C153953 Contract

• Contract/PO #: C153953
• Contractor Name: Camp Dresser & McKee
• Contract Type: Grant
• Water District: 0
• Loan Projects - Doc Type: Contract Documents

Task 50 Development of a Data Centered A roach
Task 51 Phase 2 Management
A significant amount of work has been completed by previous investigators related to ground
water conditions in the study area, as summarized in the SPDSS Feasibility Study and in
Groundwater Phase 1 deliverables. The Phase 2 field data collection program (Tasks 33, 35, 36
and 37) is a continuation of the Phase 1 field data collection effort (see Phase 1 Tasks 33, 35 and
36) to fill data gaps identified after historical data were collected and analyzed (see Phase 1 Tasks
31, 32, 38, 42, 43 and 44). Data obtained from the Phase 2 field data collection program will be
analyzed and added to the existing groundwater databases and maps (Tasks 42, 43, and 44). The
databases and maps are expected to be used in future years to update the existing groundwater
model of the Denver Basin Region (Task 47), and to support and expand modeling of the Lower
South Platte Region (Task 48).
All deliverables will be consistent with the DSS design, including use of data structures and
formats that are being developed by the Database DSS contractor. Deliverables will use DSS
standards for memo formats, report formats, database design and program documentation, etc.
Task 33: Field Study Workplan Development
Objective:
The objective of this task is to develop a Phase 2 field program and workplan. This field
program will fill some of the data gaps identified under Phase 1 Tasks 42, 43 and 44. This
workplan will guide the drilling and construction of observation wells, and conducting of aquifer
pumping tests in the Denver Basin and Lower South Platte Regions.
Approach:
Task 33.1 Phase 2 Data Collection Program Design.
The Consultant will develop a Phase 2 data collection program based on Phase 1 outcomes.
This will include drilling, installation and testing of up to 25 new alluvial aquifer observation
wells and 1 new bedrock aquifer observation well; collecting water levels from existing wells;
and conducting aquifer pumping tests. If existing wells are available and fill in data gaps, they
may be used instead of installing and testing new wells and the number of new Phase 2 wells
may be reduced.
• For new wells, the field procedures that were developed under Phase 1(for site access, control
and reclamation, well drilling, sampling and well construction, borehole and core sample
testing; water level measurements, health and safety, field QA/QC protocols, and field
documentation requirements) will be used. Additional procedures will be added to the
workplan to address conditions or data collection activities that are new for Phase 2.
• Maps of the Denver Basin and Lower South Platte Regions developed in Phase 1 will be used
to depict areas considered by the Consultant to be high priorities for collection of new
hydrogeologic data, based on data collected during Phase 1 and based on data gaps identified
SPDSS Groundwater SOW, Phase 2 2