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HomeMy WebLinkAboutResolution - 4706 - Interlocal Agreement - TTU - Elvaluation Of Land Application Sludge, WTP - 01_12_1995Resolution No. 4706 January 12, 1995 Item #39 BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK: THAT the Mayor of the City of Lubbock BE and is hereby authorized and directed to execute for and on behalf of the City of Lubbock an Interlocal Agreement with Texas Tech University for Evaluation of Land Application of Sludge produced by the City of Lubbock Wastewater Treatment Plant, attached herewith, which shall be spread upon the minutes of the Council and as spread upon the minutes of this Council shall constitute and be a part of this Resolution as if fully copied herein in detail, and further ratifying and approving two Letter Agreements with Texas Tech University for preliminary work on this project dated January 19, 1994, and May 16, 1994, attached herewith, which shall be spread upon the minutes of this Council and as spread upon the minutes of this Council shall constitute and be a part of this Resolution as if fully copied herein in detail. e &qC Passed by the City council this 12 day ATTEST: Betty NY. Johnson City gecretary APPROVED AS TO CONTENT: Terry Ellerbrook, Director of Water Utilities APPROVED AS TO FORM: G. Vandiver, First Assistant City dp:codocs\sludge.res December 14, 1994 Resolution No. 4706 January 12, 1995 Item #39 STATE OF TEXAS § § INTERLOCAL AGREEMENT COUNTY OF LUBBOCK § WITNES ETH: The parties to the agreement are the City of Lubbock, Texas (hereinafter CITY) and Texas Tech University (hereinafter TTU). TTU shall use its best efforts to complete the tasks outlined in the August 19, 1993, proposal by TTU, and Letters of Agreement dated January 19 and May 16, 1994, for preliminary work on this project. All of which documents are attached hereto and made a part hereof for all intents and purposes. The period of performance under this agreement is on -going and shall continue through 31 December 1995. a. In consideration for the performance of the work set forth in Article 1, CITY agrees to pay to TTU the additional amount of $103,937 for the remaining tasks to be performed. TTU shall prepare a final report for delivery to the CITY, and shall present such report and findings to the City Council and to the Texas Natural Resources Conservation Commission if requested to do so by the CITY. b. Payment shall be made from current revenues of the paying party according to the following schedule: 15 January 1995 1 June 1995 $80,000 $23,937 C. Checks shall be made payable to Texas Tech University and mailed to: Ted Johnston Grants and Contracts Accounting Texas Tech University Lubbock, Texas 79409-1105 This contract may be terminated by either party upon thirty days written notice to the other party. Each party hereto agrees to hold the other party harmless from any claim for damages arising out of the acts or omissions of its own agents or employees to the extent permitted by the Constitution and laws of the State of Texas. IN WITNESS WHEREOF, the parties have Januqx7----, , 1995. Donald R. Haragan` u Executive Vice President and Provost ATTEST: &tt-AAc�'Z'rr' Betty M. Johnso , City Secretary APPROVED AS TO CONTENT: Terry Elle rook, Managing Director Water Utilities APPROVED AS TO FORM: i Dbdald G. Vandiver, First Assistant City Manager dp:cityadU-TTU.Doc December 14,1994 Proposal to Research Evaluation of Land Applying Sludge to City of Lubbock Lubbock, TX by `Clifford B. Fedlear John Borrelli Richard E. Z unman 'Civil Engineering Department Texas Tech University Lubbock, Texas 79409-1023 August 19, 1993 Revised: April 22, 1994 FILE C1`1011 Evaluation of Land Applying Sludge I; f FN The overall objective of the proposed research is to develop and evaluate a system for the land application of stabilized sludge produced at the City of Lubbock wastewater treatment plant to land such that the total available stabilized sludge storage required for management, of the treatment system is minimized. To understand the full scope of this project, the proposal is broken down into 4 phases. The first phase includes the absolute minimum work required to complete the stated objective for a single crop where secondary effluent is used for irrigation. Phase 11 includes the work from Phase I and the work required to analyze two additional craps, such as winter wheat and sorghum. Phase III duplicates the work of Phase I with the use of groundwater for irrigation as opposed to the secondary treated effluent. Phase IV provides the level of effort in sampling analysis that is required for the project results to be able to publish the results in a scientific journal and withstand total expert witness criticism. This objective will be accomplished by meeting the following specific tastes for each of the Phases involved. PHASE I 1. Apply the City of Lubbock's stabilized sludge to land and to evaluate the level of sludge application for a balanced nutrient system for growing alfalfa. 2. Evaluate the change in physical properties of the soil when sludge is applied to the land where secondarily treated effluent is used for irrigation. 3. Provide a plan for alternate cropping patterns for both the short term and the long terrm. This plan will include a) what crops to grow, b) yearly planting schedule, and c) the long term crop rotation based on data collected as part of this research or found in the literature. 4. Complete a simulation model of the water and nutrient loading, mmmrient release rates, and the nutrient use rate by crops. The nutrients to be considered will include nitrogen, potassmnt, and phosphorous. S. Specify the management required to ensure an, environmernally safe operation of a) a land treatment system for stabilized sludge, and b) a combined sludge and wastewater land treatment system. This task includes providing recommendations for the rates and scheduling of sludge application. 6. Prepare interim and final reports, and to assist the City of Lubbock with presanations concerning the operation of the land treatment system. PHASE H 1. To apply stabilized sludge to land where several crops are grown and to evaluate their response to the same criteria to be used in Phase L These crops will be agreed upon by personnel of the City of Lubbock that currently manage and operate the land application site. Fedler at al., City of Lubbock Proposal - Sludge.cbf PHASE IH Page 2 of 5 L To analyze the effects of applying stabilized sludge to soil where groundwater (where available) Is used for irrigation. 1. Collect the necessary data from the individual tests Bated in the three phases of the project to be able to verify all aspects of the research required for publication of the results in the research community. This data is a dremeely important in totally verifying the results of the study since it will include the necessary background information and continued monitoring to verify incremental changes that occur during testing. Much of the technology required for this study is available in the technical literature. Information that is lacking is the consolidation of this technology and site specific information, such as reactions rates within the local soil. The management plan will be developed based on information obtained in the literature, modeling of physical processes, and analyses from local field tests. Land: The system requirements will be specified for that when secondarily treated municipal wastewater effluent or groundwater is used for irrigation according to which phases of the project are to be completed and agreed upon by appropriate personnel. The general criteria driving site selection will be based on the EPA published criteria for soil and topography for both sludge and secondary effluent application. Sludge Storage: Sludge storage is primarily a function of the tillage cycle and practices. Cropping patterns change with different crop combinations and crop growing season requirements. To determine the optimum cropping pattern tillage cycle, various crops and planting dates will be evaluated in the management simulation. For example, corn can be grown during a 210 day period in Lubbock. However, it takes only about 120 days for corn to mature. The planting season, thus the sludge application, can extend over a 90 day period. For sludge applied to alfalfa, application can occur nearly every month depending on winter pasturing of the alfalfa. The type of crop chosen will be consistent with current farming operations, and best practices for sludge application as approved by City personnel. Cycling of amps is a function of land use efficiency and crops chosen. For a sludge application operation, a small decrease in land use efficiency (% time when crops are growing in the field) could be justified to ensure an appropriate window of opportunity when sludge can be applied to the land. With only about 45 days when no photosynthetic activity occurs in plants, it would be possible to plant two crops and expect adequate ground cover during a window of approximately 9 months per year (two 45 d periods for no plant activity). Requirements for proper scheduling of sludge application are cropping alternatives that consider times of sludge application, ground cover for wind and water erosion protection, probability of precipitation, nutrient uptake by the various crops, tillage, and crop harvesting. Evaluation of the cropping pattern will be a key in determining sludge storage requirements. Many of the other operational eonsmdn s, such as mitrient uptake and loading rates will be tied to the chosen crops and their respective cropping Pattern. Fedler et al., City of Lubbock Proposal - Sludge.cbf Page 3 of 5 Nutrient Utilization: Nutrient uptake will be a function of the cropping pattern. While the seasonal uptake of nutrients is readily available in the literature, it will not provide all the information needed to complete a mass balance on those nutrients. Models will be found which will provide monthly and/or weekly uptake of nutrients. These models will be used to match nutrient uptake with nutrient availability and the results of these models will be used to evaluate potential cropping patterns and risk of leaching nutrients. Nutrient Release Rates In Sludge: To provide propel managemen and ensure no excess leaching of nutrients to the groundwater, nutrient release rates from the applied sludge will be needed. Models to predict nutrient release from sludge exist, therefore will ber used in this study. In addition, we have available at Texan Tech a model for residue decay that can be used. Logistics: Schedules will be developed for the storage, transport, and application of sludge. These schedules will be used to help determine sludge storage requirements and field equipment needs to minimize the potential for nuisance problems. 02 W14 ;J DI. u Replicated field plots will be established to determine how sludge may change the physical characteristics of the soil. From the literature, it has been found that additions of high rates of organic matter will increase soil tilth, increase soil aggregation, and increase bulk density. To test those factors, penetration tests and bulk density sampling will be performed on the soil in the plots. Sludge application rates suggested are 0, 4, 8, 12 and 20 tons of dry sludge per acre and will be applied in conjunction with current farming practices. "The plot size will be approximately 20 ft by 20 ft or to the nearest row spacing. Depending on the crop grown, sludge will either be tilled into the soil at the first window of opportunity or applied to the surface. Each plot will be replicated three times and will be secured from potential runoff with a small soil dike. MANAGEMENT SYSTEM To ensure that there is a minimal risk for groundwater pollution, there must be a high level of u>anagemeret, especially with respect to irrigation practiced. In Lubbock, you can use supplemental irrigation (provide less than the optimum amount of irrigation water) such that less than one inch of leaching is allowed. While this strategy would ni ni, mica deep ' percolation and the potential for groundwater pollution, it would cause a potential for an ac=muladw of salt in the soil. A good management system, with respect to irrigation water, needs to balance or reach a compromise on adequate water for crop growth, nutrient recycling, leaching, the amount of nutrients reaching the groundwater, and the treatment of the sludge and/or wastewater. In order to develop this management system, k will be necessary to complete an analysis of the water distribution pattern and efficiency for the irrigation system used in the study. A complete water balance must be maintained at all times using irrigation scheduling. Irrigation scheduling merely performs the water balance on a daily basis as opposed to just applying a given amount according to a given monthly schedule based on long term average data. It tells the operator when to irrigate and how much to apply. By doing this, the amount of water reaching the groundwater is Fedler et al., City of Lubbock Proposal - Sludge.cbf Page 4 of 3 'controlled while achieving near optimum crop growth and nutrient removal. Leaching due to irrigation can be controlled. Even precipitation can be controlled with respect to its potential to cause leaching within reason, by maintaining storage in the soil so that if precipitation occurs, there is a place to store it. Irrigation scheduling could be especially effective where groundwater is used for irrigation and water is available on demand. The cost for good scientific irrigation scheduling can generally be paid for by the increased crop production. RFS'A,RCH PLAN To accomplish the objectives, the following outlines a series of tasks that will be completed. Task 1: Determine the quality, quantity, and design parameters of the sludge, wastewater, groundwater, and soil. In addition, current climatic variables (wind, precipitation, solar radiation, humidity, and temperature) for the location will be collected. The above information is needed for the various balances and modeling. Task 2: Select the various crops that can be grown and determine their potential growing seasons, rates for biomass production, nutrient uptake over time, and agronomic needs. Evaluate the suitability of the crops for use with sludge and/or secondarily treated effluent or with typical groundwater used for irrigation. Task 3: Determine the appropriate model for nutrient uptake pattern for the crops and nutrient release from the sludge. Task 4: Perform nutrient balances for the various craps and for various sludge applications. Select potential crops and application schedules that appear to provide an adequate balance between nutrient availability and nutrient uptake. Task 5: Simulate the application of sludge to determine the sludge storage and land required. This simulation will include application of sludge to the City's current land application site. Task b: Develop a water and nutrient management plan for a) application of the sludge with wastewater, and b) application of the sludge using groundwater if available. Task 7: Summarize the environmental rislm and design data in order to prepare summaries for use in cost evaluatiom. Value added from the sludge will be based on current value for the three primary required crop nutrients,- nitrogen, phosphorous and potassium Task 3: Prepare a glossary of definitions of terms used so that there is no misunderstanding of the management plan developed. Fedler et al., City of Lubbock Proposal - Sludge.cbf Page 5 of 5 W"We Faculty participants on the project will include Clifford B. Fedler, John Borrelli, and Richard E. Zartman. Clifford B. Fedler expertise includes modeling of natural process, biological process for wastewater treatment, environmental engineering, and project land application of wastewater. John Borrelli has expertise in irrigation, water use by crops, land application of wastewater, and irrigation scheduling. Richard E. Zartman expertise is in soil physics, sludge application to land, leaching, and erosion. BUDGET EXPLANATION The emphasis of this project is to collect data and analyze that data as to the safe disposal of wastewater sludge on land, which requires the personnel time as shown in the budget. Since the foil extent of data desired is questionable, the proposed budget has been developed to allow the funding agency the choice of project to coincide with the different phases of the overall project. Details of the sampling costs are as follows. For Phases I and III (separately), the metals and nutrient samples will consist of 4 background samples of the soil and one of the sludge and wastewater effluent that will consist of the full detailed analysis at a cost of $300 per sample. At the conclusion of the tests, triplicated samples will be analyzed for each of the four treatments and three of the sludge, all at a reduced level of analysis at a cost of around $150 per sample. The plant tissue analysis will costs around $250 per sample and will consist of four samples from the four treatments. The acute bioassay analysis will consist of two background soil samples and duplicate samples for each of the treatments at the conclusion of the tests. For Phase H, the additional crops being analyzed will require additional sample analyses. For the complete metal and nutrient analyses there will be one &ample per treatment for background and two of the sludge. Reduced level analyses to be conducted will be triplicated for each treatment plus triplicated sludge samples throughout the test period. The plant tissue analysis will be similar to Phase I, except that there will be two crops instead of one. To keep the acute bioassay analysis to a minimum, only single samples will be conducted per crop and per treatment. Phase IV contains the higher level of sample analyses and does not stand alone, but is incorporated with the initial or base project. The level of sampling for metals and nutrients will include duplicate samples at the full level and analyses for the four treatments and fan on the sludge. Reduced analyses will include one sample per each of four treatments six, times throughout the project. In addition, to better track any movement of metals or nutrients within the soff profile, each treatment will be analyzed twice (before and after the study) during the study and five different depths. Plant tissue analysis will consist of duplicated samples for the four treatments at the complete level of analysis and a series of four samples per treatment throughout the test period at the reduced level of analysis. The acute bioassay analysis will be conducted in duplicate for the four treatments for the background and two additional samples per treatment during the test period. -The various sample analyses are important for the mass balance of each waste constituent present in the sludge. By completing the sample analyses at the Phase IV level, we leave no question in a reviewers mind as to where a particular constituent resides. TEXAS TECII U N I V E It S I T Y DEPARTMENT OF CIVIL ENGINEERING Box 41023 Lubbock, TX 79409-1023 Telephone (806) 742-3523 FAX (806) 742-3488 January 19, 1994 Henry Day City of Lubbock P. O. Box 2000 Lubbock, TX 79457 RE: Letter of Agreement Dear Mr. Day: I would like to present to you this Letter of Agreement for the services listed below to be completed as the initial research work proposed by myself and Drs. John Borreili and Richard Zartman in the proposal titled "Evaluation of Land Applying Stabilized Sludge." The cost of this initial research is $5,000.00 to be paid to Texas Tech University and send the check and a copy of this letter to Dr. Kathleen Harris, Office of Research Services, Texas Tech University, Lubbock, TX 79409-1035. The grant will include support to a graduate student that will a) conduct the preliminary research of the extent of land applying stabilized municipal wastewater sludge on slightly alkaline soils, b) design the experimental layout of the test plots, c) collect background soil samples for analysis, d) coordinate and assist with site preparation of the test plots, e) assist with planting of the test plots, f) apply sludge to test plots, and g) collect samples of sludge for constituent analyses. This research is the initial part the project we will jointly submit to the TNRCC and the TWDB for continuted support. The budget presented will support a graduate student that will be committed to working for 20 hours per week at a monthly part-time salary of $750 (total of $3,375) plus the fringe benefits of $1,625 for a total of $5,000. This work is required if the City expects their requested results of the overall project in January 1995 and will extend into through the summer. Thank you for your support of this research. Sincerely, C4. � .- Clifford B. Fedler, Ph.D., P.E. Associate Professor CBF/bg An Aff7rRmatim Action Irwitulton CONTROL GROUP ENTRY DATE 1099 DOIICRIIMrTEABWETF NIE-PQRAODOIMITiNBIIBECIR.Y r.e VsL I VENDOR NO. CITY OF LUBBOCK D.P.R. - TO: 68K no New" AiaDRM A J B o ! O a 3 DIRECT PAYMENT REQUEST CITY La d a'aG 8TATEtie, ap I nY6 `j yv3 swrs I f-f ,Vs, D, { l�'At'h1c eN k �s� ©FF�cc o,� iP�sc i c S�/t c s PLANATION /plvp TN 17"! r� I+ •rc. w R k' ,��' �" �� G u ,-s ,�,! GATE /— 1-:2 - f DEPT. &V1 e-rG BLANKET ORDER & I ..M;u • TOTAL. (Plwf al;wh Mnoun W o ppoi l" d" Date Approved Y Sl Mdwe of IndWWud Autla �o2 o Phone 6A. INVOKE NUMBER INVOICE DATE GROSS INVOICE AMOUNT DISCOUNT LINE NET EXPENSE DISTRIBUTION ACCOUNT FUND ACCOUNT CENTER PROJECT TEXAS TEGILIJI U N I V E R S I T Y DEPARTMENT OF CIVIL ENGINEERING Box 41023 Lubbock, TX 79409-1023 Telephone (806) 742-3523 FAX (806) 742-3488 Mr. Henry Day City of Lubbock Water Utilities Operation P.O. Boa 2000 Lubbock, TX 79457 RE: Letter of Agreement Dear Mr. Day: May 16, 1994 I would like to present to you this Letter of Agreement for the services listed below to be completed as the second phase of the research work proposed by myself and Drs. John Borrelli and Richard Zartman in the proposal titled 'Evaluation of Land Applying Stabilized Sludge.' The cost of this second phase of research is $25,000 to be paid to Texas Tech University and the check along with a copy of this letter should be sed to Dr. Kathleen Harris, Office of Research Services, Texas Tech University, Lubbock, TX 79409-1035. This phase of the overall research project will cover the work through 31 September 1994 and will include the following activities: a) coordinate the application of sludge to the various test plots at the Land Application Site, b) collect various samples of sludge, soil, and combination samples for analyses of constituents as outlined in the proposal (this will include analyses for plant nutrients, metals in the sludge, and the background bioassay analyses), c) weekly samples analyses for soil pH, d) weekly collection of weather data at the application site, and e) collection and analyses of plant tissues samples for all crops and each level of sludge application, This research is the second phase of the overall project The cost presented will support the current half-time graduate student committed to wow 20 hrs/week at a monthly salary of $750 (excluding fringe benefits). In addition, $6,000 will be allocated for bioassay and constituent sample analyses, $1,000 for miscellaneous supplies, and a pan -time undergraduate student to assist with the field work and sample analyses. With the 15 % indirect costs added and the fringe benefits, the total costs to cover the expenses through 31 September 1994 is $25,000. Thank you for your support of this research. If you hive any questions concerning the work to be completed, please let me know. I can be reached directly at 742-2801. Sincerely, C Cliffs . Fedler, Ph.D., P.E. Associate Professor CC. John Borreth Richard 7artman Kathleen Harris W. Dent Wray An Af»natiwAaOn hwUution IP IVeL I W I Y VI' l`Uubt,Wh `/.If Base A. NAME 22nX Z,,"c r5l t wr +VcA .r , t DIRECT PAYMENT �� f'— TO: �"Lfto W* REQUEST ADDRESS ' U 46 0 X_ / Q .21 DEPT.+yjr,:�iK CITY �1$f� STATE _ZIP -3 sTSBLANKET ORDER 8 REL yYA,; +r R /�R -tj fZ Aj 14,*xef t jr j D Ft j c c s F ec Sc.m 4 ► c c .S EXPLANATION :Ce C al J✓ J- � "f�H S —C �? % fia� � ,�, r G /Si WU �.lC 4-44- is t ! a Ae CONTRACT NO. (Pim" attach r mPPoning daW TOTAL t• Apprewed Propered BV Signature of lndWual Authorized Phone.Ext. INVOICE NUMBER v INVOICE DATE - 9v3 GROSS INVOICE AMOUNT DISCOUNT LINE NET EXPENSE DISTRIBUTION -7? 33 ACCOUNT FUND ACCOUNT CENTER PROJECT o o 0 4V I VENDOR NO. PAY r TO THE RFar To ADDRESS: ORDER �v BMX Lf Ion 3 ull' if Ur L.unnva.a. DIRECT PAYMENT REQUEST DPR 02951 Date 9- Dept L 14Af/C 9CL ftywast j OF: CITY. 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