Hill AFB Bldg 518 - TC Drilling Log.pdf

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Multiple Award Construction Contract (MACC)
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FA8201-11-R-0008
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Test borehole drilling log (In response to Question 74)

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Hill Air Force Base, Building 518 Ogden, UT

Geothermal Soil Analysis

DRILLING LOG - Test Borehole #1

Location: Legal N 1708' W 361' from S4 S05 T4N R1W SLB&M Approx. Address:

GPS 41° 6' 29.71" N, 111° 58' 46.64" W, WGS84 E. of Bldg. 518 Elevation 4809' SW of D Ave. and 8th St.

Hill Air Force Base, Ogden, UT Driller: Bertram Drilling, Inc - Kevin Smidt

State License #: 227 Rig: #392 (Mayhew 11) Joints on rig: 19

Drilling Fluid: Cetco Super Gel X with some T100 Polymer Length of Joints: 20' Loop: Centennial 1.25" x 810' Length of Kelly: 20'

Grout: GeoPro Thermal Grout Select (TGS) 1.07 (6:1)

SPUD/TD: 9:26 4/27/2010 - 13:31 4/27/2010

Spud with: 5-1/8" re-tipped milltooth tricone bit

Surface Water: None

NOTE: Time gaps represent connections or unrelated activity.

Time Duration Start End Activity Minutes Depth Comments

4/27/2010 9:26 9:34 D 8 0-10 9:34 9:38 D 4 10-20 9:38 9:44 9:44 9:48 D 4 20-30 9:48 9:51 D 3 30-40 9:57 10:01 D 4 40-50

10:01 10:05 D 4 50-60 10:09 10:12 D 3 60-70 10:12 10:16 D 4 70-80 10:19 10:23 D 4 80-90 10:23 10:25 D 2 90-100 10:27 10:30 D 3 100-110 10:30 10:32 D 2 110-120 10:34 10:38 D 4 120-130 10:38 10:40 D 2 130-140 Gvl.

10:42 10:45 D 3 140-150 10:45 10:47 D 2 150-160 10:50 10:53 D 3 160-170 10:53 10:55 D 2 170-180 10:58 11:02 D 4 180-190 11:02 11:05 D 3 190-200 11:05 11:15 11:15 11:18 D 3 200-210 11:18 11:20 D 2 210-220 11:23 11:25 D 2 220-230 11:25 11:28 D 3 230-240 11:30 11:33 D 3 240-250 11:33 11:35 D 2 250-260 11:39 11:45 D 6 260-270 11:45 11:50 D 5 270-280 11:54 12:03 D 9 280-290 12:03 12:09 D 6 290-300

30-35': silty brown clay; 35-40: brown clay

AA

Brown clay

AA

AA

Sandy brown clay, tr black sand, tr fine gravel

AA

Brown silty sand w/ trace gravels

Rig up

Light brown / dark brown sandy clay

0-3': topsoil; 3-10': brown silty/sandy clay

Brown silty sand w/ trace gravels

AA

AA

AA

AA

Sandy brown clay w/ fine gravels

AA

Brown clay, tr coarse sand

Sandy brown clay, tr fine gravel

4/27-29/2010

Replace kelly guide bearing

AA

AA

Sandy brown clay, tr gravel, tr, black sand

AA

AA

Sandy brown clay, tr blk sand - getting sticky - red. pulldown

Fine gravels w sandy brown clay

Sandy brown clay, tr fine black gravel Sandy brown clay, large gravel Sandy brown clay, large gravel, tr fine black gravel

Mud thick, circulate & thin mud

AA

B ro w n

S an dy C la y w / G ra ve ls B ro w n S an dy

C la y w

/ G ra ve ls

DRILLING LOG - Test Borehole

12:13 12:24 D 11 300-310 12:24 12:31 D 7 310-320 12:35 12:41 D 6 320-330 12:41 12:45 D 4 330-340 12:49 12:52 D 3 340-350 12:52 12:58 D 6 350-360 13:04 13:12 D 8 360-370 13:12 13:16 D 4 370-380 13:20 13:27 D 7 380-390 13:27 13:31 D 4 390-400 13:31 14:00 Ream & Circ.

SDFN - Run for grouting materials.

4/28/2010

10:20 10:55 Rig up. RIH to 400'. Water ~80'. Ream & Circ. Last 40' 10:55 11:08 POOH - no problems

Total Drilling Time: 169.00 Minutes Drilling 0 - 400'

2.82 Hours

4/28/2010 11:08 11:12 RIH HDPE loop to 400' 11:33 11:37 RIH flexible hose tremie to 380' 11:37 13:05 Pump 11 units TGS 1.07 with returns to surface 14:10 14:18 Grout subsided 20'. RIH tremie to tag grout - pump 1 more unit TGS 1.07 with returns.

4/29/2010 Top off with approx. 6 gallons TGS 1.07

COMMENTS:

Frequent reaming and circulation between joints to clear sticky clay.

Total units grout used: 12 units TGS 1.07 Estimated water used to drill borehole: approx. 1500 gal.

HDPE loop pressure tested to 108 PSI overnight.

From 0-140': Drilling observed and samples logged by Van Riding of Earthfax Engineering.

From 140-400': Drilling observed and samples logged by David Eckels of Sound Geothermal.

AA

AA

Gray brown clay, tr black sand

AA

AA

AA

Sandy brown clay, tr black sand, tr fine gravel

AA

AA - sticky Sandy brown clay, tr black sand, tr L gravel ~315'

G ry

-B rn

C la y

Geothermal Soil Analysis

Colors: Descriptors: Lithology: Drilling:

blk - black ang - angular bas - basalt AA - As Above blu - blue cmt - cement bdl - boulder PU - Pick Up brn - brown crs - coarse cbl - cobble POOH - Pull out of hole bu - buff dk - dark cche - caliche RIH - Run in hole clr - clear f - fine cgl - conglomerate RU - Rig Up crm - cream frm - firm cl - clay SDFN - Shut down for night gn - green hd - hard dol - dolomite TD - Total Depth gry - gray L - Large grt - granite pk - pink lt - light grv - gravel rd - red M - Medium ls - limestone tn - tan mtrx - matrix qtz - quartzite trnsl - translucent S - Small sd - sand wh - white sbang - sub angular sh - shale yel - yellow sft - soft slt - silt tr - trace slts - siltstone uncons - unconsolidated ss - sandstone volc - volcanics

LEGEND

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