HomeMy WebLinkAboutEngineer's Report1111. PO 2844
5 F t i Glenwood Springs„ Co 81602
SERYIC{ ‘ rax303-216-2196
November 26, 2007 Project No. 1436
Bullseye Engineering
Attn: Jeff Odor
2154 Acadia Avenue
Rifle, CO 81650
Subsurface Investigation and Percolation Test
Proposed Single Family Residence
Lot 3, Los Pinones Ranch Subdivision
Garfield County, Colorado
Jefly
ALL SERVICE septic, LLC, performed a subsurface investigation and percolation test for the subject
property, on November 20, 2007. The test was performed in accordance with Garfield County
Regulations.
EXISTING CONDITIONS
The subject property is located in a rural residential area where Onsite Wastewater Systems (OWS)
and wells are necessary. The lot is presently vacant. The slope at the area of the percolation holes
slopes approximately 5% to the southwest, and vegetation consists of sagebrush, juniper trees, with
sparse conifer trees.
SUBSURFACE CONDITIONS AND CONCLUSIONS
The subsurface was investigated by digging one profile pit and three percolation holes, at the locations
indicated on Figure 1. The materials in the profile hole consisted of 1 -foot of sandy topsoil, underlain by
silty sand to 5 feet, underlain by silty sand with basalt boulders to the maximum depth explored of 8 feet.
Groundwater or bedrock was not encountered. Percolation rates ranged from 20 minutes per inch
(MPI) to 27 MPI, with an average rate of 25 MPI.
LIMITS:
Results are based on field investigations and data provided by the client. If soil conditions
encountered are different from conditions described in report, ALL SERVICE septic, LLC should be
notified
Please call with questions.
Sincerely,
ALL SERVICE septic, LLC
Timothy R. Petz
2 copies sent
Reviewed By:
Onsite Wastewater Systems
Richard H. Petz,
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SITE PLAN AND LOCATION OF
PERCOLATION HOLES
SCALE
1" • 100'
NORTH
LOS PINONES RANCH ROAD
TBA ELEV.
6815.27
N88'3216"E
BUILDING ENVELOPE
P-1
0
P-2 ❑
,PROFILE PIT
❑
P-3
LOT 3, LOS PINONES RANCH SUB.
GARFIELD COUNTY, COLORADO
LOT 3
35.482 AC.±
728.55'
ALL
SERVICE SEPTIC, LLC
970-618-5033
PRO. NO. 1436
FIGURE 1
PROFILE HOLE INFORMATION
ALL SERVICE septic, LLC
970-618-5033
PROFILE
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TOPSOIL, ROOT ZONE, CLAY, SANDY
SAND, SILTY, CLAYEY, DENSE, MOIST, WHITE, CALCIUM
CARBONATE SOIL
SAND, SILTY, CLAYEY, DENSE, MOIST, WHITE, BASALT
BOULDERS UP TO 3 FEET IN DIAMETER. CALCIUM
CARBONATE SOIL
NO GROUNDWATER ENCOUNTERED DURING DIGGING OR WHEN
CHECKED ON NOVEMBER 20, 2007
PROJECT NO. 1436 FIGURE 2
GARFIELD COUNTY ENVIRONMENTAL HEALTH DEPARTMENT
Percolation Test and Soils Data Form - TABLE 1 - PROJECT 1436
PROFILE PIT
0 - 1' Root Zone, Sandy, Gravelly
1' - 5' Sand, Silty, Clayey, Dense, Moist, White, Calcium Carbonate Soil
5' - 8' Sand, Silty, Clayey, Dense, Moist, White, With Basalt Boulders
Boulders up to 3' in Diameter, Calcium Carbonate Soil
Date of Test: 11-20-07
Hole Hole Interval Measurement at Measurement at Change (in.) Percolation Rate
No. Depth (in.) (min.) Start of Interval End of Interval (min./in.) MPI
(in.) (in.)
1 37 20 2.50 3.50 1.00
20 3.50 4.75 1.25
20 4.75 6.00 1.25
20 6.00 6.75 0.75
20 6.75 7.50 0.75
20 7.50 8.50 1.00
2 37 20 3.25 4.25 1.00
20 4.25 5.50 1.25
20 5.50 6.50 1.00
20 6.50 7.75 1.25
20 7.75 dry
fill 20 3.00 4.00 1.00
3 32 20 1.75 3.00 1.25
20 3.00 4.25 1.25
20 4.25 5.00 0.75
20 5.00 6.00 1.00
20 6.00 6.75 0.75
20 6.75 7.50 0.75
AVERAGE = 25 MPI
27
20
27