HomeMy WebLinkAboutCORRESPONDENCE - PURCHASE ORDER - 9190954 (4)Change Order Form (for Work Orders)
Official Purchasing Form
Last updated 10/2017
CHANGE ORDER
NO. 001
PROJECT TITLE: Larimer County Remedial Analysis
CONTRACTOR: 8631- General Environmental Services- AECOM
WORK ORDER NUMBER:2019-05.16.2019
PO NUMBER: 9190954
DESCRIPTION:
1. Reason for Change: Unanticipated data processing and QC added to original scope, as well as
the addition of two tasks
2. Description of Change:
AECOM’s initial two tasks:
Task 1: Hydrogeological Evaluation
Task 2: Assessment of Corrective Measures (ACM Report)
These two tasks are essentially completed, and the final deliverables/reports are in final DRAFT
form. These took more effort than initially anticipated because of additional data and more than
anticipated QA/QC.
Details of unanticipated work (Task 3) include:
Required a software engineer load the data into a database to be able to query data tables.
The data was sent to AECOM in a cross-tab version that takes a little more time and QC for
proper upload into a database.
Performed a 10% check of the entire data dump received from Larimer County and also
scrubbed the data of duplicates. (More than 18,000 duplicates)
Performed QC of the historic boring logs, checking the lithologic interpretations across the
site (since they were very old they the descriptions varied for the lithologic interpretation) and
made interpretation of the data and created the cross-sections.
After cross sections, AECOM had a second geologist do a back-check of the input data to
verify our lithologic interpretation. The cross-sections generated were not previously available
in any of the reports received.
Performed a QC of the potentiometric surface interpretation and then created map using the
data available.
Utilized the data queried by AECOM software engineers to create the time series graphs to
check trends and the interpretation of COCs.
AECOM requested data tables from Larimer County for the data collected in 2018/2019 for
the 1,4-dioxane. County did not send and instead requested that AECOM use the PDF tables
in the appendix. Result was that AECOM had to manually enter data and perform QA/QC.
AECOM received data in multiple batches, which also added to effort at our end.
AECOM is requesting an additional $5,000 from the City of Fort Collins to cover the added costs of
Task 3.
Additional tasks being requested:
DocuSign Envelope ID: 0186AD64-32DC-4D4F-B40E-C467417B952B
Change Order Form (for Work Orders)
Official Purchasing Form
Last updated 10/2017
Task 4: Attend 4 meetings. Assuming 2 hours meeting each time with two AECOM staff (the PM
and the technical/data expert) will attend meetings leading up to the end of November submittal of
the final report to CDPHE. Also included is time for follow-up discussions with City staff after said
meetings.
Estimated total $5,700
Task 5: Reviewing 3 reports and boring logs and preparing a letter addendum to the ACM and
Hydrogeological reports. AECOM assumes needing input from three different technical experts to
prepare this letter and we took that into consideration for this estimate.
Estimated total $9,000
3. Change in Work Order Price: $20,000
4. Completion Date (if changed): Month Day, Year
ORIGINAL WORK ORDER PRICE $ 35,000.00
TOTAL APPROVED CHANGE ORDER $ 20,000.00
TOTAL PENDING CHANGE ORDER $ 20,000.00
TOTAL THIS CHANGE ORDER $ 20,000.00
TOTAL % OF THIS CHANGE ORDER 36% increase
TOTAL C.O.% OF ORIGINAL WORK ORDER 36%
ADJUSTED WORK ORDER COST $ 55,000.00
CONTRACTOR: AECOM
By: Date:
Name: Margaret Zebley Title: Remediation Department Manager
ACCEPTANCE: Date:
Matt Zoccali, Project Manager
REVIEWED: Date:
Pat Johnson, Senior Buyer
ACCEPTANCE: Date:
Lawrence Pollack, Budget Director
ACCEPTANCE: Date:
Gerry Paul, Purchasing Director
(if greater than $60,000)
DocuSign Envelope ID: 0186AD64-32DC-4D4F-B40E-C467417B952B
11/14/2019
10/23/2019
10/23/2019
10/23/2019