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HomeMy WebLinkAboutAgreements/Contracts - Public WorksK21-010 January 10, 2021 Change Order 14 TO CONTRACT BETWEEN Grant County 124 Enterprise Street SE Ephrata, WA 98823 and Pacific Groundwater Group, Inc. 2377 Eastlake Ave E. Suite 200 Seattle, WA 98102 PROJECT: Ephrata Landfill Remedial Investigation (RI), Feasibility Study (FS), and Clean Up Acton Plan (CAP) — North End Water Level Study This signature page, attached work scope (Exhibit A), work budget (Exhibit B), and historic project budget table (Exhibit C) constitute Change Order 14 to the contract dated August 6, 2007 between the Grant County and Pacific Groundwater Group (PGG). Change Order 14 covers costs for an expanded North End Water Level Study at the Ephrata Landfill. The expanded study includes instrumenting 25 targeted north end wells with pressure transducer dataloggers to continuously monitor water levels during the 2021 year. The number of wells on the north end recently doubled with the installation of 76 new monitoring wells during the Phase I North End Supplemental Investigation. The transducer data, together with manual water level measurements of north end wells, will be used to improve our understanding of groundwater flow and hydraulic interconnection within the contaminated basalt water bearings zones on the north end of the Ephrata Landfill. This change order covers costs for the expanded the water level study as summarized in Exhibit A. The additional budget under Change Order 14 is $55,464 which brings the total authorization under the original 2007 contract to $3,834,103 (Exhibit Q. The Terms and Conditions set forth in the original contract dated August 6, 2007 govern work under this change order unless amended herein. Under the original 2007 contract, PGG's billing rates may be increased by 5% every other year. The next increase is scheduled for June 2021 and are included in this budget. Note that PGG's rates for this project are still lower than our standard rates on other projects. Budgets under this amendment are in addition to budgets established in the original contract and Amendments/Change Orders 1 through 13. If you agree to the scope of work and budget; and acknowledge that the terms and conditions of the original contract apply to this amendment, please sign both copies of this amendment and return one signed copy to us. Ephrata Landfill RDFS Change Order 14 Page 1 of 2 JE0714 January 10, 2021 For Grant County: Date ' �t attachments: Exhibit A Work Scope Exhibit B Change Order 14 Budget Exhibit C Historic Project Budget Table Ephrata Landfill RI/FS Change Order 14 Page 2 of 2 JE0714 January 10, 2021 For Pacific Groundwater Group: Date 1/10/2021 Stephen Swope Principal CHANGE ORDER 14 EXHIBIT A - SCOPE OF WORK Ephrata Landfill Remedial Investigation, Feasibility Study, and Cleanup Action Plan Scope: North End Water Level Study January 10, 2021 Summary Change Order 14 covers PGG's costs to perform the North End Water Level Study at the Ephrata Landfill. Work under this change order is an expansion of the water level monitoring under our current Amendment 13 contract (Task 7). Task 7 includes four quarters of site -wide manual groundwater level measurements after completion of the new Phase 1 wells. This expanded work includes instrumenting 25 targeted wells on the north end with pressure transducer dataloggers to continuously monitor water levels during the 2021 year. Continuous water level monitoring with dataloggers will improve our understanding of groundwater flow and hydraulic interconnections between the different contaminated water bearing zones at the north end of the landfill. This in turn, will enhance our understanding of contaminant plume transport and the effectiveness of potential extraction measures that may be evaluated in the Feasibility Study. The transducers purchased for this study will also be of use for data collection during future pilot testing at the site. Change Order 14 is broken into three tasks: • Task 1 Transducer Deployment • Task 2 Three Download and Measurement Events • Task 3 Data Processing and Management • Task 4 Reporting Each task is described below. Task 1 Transducer Deployment PGG will purchase 25 Solinst Levelogger® transducers with a 0.01 to 0.015 ft range plus a Barologger for correcting for barometric pressure. PGG will program transducers prior to deployment and set up a project specific water level monitoring database. PGG has an in- house water level database template available for the Ephrata study that we use on other projects that is set up to efficiently process and manage large transducer datasets. PGG will deploy the transducers into the 25 target wells and collect manual site -wide water level measurements from all north end wells. We estimate a two-day effort with 2 PGG staff to deploy the transducers and collect manual water level measurements from the north end wells. Ephrata Landfill RDFS Exhibit A Page 1 P g G Change Order 14 JE0714 January 10, 2021 Task 2 Three Download and Water Level Measurement Events PGG will perform three field visits throughout the 2021 year (late spring, late summer, and late winter) to download the data from the transducers. PGG will also collect manual measurements from all north end wells during the download events. We estimate a two-day effort with 2 PGG staff to download dataloggers and collect manual water level measurements from the north end wells. Task 3 Data Processing and Management PGG will process water level data collected under the above tasks and import into the water level database. PGG will also develop hydrographs of water levels versus time for targeted wells and groundwater elevation maps depicting seasonal changes in groundwater flow directions. Task 4 Reporting PGG will summarize results of the water level study in a brief report which will include a summary of findings regarding hydraulic interconnection, gradients between water bearings zones, and implications for future extraction. Final plots and groundwater elevation maps will be included. The water level study report may become an appendix in the future Phase 2 report that will ultimately document findings from pilot testing activities currently being planned. Our budget includes a draft report to distribute to the City and County team for review and a final report addressing any comments on the draft report. Ephrata Landfill RI/FS Exhibit A Page 2 P g G Change Order 14 JE0714 January 10, 2021 EXHIBIT B. Pacific Groundwater Group - Change Order#14 Budget (North End Water Level Study) Change Order #14 to Original Contract dated August 6, 2007 January 10, 2020 Ephrata Landfill RI/FS Change Order 14 Exhibit B JE07141/10/2021 rgG ESTIMATED LABOR OTHER COSTS Total Total Support Technical Associate Principal Labor Direct Subcontract North End Water Level Study (2021) Subtask Task Task $73.50 $126.64 $161.82 $182.92 Cost Costs Cost Cost Cost 1 Transducer Deployment $25,363 la Purchase and Set Up Dataloggers 8 $1,294.56 Mileage $446.40 Transducers $14,872.00 $16,612.96 1 b Set up Water Level Database 4 $647.28 Per Diems $362.00 $1,009.28 1c Deploy Transducers and Site -Wide Water Level Measurements (2 staff) 23 23 $6,490.35 Misc. Equipt. $1,250.00 $7,740.35 2 Three Download / Water Level Measurement Events $16,818 2a Download Transducer and Site -Wide Water Level Measurements (2 staff) 56 56 $16,009.53 Mileage $446.40 $16,455.93 Per Diems $362.00 $362.00 3 Data Processing and Mangement $8,640 3a Process Data 40 $6,472.80 $6,472.80 3b Develop Maps/Hydrographs 12 4 $2,166.96 $2,166.96 4 Reporting $4,644 4a Draft Report 4 20 $3,742.96 $3,742.96 4b Final Report 2 4 $900.56 $900.56 TOTAL HOUR ESTIMATES 0 96 158 0 SUBTOTAL DOLLARS $0 $12,157 $25,568 $0 $2,866.80 $14,872.00 TOTAL AUTHORIZATION UNDER CHANGE ORDER #14 $55,464 Ephrata Landfill RI/FS Change Order 14 Exhibit B JE07141/10/2021 rgG EXHIBIT C. Ephrata Landfill RI/FS Interim Actions - Historic Project Budget Table Ephrata landfill RI/FS Change Orde 14 Exhibit C JE07141/10/2021 AUTHORIZATION ig CALL FOR BIDS Authorization given: January 19, 2021 to CALL FOR BIDS by the Department of Public Works for: 2021 Crushing and Stockpiling Bid opening date to be February 9, 2021 at 1:30 P.M. at the Grant County Public Works department,124 Enterprise St. S.E., Ephrata, WA 98823 Yea Nay Abstain d ❑ ❑ �❑ ❑ 7 ■I Approv Director of Public Works BOARD OF COUNTY COMMISSIONERS GRANT COUNTY, VI'iMHINGTON Cindy Cartek Chair &Xwl' t� Danny Ston , Vice - Chair Rob ones, Member BOARD OF COUNTY COMMISSIONERS Grant County, Washington RESOLUTION NOTICE OF HEARING RESOLUTION No. 21- i� O� -CC for VACATING a portion of surplus rights-of-way along Parcel 121306000 in Stratford Town Plat, Section 10 T22N R28EWM WHEREAS, Grant County, Washington, has received a petition to vacate portions of certain surplus rights-of-way described as follows: Legal description: Grant County Rights-of-way, Known as Stratford Town Plat surplus adjacent to Garrett, Parcel 121306000; an unbuilt right-of-way, ALL in Section 10 T22N R28EWM, all in Grant County, and as shown below with the Previous surplus vacated via AFN 1376867 petitioned by Henke; and As shown on attached Exhibit A WHEREAS, the Board of County Commissioners has determined that consideration should be given to vacating portions of certain County surplus rights-of-way and directs the County Road Engineer to prepare a report on the vacation and abandonment, and NOW, THEREFORE, BE IT HEREBY RESOLVED THAT the Grant County Board of Commissioners set a Public Hearing on the report and other related matters to be held via WebX Event address for https://grantcowa webex com/grantcowa/onstage/g.php?MTID=e26a6bcecf attendees: 6e880b2c5b10171ab426b0c Date and time: Tuesday, February 16, 2021 1:30 pm Pacific Standard Time (San Francisco, GMT -08:00) Duration: 30 minutes Description: Event number: 146 926 7733 Event password: GCPW2021 Video Address: 1469267733Ca)-grantcowa.webex.com You can also dial 173.243.2.68 and enter your meeting number. Audio conference: To receive a call back, provide your phone number when you join the event, or call the number below and enter the access code. United States Toll +1-408-418-9388 Show all global call-in numbers Access code: 146 926 7733 C:\Users\bvasquez\AppData\Local\Microsoft\Windows\1NetCache\Content.Outlook\MHC40Y9 6\F. Notice of Hearing surplus Parcel 121306000_.docx DATED this jo day of , 2021 BOARD OF COUNTY COMMISSIONERS Yea Nay Abstain GRANT COU WASHINGTON �j —� " Cindy Ca r, Chair L141ATTEST: Danny E. S one Vice -Chair i B a J. Vas C e of the B a El El �Jo , Member C/ C:\Users\bvasquez\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook\MHC40Y9 6\F. Notice of Hearing surplus Parcel 121306000_.docx Petition for Vacation parcel 121306000; EXHIBIT A: 171 141775000 Horn O 10 _ tO 21 ft. 121310000 Henke Trs 121309000 Henke Trs 17 ft 171240010 USA 12 ft. 1'112Q n CO —J gu�tn9tOn N ,�123���� C,cais►GO .�- ` 141774000 USA 141773000 USA 10 ft. 0 ' was 10 ft. 0 x- 121299000 i Eyler 121304000 Henke T 121300000 21305000 Henke Brow 12000 j-- " Henk 121300001 5 ft Sweet 121302000 mode 121301000 121306000 Christi Garrett 121301001 Brown � 12 �12ft. 20 ft. I2 20 ft. r 171240011 _.