Wastewater Collection and Treatment Facility Plan
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Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico TABLE OF CONTENTS Section Title Page No. I. Project Identification ........................................................................................... A. Project Name .............................................................................................. B. Project Number .......................................................................................... C. Facility Planning Area .................................................................................. D. Description of Proposed Project .................................................................. E. Background Information ............................................................................... I-1 I-1 I-1 I-1 I-3 I-4 II. Summary, Conclusions, and Recommendations .................................... A. Executive Summary .................................................................................. 1. Community Background ..................................................................... 2. Project Objective and Purpose ............................................................ 3. Regulations Governing Wastewater Disposal ..................................... 4. Proposed Wastewater Collection and Treatment Facility .................... B. Funding ...................................................................................................... 1. Project Phasing ..................................................................................... 2. Management Capability ......................................................................... 3. Financial Feasibility Analysis ............................................................... 4. Otero County ....................................................................................... C. System Operations ................................................................................... 1. Wastewater Facility Operations ............................................................. 2. Facility Staff Requirements ................................................................. 3. Right-Of-Way Acquisition Summary ...................................................... II-1 II-1 II-1 II-2 II-2 II-3 II-9 II-9 II-10 II-12 II-15 II-16 II-16 II-16 II-17 III. Purpose and Need of Facilities Planning ................................................ A. Scope, Purpose and Goals ........................................................................ B. Compliance with Applicable Requirements ................................................ III-1 III-1 III-10 D:\106738948.DOC i Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico TABLE OF CONTENTS Section Title .............................................................................. Page No. IV. Existing and Future Conditions in the Planning Area ...................................... A. Assessment of Existing Conditions ............................................................ 1. Existing Significant Environment Conditions ....................................... 2. Existing General Conditions ............................................................... 3. Existing Wastewater Flows and Treatment Systems ........................... B. Assess Future Conditions .......................................................................... 1. Planning Period For Treatment Alternatives ........................................ 2. Land Use ............................................................................................. 3. Population Forecast ............................................................................ 4. Industrial and Other Public Facilities ..................................................... 5. Forecasts of Flow and Waste Loads .................................................. IV-1 IV-1 IV-1 IV-5 IV-16 IV-19 IV-20 IV-21 IV-24 IV-29 IV-29 V. Development of Collection, Treatment and Effluent Disposal Alternatives ............ A. Development of Collection Alternatives ..................................................... 1. Pressure Sewer System ...................................................................... 2. Vacuum Sewer System ....................................................................... 3. Gravity Sewer System ........................................................................ B. Development of Treatment Alternatives .................................................... 1. Constructed Wetlands ........................................................................ 2. Septic Tank Effluent Pump (STEP) System ........................................ 3. Extended-Aeration Activated Sludge/Oxidation Ditch ......................... 4. Advanced Facultative Ponds ............................................................... (Principal Treatment Alternative No. 1) 5. Conventional Activated Sludge - Sequencing Batch Reactors ........... (Principal Treatment Alternative No. 2) 6. Fixed Film Bio-Tower .......................................................................... (Principal Treatment Alternative No. 3) V-1 V-1 V-2 V-9 V-17 V-27 V-28 V-30 V-30 V-31 ii V-39 V-45 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico TABLE OF CONTENTS Section A. Title .............................................................................. Page No. Development of Effluent Disposal Alternatives ......................................... 1. Reuse of Effluent for Agricultural Surface Irrigation ........................... 2. Underground Re-injection .................................................................... 3. Effluent Evaporation/Infiltration .......................................................... V-51 V-51 V-62 V-67 VI. Evaluation of Alternatives and Plan Adoption ........................................................ A. Cost-Effective Analysis ................................................................................ 1. Collection System Alternatives ............................................................ 2. Treatment System Alternatives ........................................................... 3. Effluent Disposal Alternatives .............................................................. B. Engineering Evaluation ............................................................................. 1. Reliability ............................................................................................... 2. Reduction of Energy Use .................................................................... 2. Water Supply Implication of the Project .............................................. 3. Revenue Generating Applications ...................................................... 4. Process Complexity and Appropriateness ........................................... 5. Open Space and Recreation Opportunity ........................................... 6. Environmental Impacts .......................................................................... 7. Implementability ................................................................................. VI-1 VI-1 VI-1 VI-5 VI-9 VI-12 VI-12 VI-15 VI-16 VI-18 VI-18 VI-21 VI-22 VI-25 VII. Public Participation ................................................................................................ A. List of Interested Parties ............................................................................ B. Notice to Mailing List and Media .................................................................. C. Notification Requirements .......................................................................... D. Public Hearings and Meetings ................................................................... E. Correspondence ........................................................................................ F. Significant Issues ...................................................................................... G. Responsiveness Summary ........................................................................ VII-1 VII-1 VII-1 VII-1 VII-1 VII-1 VII-1 VII-1 D:\106738948.DOC iii Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico TABLE OF CONTENTS Section VIII. Title .............................................................................. Page No. Selected Plan Description and Implementation Arrangement ......................... A. Alternative Ranking and Selection ............................................................ B. Description of Selected Alternative ............................................................ C. Financial and Management Capability ....................................................... 1. Required Community Fee Structure .................................................... 2. Financial Feasibility Analysis ............................................................... 3. Total Individual Property Owner Costs ................................................ 4. Cost Information .................................................................................... 5. Cost Impacts on Users .......................................................................... 6. Capital Financing Plan ........................................................................ 7. Project Implementation ........................................................................ 8. Facility Staffing Requirement ............................................................... iv VIII-1 VIII-1 VIII-1 VIII-16 VIII-16 VIII-21 VIII-34 VIII-35 VIII-36 VIII-39 VIII-39 VIII-44 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF TABLES Table No. Title Page No. 1 NMWQCC Surface Water Discharge Standards ................................................ 2 NMWQCC Ground Water Discharge Standards ................................................. 3 Well Locations and Output Rates ....................................................................... 4 Typical Composition of Untreated Domestic Wastewater ................................... 5 House Count Result with Field Verification (Based on 1998 Aerial Maps) ......... 6 Population Projection ......................................................................................... 7 Projected Residential Wastewater Flow ............................................................. 8 Water Consumption Data (Lake Section Water Company) ................................ 8A Typical Water Consumption Data for Single Family Residential ...................................... 9 Influent Wastewater Strength for the Proposed Chaparral ................................ Wastewater Facility ........................................................................................... 10 Proposed Treatment Plant Capacity ................................................................................ 11 Total House and Lot Projections in the Core Area .......................................................... 12 Distribution of Causes for Service Calls on Pressure Sewer System .............................. 13 Normal and Preventive Maintenance for Vacuum Sewer System ................................... 14 Minimum Acceptable Slopes of Gravity Sewer Line ........................................................ 15 Maximum Manhole Spacing ............................................................................................ 16 Summary of Gravity Sewer Lift Stations .......................................................................... 17 Treatment Process Design Criteria.................................................................................. 18 Design Summary of Advanced Facultative Pond Treatment Alternative ......................... 19 Design Summary of Sequencing Batch Reactor(s) Treatment Alternative ...................... 20 Operation and Maintenance Requirements of SBR Facilities .......................................... 21 Design Summary of Bio-Tower Treatment Alternative..................................................... 22 Operation and Maintenance Requirements of Bio-Tower Facilities ................................. 23 Crop Water Consumption - Alternate Surface Irrigation Area # 1 .................................... 24 Crop Water Consumption - Alternate Surface Irrigation Area # 2 .................................... 25 Crop Water Consumption - Alternate Surface Irrigation Area # 3 .................................... 26 Crop Water Consumption - Alternate Surface Irrigation Area # 4 .................................... v III-6 III-7 IV-14 IV-17 IV-24 IV-27 IV-30 IV-31 IV-32 IV-32 IV-34 V-2 V-5 V-11 V-19 V-20 V-23 V-27 V-35 V-41 V-44 V-47 V-50 V-58 V-58 V-59 V-59 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF TABLES Table No. Title Page No. 27 Crop Consumption Comparison to Future Plant Effluent Discharges .............................. 28 Surface Irrigation Site Water Allocation ........................................................................... 29 Operation and Maintenance Requirements of ................................................................ Underground Re-injection Facilities ................................................................... 30 Summary of the Collection System Alternative Capital Costs ......................................... 31 Summary of the Collection System Alternative ................................................................ Annual Operation and Maintenance Costs ......................................................... 32 Equivalent Uniform Annual Cost - Collection System Alternatives .................................. 33 Summary of the Treatment System Alternative Capital Costs ......................................... 34 Summary of the Treatment System Alternative .............................................................. Annual Operation and Maintenance Costs ......................................................... 35 Equivalent Uniform Annual Cost - Treatment System Alternatives.................................. 36 Summary of the Effluent Disposal Alternative Capital Costs ........................................... 37 Summary of the Effluent Disposal System Alternative ................................................... Annual Operation and Maintenance Costs ......................................................... 38 Equivalent Uniform Annual Cost - Effluent Disposal System Alternatives ....................... 39 Summary of Annual Power Consumption Costs - ........................................................... Collection System Alternatives ........................................................................... 40 Summary of Annual Power Consumption Costs - .......................................................... Treatment System Alternatives .......................................................................... 41 Summary of Annual Power Consumption Costs - .......................................................... Effluent Disposal System Alternatives ................................................................ 42 Final Ranking of Wastewater Collection, Treatment and ................................................ Disposal Alternatives .......................................................................................... 43 Proposed Sewer Collection System ................................................................................ 44 Proposed Treatment Process and Equipment Sizes ....................................................... 45 Proposed Surface Irrigation Process and Equipment Sizes ............................................ 46 Design Criteria - SBR Process ........................................................................................ vi V-60 V-61 V-64 VI-2 VI-3 VI-4 VI-5 VI-6 VI-8 VI-9 VI-10 VI-11 VI-15 VI-15 VI-16 VIII-2 VIII-3 VIII-4 VIII-5 VIII-9 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF TABLES Table No. Title Page No. 47 Proposed Construction Phases and Estimated Capital Costs ......................................... 48 Preliminary User Charge System - ProForma #1 ............................................................ 49 Preliminary User Charge System - ProForma #2 ............................................................ 50 Preliminary User Charge System - ProForma #3 ............................................................ 51 Summary of Three Financial Feasibility Analysis (ProForma) ......................................... 52 Estimated Individual Property Owner Costs .................................................................... 53 Cost Summary of Chaparral Wastewater Facility ............................................................ 54 Summary of Capital and O&M Costs per Customer ........................................................ (at the end of each phase) ................................................................................. 55 Costs of Treatment Per 1,000 Gallons Per Day ............................................................. (at the end of each phase) ................................................................................. 56 Proposed Implementation Schedule ................................................................................ 57 Facility Staffing Requirement (at the end of each phase) ..................................... vii VIII-15 VIII-22 VIII-26 VIII-30 VIII-34 VIII-35 VIII-35 VIII-37 VIII-38 VIII-40 VIII-44 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF FIGURES Figure No. Title Page No. 1 2 EX-1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Project Location Map .......................................................................................... Wastewater Facility Plan Area ............................................................................ Overall Project Layout ........................................................................................ Chaparral Lot Density ......................................................................................... Topographic Map ............................................................................................... Flood Plains Map ................................................................................................ Existing Land Use Map....................................................................................... Well Locations .................................................................................................... Proposed Land Use Map .................................................................................... Population Projection ......................................................................................... Typical Residential Pressure Sewer Service Installation & ................................ Typical Pressure Sewer Force Main Profile ........................................................ Pressure Collection System Layout .................................................................... Typical Residential Vacuum Sewer Service Installation & ................................. Typical Vacuum Sewer Main Profile ................................................................... Typical Vacuum Pump Station ........................................................................... Vacuum Collection System Layout ..................................................................... Typical Residential Gravity Sewer Service Installation & .................................. Typical Gravity Sewer Main Profile ..................................................................... Gravity Collection System Layout ....................................................................... Gravity Sewer Lift Station Boundary ................................................................... Typical Gravity Sewer Lift Station Layout ........................................................... Advanced Facultative Pond Treatment Facility Layout....................................... Alternate Treatment Sites- Advanced Facultative Pond Process ....................... Sequencing Batch Reactor Treatment Facility Layout........................................ Alternate Treatment Sites- SBR Process ........................................................... Bio-Tower Treatment Schematic Diagram .......................................................... Surface Irrigation Wastewater Disposal Alternative ............................................ viii I-2 I-4 II-8 III-4 IV-2 IV-4 IV-11 IV-13 IV-23 IV-28 V-4 V-8 V-10 V-13 V-16 V-18 V-24 V-25 V-26 V-33 V-36 V-42 V-43 V-49 V-53 25 Surface Irrigation Alternate Sites ........................................................................ V-54 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF FIGURES Figure No. 26 27 28 29 30 31 32A 33 34 Title Page No. Underground Re-injection Wastewater Disposal Alternative .............................. Alternate Re-injection Field Locations ................................................................ Evaporation/Infiltration Wastewater Disposal Alternative ................................... Evaporation/Infiltration Wastewater Disposal Site .............................................. Sequencing Batch Reactor Treatment Process Diagram ................................... Hydraulic Profile ................................................................................................. Wastewater System Schematic Flow Diagram ................................................... Gravity Sewer System Layout - Phasing Plan .................................................... SBR Treatment Plant - Construction Phasing .................................................... ix V-65 V-66 V-70 V-71 VIII-6 VIII-7 VIII-8 VIII-13 VIII-14 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF FOOTNOTES* * Footnote numbers in the Facility Plan refers to the references listed below. 1. Doña Ana County Comprehensive Plan, 1995-2015, Doña Ana County, New Mexico, November 1994 2. Doña Ana County Wastewater Facilities Master Plan, Molzen-Corbin & Associates, February 1997 3. Doña Ana County Regional Water Plan, New Mexico State University, New Mexico Water Resources Research Institute, Elephant Butte Irrigation District, Doña Ana County, City of Las Cruces, August 1994 4. New Mexico Water Quality Control Commission Regulations, New Mexico Water Quality Control Commission, Amended November 15, 1996 5. Corbitt R. A., Standard Handbook of Environmental Engineering, McGraw-Hill, 1990 6. Soil Survey of Doña Ana County Area, New Mexico, USDA Soil Conservation Service in cooperation with US Department of Interior, Bureau of Land Management, and the NM Agricultural Experiment Station, August 1980 7. Soil Survey of Otero Area, New Mexico, USDA Soil Conservation Service in cooperation with the New Mexico State University Agricultural Experiment Station, June 1981 8. Frenzel P.F., Simulation of Ground Water Flow in the Mesilla Basin, Doña Ana County, New Mexico, and El Paso County, Texas, U.S. Geological Survey, Supplement to Open-File Report 88-305, 1992 9. Transboundary Aquifers of the El Paso/Ciudad Juarez/Las Cruces Region, Texas Water Development Board, New Mexico Water Resources Research Institute, October 1997 10. New Mexico Air Quality 1994-1996, State of New Mexico Air Quality Bureau, 1996 11. 302A Final Report, Doña Ana County, 1995 12. Chaparral Schools Wastewater Treatment & Disposal Study, Gadsden Independent School District, The Trebor Group, March, 1997 13. Wastewater Engineering, Treatment, Disposal, Reuse, 3rd Edition, Tchobanoglous G., and Burton F. L., Metcalf & Eddy, Inc., 1991 14. Alternative Wastewater Collection System, USEPA, EPA/625/I-91/024, October, 1991 15. Manual of Wastewater Treatment/Disposal for Small Communities, USEPA, EPA/625/R-92/005, x September, 1992 Wastewater Collection and Treatment Facility Plan Community of Chaparral, New Mexico LIST OF FOOTNOTES* * Footnote numbers in the Facility Plan refers to the references listed below. 16. Guidelines for Wastewater Collection and Treatment Works in New Mexico, New Mexico Environment Department, February 1987 17. Microbiology, Operation and Troubleshooting the Aerated and Facultative Wastewater Treatment Ponds, M. Richard, PhD., presented at the NSF Advanced Integrated Wastewater Pond System Workshop, Colorado State University, Ft. Collins, CO, July, 1994 18. Environmental Engineering, H.S. Peavy, D.R. Rowe, G. Tchobanoglous, McGraw-Hill, 1985 19. Salinity and Nitrogen Specific Report Information Request for Chaparral, New Mexico, Robert Flynn, PhD, New Mexico State University, Agricultural Science Center at Artesia, New Mexico, May 5, 1999 20. Toxicity Reduction Evaluation Plan, NPDES Permit Negotiations, and Water Resources Management Plan, City of Las Cruces, Montgomery Watson, March 1995 21. Water Treatment Plant Design, 3rd Edition, American Water Works Association, American Society of Civil Engineers, McGraw-Hill, 1998 xi
