1. Well 38 Drilling & Testing Amendment
Brian Powell
Director of Planning
November 25, 2015

2. Agenda Background Borehole A Discussion Planned Well 38 Relocation
Additional Project Costs
Recommended Action

3. Background

4. Background Located in San Jacinto on the Well 28 property
Well 28 is out of service due to a stuck pump requiring a new well on the site
Well 28 initially pumped at 2,600 gallons per minute (gpm), reduced to 1,500 gpm as it aged
Well 28 was originally installed in and failed in 2012
Due to the history of the site a new well was planned (Well 38)
The initial borehole for Well 38 was drilled to 1,520 feet below ground surface (ft bgs) and depth specific water samples taken

5. Borehole “A” Discussion

6. 50 feet below ground surface
Drilling Fluid and Cuttings Outflow
Drilling Fluid Inflow
50 feet below ground surface
Pressure from Drilling Fluids
Pressure from surrounding soils
Pressure from surrounding soils
Well 38
Not to Scale
Mechanics of
Borehole Drilling
920 feet below ground surface
963 feet below ground surface
1,520 feet below ground surface

7. 50 feet below ground surface
38”
32”
50 feet below ground surface
Pressure from surrounding soils
Well 38
Not to Scale
Borehole lost circulation
(Drilling fluids flowed out
Of the borehole at about
963 ft bgs)
17.5”
920 feet below ground surface
963 feet below ground surface (ft bgs)
1,520 feet below ground surface

8. Planned Well 38 Relocation

9. Planned Well 38 Relocation
New borehole (Borehole B) is required to finish the project.
Well 38 will be constructed at Borehole B.
Location to be on same parcel but as far from Borehole A as regulatory constraints allow (about 150 feet from Borehole B).
150 ft

10. Additional Project Costs

11. Additional Project Costs
Well 38 Proposed Costs November 9, 2014
Drilling and Testing Contract approved 12/17/14
$1,567,600
Net Contractor change order requests
$790,000
Total Requested Overall Contractor Cost
$2,357,600
Increased soft costs (Consultants and Staff)
$327,400
Additional contingencies
$129,400
Project Total (Construction, Soft Costs, and Contingencies)
$3,313,300
Previously Appropriated
$2,066,500
Total additional appropriation request
$1,246,800
Note: The Contractor has notified the District that should they experience an extended delay they will incur and charge additional costs to the project in the amount of $50,000 for additional mobilization. This $50,000 charge has not been included in the costs presented.

12. Recommended Action
Approve and Authorize the Amendment of Existing Agreements and a New Agreement as Necessary for the Completion of Drilling and Testing Activities for Well 38 (Well 28 Replacement) in San Jacinto
Appropriate an Additional $1,246,800 Bringing the Total Project Cost to $3,313,300

13. Brian Powell Director of Planning 951-928-3777 x4278 powellb@emwd.org