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Home My WebLink About4.07 DSRSD Sewer System Master Plan Update CITY OF DUBLIN AGENDA STATEMENT CITY COUNCIL MEETING DATE: March 23, 1987 SUBJECT Status Report - DSRSD Sewer System Master Plan Update EXHIBITS ATTACHED February 19, 1987, Letter from David P. Beemen, CH2M Hill RECOMMENDATION J(ZOV Receive status report. FINANCIAL STATEMENT Cost not to exceed $17,180.00 to be paid directly to DSRSD by Ted Fairfield. DESCRIPTION In May, 1986, at the request of Ted Fairfield, the City Council requested the Dublin San Ramon Services District (DSRSD) to update the DSRSD Sewer System Master Plan. The update would consider a revised density for unincorporated lands east of the City and areas in Contra- Costa County that might be in the sewer service area. The cost for the study in those areas east of the City were to be paid for by Mr. Fairfield. Since that time, Staff has been in contact with DSRSD, Alameda County, Contra Costa County, and City of San Ramon staffs, CH2M Hill, Consultants to DSRSD, and Mr. Fairfield. A proposal has been prepared and agreed upon for updating the DSRSD Sewer System Master Plan for the unincorporated lands east of the City. The cost of this update is not to exceed $17,180.00, and Mr. Fairfield is to pay the cost directly to DSRSD. Mr. Fairfield will explore with DSRSD the potential for pro-rata reimbursement. The Consultant estimates that the update will take two to three months, depending on the availability of revised density information. ------------------------------------------------------------------------------ COPIES TO: Planning Department Ted Fairfield Robert Whitley Harry Hecht Jim Cutler ITEM N0. +b Marc Goto n • RECEIVED ® Engineers - Planners FEB 2 7 1'987 ;-_� ;'� c �,_: , , :;,• Economists DUBLIN PLANNING Scientists _ February . 19 , 1987 7 F272. 72 rRaM Dublin San Ramon Services District 7051 Dublin Boulevard Dublin, California 94568 Attention: Mr. Robert Whitley Subject: Sewer System Master Plan In response to our recent telephone conversation, we are submitting a revised cost estimate to the October 31 , 1986 letter proposal for preparation of an update to our master plan of the Dublin San Ramon Services District' s sewer sys- tem. The proposal identified five tasks to evaluate the impact of increased development densities in eastern Dublin. The analysis required for CH2M HILL to evaluate the eastern Dublin Sphere of Influence is estimated to cost not to ex- ceed $17 , 180 . As compared to the $16,500 identified in the October 31 , 1986 letter proposal, this represents a 4 per- cent increase in labor cost. Table 1 provides labor and expenses breakdown by task. As indicated previously, this evaluation could be completed in approximately 8 to 10 weeks depending on the availability of revised density information from Dublin and Alameda County. We will provide these services on a time and mate- rials basis in accordance with Amendment No. 2, including a 4 percent increase in the per diem rates. If you have any questions regarding the above tasks or the cost estimate, please contact me. Sin c y, David P . Beemer Project Manager Enclosure SFC8/011 c '9 C C ' CH2M FOC arm. L L 2200 Powell Stresf,8th Floor,6 San Francisco Regional Office i Table 1 Dublin San Ramon Services District COST ESTIMATE FOR MASTER PLAN REVISIONS Estimated Cost Task Description Labor Expenses Total 1 Meet with Dublin/Alameda County $ 1,310 $ 50 $ 1,360 2 Revise Land Use Calculations 3,920 100 4,020 3 Run SAM Existing and Future 2,640 450 3,090 4 Analyze SAM .Results 2,970 100 3,070 5 Prepare Addendum to Report 5,240 400 5,640 Total $16,080 $1,100 $17,180 SFC8/013 t October 31 , 1986 F272.72 Dublin San Ramon Services District 7051 Dublin Boulevard Dublin, California 94568 Attention: Mr. Robert Whitley 'r Subject: Sewer System Master Plan We are pleased to present this letter proposal to*'update our master plan of the Dublin San Ramon Services District's sewer system. The proposed and existing sewer system capacity to serve the eastern portion of the District within the City of V" G Dublin' s sphere of influence was developed for analysis withintSbo �`� ..the Sewer System Master Plan for Alamo Creek and East Dublin.' 5� c Since the master plan was submitted in November 1985, the o� development density in east Dublin has increased beyond the projected limits. At your request, we have prepared -this proposal to update our wastewater flow calculations and re- vise the capacity evaluation of the sewer system. Additional analysis required for CH2M HILL to evaluate the impact of increased development density within Dublin' s eastern Sphere of Influence is estimated to cost not to ex- ceed $16,500. This analysis would consist of the following five tasks: Task I. Meet with Dublin and Alameda County Staff The first task would be to meet with the appropriate City of Dublin and Alameda County staff to collect and understand the degree of change in development densities which have occurred in east Dublin since the completion of our Interim Master Plan Report. A maximum of four meetings is estimated. Task 2. Revise Land Use Calculations Based on the results of the meetings in Task 1 , Chapter 4 , Growth Analysis, and Chapter 5 , Design Flow Analysis, in the %.,,t .•. � .'� c L. r c Nom-." �sae.l�in�.. ....°.,.A_..{S-x-�� r ��..�'�.,.,. y .-�'.!�_.�Le'..aim�....�:y.�'.a.�..:�,,.�:�.....,. .,. . r Dublin San Ramon Services District Page 2 October '31 , 1986 F272.72 interim report would be revised including the tables, fig- ures, and design wastewater flow calculations. Task 3. Run System Analysis Model Revised design flow data for the eastern Dublin area would be input to the System Analysis Model (SAM) to determine required trunk sewer capacity from the development to the Wastewater Treatment Plant. A maximum of three SAM runs is estimated as follows: o Existing (1986) peak wet weather flow o Future peak dry weather flow o Future peak wet weather flow Task 4. Analyze SAM Results Each of the SAM printouts from Task 3 would be analyzed to determine required new pipeline diameters and possible im- provements to existing pipelines. The tables and figures presented in Chapter 7, Sewer Collection Analysis, and Chap- ter 8 , Recommended Plan would be revised as necessary. Task 5. Prepare Letter Addendum to Master Plan Report Based on the results of Task 1 though 4, a letter addendum would be prepared to -summarize the findings of the capacity analysis. The addendum would serve as a draft document for review by the District, City of Dublin, and Alameda County. The results would be incorporated into the final master plan report including the Western Area of the District which is covered by our. Amendment No. 2. This evaluation could be completed in approximately 8 .to 10 weeks depending on the availability of revised density information from Dublin and Alameda County. We will provide these services on a time and materials basis in accordance with the Amendment No. 2. If you have any questions regard- ing the above tasks or the cost estimate, please contact me. Sincerely, David P. Beemer Project Manager SFC8/046