WIXLIB

APPENDIX B – EARLY ACTION PROJECTSProject NameProject DescriptionNumber ofLSImpactedApproximateFeet of PipeWrightwoodTunnelDesign of 84”tunnel to divertflow of existing 60”sewer alongWrightwood toexisting 90” tunnel.Design of a 4,000 LFof 54" (0.09% slope)sewer and 600 LF of78" (0.049%) sewerfrom AldineWestfield @ RankinRd to HCFCD P15500-00Design of a 5,800 LFof 54" Trunk Sewerfrom Hardy AirportConnector @HCFCD P155-00-00to Greens Rd.toreceive the flowfrom the dual FMdesigned in R-53608-3Design of gravitysewers to divert theflow from Park TenWWTP to NorthEldridge LS, whichpumps to TurkeyCreekN/A 4,000 LF84” sewerN/A4,000 LF of54" sewerNorthCorridorConsolidationPackage 1ATrunk SewerNorthCorridorConsolidationPackage 1B:Park TenWWTPAbandonment and FlowDiversion toTurkey 600 LF of78" sewerN/A5,800 LF of54" sewer2021312,640 LF of24” and 30”sewer20234,756 LF of24” FMWWTP PRIORITIES69th Street WWTPRepair/Replacement of CentrifugesThe original twenty-one centrifuges started operation in 1987. Since that initial startup, two units havebeen replaced in-kind. It is anticipated that, beginning in FY2022, the remaining original centrifuges willbe replaced in-kind with new units. Construction should be complete by FY2024.Repair/Replacement of Sludge DryersThe flash dryers also started operation in 1987. One dryer was overhauled in 2003 and it is anticipatedthat key parts of the other six (6) units will be replaced. Rehabilitation of the dryers is anticipated tobegin in FY2021 and be complete by FY2026.New Cloth Media FiltersNew cloth media filters will be installed, providing greater hydraulic capacity while not requiringreplacement of the filter structure. The filters will be procured in fiscal year 2019. Construction isPage 16 of 17

APPENDIX B – EARLY ACTION PROJECTSscheduled to be complete by the end of FY2023.Upper Brays WWTPWork at the Upper Brays WWTP to repair the aeration system at aeration basin #3 is completed; diffuserreplacement in basin #1 and #2 is in progress. Construction is scheduled to be complete by FY2019.Other WWTPsThere are other plants which have had effluent or other issues which will be addressed by priorityprojects. These WWTPs, and the proposed projects, are identified in the following table:WWTP Early Action ProjectsWWTPProjectAlmeda SimsBlower Replacement &Addition of Clarifier No. 6Basin CleaningGrit Removal SystemImprovementsBlower ImprovementsDisinfectionImprovementsClarifier RehabilitationBlower ImprovementsClarifier RehabilitationPurge Blower, Mixer andChlorine Contact BasinImprovementsPost-aeration basinmodificationsGreenridgeKeegans BayouMetro CentralSouthwestKingwood CentralFWSD 23Chlorine Contact BasinImprovementsWestwayClarifier ImprovementsCompletionDateFY 2024FY 2021FY 2021FY 2020FY 2020FY 2020FY 2021FY2021Being reevaluated dueto Harveydamage.Being reevaluated dueto Harveydamage.FY 2021Page 17 of 17

Appendix CDescription of 9 Areas forCapacity Remedial Measures Plan(s)

Known Capacity Constraints (Wet Weather SSO FY16 to FY18 Evaluation)AreaHCFCDRaingageArea 1RG 1680Area 2RG 560Area 3RG 2220Area 4RG 400Area 5, 6 & 7RG 410Area 8RG 2210Area 9RG 465Area 1Area 8Area 2Area 3Area 9Area 5Area 6Area 7Area 4Appendix C ‐ Page No: 1

Area 1Appendix C ‐ Page No: 2

Area 2Appendix C ‐ Page No: 3

Area 3Appendix C ‐ Page No: 4

Area 4Appendix C ‐ Page No: 5

Area 5Appendix C ‐ Page No: 6

Area 6Appendix C ‐ Page No: 7

Area 7Appendix C ‐ Page No: 8

Area 8Appendix C ‐ Page No: 9

Area 9Appendix C ‐ Page No: 10

Appendix DSewer Basin and Lift Station Prioritization Matrices

Sewer Basin Prioritization:Relative Weightage for Different ParametersUsed for Sewer Basin PrioritizationLevel 1RelativeWeightsLevel 2RelativeWeightsRegulatoryLevel of Service60%40%RSSOPublic SSOPrivate SSOAlmost SSORepeatStoppageStoppageRepeat OdorOdor50%40%10%40%30%15%10%5%1

Scoring Criteria for Sewer Basin Prioritization Parameters(Score: 0 to 5, 5 being the worst)S. N.Parameter5432101Repeat SSO(RSSO)Normalized RSSO Count 9.400Normalized RSSO count 4.050 to 9.400Normalized RSSO count 1.885 to 4.050Normalized RSSO count 1.130 to 1.885Normalized RSSO count 0.200 to 1.130RSSO 02Public SSONormalized Public SSOcount 9.570Normalized Public SSOcount 5.345 to 9.570Normalized Public SSOcount 2.738 to 5.345Normalized Public SSOcount 1.524 to 2.738Normalized Public SSOcount 0 to 1.524Public SSO count 03Private SSONormalized Private SSOcount 10.850Normalized Private SSOcount 6.537 to 10.850Normalized Public SSOcount 3.665 to 6.537Normalized Public SSOcount 1.920 to 3.665Normalized Public SSOcount 0 to 1.920Private SSO count 04Almost SSONormalized Almost SSOcount 4.265Normalized Almost SSOcount 3.412 to 4.265Normalized Almost SSOcount 2.439 to 3.412Normalized Almost SSOcount 1.813 to 2.439Normalized Almost SSOcount 0.210 to 1.813No Almost SSO5RepeatStoppageNormalized Value 79.600Normalized Value 45.200to 79.600Normalized Value 20.850 to 45.200Normalized Value 9.930to 20.850Normalized Value 0.670 9.930No Repeat Stoppage6StoppageNormalized Value 33.400Normalized Value 21.150to 33.400Normalized Value 11.940 to 21.150Normalized Value 6.030to 11.940Normalized Value 0.470 to 6.030No Stoppage7Repeat OdorNormalized Value 9.450Normalized Value 4.200to 9.450Normalized Value 2.730 to 4.200Normalized Value 1.953to 2.730Normalized Value 0.450 to 1.953No Repeat Odor8OdorNormalized Value 8.670Normalized Value 5.355to 8.670Normalized Value 3.082 to 5.355Normalized Value 1.702to 3.082Normalized Value 0.470 to 1.702No Odor Complaint2

Lift Station Prioritization (Risk‐based):Risk Score Likelihood of Failure (LOF) x Consequence of Failure (COF)Scoring Criteria for LOF Parameters (for Lift Station Prioritization)(Score: 1 to 5, 5 being the worst)S. N.1234Likelihood ofFailure tricalConditionRelativeWeight (abs)543213 31 yrs.20 to 30 yrs.15 to 19 yrs.11 to 14 yrs.10 yrs. or lessVery Poor/ RequireReplacementVery Poor/ RequireReplacementVery Poor/ RequireReplacementPoor/ RequireRehabilitationPoor/ RequireRehabilitationPoor/ RequireRehabilitationModerate/ RequireSignificant MaintenanceModerate/ RequireSignificant MaintenanceModerate/ RequireSignificant MaintenanceGood/ Minor DefectsExcellent/ Very GoodGood/ Minor DefectsExcellent/ Very GoodGood/ Minor DefectsExcellent/ Very Good243Capacity InadequateCapacity adequate@ 10K GPAD@ 10K GPAD1High RiskLow RiskFacilityBuilding1High RiskLow Risk8Accessibility1High RiskLow Risk9FIRM Capacity1FC 5 MGD10Design Safety1High Risk11Flood Zone1in Floodway5CapacityLimitation26Site Property7FC 2.25 to 5 MGDFC 0.5 to 2.25 MGDFC 0.25 to 0.5 MGDFC 0.25 MGDLow Riskin 100‐yr FP3in 500 yr FPIn Zone X

Scoring Criteria for COF Parameters (for Lift Station Prioritization)(Score: 1 to 5, 5 being the worst)S.N.Consequenceof Failure (COF)RelativeWeight (abs)543211Public Disruption1SA 580 acSA 281 to 580SA 141 to 280SA 61 to 140SA 601No of odor complaint 7No of odor complaint 6No of odor complaint 4 to 5No of odor complaint 3No of odor complaint 21No of US LS 22345Customer rHistoryLiftStationRelated SSOs33No of US LS 1No of US LS 0No. of WO in 3‐yrs 18No. of SSO in 3‐yrs 14No. of WO in 3‐yrs 16to 17No. of SSO in 3‐yrs 11to 13No. of WO in 3‐yrs 14to 15No. of SSO in 3‐yrs 8to 10No. of WO in 3‐yrs 12 tp 13No. of SSO in 3‐yrs 5to 7No. of WO in 3‐yrs 12No. of SSO in 3‐yrs 56Repair Cost2Motor HP 120Motor HP 50 to 119Motor HP 20 to 49Motor HP 8 to 19Motor HP 87Retention Time3T 5 hrsT 5 to 10 hrsT 11 to 16 hrsT 17 to 71 hrsT 72 hrs8Critical Industries1 32 to 30 to 4

Appendix EWWTP Violations and Associated Corrective Action

Plant GreenridgePermit ParameterNon-ComplianceDate(s)2‐hr peak8/26/20178/28/20178/27/2017CBOD5E. coliCORRECTIVE ACTIONHurricane Harvey related. The region experienced extreme rainfall due to HurricaneHarvey. Ten inches of rain were recorded at the WWTP on August 26, 2017.Operations personnel made process adjustments, as conditions allowed, to maximizetreatment.During the heavy rainfall of 3.27 inches on April 17, 2015, a sudden hydraulic surge wascreated through the plant, due to the sudden rise in the flow (18 mgd). This caused solidsto build up in the clarifiers and escape with the effluent, which contributed in the CBOD-5excursion.Operations staff is closely monitoring the plant and making process adjustments, as needed.04/17/201505/13/2015Insufficient bleach feed in the system during an abnormal high flow at the time ofsampling. Chlorine deficiency in the contact basin resulted in elevated E. coli bacteria inthe effluent.Work order # 1122347 was created for the chlorination group to thoroughly inspect thechlorination system to ensure proper operation.06/18/2015Undetermined. Both the operator logs and SCADA trends indicated that the chlorineWork order # 1134273 was created for the chlorination group to evaluate the chlorinationresidual and effluent flow were variable, but the chlorine residual was above 1.0 mg/L prior system to ensure proper operation.to and at the time of sample collection.07/01/2015Undetermined. Chlorine residual by grab sample and analyzer indicated that the plant was Work order # 1134273 was created for the chlorination group to evaluate the chlorinationin compliance.system to ensure proper 2018NH3‐N01/22/20151/18-1/24/2015TSSInitial Root Cause AssessmentUndetermined. SCADA trends indicate that the residual was 1.75 mg/L at the time ofsampling.Chlorination system was assessed under work order # 1233658Equipment failure resulted in insufficient chlorination to properly disinfect theeffluent.The chlorination group troubleshooted the chlorine monitoring system.The disinfection system was not maintaining an adequate chlorine residual at the timeof sample collection.The chlorination group repaired the disinfection system.The return sludge pumps malfunctioned, causing inadequate return of sludge to theprocess and an elevated ammonia concentration in the effluent.Clogged return telescopes caused a deficiency of RAS in the process, disrupting thecomplete treatment of ammonia.All return sludge pumps were immediately restored back to service under work orders1231783 and 1237180.The return telescope cleaning schedule was revised to include more frequent monitoringand cleaning.Combination of heavy rain and multiple flow restrictions in the clarifiers. According to therain gauge at the WWTP, it rained 1.10 inches on 1/22/2015 and caused a sustained flowof 10 mgd for over 4 hours. The hydraulic surge due to the wet weather caused debris toplug the inlets and center wells of the clarifiers. This caused solids to build up and escapewith the effluent, and resulted in a high TSS concentration.Work order # 1087159 was created to remove all trash and debris from clarifier inlets andcenter wells. The situation corrected itself once flow subsided.Combination of heavy rain and multiple flow restrictions in the clarifiers. According to Work order # 1087159 was created to remove all trash and debris from clarifier inlets andthe rain gauge at the WWTP, it rained 1.10 inches on 1/22/2015 and caused acenter wells. The situation corrected itself once flow subsided.sustained flow of 10 mgd for over 4 hours. The hydraulic surge due to the wet weathercaused debris to plug the inlets and center wells of the clarifiers. This caused solids tobuild up and escape with the effluent and resulted in a very high TSS concentration onJanuary 22, 2015, which affected the calculated 7-day average concentration.04/01/2015All lift station pumps came on during the heavy rainfall of 3.27 inches on April 17, 2015, Operations staff is closely monitoring the plant and making process adjustments, as needed.resulting in a flow increase to 18 mgd. This apparently reduced detention time, allowingsolids to build up in the clarifiers that escaped with the effluent. This increased the TSSdaily average above the permitted limit.04/16/2015During the heavy rainfall of 2.5 inches on April 16, 2015, a sudden hydraulic surge wasOperations staff is closely monitoring the plant and making process adjustments, as needed.created through the plant, due to the sudden rise in the flow ( 15 mgd). This caused solidsto build up in the clarifiers and escape with the effluent.During the heavy rainfall of 3.27 inches on April 17, 2015, a sudden hydraulic surge wascreated through the plant, due to the sudden rise in the flow (18 mgd). This caused solidsto build up in the clarifiers and escape with the effluent.Operations staff is closely monitoring the plant and making process adjustments, as needed.04/17/2015Heavy rainfall of 3.27 inches on April 17, 2015, and 2.5 inches on April 16, 2015,created hydraulic surges through the WWTP. Solids built up in the clarifiers andescaped with the effluent, leading to TSS exceedance for two days. The high TSSconcentrations for two consecutive days affected the calculated 7-day averageconcentration.Operations staff is closely monitoring the plant and making process adjustments, as needed.4/12 TO ier issues were caused by debris build up in the inlet of # 3 clarifier, increasing flowWork orders have been submitted to clean the inlets and center wells of the clarifiers.toward the smaller clarifiers (# 1 and 2). Some short circuiting occurred, allowing a high(#1083298, #1083490, #1087159)rate of flow to reach the weirs prior to settling. Severe thunderstorms produced 3.20 inchesof rain, which may have contributed to the problem. These factors allowed solids toescape over the weirs and caused the TSS violation.A combination of high solids in the plant and problems with the lift station causedelevated TSS in the effluent. Rainfall may have also contributed to the problem. OnJanuary 8, 2016, 0.76 inches of rain were recorded at the WWTP.A sudden surge of flow, created when the lift station pumps were reprimed, causedsolids to be pushed out of the clarifier, into the chlorine contact basin, and out theoutfall.A power outage on July 8, 2017 caused the return pump to trip off. As a result, anaccumulation of solids in clarifier #2 eventually flowed over the clarifier weirs to thechlorine contact basin and through the outfall.Page 1 of 19Operations is working diligently to remove excess solids from the plant.The operator has been retrained on the effects of sudden surges of flow. A work orderwas written for the installation of air relief valves on the lift pumps.The tripped return pumps were repaired.

Plant FWSD 23Permit 10/30/201510/31/201512/13/2015CORRECTIVE ACTIONOperations staff is closely monitoring the plant and making process adjustments asneeded.Operations staff is closely monitoring the plant and making process adjustments asneeded.Operations staff is closely monitoring the plant and making process adjustments asneeded.Rain in the service area. On January 8, 2016, 0.79 inches of rainwere recorded at the WWTP.A total of 4.43 inches of rain were recorded at the WWTP onApril 17 and 18, 2016.4/17/16: 3.63 inches4/18/16: 0.8 inchHeavy rain in the service area. On May 27, 2016, 2.86 inches ofrain were recorded at the WWTP.Heavy rain in the service area. On June 2, 2016, 2.10 inches ofrain were recorded at the WWTP.Heavy rain in the service area. On June 3, 2016, 1.7 inches ofrain were recorded at the WWTP.Operations staff is closely monitoring the plant and making process adjustments asneeded.6/4/2016Heavy rain in the service area. On June 3 and 4, 2016, 1.70 and0.20 inches of rain were, respectively, recorded at the WWTP.Operations staff is closely monitoring the plant and making process adjustments asneeded.1/18/2017Heavy rain in the service area. On January 17 and 18, 2017 atotal of seven inches of rain were recorded at the WWTP.1/8/20164/18/20165/27/20166/2/20166/3/20162 hour peak flowInitial Root Cause AssessmentSevere rain in the service area. On October 24, 8.43 inches of rainwere recorded at the WWTP. On October 25, 1.41 inches of rainwere recorded at the WWTP.Severe rain in the service area. On October 30, 7.6 inches of rainwere recorded at the WWTP. On October 31, 1.17 inches of rainwere recorded at the WWTP.Heavy rain in the service area. On December 13, 2015, 1.42 inchesof rain were recorded at the 20/20187/4/20189/9/2018Operations staff is closely monitoring the plant and making process adjustments asneeded.Operations staff is closely monitoring the plant and making process adjustments asneeded.Operations staff is closely monitoring the plant and making process adjustments asneeded.Operations staff is closely monitoring the plant and making process adjustments asneeded.NOTE: The Bretshire WWF did not discharge.Operations staff is closely monitoring the plant and making process adjustments asHeavy rain in the service area. On January 20, 2017 2.64 inches needed.of rain were recorded at the WWTP.NOTE: The Bretshire WW

Imperial Valley WWTP flow diversion Flow Diversion (36-inch gravity sewer line) from Imperial Valley WWTP to Northgate Regional LS. 1 10,220 LF of 36" 2026 North Corridor Consolidation Package 4 MUD #203 WWTP flow diversion Flow diversion through a 36" Gravity Sewer from MUD #203 WWTP to Northgate Regional LS. 1 11,758 LF of 36" 2026 Flow