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03-30-1987 (City Council) Agenda Packet etK& ,pottee3 2417 Pd_ '1;00p rn. AGENDA CALLED MEETING CITY COUNCIL CITY OF WYLIE, TEXAS MONDAY, MARCH 30, 1987 7 :00 P.M. COMMUNITY ROOM 800 THOMAS STREET CALL TO ORDER INVOCATION ORDER OF PAGE BUSINESS REFERENCE BUSINESS 1 1-6 Consider approval of payment for damages to Richard Parker for sewer incident in the amount of $277 .62 . 2 7-end Consider approval of letter of intent to Texas Water Commission on new wastewater treatment plant. 3 ADJOURN INVOICE • SerViCeMASTER, ServiceMaster of Coffin' Creek 1410 Summit, Suite 5 Piano, Texas 75074 214-424-4529 j A'_ • HARGE Z 7 7 62 To Richard Parker z 900 Kirby Wylie, Tx. 75098 :IJSTOMERNO. CUSTOMER P.O.NO. :; ', .; A.O.B.NO. BUILDING NO.-BRANCH NO. `INVOICE NO .:,'INVOICE DATE 589265 1-28-87 1;4, 7, � e�1t e. :'AMOUNT _RVICES: CONTRACT JANITORIAL SERVICES "SPOTLIGHT" CARPET MAINTENANCE OTHER Restoration Services following water damage in office building Pad Removal 126.00 Mildew treatment 45.63 Fan Rental - 4 for 2 days 128.00 New Pad 177.45 Relay Carpet �AS L DUl o 398.00 Carpet Cleaning 153.00 Sales Tax WE WOULD APPRECIATE YOUR 74.54 PAYMENT TODAY' THANK YOU FOR THE OPPORTUNITY TO SERVE. 'To ACE-•-► $ w lo2sz Received - 250.00 68457 REV.0885 AM ACCOUNT RECEIVABLE Tbtalfate 853.62 NOTICE OF CLAIM AGAINST THE CITY OF WYLIE, TEXAS PERSONAL INJURY - PROPERTY DAMAGE File this claim within 45 days of the injury or property damage with: CITY SECRETARY CITY OF WYLIE, P. O. BOX 428 WYLIE, TEXAS 75098 eC-4/41,ei - <7/ Please print fu 1name Telephone Numbers gt2( 307 C/v'/ Z�r' Mailing Address City, State, Zip The TOTAL amount of your claim agai the city ii: ($) (Use other side for details) Describe in your own words WHERE, WHEN, and HOW the damage or injury occurred. Attach additional pages if necessary. Give names and addresses of others involved if known. Location: 0 O /_/3 s Pm Date: /_ � � _ O 4, Approximate Time (AM/PM) : 1 _0/ g fj►m zae tau !-/49-ge/ J � 45 Give details of your claim against the City. Attach copies of any repair estimates, medical reports, etc. ALL THE STATEMENTS MADE IN THIS CLAIM ARE TRUE AND CORRECT TO THE BEST OF MY KNOWLEDGE: /-(S"-g" Date ignature of Claimant Article 10, Section 8 - Damage Suits of the Charter of the City of Wylie states before the City shall be liable for any claim for damages for the death or personal injuries of any person or for damages to property, the complainant or his authorized representative shall notify the City Secretary. The notification shall be in writing and shall state specifically how, when and where the death, injury or damage occurred; the amount of loss claimed; and the identity of any witnesses upon whom it is relied to establish the claim. The notification shall be filed within forty-five (45) days of the date of injury or damage or, in the case of death, within forty-five (45) days of the date of death. The failure to so notify the City within the time and manner specified shall exonerate, excuse and exempt the City from any liability whatsoever. No action at law shall be brought against the City until at least sixty (60) days have elapsed since the date of notification. MEMORANDUM TO: Jaynes Johnson, Finance Director FROM: H. K. Powell, Inspector RE: Water Damage at 900 W. Kirby DATE: January 14, 1987 The damages that I observed were substantial, however I feel that if they act swiftly that they can vaccurn the water out before there is permanent damage. There was no odor from the sewer water therefore I feel that the carpet is salvagable. "7� c ADJUSTERS ,OF DALLAS (214) 226-2166 P.O. Box 28841 Dallas, Texas 75228 January 21, 1987 The City of Wylie P.O. Box 428 Wylie, Texas 75098 Attn: Mr. James Johnson - Finance Director Re: Sewer Stopage 1/13 & 1/14/87 900 Kirby Wylie, Texas Richard Parker Dear Mr. Johnson: As indicated on our visit of 1/16/87, I could not find any negligent operation on the part of the City of Wylie. Therefore, the claim was denied that date in person to Mr. Richard Parker. I have at this time forwarded formal denial to Mr. Parker, and requested that any inquiries concerning the claim fran his company be directed to our offices. I am also attaching photo of the building to go with your photos of the interior, and I am also attaching a review of the damages suffered by Mr. Parker. Thank you for letting us be of service to you on this loss. Sincerely, Bob Medlin Frontier Adjusters ctr ARIZONA • CALIFORNIA • COLORADO • FLORIDA • HAWAII • IDAHO • IOWA • KANSAS • MISSOURI MONTANA • NEBRASKA • NEVADA • NEW HAMPSHIRE • NEWMEXICO • OHIO • OREGON TEXAS • UTAH • WASHINGTON • WISCONSIN I WYOMING alviOrdiet/JUSTERS .of DALLAS (214) 226-2166 . Box 28841 Dallas, Texas 75228 January 21, 1987 Mr. Richard Parker 900 Kirby Wylie, Texas 75098 Re: Sewer Backup of 1/13 & 1/14/87 Dear Mr. Parker: On 1/16/87, I visited with you and made an inspection of your damages and an investigation into the cause of the loss captioned above. As indicated on that date, it is regretful that the damages occurred, but in the investigation it was felt that the City of Wylie had no respon- sibility for the damages. As indicated on that date, the damages to your building at 900 Kirby should be turned in to your insurance carriers. If, in their investi- gation, it is felt that there is responsibility, they should be in con- tact with our office. Sincerely, Bob Medlin Frontier Adjusters BWcb ARIZONA • CALIFORNIA • COLORADO • FLORIDA • HAWAII • IDAHO • IOWA • KANSAS • MISSOURI MONTANA • NEBRASKA • NEVADA • NEW HAMPSHIRE • NEWMEXICO • OHIO • OREGON TEXAS • UTAH • WASHINGTON • WISCONSIN • WYOMING it it {i Oa, ��x BOB MEDLIN ? n ADJUSTERS of Dallas DATE r b P.O. Box 28841 I—it a Dallas, TX 75228 (214)226-2166 PO Y NURBER /CLAIM NO. IN;RE►: W /_ r /coMPpj4Y/A .-- LOCATI N / r. �_ • • / REPAIR SPECIFICATIONS ANTITY AND UNIT TOTAL (Location in building,measurement of area,operation to be COST performed,identify materials and dimensions) UNIT 1111.4,41 eiL42.11...‘ °Wo r. ? ,1 , r gtort_e ia ,,,, ,, ' rA,L,.' V r 7 Vtlit0 i 1 1 y.s......e.s.z.„ 09 . f!, V 3 dote' ELle,,,L, 0,:. I. 6 4. _I4- ifr-ai z c, , 6et7 l.-, ,. , , $ ,- 30'2= 7r ' f�} t SY2 04:4:et b' ►S`yL /I1_ I 3i3 ' je.....t a �2 1 t._ 22/2 ...]L— SUB TOTAL CT 3 �'�— SQUARE FOOTAGE REPLACEMENT COST et The adjuster has D " �` �N I,. i pc ti The undersigned contractor agrees to complete and explained the scope `_INV i , 'n�Ss � guarantee the above repairs for the total price of S of the repairs to U r THIS IS OT AN ORDER T REPAIR the and he/sheshe agrees agrrees with Contractor it /41 ` J TOTAL /D_J- 6� Date � J Adjuster T (AdjustersInmal wuSA MEM PROJECT NUMBER 7X Vac/ 80 SHEET_Lop- 3 R,T' R/So.-/ XT 1/1/ NOTES ISSUED BY CifMHILL MEETING NOTES 7 REGION DATE 3r ZO -S imam SUBJECT: y G(/ C G�/ IJT� - O/ DATE!NG✓ - ZD'87 LOCATION TD,'. Af.,ST/K , /f:00M 2/5- ATTDS S: SeENe �164ect. NOTES BY: . REGION TOPICS DISCUSSED ACTION/NOTES Hive reeeivel /fermi, /`0�01ofri . //die ripe/ w/ /ZS • p el 4al‘f.dicael Gt>G)TP e/rya. Tide wow hde C mom:%oi:i g .44 /' 7,441 � fob. EYen p /, 0off,t1 - need n i`/eri:, s ip s � &' / d - 7V „foe Icj �v exst. a,n1` on-/ne as /07 Qspss/6/c &s on /. 7 7n 75-= z ZS TwC S s 74, pare g t Z. Z� -/ ,�. gew_ /4 . /(.s'� nee G5 O early . . 6 AO"- L041 s / rem& terr-/i f �/// C 516 s /2o 7 REV 1/83 FORM 228 PROJECT NUMBER SHEET -2 OF .,7 - NOTES ISSUED BY Ciaftlia MEETING NOTES REGION DATE SUBJECT: MEETING DATE: LOCATION ATTENDEES: NOTES BY: REGION • TOPICS DISCUSSED ACTION/NOTES TGt1e W/%/ retlee") agtetrin £eat/e eke /n Ao AY_, A TAG — r9 -// 4/. 4p / v72h" "405 9- s, e. /8/d) AlAla,/a. 6OrlS�ifeh n (ledigf r a5i& d ETA- Ski es • %ye eis/G�'e jeer," /WI a- /i/ ,Or/or/ . ladeS, 3- - .]30‘ n — 3 REV 1/83 FORM 228 i,.,... ..,,.... tidal • CONFERENCE ATTENDANCE RECORD ENTITY (in) 017 Wth (F mot 21 DATE 4,c{r,V_tc ZU, 1467 -I 2C9p1/,1 NAME ORGANIZATION • �2w • c ( t Q tL' 117 4(nz - 74A /alt.:e llik.u_4(.4 - Kx r - ,n1 W YL lam' G%Ty- CovAcL ,806 /lforri. ait, Gh'2/J1 f /G Z. --. w• SA-xi -r-R,,- ,th . C, , cbYam, bus 1,1• P61-P,./9S c j ry cr cc1 /,'12, 7,7M DA-5c14 -. TrvC 1-er-a it vE,cJ�e 7-we- PEaxfArs T tiv 37 Aic ZA reams 9,&9r oF H At r/l JE�e2� SqL.,6.40o /i ii if ,, • Za,p/ ��v j/e. p ,r;c/1 }� . m egrs 7-14C, - cam. ( o1RC 6ss-(// 7--wc - 61/ March , 1987 Ms . Jennifer A. Sidnell Wastewater Enforcement Section Water Quality Division !}fr;lia Texas Water Commission i+i` ,g' I�•4 S. �G P.O. Box 13087 , Capitol Station # ':ii4E=''E44.. EE4%, h 4., 1h; Austin, TX 78711-3087 .;E .;i.ii:'r Dear Ms. Sidnell : 'i: Subject: Wylie Wastew tee`ii!reatnent Plant (WWTP) Schedule :E: The purpose of -pli,;s letter:;; is to respond to your request for ... . . .. a schedule by Al1'4, 4 , 11987 regarding the construction of a new WWTP for the Otiyi.oif Wylie. We understand that this schedule will become a part of our renewed permit for the existing WWTP, which will be issued in the near future . At our meeting in Austin on March 20 , 1987 , you indicated that the new WWTP must be on-line by February 1 , 1989 . This is less than 2 years from now, which presents an extremely tight schedule with no room for delays . This will also probably result in higher engineering and construction costs DFW16/106 /6 Ms . Jennifer A. Sidnell Page 2 March , 1987 for a "fast track" approach. However, we will use this date as our "beginning" date and make every effort possible to meet this goal. With the February 1 , 1989 date in mind, we propose the following schedule for the new Wry: .:Y •£+t:i Project Milestone , ,: ?„rdposed Date m. 1 . Begin preliminarydesign ''`''g g ,. '`.,d• i t f, 1987 2 . Begin final design '`j: May 15 , 1987 3 . Apply for discharge permit:;, "; j:; June 1 , 1987 4 . Submit plans and specifica- ` tions to the TDH for apprj va 2= ;::j'::,,, September 9 , 1987 5 . Advertise for construction'::; kids.;;: •:,;...::'1 September 16 , 1987 6 . Construction noticezto°^proceed November 2 , 1987 7 . Operational comp1et i.oncif t1 e new WWTP j,. €, j: February 1 , 1989 At this time, we cannQt''jjprovide"`•detailed information on the hb proposed new p1a jt. Av `indicated above, we will begin a process study and 'p elm: nary design for the new plant by April 1 . Our proce's,p,''study will select appropriate processes for the new plant, decide on the capacity of the first stage of this plant, and present design criteria for the first stage facilities for your review. However, we can provide the following information for you at this time: DFW16/106 // Ms . Jennifer A. Sidnell Page 3 March , 1987 1 . The new plant will have a design capacity (peak month average) of at least 2 . 5 mgd. 2 . The new plant will be located at the lant3 i11 site across the road from the existing site.. 'i;;,,This location is identified in Figures 4 . 1 and .;;4` i2'j of 'a14:;Preliminary Engineering Study submitted to' the ;;TWC in October 1986 . •``pit: •''ii: 3 . Regardless of process sel=' ct` on ``°ar dize, the new plant will be designed to.::lieet the'effluent limitations summarized in thv• ¶LWC ';s '`1`6tt x" to the City dated October 27 , 1098i64 o BOD I3'0-day ;;average) 10 mg/L o TSS (10.-ttay'average) 15 mg/L o NH3-N 13,44day average) 3 mg/L o Minimum DO 4 mg/L o Minimum Chlorine Residual 1 mg/L 4 . The new plant will be designed to meet the requirements of the TWC ' s "Design Criteria for Sewerage Systems . " 5 . Provisions will be made in the plant design to allow for the relatively easy addition of facilities that may DFW16/106 Ms . Jennifer A. Sidnell Page 4 March , 1987 be required to meet more stringent effluent limitations in the future. Thank you for your time and consideration on ;>tiis matter . +; Please call me at 214/442-3564 if you hav,eg' .arir questions or pii•. 4 need any more information. ' 1 ::+�`• tai'r lii + :i 1.. .::• ro Sincerely, k. ail; ::. .::• I .W. Santry, Jr City Engineer • jkb/DFW16/106 cc : Mr. Thomas G. Mason Director--Water Quality Division Texas Water Commission P.O. Box 13087, Capitol Station Austin, TX 78711 Mr . Rex D. McDonnell , Jr . Chief, Wastewater Enforcement Section DFW16/106 ,,5 Ms . Jennifer A. Sidnell Page 5 March , 1987 Water Quality Division Texas Water Commission P .O. Box 13087 , Capitol Station Austin, TX 78711 ;j+ijj'I / ,iil�• iiilj 't'i I71fi i j' ii Mr. Edward C. Juenger iiliii'rl`ill li4 !1{';ifi. tti ; li. !i• l Staff Engineer, Wastewatgr 'ezin�'!ts Section Texas Water Commissia P.O. Box 13087 , Capic :"°'i&;tat:j,o ii Austin, TX 78 71'1�`ii ` i:. i:. flit:. iir ;i' •i ii;::i` Mr. Ramq r,,: D sd4. :,i. N. Legal section `jj: Texas ``Water .,Commission P.O. Box ii :;40'87, Capitol Station Austin, TX 78711 Mr . Charles D . Gill District Manager, District 4 Texas Water Commission 203 James Collins Blvd. Duncanville , TX 75116 DFW16/106 / / Ms . Jennifer A. Sidnell Page 6 March , 1987 Mr. Don Thurman • Director, Water Hygiene Texas Department of Health 1100 W. 49th Street +ni,th .:rf''•1• i t'ih it Austin, TX 78756 t1; tjkikl 1`lf. .:1Eii...:i�1•f k ' Mr. Myron Knudson ,i'' :1+�' :iE;iii:. ilk AL. 'i•.'il•,•.• .�• Director of Water Mania9ement I14:vision .. is Environmental Protectip'i��4.ge;A}c ;: 1201 Elm Street-... '°°�ii;;, •:: ;;:• Dallas, TX ;• Wylie''i.City coUnc '1°" • Mr. Gus P4pr3as City Manager Mr. W.W. Windham Director of Public Works Mr. Robert Morrison CH2M HILL 5339 Alpha Road, Suite 300 Dallas, TX 75240 DFW16/106 �� • r Engineers 111111111 Planners gfMHILL Economists 11111111/ Scientists March 24, 1987 TX356 .73 • Mr. I .W. Santry, Jr. , P.E. City Engineer City of Wylie P.O. Box 428 Wylie, Texas 75098 Dear Mr . Santry: Our meeting last week with the TWC has significantly changed the "plan of action" that we have been proceeding on with the City for your wastewater treatment plant (WWTP) facilities. In essence, the TWC stipulated the following conditions : 1 . The City' s existing discharge permit will be renewed at a monthly average flow of 0 . 8 mgd. The maximum effluent BOD and TSS will be set at 150 lb/day. There will be no requirement established for ammonia removal. 2 . This will be a temporary permit pertaining only to the • existing plant. The TWC expects the City to spend as little money as possible on the existing plant and put a major effort into a new plant. 3 . The renewed permit will be issued with a strict time schedule by which the new WWTP must be on line . The TWC has stated that the new plant must be operational by February 1 , 1989 . 4 . The TWC has stated that the design (peak month average) capacity of the new plant must be at least 2 . 25 mgd. The TWC ' s stipulations bring forth two major considerations for the City. First, we still consider that some improvements to the existing plant are necessary to help meet the effluent requirements of the renewed permit. We recommend that the influent pump station and aeration improvements (to be designed under our Task Order No. 3) be constructed as planned, with the exception that the size of these facilities may be some- what smaller than anticipated earlier . The secondary clari- fier addition and improvements should be delayed or even eliminated, with the understanding that the effluent /t CH2M HILL Dallas/Fort Worth Office 5339 Alpha Rood. Suite 300. Dallas. Texas 75240 214.980.2170 Metro:263.9476 Mr. I .W. Santry, Jr. , P.E. • Page 2 March 24 , 1987 TX356 . 73 requirements stipulated by the TWC will be very difficult to achieve even with polymer addition. The second major consideration for the City is schedule . As you are aware, the schedule proposed by the TWC is extremely tight. Assuming a construction period of 15 months (which is the minimum we would recommend for a new facility in the 2 . 5 to 4 mgd size range) and an advertisement, bid, and award period of 1 } months , only about 6 months remain for the new plant predesign and design effort. As a result, it is impera- tive that design of the new WWTP begin as quickly as possible. Based on these considerations, we recommend the following: 1 . The scope defined in Task Order No. 3 should be modified to include design of the existing WWTP short-term improve- ments (influent pumping and aeration only) and a fast- track predesign of the new WWTP. We believe that the budget of $62 , 900 established in Task Order No. 3 should be adequate to perform these services . The advantage of modifying the task order already authorized by the City is that the proposed work is within the Council ' s intent regarding timely resolution of the WWTP problems and work on the predesign activity could begin immedi- ately. We strongly feel that this will be necessary if the schedule stipulated by the TWC is to be met. 2 . In early April , a scope and fee for Task Order No. 4 pertaining to the final detailed design services for the new WWTP should be drafted, negotiated and approved by the Council. We anticipate an advertisement date of September 15 , 1987 which allows only about 6 months for this design and review period. The basic scope of services that we propose to furnish for the modified Task Order No. 3 are summarized in the attached "Amendment to Task Order No. 3 Scope of Services . " As compen- sation for providing these services, we propose that the estimated budget for Task Order No. 3 remain at $62, 900 . This compensation will still be paid on a monthly billing basis at a rate of the personnel ' s salary cost times a multi- plier of 2 . 25 , with reimbursement of all direct expenses at actual cost times 1 . 10 . The work will be done on a time and materials basis so that the City will only pay for actual hours expended and costs incurred on the project. The total /7 Mr. I .W. Santry, Jr. , P.E. Page 3 • March 24 , 1987 TX356 .73 cost shall not exceed $62 , 900 without the written approval • of the City.. If this task order amendment meets with your approval, please sign the enclosed copies and return two copies to this office. Please call if you have any questions. Sincerely, • )141..c)-0,N: . Gordon F. Koblitz , P.E. Dallas Office Manager Accepted by City of Wylie By: Title: Date: Enclosure DFW308/077 /1 AMENDMENT TO TASK ORDER NO. 3 SCOPE OF SERVICES The basic scope of services will include the following tasks to be performed by the ENGINEER: A. EXISTING PLANT, SHORT-TERM IMPROVEMENTS DESIGN SERVICES 1 . Final Design Project Management, Project Coordina • - tion, and Project Review and Quality Control a. The ENGINEER will conduct meetings to provide guidance and coordination with the ENGINEER' s assigned Project Staff. b. The ENGINEER will manage the Project' s budget and monitor its percent complete status by preparing monthly Project status analyses and formally submitting invoices to the OWNER on a monthly basis . c . The Project' s quality will be monitored through the use of OWNER and ENGINEER reviews as described below: o OWNER' s informal review will be conducted through the use of one meeting between the ENGINEER and designated representa- tives of the OWNER at approximately the 50-percent complete stage. o The ENGINEER will provide in-house re- view of the final design status and Con- tract Documents at the 80-percent comple- tion level by technically competent senior Project personnel. o Concurrent with the ENGINEER' s 80-percent, in-house review of the Contract Documents , the ENGINEER will conduct an 80-percent review meeting with the OWNER. o Additional meetings with the OWNER will be conducted if requested by the OWNER under the provisions of an increased scope amendment to this Task Order Amendment. 2 . Final Design Process Components The following specific facilities identified in the Preliminary Engineering Study are to be designed 1 /9 by the ENGINEER for installation in one contract at the existing wastewater treatment plant site: a. The replacement of two influent pumps and associated suction and discharge piping with new pumps and piping at the influent pump station. Associated electrical equipment and wiring modifications will also be included. b. The addition of four new floating aspirator aerators at the oxidation ditch with associated electrical equipment and wiring. Final detailed design work will include structural, mechanical , and electrical drawings . Specifications will be prepared for the installation of the facili- ties listed above, including sections for bidding requirements , contract forms, conditions of the contract, general requirements, site work, concrete, metals, equipment, special construction, mechanical, and electrical. 3 . Preliminary Document Printing, Construction Cost Opinion, and Miscellaneous Tasks a. The ENGINEER will provide two sets of pre- liminary Contract Documents at the 80-percent design completion stage to the OWNER. b. Upon receipt of the OWNER and ENGINEER review comments , the ENGINEER will modify the Con- tract Documents as required and submit five sets of Contract Documents to the OWNER for distribution to governmental agencies having jurisdiction for their review. c. The ENGINEER will prepare an opinion of the construction cost of the Project. The ENGI- NEER' s opinion of cost will be prepared after completion of the final plans and specifica- tions and prior to the Project' s advertisement for bids . Should the results of the ENGINEER' s cost opinion affect the OWNER' s apparent ability to finance the project, the ENGINEER will modify the Contract Documents which were the basis of the construction cost opinion if specifically asked to do so, but only under the provisions of an increased scope amendment to this Task Order Amendment. d. Upon receipt of approval of OWNER and appro- priate reviewing agencies of the draft plans 2 �� and specifications (within 60 days from date such draft plans and specifications were sub- mitted) , the ENGINEER will provide 5 copies of the Contract Documents to the OWNER. In addition, 50 copies of the Contract Documents will be printed for obtaining bids for con- struction. These documents will consist of bound reproductions of computer-printed spec- • ifications and half-size reproductions of the original mylar and ink drawings. B. NEW PLANT, PRELIMINARY ENGINEERING DESIGN SERVICES 1 . Selection of Basic Treatment Processes Using the ultimate influent wastewater flows and loads developed in the Preliminary Engineering Study, the ENGINEER will develop a proposed plan for the basic wastewater treatment processes listed below for use in the new wastewater treatment plant • located at the landfill site. a. Preliminary Treatment Processes o Influent Pumping o Equalization o Screening o Grit Removal o Influent Flow Measurement o Odor Control b. Primary Treatment Processes o Primary Clarification c. Secondary Treatment Processes o Activated Sludge System o Aeration System o Secondary Clarification d. Post Treatment Processes o Filtration o Effluent Flow Measurement o Chlorination o Post Aeration e. Solids Handling Processes o Primary Sludge Thickening o Secondary Sludge Thickening 3 0�/ o Aerobic/Anaerobic Digestion. o Dewattering/Disposal Feasible alternatives for the processes listed above will be screened through a consideration of relative advantages and disadvantages in terms of process reliability, ease of operation, and energy and resource requirements. Where necessary to decide between alternatives , cost curve level capital and annual operation and maintenance costs will be compared. On the basis of this process evaluation, a summary of the size requirements for the selected ultimate plant unit processes will be developed. A draft technical memorandum containing the results of the treatment process selection and sizing evaluation will be prepared and five copies submitted to the OWNER for review. 2 . Staging Analysis a. A staging analysis will be performed to deter- mine the design capacity of the first stage of the treatment plant. The stagirrg analysis will be based on low and high population esti- mates summarized in the Preliminary Engineering Study and input from the OWNER' s staff. b. Influent wastewater design criteria for the first stage plant will be summarized. c . A draft technical memorandum containing the results of the staging analysis will be pre- pared and five copies submitted to the OWNER for review. 3 . Preliminary Design of First Stage Plant A preliminary design of the first stage plant will be developed. The preliminary design will consist of the following components : a. An analysis will be performed to investigate methods to delay construction of specific unit processes or structures until subsequent stages of the plant are necessary. Sand drying beds will be included in the evaluation as an initial dewatering method as a means to delay construction of the dewatering system (s) selected for the ultimate plant. 4 c=.? b. Process sizing and design criteria for the selected first stage processes will be final- ized and summarized. A more complete des- cription of the first stage plant will be made. c. A preliminary site plan showing the general location and arrangement of the first stage and ultimate facilities will be prepared. Space will be provided for the following future advanced treatment processes that might be required: denitrification for nitrogen removal, phosphorus removal, and dechlorination. d. A preliminary hydraulic profile of the plant will be established to set tentative structure elevations. e. General materials of construction will be defined in consideration of corrosion poten- tial, ease and time of construction, archi- tectural style, length of useful service, and costs. An evaluation will be made comparing • the use of glass fused steel tanks with con- crete tanks and metal buildings with concrete block buildings . f. An estimate of the capital cost of the first stage facilities will be prepared. The opinion of cost will be of budget level accuracy devel- oped with the use of cost curves, manufacturer' s estimates, and similar construction of other wastewater facilities. g. The results of the first stage facilities preliminary design will be summarized in a draft technical memorandum and five copies will be submitted to the OWNER for review. 4 . Preparation of Preliminary Design Report a. A preliminary design report summarizing the results of the investigation itemized in Sections B-1 , B-2, and B-3 of this Task Order Amendment will be prepared and submitted to the OWNER. Thirty (30) copies of the report will be provided. C. SERVICES SPECIFICALLY NOT INCLUDED This item and Task Order Amendment specifically excludes the following from this Scope of Services: 5 a 1 . Engineering services during construction of the short-term improvements to the existing wastewater treatment plant listed under Section A of this Task Order Amendment. 2 . Engineering services related to the final detailed design and geotechnical investigation for the first stage facilities of the new plant. 3 . Engineering services related to the method of financing and the work required to secure finances for the existing plant and new plant construction. 4 . Engineering services related to the boundary survey and topographic elevation survey of the existing wastewater treatment plant site and the 40-acre landfill site identified as the new wastewater treatment plant site in the Preliminary Engineering Study. Base maps necessary to prepare satisfactory plans and specifications will be provided' by others for these sites. 5 . Surveying services necessary to locate geotechnical investigation borings at the 40-acre landfill site. DFW306/003 6 4'7,)