to Piedmont High School and Middle School. (This system also receives sewer via a force main from Unionville Elementary School) A "Sewer Main Priority Rating Map" is included in Appendix A and shows the full extent of the gravity collection system and study area. This collection system includes approximately 30,868 linear feet of gravity sewer. The mains are a mix of polyvinyl chloride (PVC) and ductile iron pipe (DIP). Table 1, below, lists the footage of each diameter and material of pipe found in the study area. TABLE 1 — SUMMARY OF PIPING Pipe Diameter / Material Total Footage (FT) 6-inch PVC 739 8-inch PVC 18,608 Page 1 of 14 Grassy Branch — Condition Assessment Report Union County Water Pipe Diameter / Material Total Footage (FT) 8-inch DIP 2907 12-inch DIP 474 12-inch PVC 8140 III. RESULTS OF FIELD INVESTIGATIONS A. Cleaning and Internal CCTV Inspection All lines were cleaned using a high -velocity jet / vacuum truck in order to remove debris and provide an unobstructed view of the pipe surface. After cleaning, the lines were then visually inspected by means of a closed-circuit television (CCTV) system, which includes a self-propelled tractor and camera unit. The camera is coupled with an inspection system containing both digital video recorders, footage counter and a laptop equipped with IT Pipes video inspection reporting software. Service laterals were inspected using a special system that "launches" a smaller camera up into the lateral from the main. For each mainline section or lateral, an inspection log was prepared showing the location of any structural defects, offset or separated joints, points of infiltration, roots, etc. The log also shows the location of all service connections and upstream and downstream manhole numbers. The complete inspection was also recorded on videotape and captured digitally on MPEG files. A copy of the inspection logs is contained in Appendix B. Digital videos and digital inspection logs for each line segment are included on Appendix D (thumb drive). Once all the lines were cleaned and inspected, the next step was to evaluate each line and prioritize the lines according to condition severity. Based on our evaluations, each defect was assigned a priority rating from 1 to 5. The priority rating system uses the NASSCO Pipeline Assessment and Certification Program (PACP) and Lateral Assessment Certification Program (LACP) methodology described below. • Grade 5 — Defects require immediate attention. Pipe has failed or will likely fail within the next five years • Grade 4 — Severe defects that will become Grade 5 within the foreseeable future. • Grade 3 — Moderate defects that will continue to deteriorate • Grade 2 — Defects that have not begun to deteriorate. • Grade 1 — Minor defects NASSCO recognizes two families of defects: structural defects and operation and maintenance (O&M) defects. Structural defects are various types of defects within the structure of the pipe including cracks, fractures, broken pipe, collapsed pipe, offset or separated joints, surface damage from expose to hydrogen sulfide gas, etc. Operation and maintenance defects include deposits (grease, sand), roots, infiltration, obstructions, etc. that affect the system's ability to operate properly. NASSCO also assigns each structural and O&M defect with a grade rating corresponding to the severity of the defect (5 the most severe and 1 the least severe). A grade score is Page 2 of 14 Grassy Branch — Condition Assessment Report Union County Water calculated by multiplying the grade rating by the number of occurrences of that grade identified throughout the pipe. The grade scores are summed in their appropriate families (structural and O&M) to calculate the structural defect rating and O&M defect rating. The overall rating is the sum of structural and O&M defect ratings. Each pipe is also assigned a quick rating, which is a four -digit number showing the number of occurrences for the two highest severity grades occurring in that pipe (the number is displayed with the grade rating first followed by the number of occurrences). For example, if the pipe inspected has two grade 5 defects and six grade 4 defects the quick rating would be 5246. Hydrostructures assigns a priority ranking based on the severity of the worst defect contained in the line. Therefore, a line containing a structural collapse (grade 5) would be scored as a priority 5. The results of the priority rating process are provided in the table below. Zero (0) priority 5, one (1) priority 4, thirty-four (34) priority 3, one (1) priority 2, and ninety- one (91) priority 1 mainline pipe sections were identified in the collection system (Table 2 below). A "Sewer Main Priority Rating Map" is provided in Appendix A and shows the location and priority rating for all mainlines inspected as part of this evaluation. CCTV logs for all pipe segments inspected on the system are included in Appendix B. TABLE 2 — MAINLINE PRIORITY RATING SUMMARY Priority Rating Quantity Priority 5 Priority 4 Priority 3 Priority 2 Priority 1 0 1 34 1 91 Table 3: CCTV Inspection and Condition Summary Spreadsheet on the following pages summarizes the results from the CCTV inspections and includes the structural and O&M defects discussed above for each sewer main. Data for each manhole -to -manhole section is presented as follows: • Sewer line identification number • Upstream and downstream manhole number • Physical location description • Pipe material • Pipe diameter • Surveyed pipe length • Priority Rating • Rehabilitation Recommendations Page 3 of 14 Grassy Branch — Condition Assessment Report Union County Water Table 3: CCTV Inspection and Condition Summary Spreadsheet (PACP) Sewer Line I.D. Number Upstream Manhole No. ir Downstream Manhole No. MrPipe Location Pipe Material Diameter (in.) Surveyed Length (ft.) Priority Rating Rehabilitation Recommendations 16021 13827 13828 SMITHFIELD DR PVC 8 224.4 1 None 16022 13828 13846 SMITHFIELD DR PVC 8 235.2 1 None 16020 13857 13846 SMITHFIELD DR DIP 8 326.1 1 None 16023 13846 13845 SMITHFIELD DR PVC 8 68.2 1 None 16248 SF340 13845 SMITHFIELD DR DIP 8 21.9 1 None 16013 13843 13844 SMITHFIELD DR DIP 8 404 3 None 16012 13842 13843 SMITHFIELD DR PVC 8 212 1 None 16008 13961 13841 CHRISTIAN CRT PVC 8 163.3 1 None 16247 SF339 13961 CHRISTIAN CRT PVC 8 14.4 1 None 16010 13840 13841 SMITHFIELD DR DIP 8 134.5 1 None 16011 13841 13842 SMITHFIELD DR DIP 8 122.4 1 None 16009 13839 13840 SMITHFIELD DR PVC 8 149.4 1 None 16014 13844 13847 CORI JON DR PVC 8 173.5 1 None 16015 13847 13848 CORIJON DR PVC 6 282.5 1 None 16016 13848 13960 CORI JON DR PVC 8 101.5 3 None 16018 13849 13960 CORI JON DR PVC 6 155 _ None 16019 13960 13853 CORI JON DR PVC 8 213.8 1 None 16017 13850 13849 CORI JON DR PVC 8 144.4 1 None 16038 13835 13834 SMITHFIELD DR PVC 8 325.5 I None 16039 13834 13851 SMITHFIELD DR PVC 8 175.3 1 None 16030 13829 13830 SMITHFIELD DR PVC 8 390.8 1 None 16031 13830 13831 SMITHFIELD DR PVC 8 400 1 None 16032 13831 13832 SMITHFIELD DR PVC 8 110.3 None 16033 13832 13833 SMITHFIELD DR PVC 8 94.8 None 16029 13856 13833 SMITHFIELD DR PVC 8 321.2 1 11 None 4061 7533 7534 LOXDALE FARM DR PVC 8 310.2 1 None 16249 CO874 7533 LOXDALE FARM DR PVC 8 41.7 kr 1 None 4073 7540 7534 HENRY SMITH RD PVC 8 252.1 1. None 4072 7539 7540 HENRY SMITH RD PVC 8 86 1 None 4070 7538 7539 HENRY SMITH RD PVC 8 68.3 1 None 4063 7534 7535 LOXDALE FARM DR PVC 8 306.2 IL 1 None 4065 7535 7536 LOXDALE FARM DR PVC 8 137.4 1 None 4067 7536 7537 LOXDALE FARM RD PVC 8 421 1. None 4074 7541 7537 ERINDALE CRT PVC 8 300.4 1 None 16250 CO7541 7541 ERINDALE CRT PVC 8 56.4 1 None 4075 7542 7537 LOXDALE FARMS DR PVC 8 424.7 1 None 4068 7537 7530 ERINDALE CRT PVC 8 426.1 1 Inject Upstream Pipe Connection. MH 7537, two runners. 4057 7531 7530 FALLING LEAF CRT PVC 8 55.8 1 None 4059 7532 7530 FALLING LEAF CRT PVC 8 203.6 1 None 4058 7530 PS7530 FALLING LEAF CRT PVC 8 265.6 1 None 4909 2783 2781 SIKES MILL RD DIP 8 374.7 3 None 4910 2781 2780 SIKES MILL RD PVC 8 422.1 3 None 4913 2784 2778 SIKES MILL RD PVC 8 425.7 4 Install Lateral Seal @46'. Runner between lateral & mainline. 4911 2780 2784 SIKES MILL RD ZZZ 8 395 3 None 4915 2778 2779 SIKES MILL RD PVC 8 167 3 Sag. No repair needed. 4917 2779 2777 SIKES MILL RD PVC 8 206.8 , i None 4919 2777 2776 SIKES MILL RD ZZZ 8 200.6 1 None 4921 2776 2775 SIKES MILL RD ZZZ 8 76 3 None 4921$ 2776 2775 SIKES MILL RD ZZZ 8 44.4 3 None 4923 2775 2764 SIKES MILL RD PVC 8 426.2 1 None 8775 i 2764 7543 SIKES MILL RD PVC 8 267.2 3 None 8776 7543 2774 SIKES MILL RD PVC 8 127.7 1 None 4939 2768 2767 UNIONVILLE RD PVC 8 264.6 3 None 4941 2767 2766 UNIONVILLE RD PVC 6 301.1 1 None 4943 2766 2765 UNIONVILLE RD PVC 8 291.1 3 None 4945 2765 2762 UNIONVILLE RD DIP 8 102.5 3 nstall 4' Sectional Liner @ 43'. Dripper at joint between DIP & PVC 4949 2761 2763 UNIONVILLE RD PVC 8 404.9 3 None 16041 13858 13956 RUSHING BENTON RD PVC 8 170.3 3 None 16042 13956 13957 RUSHING BENTON RD PVC 8 312.1 1 None 16043 13957 13958 RUSHING BENTON RD PVC 8 392.4 1 None 16044 13958 13959 RUSHING BENTON RD PVC 8 399.2 1 None 16045 13959 13951 RUSHING BENTON RD PVC 8 215.3 1 None Sewer Line I.D. Number Upstream Manhole No. Downstream Manhole No. Location Pipe Material Pipe Diameter (in.) Surveyed Length (ft.) Priority Rating Rehabilitation Recommendations 16046 13951 13952 RUSHING BENTON RD DIP 8 105.4 2 None 16047 13952 13953 RUSHING BENTON RD PVC 8 406.6 1 None 16048 13953 13954 RUSHING BENTON RD PVC 8 165.2 1 None 16049 13954 13955 RUSHING BENTON RD PVC 8 153 1 None 16050 13955 13948 RUSHING BENTON RD PVC 8 390.4 1 None 16051 13948 13949 RUSHING BENTON RD PVC 8 161.6 ] None 16052 13949 13950 RUSHING BENTON RD PVC 8 133.7 3 None 4951 2763 2760 UNIONVILLE RD DIP 8 387.2 3 None 4953 2760 2759 UNIONVILLE RD DIP 8 87 3 None 4955 2759 2758 UNIONVILLE RD PVC 8 114.4 3 None 4957 2758 2757 UNIONVILLE RD PVC 8 174.7 3 None 4959 2757 2756 UNIONVILLE RD PVC 8 256.8 3 None 4961 2756 2755 UNIONVILLE RD PVC 8 142.6 3 None 16053 2755 13950 UNIONVILLE RD DIP 8 156.7 3 Sag. No Repair Needed 4963 13950 2754 UNIONVILLE RD PVC 12 167.3 1 None 4965 2754 2753 UNIONVILLE RD PVC 12 418.3 1 None 4967 2753 2752 UNIONVILLE RD PVC 12 375.7 F 1 None 4969 2752 2751 UNIONVILLE RD PVC 12 300.3 1 None 4971 2751 2750 UNIONVILLE RD PVC 12 302.3 3 None 4973 2750 2749 UNIONVILLE RD PVC 12 362.5 3 None 4975 2749 2748 UNIONVILLE RD PVC 12 397.8 1 None 4977 2748 2747 UNIONVILLE RD PVC 12 233.7 1 None 4981 2746 2745 CLONTZ LONG RD PVC 12 223.5 I None 4983 2745 2744 CLONTZ LONG RD PVC 12 428 1 None 4979 2747 2746 CLOTZ LONG RD PVC 12 232.2 1 None 4985 2744 2743 CLONTZ LONG RD PVC 12 316.5 1 None 4987 2743 2742 CLONTZ LONG RD PVC 12 402.4 1 None 4989 2742 2741 CLONTZ LONG RD PVC 12 277.8 1 None 8777 2741 7544 CLONTZ LONG RD PVC 12 72.2 1 None 8778 7544 2740 CLONTZ LONG RD PVC 12 356.5 1 None 4993 2740 2739 CLONTZ LONG RD PVC 12 427.7 1 None 4994 2739 2738 CLONTZ LONG RD PVC 12 233.1 1 None 8688 2738 2737 CLONTZ LONG RD PVC 12 85 1 None 8689 2737 2736 CLONTZ LONG RD PVC 12 93 1 None 8687 2736 2735 OLD FISH RD PVC 12 335.6 I None 4997 2735 2734 OLD FISH RD PVC 12 395.7 i None 5012 2727 2726 OLD FISH RD PVC 12 111 1 None 4018 2726 2725 OLD FISH RD PVC 12 421.6 1 ,niect Leak in iJownslream Manhole 2/25. small hole with runner. 5001 2733 2732 OLD FISH RD DIP 12 252.9 3 None 5003 2732 2731 OLD FISH RD PVC 12 298.9 3 None 5005 2731 2730 OLD FISH RD PVC 12 98.4 11111. Inject Pipe Connection in Upstream Manhole 2731,runner 5007 2730 2729 OLD FISH RD DIP 12 109.1 3 None 5009 2729 2728 OLD FISH RD DIP 12 77.2 3 None 5011 2728 2727 OLD FISH RD PVC 12 202.1 1 None 4016 2725 2724 OLD FISH RD PVC 12 86.3 1 None ` 4014 2724 2723 OLD FISH RD PVC 12 169 3 Inject Leak in Upstream Manhole 2724, runner. 8773 2723 PS2723 OLD FISH ROAD DIP 12 34.4 3 _ None 4927 2774 2773 UNIONVILLE RD PVC 8 362.5 3 None 4929 2773 2772 UNIONVILLE RD PVC 8 284.5 3 None 4931 2772 2771 SIKES MILL RD PVC 8 253.5 1 None 4933 2771 2770 SIKES MILL RD PVC 8 234.2 1 None 4935 2770 2769 SIKES MILL RD PVC 8 389.3 3 None 4937 2769 2768 SIKES MILL RD PVC 8 422.3 1 None 16025 13845 13852 SMITHFIELD DR PVC 8 381.4 1 1111 None 16026 13852 13853 SMITHFIELD DR PVC 8 171.6 1 None 16027 13853 13855 SMITHFIELD DR PVC 8 397.4 1 None 16028 13855 13856 SMITHFIELD DR PVC 8 149.8 1 None 16034 13833 13858 SMITHFIELD DR PVC 8 219.2 1 None 16040 13851 13858 SMITHFIELD DR PVC 8 204.4 1 None 4947 2762 2761 UNIONVILLE RD PVC 8 395.5 3 None 8944 7545 7544 CLONTZ LONG RD DIP 8 414.8 3 Note: Manhole 7545 buried under rocks. - 4999 2734 2733 OLD FISH RD PVC 12 315.2 1 None 16035 13838 13837 SMITHFIELD DR PVC 8 158.7 1 None 16036 13837 13836 SMITHFIELD DR PVC 8 402.3 1 None 16037 13836 13835 SMITHFIELD DR DIP 8 270.4 1 None Structural Defects Very few structural defects were identified in the mainline sections. Two sags were identified that do not require repair. The remaining pipe was found to be in good condition. Operation and Maintenance Defects and Infiltration O&M defects include debris, sand, rocks, grease, infiltration, etc. The sewer cleaning removed most settled / attached debris and deposits. There were very few maintenance defects and only one mainline joint with infiltration that needs a 4' sectional liner. This joint, between DIP and PVC, had a small dripper. See photo below. Se + ment between MH2762 - 2765— Infiltration dri • per at 'oint 43' downstream Distance' 43.6 ID: Infil Dripper Clack from:,8 Clack to: 9 P2ti ng: . - =•,w• Mrn> nsiolf ' n-I� nsion F:crn �rf:s : There was only one service lateral that needs a lateral seal for infiltration that is coming between the service lateral and the mainline section. See photo below. Service at 46' upstream of manhole 2784 has small runner. Distance. IR: Infil Purr Clock fr Clock to% Rating: 8 tht1L: Dimension1. Dimension. Remarks'', Grassy Branch — Condition Assessment Report Union County Water Page 6 of 14 B. Service Lateral CCTV Inspection In addition to the PACP inspection of all pipe segments, each service lateral was inspected and prioritized according to the Lateral Assessment Certification Program (LACP).. Based on our evaluations, each defect was assigned a priority rating from 1 to 5. The priority rating system uses the NASSCO Pipeline Assessment and Certification Program (PACP) methodology described above. A total of 132 service laterals were located in the collection system at the time of the project and all except 3 were inspected. All were PVC and 4-inches in diameter. A few had grease, sags, or offset joints, but only one requires repair. Each has been assigned a priority rating and the summary table is provided below. Zero (0) priority 5, one (1) priority 4, one (1) priority 3, eleven (11) priority 2, and one hundred sixteen (116) priority 1 service laterals were identified in the collection system (Table 2 below). A "Sewer Main Priority Rating Map" is provided in Appendix A and shows the location for all service laterals inspected as part of this evaluation. Inspection logs for all the service laterals are included in Appendix C. TABLE 4 — LATERAL PRIORITY RATING SUMMARY Priority Rating Priority 5 Quantity 0 Priority 4 1 Priority 3 1 Priority 2 11 _ Priority 1 116 Only one service lateral needs to be replaced. Signs of infiltration and roots were found in the lateral that is 81' upstream of manhole 7530; located at 2710 Falling Leaf Court. See photo of stain below. CCF i;:; IEriil Is►c I; ti 4+t11. s� 1,;:441,f1c' • SSY BRANCH CCTV AND LATERALS-7530 81.5 2710-2710 FALLING LEAF CRT Page 7 of 14 Grassy Branch — Condition Assessment Report Union County Water Table 5: Service Lateral Inspection and Condition Summary Spreadsheet on the following pages summarizes the results from the service lateral inspections and includes the structural and O&M defects for each service lateral. Data for each lateral section is presented as follows: • Inspection I.D. • Sewer line identification number • Service lateral identification number • Mainline identification number • Physical location description • Surveyed lateral length • Priority Rating • Rehabilitation/Repair Recommendations Grassy Branch — Condition Assessment Report Union County Water Page 8 of 14 Table 5: Service Lateral Inspection and Condition Summary Spreadsheet (LACP) Inspection ID # Sewer Line I.D. # Service Lateral I.D. # Mainline I.D. # Location Lateral Length Surveyed (ft) Priority Rating Repair Recommendation 1 16021 13827 MFt 2601 1 2601 SMITHFIELD DR 30.9 1 None 2 16021 13827_MH_2600 1 2600 SMITHFIELD DR 38.1 I None 3 16021 13828_131.3_2605 1 2605 SMITHFIELD DR 35.7 1 None 4 16021 13828_79.2_2604 1 2604 SMITHFIELD DR 26.2 1 None 5 16020 13857_MH_5419 3 5419 UNIONVILLE RD 11.4 1 None 6 16020 13857_MH_5415 3 5415 UNIONVILLE RD 7.6 1 None 7 16020 13846_63.9_2605 3 2605 SMITHFIELD DR 7.2 1 _ None 8 16248 13845_21.7_3004 5 3004 SMITHFIELD DR 8.5 1 None 9 16013 13843_MH_2904 6 2904 SMITHFIELD DR 32.4 1 None 10 16013 13844_ 6 2909 SMITHFIELD DR 32.8 _ None 11 16013 13844_238.6_2908 6 2908 SMITHFIELD DR 30.1 1 None 12 16013 13844_228.9_2913 6 2913 SMITHFIELD DR 33.1 1 None 13 16013 13844_59.1_2912 6 2912 SMITHFIELD DR 32.4 2 Offset joint. No repair needed. 14 16013 13844_MH_3000 6 3000 SMITHFIELD DR 40.6 1 None 15 16012 13842_MH_2901 7 2901 SMITHFIELD DR 22 2 Offset joint. No repair needed. Survey abandoned. 16 16012 13842_MH_3001 7 3001 CHRISTIAN CRT 33.5 1 1 None 17 16012 13842_63.3_2905 7 2905 SMITHFIELD DR 31.5 I None 18 16008 13841_158.4_3005 8 3005 CHRISTIAN CRT 8.2 1 None 19 16008 13841_156.1_3004 8 3004 CHRISTIAN CRT 11.8 1 None 20 16010 13840_MH_2828 10 2828 SMITHFIELD DR 39.3 1 None 21 16010 13841_60.9_2832 10 2832 SMITHFIELD DR 32.4 1 None 22 16009 13839_MH_2824 12 2824 SMITHFIELD DR 38.1 1 None 23 16009 13839_MH_2829 12 2829 SMITHFIELD DR 30.8 1 None 24 16015 13847_MH_2917 14 2917 SMITHFIELD DR 31.1 1 None 25 16015 13848_104.2_2205 14 2205 CORI JON DR 31.8 1 None 26 16015 13848_MH_ 14 2209 CORI JON DR 29.2 I None 27 16018 13849_MH_2217 16 2217 CORI JON DR 34.4 1 None 28 16018 13960_98.5_2213 16 2213 CORI JON DR 47.9 I None 29 16019 13853_MH_2713 17 2713 SMITHFIELD DR 7.5 1 None 30 16019 13960_116.9_2208 17 2208 CORI JON DR 10.1 1 None 31 16017 13850_MH_2221 18 2221 CORI JON DR 34.4 1 None 32 16035 13838_MH_2825 125 2825 SMITHFIELD DR 38.4 1 None 33 16035 13837_107.2_2820 125 2820 SMITHFIELD DR 29.8 1 None 34 16035 13837_67.7_2821 125 2821 SMITHFIELD DR 30.1 1 i None 35 16036 1836_300.3_VACANT L 126 VACANT LOT ON SMITHFIELD 33.4 1 None 36 16036 13836_295.4_2817 126 2817 SMITHFIELD DR 27.5 1 None 37 16036 13836_135.4_2812 126 2812 SMITHFIELD DR 35.7 1 None 38 16036 13836_109.4_2813 126 2813 SMITHFIELD DR 23.5 1 None 39 16037 13836_MH_2808 127 2808 SMITHFIELD DR 27.8 1 4 None 40 16037 13835_212.7_2804 127 2804 SMITHFIELD DR 34.7 1. None 41 16037 13835_71.6_2800 127 2800 SMITHFIELD DR 31.1 1 None 42 16037 13835_58.4_2225 127 2225 SMITHFIELD DR 31.4 1 None 43 16038 13834_231.1_2748 19 2748 SMITHFIELD DR 30.8 1 None 44 16038 13834_166.7_2224 19 2224 SMITHFIELD DR 31.5 1 44 None 45 16040 13851_MH_2744 121 2744 SMITHFIELD DR 17.4 1. None 46 16030 13829_MH_2708 21 2708 SMITHFIELD DR 31.9 1 None 47 16030 13830_327.6_2712 21 2712 SMITHFIELD DR 29.5 1 None 48 16030 13830_152.7_2716 21 2716 SMITHFIELD DR 30.2 _ Grease. No repair needed 49 16031 13830_MH_2720 22 2720 SMITHFIELD DR 28.9 1 None 50 16031 13831_243.2_2724 22 2724 SMITHFIELD DR 31.5 1..- None 51 16031 13831_64.7_2728 22 2728 SMITHFIELD DR 31.1 a None 52 16031 13831_MH_2732 22 2732 SMITHFIELD DR 26.2 2 Crack. No repair needed. 53 16033 13832_MH_2736 24 2736 SMITHFIELD DR 30.2 1 ;_11 None 54 16029 13833_194.8_2741 25 2741 SMITHFIELD DR 7.3 1 None 55 16029 13833_98.1_2733 25 2733 SMITHFIELD DR 7.9 1 None 56 16249 7533_39.4_2914 27 2914 LOxOALE FARM DR 10.1 1 None 57 16249 7533_38.0_2915 27 2915 LOXOALE FARM DR 9.8 I None 58 4061 7533_MH_2912 26 2912 LOXDALE FARM DR 61 1 None 59 4061 7534_240.6_2909 26 2909 LOXDALE FARM DR 12.8 1 None 60 4061 7534_226.1_2908 26 2908 LOXDALE FARM DR 35.8 1. None 61 4061 7534_136.3_2905 26 2905 LOXDALE FARM DR 9.8 1 None 62 4061 7534_72.4_2900 26 2900 LOXDALE FARM DR 39.1 1 None 63 4061 7534_40.3_2901 26 2901 LOXDALE FARM DR 9.8 1 None 64 4072 7540_16.0_1408 29 1408 HENRY SMITH RD 43.6 1 None 65 4073 7534_227.8_1407 28 1407 HENRY SMITH RD 10.5 None 66 4073 7534_181.9_1404 28 1404 HENRY SMITH RD 41.3 1 None 67 4073 7534_80.9_1400 28 1400 HENRY SMITH RD 42.4 1 None 68 4070 7538_MH_1415 30 1415 HENRY SMITH RD 39.7 None 69 407030 7538_MH_1416 1416 HENRY SMITH RD 66.2 None Inspection ID # 70 Sewer Line I.D. # 4070 Service Lateral I.D. # MainLine I.D# 30 Location Lateral Length Surveyed (ft) 41.6 Priority Rating 2 Repair Recommendation 7539_11.5_1412 1412 HENRY SMITH RD Grease. No repair needed 71 4063 7535_206.3_2829 31 2829 LOXDALE FARM DR 11.1 1 None 72 4063 7535_105.3_2825 31 2825 LOXDALE FARM DR 10.8 1 None 73 4065 7535_MH_2821 32 2821 LOXDALE FARM DR 5.9 1 None 74 4065 7536_92.1_2820 32 2817 LOXDALE FARM DR 42 1 None 75 4065 7536_16.0_2817 32 2817 LOXDALE FARM DR 8.9 1 None 76 4067 7537_362.6_2813 33 2813 LOXDALE FARM DR 11.4 1 None 77 4067 7537_309.6_2812 33 2812 LOXDALE FARM DR 43.6 1 None 78 4067 7537_269.4_2809 33 2809 LOXDALE FARM DR 9.2 1 None 79 4067 7537_227.2_2808 33 2808 LOXDALE FARM DR 43.9 1 None 80 4067 7537_160.0_2804 33 2804 LOXDALE FARM DR 39 3 Sag. No repair needed. 81 4067 7537_147.7_2805 33 2805 LOXDALE FARM DR 8.8 1 None 82 4067 7537_68.7_2800 33 2800 LOXDALE FARM DR 42.8 1 None 83 4074 7537_291.0_1605 34 1605 ERINDALE CRT 30.7 1 _ None 84 4074 7537_266.4_1604 34 1604 ERINDALE CRT 52.7 1 None 85 16250 7541_54.7_1608 35 1608 ERINDALE CRT 5.2 None 86 16250 7541_53.0_1609 35 1609 ERINDALE CRT 5.8 None 87 4075 7537_401.2_2704 36 2704 LOXDALE FARMS DR 42.3 1 None 88 4075 7537_319.3_2705 36 2705 LOXDALE FARMS DR 10.1 1 None 89 4075 7537_285.7_2706 36 2706 LOXDALE FARMS DR 43.6 1 None 90 4075 7537_198.6_2709 36 2709 LOXDALE FARMS DR 9.1 1 None 91 4075 7537_184.3_2710 36 2710 LOXDALE FARMS DR 43.9 1 None 92 4075 7537_95.6_1600 36 1600 ERINDALE CRT 44.2 _ None 93 4075 7537_92.9_2713 36 2713 LOXDALE FARMS DR 8.8 ? None 94 4075 7542_MH_2700 36 2700 LOXDALE FARMS DR 48.9 None 95 4075 7542_MH_2701 36 2701 LOXDALE FARMS DR 9.6 1 None 96 4068 7530_324.9_2801 37 2801 LOXDALE FARMS DR 8.9 1 None 97 4068 7530_143.5_2800 37 2800 FALLING LEAF CRT 8.9 None 98 4057 7531_MH_2805 38 2805 FALLING LEAF CRT 44 1 None 99 4057 7531_MH_2804 38 2804 FALLING LEAF CRT 57.1 None 100 4059 7532_MH_2702 39 2702 FALLING LEAF CRT 58.4 1 None 101 4059 7532_MH_2700 39 2700 FALLING LEAF CRT 48.5 1 None 102 4059 7532_MH_2703 39 2703 FALLING LEAF CRT 35.1 1 None 103 4059 7530_179.1_2706 39 2706 FALLING LEAF CRT 57.1 1 None 104 4059 7530_157.8_2707 39 2707 FALLING LEAF CRT 9.2 I None 105 4059 7530_81.5_2710 39 2710 FALLING LEAF CRT 36.1 a Infiltration stain. Roots. Replace lateral. 106 4058 7530_131.4_2711 40 2711 FALLING LEAF CRT 10.1 r- 1 None 107 4058 7530_128.8_2801 40 2801 FALLING LEAF CRT 2.6 0 Could not inspect. 108 4910 2780_MH_2909 42 2909 SIKES MILL RD 65.9 1 None 109 4913 2778_46.9_3019 43 3019 SIKES MILL RD 5.9 1 None 110 4911 2780_1.3_3001 44 3001 SIKES MILL RD 0 0 Could not inspect. 111 4917 2779_201.2_3201 46 3201 SIKES MILL RD 83.6 2 Sag. No repair needed. 112 4917 2779_20.5_3101 46 3101 SIKES MILL RD 31.8 2 Sag. No repair needed. 113 16047 13953_346.3_5722 64 5722 RUSHING BENTON RD 7.8 2 Rocks. Appears to be abandoned. 114 16050 13948_146.3_5720 67 5720 RUSHING BENTON RD 10.7 I None 115 4931 2771_117.2_3401 112 3401 SIKES MILL RD 7.8 1 None 116 16025 13845_361.9_2204 116 2204 CORI JON DR 7.5 1 None 117 16025 13845_291.2_2705 116 2705 SMITHFIELD DR 7.5 1 None 118 16025 13845_168.6_2200 116 2200 CORI JON DR 7.5 1 None 119 16025 13845_155.1_2701 116 2701 SMITHFIELD DR 7.5 1 None 120 16026 13852_MH_2709 117 2709 SMITHFIELD DR 8.9 2 None 121 16026 13853_MH_2713$ 117 2713 SMITHFIELD DR 7.5 J None 122 16027 13855_292.3_2717 118 2717 SMITHFIELD DR 6.9 3 None 123 16027 13855_243.9_2216 118 2216 CORI JON DR 7.9 1 None 124 16027 13855_146.3_2721 118 2721 SMITHFIELD DR 7.8 1 None 125 16027 13855_55.3_2216 118 2216 CORI JON DR 10.8 - 2 Bends. No repair needed. 126 16027 13855_17.5_2725 118 2725SMITHFIELD DR 7.5 1 None 127 16028 13856_105.2_2729 119 2729 SMITHFIELD DR 3.2 Split; 2 houses. No repair needed. 128 16028 13856_43.6_2220 119 2220 CORI JON RD 7.9 1 _ None 129 16034 13858_148.7_2740 120 2740 SMITHFIELD DR 7.9 I. • None 130 4947 2761_15.7_6114 122 6114 UNIONVILLE RD 11.8 Offset joint. No repair needed. 131 8944 7545_MH_1621 123 1621 CLONTZ LONG RD 0.3 0 Could not inspect. 132 4999 2734 110.9 1808 124 1808 OLD FISH RD 8.7 None IV. ALTERNATIVES EVALUATION Several methods and technologies are available for the rehabilitation of sewer mains and service laterals. This section discusses the available and most commonly recommended / implemented rehabilitation methods. A. Manhole Rehabilitation and Repairs 1. Pipe Connection Infiltration Pipe connections between the manhole wall and the influent and effluent piping are sometimes found to be sources of infiltration and root intrusion. These connections may lack a boot (typically older brick manholes) and not be adequately grouted or the boot was not properly seated and tightened around the pipe during installation. Infiltration is especially prevalent in deeper manholes, where the hydrostatic pressure from high groundwater levels can cause significant leaks through relatively small cracks and holes. We recommend that leaking pipe connections be sealed by injecting chemical grout pumped through drilled injection ports into the crack or void from the inside of the manhole. The grout will penetrate to the exterior of the manhole, where it will fill any voids and seal the leak from the outside. After the void has been filled with chemical grout, cementitious grout should be used to seal the pipe connection from the inside of the manhole. Estimated Cost: $500.00 per Pipe Connection. B. Sewer Main Rehabilitation and Repairs 1. Open -Cut Point Repairs A point repair consists simply of excavating down to a damaged section of pipe and replacing the damaged section with new pipe. It is used when damage is isolated to one particular area of the pipe, generally less than twenty feet in length. It is also used to repair pipe collapses, sags, and/or offset joints prior to manhole - to -manhole trenchless rehabilitation by CIPP. It can be very disruptive to the surrounding area, especially if the pipe is deep or underneath pavement. It can also be extremely expensive depending upon the location and/or depth of the repair. Estimated Cost: 8" — 12" = $12,500 15" — 18" = $17,500 *Includes bypass pumping, assumes DIP 2. Internal CIPP Sectional Liner (CIPP Spot Repair) Sectional cured -in -place spot repairs are ideal for patching holes and other isolated, non -deformed structural defects. Spot repair patches can be used for infiltration control when hydrophilic 0-rings or caulk is used between the host pipe Page 11 of 14 Grassy Branch — Condition Assessment Report Union County Water and ends of the repair patch. Most manufactures have repair patches available up to 42-inches and lengths of 2, 4, and 8-feet are common. Patches are fiberglass with epoxy resin or typical felt with vinylester resin. Spot repairs are installed with a flow through bladder. The patch is secured to the inflatable bladder, pulled into place, the bladder pressurized to form the patch tightly to the pipe surface and allowed to cure ambiently. Because the bladder is flow through, little or no flow control is required during installation Estimated Cost: 8" — 12" = $5,000 15" — 18" = $9,500 C. Service Lateral Rehabilitation and Repairs The following section discusses service lateral rehabilitation methods including connecting service laterals to the main line. Cost estimates for each method are provided based on similar rehabilitation projects. 1. Open -Cut Replacement This method of repair consists of excavating the defective service lateral and replacing it with a new lateral within the same trench. This method is the most cost effective to rehabilitate shallow service laterals in low traffic areas. Although it obviously requires more excavation, it is the most frequently recommended method for service rehabilitation. Service lateral replacement is only performed from the sewer main to the right-of-way (location of the cleanout). Estimated Cost: $100 per linear foot of service lateral (If the replacement of the lateral includes the replacement or installation of a cleanout and reconnection to the main line, the total cost is usually an additional $2,000 or $3,000.) 2. CIPP Lateral Seal Full Wrap Lateral Seal rehabilitation is a trenchless service connection rehabilitation method used to seal leaking service connections and restore structurally integrity. Full wrap lateral seals are recommended when conflicts or depth increase the difficulty and cost of excavation. A full wrap later seal includes a polyester felt tube with a sewn flange that covers up to 16-inches of the mainline in a full wrap. The use of hydrophilic sealants and silicate resins applied to the backside of the full warp connection enhances the watertight seal. Typically, this wrap includes 2-feet of lateral liner to extend up into the service lateral. Ambient cure polyester or vinylester resins are used. Diameters of 4-inch and 6-inch service lateral rehabilitation are possible with 8-inch to 24-inch mainline wraps. During installation, the mainline must be cleaned and free of all debris. Roots and other debris are removed from the lateral connection. The full wrap lateral seal is loaded on a silicone bladder lateral train and inserted through the downstream Grassy Branch — Condition Assessment Report Union County Water Page 12 of 14 manhole. When the lateral train reaches the connection (as confirmed by standard CCTV equipment), the bladder is inflated and held at the recommended air pressure while the connection seal is allowed to cure. Once cured, the bladder is removed and the service is returned to use. Estimated Cost: $ 10,500.00 per CIPP lateral seal 2. Reconnecting Laterals to Main Line This process consists of reconnecting a lateral to a sewer main by use of a saddle or fitting. It is used to repair break-in taps or other defective connections, which are very common in older collection systems. These connections are very susceptible to ground water infiltration and root intrusion. It is recommended that break-in taps be replaced by a saddle connection. Estimated Cost: $6,000.00 per service lateral 3. Installation of Clean -outs Many older service laterals were installed without clean -outs at the property line (right-of-way). Without them, it can be very difficult to remove blockages that can occur in the laterals. If a clean -out on private property is used, it can be difficult to determine whether the responsibility for removing a blockage lies on the property owner or the municipality. To allow for easier maintenance, we recommend that all service laterals have clean -outs installed at the property line or edge of right-of- way. Estimated Cost: $1000.00 per clean -out Page 13 of 14 Grassy Branch — Condition Assessment Report Union County Water V. REPAIR / REPLACEMENT / REHABILITATION (RRR) RECOMMENDATIONS WITH COST ESTIMATES Overall, the collection system was found to be in very good condition. Only a few active infiltration defects were identified; most were in manholes or at the manhole/pipe connection. Because there are so few repairs, the price of each repair can be expected to be highly inflated if this work is done as a standalone project. We recommend including these few repairs in with another sewer rehabilitation project in order to obtain better overall pricing. TABLE 6: RRR COSTS Estimated Unit Description Quant. Cost Rehabilitation Extended Amount Inject Leak in Manhole Wall 2 EA $1000.00 $2,000.00 Inject Pipe Connection in Manhole 2 EA $500.00 $1,000.00 Install 4' CIPP Sectional Liner in Main 1 EA $5,000.00 $5,000.00 Reconnect Service Lateral 1 EA $6,000.00 $6,000.00 Replace Service Lateral 36 LF $100/LF $3,600.00 Sub -Total Contingencies (10%) Engineering and Inspection (15%) Estimated Total $17,600.00 $1, 760.00 $2,640.00 $22,000.00 *Actual price may be inflated unless these items are combined with another project. *Service lateral replacement is located on private property. VI. CONCLUSION This report presents the data, results, and recommendations from the evaluation of the Grassy Brach gravity collection system. Based on the CCTV inspection results, there are only a few minor defects in the collection system that need to be addressed. We encourage Union County Water to move forward with the recommendations presented in this study. Following these repair recommendations will reduce I/1 reaching the WRF. Furthermore, tending to these issues will prevent these defects from getting worse over time. We also recommend that the County include these repairs in with another sewer rehabilitation project for the best possible cost benefit. Hydrostructures, P.A. has extensive experience with trenchless rehabilitation engineering, and we would welcome the opportunity to assist the County with the implementation of RRRs proposed in this report. Grassy Branch — Condition Assessment Report Union County Water Page 14 of 14