B09_Amd_1_Yosemite_Crane_Flat_Soil_Condition_Assessment_Report_Technicon_0001.pdf

July 6, 2016 TES No. 160578.001

Invoice No. 10764

Mr. Quin Clements

Davido Consulting Group, Inc.

P.O. Box 1132 Freeland, Washington 98249 Email: quin@dcgengr.com

Project: Crane Flat Yosemite Valley, California

Subject: Infiltration Feasibility for Crane Flat Leach Fields

Dear Mr. Sugar:

TECHNICON Engineering Services, Inc., (TECHNICON) prepared this letter to summarize the installation of piezometers, infiltration testing results, and infiltration feasibility for the above referenced project located at the Crane Flat Campground in Yosemite Valley, California. The location of the site is shown on the attached Vicinity map, Figure 1.

This report includes information and test results by TECHNICON as well as information from a report prepared by HWA GeoSciences, Inc. (reference File HWA Project No. 2014-123 T200, dated June 14, 2016). Information from HWA GeoSciences, Inc.’s report is included with indentation herein and is cited at the end of each section of this report.

PROJECT UNDERSTANDING

Based on verbal discussions and emails with National Park Service (NPS) and HWA GeoSciences Inc., as well as a site visit, it is understood that NPS is assessing the feasibility of proposed locations for new leach fields to service restroom facilities at the Crane Flat Campground. The existing effluent disposal facilities at Crane Flat are unable to service all restroom facilities throughout the season which requires multiple portable restrooms to be brought to the campgrounds to be used when service capacity is reached.

The purpose of the investigation was to observe and record the subsurface soil conditions, install piezometers for measuring perched groundwater conditions, and perform percolation tests to assess feasibility of creating new leach fields to service the restroom facilities.

PROJECT BACKGROUND

The campground was constructed in 1963, and consists of five paved loops (A-E) with a total of 166 campsites. There are five restroom facilities, each with their own septic tank and drainfield, as noted and described below in the project Scope of Work:

Loop 100 serves 26 campsites (Bldg 6039) mailto:quin@dcgengr.com

Infiltration Feasibility of Crane Flat Leach Fields TES No. 160578.001 Crane Flat, Yosemite Valley, CA Page 2

Loop 200 / 300 serves 46 and 26 campsites respectively (Bldg 6040)

Loop 400 serves 54 campsites (Bldg 6041 and 6042)

Loop 500 serves 50 campsites (Bldg 6043)

Between 2012 and 2013 effluent was observed to have surfaced at the drainfields associated with Building 6039, 6040, and 6042. Drainfield repairs implemented in association with Building 6039 and 6040 resulted in the successful resuscitation of those drainfields thus bringing restrooms back into operational service for Loops 100, 200, and

300. Drainfield repairs on Building 6042 (Loop 400) were unsuccessful and that restroom has never been put back online; currently portable restrooms are transported in to service that area of the campground. (HWA GeoSciences, Inc., 2016)

GEOLOGY

General geologic information about the Park was obtained from The Geologic Story of Yosemite National Park by N. King Huber (1987) and a published 1:125,000 map entitled Geologic Map of Yosemite National Park, California (Huber et al, 1989).

According to Huber, much of the park geology consists of granitic rocks from multiple magmatic intrusions during the Cretaceous. Paleozoic metamorphic belts of rock are present to the west and east of the exposed granitic batholiths. Bedrock in the park was exposed through broad asymmetric uplift of the Sierra Mountain Range, characterized by a broad western-facing massif abruptly terminated east of the high peaks by range-front faulting that is dropping the crust to the east. Fluvial networks developed on the western slope from long-term erosion, with multiple ages of erosional-depositional terraces documenting the progressive uplift. At least three glaciations during the Pleistocene resulted in ice caps and valley glaciers that modified the landscape. Heavily weathered bedrock was typically stripped away exposing the “fresh” rock one sees in Yosemite Valley in particular. The latest glaciation in the Sierras reached its maximum approximately 15,000 years ago and thereafter retreated.

According to the 1989 geologic map, the bedrock beneath most of the campground consists of Paleozoic metasedimentary rock, which was formed by deep burial of quartz-rich sedimentary rocks. The resulting metamorphic rock consists of quartzite, a highly indurated rock derived from quartz-rich sandstone, and argillite, derived from compression of mudstone or shale. Bedrock in the northeastern portion of the campground was mapped as Cretaceous “granodiorite of Arch Rock”, dated approximately 116 million years old, in the Fine Gold Intrusive Suite. Granodiorite is a particular type of granitic rock with a high proportion of silicic minerals. The approximate volcanic equivalent is rhyodacite, just below rhyolite in silicic content. (HWA GeoSciences, Inc., 2016)

SITE DESCRIPTION

The campground consists of five loops south of Big Oak Flat Road near its junction with the Tioga Road. The USGS 7.5-minute topographic map indicates the campground is at elevations between approximately 6,100 and 6,200 feet. Crane Flat forms a low-relief area on the divide between the headwaters of Little Crane Creek to the south and the valley of Crane Creek to the northeast. The terrain within the campground is gently

Crane Flat, Yosemite Valley, CA Page 3 rolling, with localized relief of up to 25 feet within a given loop. The area is forested with pine and fir, with open forest floor and scattered brush. (HWA GeoSciences, Inc., 2016)

FIELD EXPLORATION

The field exploration, conducted on November 3 through 6, 2015, consisted of drilling fourteen

(14) exploratory profile borings, installing fourteen (14) piezometers, and performing fourteen

(14) percolation tests. The piezometers and percolation tests were spread out amongst the five

(5) loops of the campgorund. The profile borings were drilled to depth of 12 feet below the existing ground surface (bgs). The purpose of the profile borings was to visually classify and record a continuous log of the native soils encountered and to install the piezometer well casings. The percolation tests were performed adjacent to the piezometers at various depths ranging between 2 and 5 feet bgs to assess the infiltration characteristics of the soil. The locations of the piezometers and percolation tests are indicated on the Site Maps, Figures 2 through 4.

EARTH MATERIALS

The following earth material descriptions are based on the profile borings performed for this study.

The twelve (12) profile borings (Pz-1 through Pz-14) were drilled using CME 45 truck mounted drill rig utilizing hollow-stem drilling techniques to a depth of approximately 12 feet bgs. The surface and subsurface soils encountered at each boring location consisted of predominately silty sand in the upper 2 to 4 feet, underlain by sandy silt, clayey sand, poorly graded gravel, and at some locations silty sand comprised of completely weathered in place, friable, decomposed granite. The above is a general description of the earth material profile. A more detailed representation of the stratigraphy at the specific exploration locations is provided on the attached boring logs.

PIEZOMETERS

The fourteen (14) profile borings were completed with piezometer casings. The piezometers were installed to a depth of 12 feet bgs; with the upper 2 feet consisting of 1-inch diameter non-screened casing and the lower 10 feet consisting of 1-inch diameter screened casing (0.02-inch machine slot size). A sand filter pack was installed between depths of 1.5 and 12 feet bgs and a bentonite seal installed between the surface and 1.5 feet bgs. The piezometer casings generally extended above the surround ground surface to a height of 3 feet for convenience.

An approximately 4 to 4.5-foot long, 4-inch diameter Schedule 40 Black PVC standpipe was slipped over the piezometer casing and driven into the ground surface approximately 12 inches for stability. A PVC slip cover was placed over the standpipe.

PERCOLATION TESTS

Fourteen (14) percolation tests (P-1 through P-14) were performed in borings at depths ranging from 4.5 to 5.25 feet bgs using a 4-inch diameter hand auger and CME 45 truck mounted drill rig utilizing a 7.5-inch hollow stem auger to excavate the test holes. The final diameter of the percolation tests ranged between 4.5 to 8-inches in diameter due to reaming of the test hole that occurred with the augers. Approximately ⅜-inch diameter pea gravel was placed in the bottom 2 inches of the test holes and a 2-inch diameter temporary casing was placed on top of

Crane Flat, Yosemite Valley, CA Page 4 the pea gravel. The annulus of the hole was filled with ⅜-inch diameter pea gravel to prevent caving of the test holes. The location of the percolation tests are shown on the Site Maps, Figures 2 through 4. A summary of the percolation test results is presented in Table 1.

TABLE 1

SUMMARY OF PERCOLATION TESTS

Location Soil Tested* Depth

(ft)

Percolation

Rate

(min/in.)

Percolation

Rate

(gpd/sf)**

Application

Rate per

County

(gpd/sf)**

Depth to

Silt or

Bedrock**

Notes**

Loop 100

P-1 Silty SAND (SM)* 4.75 3.6 249.4 1.2 2 SS

P-2 Clayey SAND

(SC)

5.0 45.2 345.3 1.2 4 SS

P-3 Silty SAND (SM) 5.0 2.6 19.9 0.45 8 -

Loop 200, 300

P-4 Silty SAND (SM) 5.0 2.6 345.3 1.2 5 -

P-5 Clayey SAND

(SC)

5.0 42.6 21.1 0.45 10 SS

P-6 Silty SAND (SM)* 5.0 23.1 38.9 0.6 0 -

P-7 Silty SAND (SM)* 5.25 7.4 121.3 0.8 4 -

P-8 Sandy SILT (ML) 4.9 6.5 138.1 0.8 0 -

Loops 400, 500

P-9 Sandy SILT (ML) 5.0 13.0 69.1 0.8 7 -

P-10 Clayey SAND

(SC)

5.0 13.3 67.5 0.8 2 -

P-11 Clayey SAND

(SC)

4.6 61.6 14.6 0.2 2 SS

P-12 Clayey SAND

(SC)

4.5 135.0 6.6 - 0 SS

P-13 Sandy SILT (ML) 5.1 12.3 73.0 0.8 2 -

P-14 Sandy SILT (ML) 4.5 35.3 25.4 0.45 0 -

SS: Requires “specially designed system” *Silty SAND comprised of completely weathered, friable, decomposed granite **Information provided by HWA GeoSciences, Inc.

Crane Flat, Yosemite Valley, CA Page 5

CONCLUSIONS AND RECOMMNENDATIONS

Crane Flat Loop 100

Of the three exploration locations in this area, two (P-1 and P-2) had shallow (2 to 4 feet) depth to low permeability silt zones, but high measured percolation results (2.6 to

3.6 min/in or 17-23 in/hr). The Mariposa County Sewage Disposal Rules require a “specially designed system” for soils with measured percolation rates less than 5 min/in (i.e., high percolation rates). Such designs may include replacing overly permeable soils (i.e., percolation rate less than 1 minute/inch) with “a suitably thick (2 ft) layer of loamy sand or sand.” The other exploration (P-3) had silt at 10 feet, but a lower measured percolation rate (45 min/in or 1.3 in/hr).

This area appears generally unsuitable for a conventional drainfield, unless the area round P-3 (the only favorable exploration location) can be further explored and yields a sufficient area of favorable conditions for a drainfield. (HWA GeoSciences, Inc., 2016)

Crane Flat Loop 200, 300

Although measured percolation rates were generally within the acceptable range per the Mariposa County Sewage Disposal Rules, of the five exploration locations, four had shallow depths to low permeability soils (0 to 5 feet). The one location (P-5) with deeper receptor soils (10 feet to silt layer) had the lowest measured percolation rate (43 min/in or 1.4 in/hr), and soils above the silt layer were clayey.

This area appears unsuitable for a conventional drainfield. (HWA GeoSciences, Inc., 2016)

Crane Flat Loop 400, 500

Five of the 6 exploration locations in this area had shallow (0 to 2 feet) depth to low permeability silt zones. Of these, 2 locations (P-11 and P-12) also had very low measured infiltration rates which require a “specially designed system” per the Mariposa County Sewage Disposal Rules.

This area appears generally unsuitable for a conventional drainfield, unless the area round P-9 (the only favorable exploration location) can be further explored and yields a sufficient area of favorable conditions for a drainfield. (HWA GeoSciences, Inc., 2016)

Ground Water Level

Although no ground water was detected in any of the explorations (conducted in the fall), based on prior studies it is expected to be seasonally high at both Crane Flat and Glacier Point sites. The Mariposa County Sewage Disposal Rules require a vertical separation from seasonal high ground water of 5 feet from the bottom of the facility.

Assuming a minimum depth of 18 inches, maximum allowable seasonal high ground water is 6.5 feet below grade. Due to this design criterion, ground water level monitoring is recommended in the piezometers for at least one high ground water

Crane Flat, Yosemite Valley, CA Page 6 season, which is expected in late spring or early summer, after the snowmelt. HWA recommends measurements at least once a week. Remote (or all) areas may be monitored using data logging pressure transducers, which can be left in the piezometers for extended time periods and the data retrieved afterwards. (HWA GeoSciences, Inc., 2016)

SUMMARY

If poor soils or high ground water are a design-limiting factor for conventional drainfields, on-site wastewater treatment design should consider systems that do not rely on soil for treatment. These systems are typically designed to discharge effluent that meets regulatory standards at the point of discharge from the treatment vessel to soil.

Examples include septic mound systems, packed bed filters, recirculating sand/gravel beds, bioreactors/bio filters, etc. Treated effluent meeting discharge criteria can likely be discharged to large drainfields (sized based on the soil capacity with no consideration of treatment capacity). (HWA GeoSciences, Inc., 2016)

Drainfield Design Considerations

If site conditions allow, maximizing the aspect ratio of the drain field (length:width) is always advantageous, i.e., the more geographically spread out the given square feet of absorption area is, the better the system will perform, as the water will be spread over a larger effective area. Orienting the drain fields parallel to slope is also preferred, because shallow ground water flow in the study area likely follows the bedrock surface, which in turn mirrors the topography. (HWA GeoSciences, Inc., 2016)

LIMITATIONS

The information and conclusions presented in this report are based on the information provided regarding the proposed project, and the results of our field and laboratory investigation, combined with interpolation of the subsurface conditions between sample locations. The findings of this study are for the preliminary planning and on-going study of proposed future disposal fields.

Additional investigation and testing is necessary to complete design and construction plans and fulfill the requirements of Mariposa County. The nature and extent of the variations may not become evident until further exploration in design stages.

Our professional services were performed, our findings obtained, and our recommendations prepared in accordance with generally accepted engineering principles and practices. This warranty is in lieu of all other warranties either expressed or implied. This report should not be construed as an environmental audit or study.

REFERENCES

Huber, N. King, 1987. The Geologic Story of Yosemite National Park, http://www.yosemite.ca.us/library/geologic_story_of_yosemite/maps.html

Huber, N. King, Batemen, Paul C., and Warrhaftig, Karl, 1989. Geologic Map of Yosemite National Park and Vicinity, California, USGS Miscellaneous Investigation Series Map I-1874.

http://www.yosemite.ca.us/library/geologic_story_of_yosemite/maps.html

Crane Flat, Yosemite Valley, CA Page 7

HWA GeoSciences Inc., 2016. Hydrogeologic Investigation for Wastewater Improvements, Glacier Point and Crane Flat Campground, June 14, 2016.

National Park Service, 1995. Glacier Point Rehabilitation Project Yosemite National Park, September 7, 1995.

Winzler & Kelly Consulting Engineers, 2006. Title I Report, Yosemite National Park Glacier Point Wastewater System. June 2006.

CLOSING

Thank you for your valued business. We trust this report will satisfy your needs. Should you have any questions or if we may be of further assistance to you, please call our office.

Sincerely, TECHNICON Engineering Services, Inc.

Stephen P. Plauson, PE, GE

Geotechnical Engineering Manager

SPP:AA:mk

Attachments: Vicinity Map, Figure 1 Site Maps, Figures 2 through 4 Key to Symbols and Boring Logs Percolation Test Reports

No. 2731

Exp. 9/30/17

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA PROJECT NUMBER 160578

LITHOLOGIC SYMBOLS

FILL

WELL GRADED SAND

POORLY GRADED SAND

SILTY SAND

CLAYEY SAND

PEAT

LOW PLASTICITY ORGANIC SILT

HIGH PLASTICITY ORGANIC SILT

LOW PLASTICITY SILT

HIGH PLASTICITY SILT

WELL GRADED GRAVEL

POORLY GRADED GRAVEL

SILTY GRAVEL

CLAYEY GRAVEL

LOW PLASTICITY CLAY

HIGH PLASTICITY CLAY

LIQUID LIMIT (%)

PLASTIC INDEX (%)

MOISTURE CONTENT (%)

DRY DENSITY (PCF)

DEGREE OF SATURATION (%)

NON PLASTIC

PERCENT PASSING NO. 200 SIEVE

POCKET PENETROMETER (TSF)

LL

PI

W

DD

S

NP

-200

PP

KEY TO SYMBOLS

STANDARD PENETRATION TEST

CALIFORNIA SAMPLER

MODIFIED CALIFORNIA SAMPLER

SHELBY TUBE SAMPLER

ROCK CORE BARREL

BULK SAMPLE

Assumed stratum line

SAMPLER SYMBOLS

Water Level at End of Drilling

Water Level After 24 Hours

Observed stratum line

(Unified Soil Classification System)

Water Level at Time of Drilling

Note 1: The degree of saturation shown on the boring logs is based on an assumed specific gravity of 2.65. The actual degree of saturation may vary.

Note 2: The stratum lines shown on the logs represent the approximate boundary between soil types; the actual in-situ transition may be gradual.

TV

PID

UC

ppm

ABBREVIATIONS

TORVANE

PHOTOIONIZATION DETECTOR

UNCONFINED COMPRESSION

PARTS PER MILLION

SW

SP

SM

SC

PT

OL

OH

ML

MH

GW

GP

GM

GC

CL

CH

DATE OF EXPLORATION 11/3/2015

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Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622 Telephone: (559) 276-9311 Fax: (559) 276-9344

Clayey SAND (SC) - brown, moist, fine to coarse grained With organics No organics, trace coarse gravel Silty SAND (SM) - light brown, moist, fine to coarse grained, some clay, some fine gravel

Silty SAND (SM) - light brown, moist, fine to coarse grained, comprised of completely weathered friable decomposed granite

NOTES:

1. Bottom of boring at 4.8 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

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COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 4.75 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 1

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - dark brown, moist, with fine sand

Decreased silt Clayey SAND (SC) - dark orangeish brown, moist, fine to medium grained, low plasticity, trace fine to coarse gravel

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

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COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 2

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Silty SAND (SM) - dark brown, moist, fine to medium grained, trace organics

Brown, trace fine to coarse gravel

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

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COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 3

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Silty SAND (SM) - brown, moist, fine to medium

Some organics

Light brown, with fine to coarse gravel

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

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COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 4

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Clayey SAND (SC) - reddish brown, moist, fine to coarse grained, with fine gravel, some organics

Blackish brown, wet

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

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COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 5

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Clayey SAND (SC) - reddish brown, moist, fine to coarse grained, trace fine gravel, with organics

Light brown, decreased clay

Silty SAND (SM) - light brown, moist, fine to coarse grained, comprised of completely weathered friable decomposed granite

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

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S A

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T

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D E

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H (f t)

COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 6

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

With decomposed wood

Sandy SILT (ML) - grayish brown, moist, with fine sand Silty SAND (SM) - gray, moist, fine to coarse grained, comprised of completely weathered friable decomposed granite

NOTES:

1. Bottom of boring at 5.3 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

D R

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Y (p cf

B

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W S

/f t

G R

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TESTS

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D E

P T

H (f t)

COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5.25 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 7

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - light brown, moist, with fine sand

NOTES:

1. Bottom of boring at 4.9 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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S

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Y (p cf

B

LO

W S

/f t

G R

A P

H

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REMARKSOTHER

TESTS

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D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 7.5-inch Hollow Stem Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 4.9 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 8

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Some fine to coarse gravel

Sandy SILT (ML) - light brown, moist, with fine sand

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

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G

M O

IS

T

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REMARKSOTHER

TESTS

S A

M P

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D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 7.5-inch Hollow Stem Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P- 9

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Clayey SAND (SC) - brown, moist, fine to coarse grained, with fine to coarse gravel

NOTES:

1. Bottom of boring at 5.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/3/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

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REMARKSOTHER

TESTS

S A

M P

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T

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E

D E

P T

H (f t)

COMPLETED 11/3/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE

DRILLING METHOD Hand Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P-10

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/3/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Clayey SAND (SC) - brown, moist, fine to medium grained, low plasticity

NOTES:

1. Bottom of boring at 4.6 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 7.5-inch Hollow Stem Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 4.6 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P-11

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - brown, moist, with fine sand

Clayey SAND (SC) - grayish brown, moist, fine to coarse grained, low plasticity, trace fine to coarse gravel

NOTES:

1. Bottom of boring at 4.5 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

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REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 7.5-inch Hollow Stem Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 4.5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P-12

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622 grained, with fine sand Sandy SILT (ML) - reddish brown, moist

NOTES:

1. Bottom of boring at 5.1 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 7.5-inch Hollow Stem Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 5.1 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P-13

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622 medium grained Sandy SILT (ML) - orangeish brown, moist, some fine to coarse gravel, some fine sand

NOTES:

1. Bottom of boring at 4.5 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/1/74.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/1/74

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 7.5-inch Hollow Stem Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 4.5 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING P-14

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - orangeish brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/5/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/5/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 1

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/5/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622 medium grained, trace clay

Clayey SAND (SC) - brown, moist, fine grained, low plasticity

Wet

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/5/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/5/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 2

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/5/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Trace fine to coarse gravel, partially comprised of completely weathered friable decomposed granite

Sandy SILT (ML) - brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/5/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/5/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 3

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/5/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/5/15.

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P J

MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/5/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 4

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/5/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Fine grained

Dark brown

Brown

Sandy SILT (ML) - light brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/5/15.

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MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/5/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 5

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/5/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - light brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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T .G

P J

MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 6

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622 grained, trace fine gravel

Sandy SILT (ML) - brown, moist, trace fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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P J

MATERIAL DESCRIPTION

D R

Y D

E N

S

IT

Y (p cf

B

LO

W S

/f t

G R

A P

H

IC

LO

G

M O

IS

T

U R

E

REMARKSOTHER

TESTS

S A

M P

LE

T

Y P

E

D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 7

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - brown, moist, trace fine sand

Increased fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 8

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Poorly Graded GRAVEL (GP) - blackish brown, moist, fine to coarse grained, trace fine sand

Sandy SILT (ML) - brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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G R

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H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz- 9

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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G R

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TESTS

S A

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H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz-10

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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G R

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TESTS

S A

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H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz-11

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - brown, moist, with fine sand

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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B

LO

W S

/f t

G R

A P

H

IC

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G

M O

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REMARKSOTHER

TESTS

S A

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D E

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H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz-12

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - reddish brown, moist, with fine sand

Light brown

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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B

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W S

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G R

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H

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M O

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REMARKSOTHER

TESTS

S A

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D E

P T

H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz-13

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Sandy SILT (ML) - orangeish brown, moist, with fine sand Light brown

NOTES:

1. Bottom of boring at 12.0 feet.

2. No groundwater encountered.

3. Boring backfilled with soil cuttings 11/4/15.

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MATERIAL DESCRIPTION

D R

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B

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G R

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H

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G

M O

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REMARKSOTHER

TESTS

S A

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D E

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H (f t)

COMPLETED 11/4/15

PROJECT NAME Crane Flat

PROJECT LOCATION Yosemite Valley, CA

DRILL RIG TYPE CME 45

DRILLING METHOD 4-inch Solid Flight Auger

PROJECT NUMBER 160578

GROUND ELEVATION

SURFACE DESCRIPTION Bare Soil

BORING DEPTH 12 ft

LOGGED BY A. AhTye CHECKED BY S. Plauson

BORING Pz-14

DRILLING CONTRACTOR TECHNICON Engineering Services

DATE STARTED 11/4/15

GROUND WATER LEVEL No groundwater encountered.

Technicon Engineering Services, Inc 4539 N. Brawley Avenue #108 Fresno, CA 93622

Project Name: Project No.:

Project Location: Pit No.:

A. 3

B. 15

C. -

D. 4.5 - 6.0

E. 2

F. 99.88

G 4.75 (57)

Date & Time Saturated

Depth of Water after 24-hour Saturation

Begin Initial Depth Refilled End Final Depth Water Drop Rate

Test to Water*, in. Test to Water*, in. Drop, in. min./in.**

9:00 90.8 X 9:08 95.9 5.0 2.5

9:08 91.9 X 9:15 96.1 4.2 2.7

9:15 91.4 X 9:23 95.9 4.4 3.0

9:23 91.9 X 9:32 95.9 4.0 3.6

9:32 91.9 X 9:41 95.9 4.0 3.7

9:41 91.9 X 9:50 95.9 4.0 3.6

9:50 91.9 X 9:59 95.9 4.0 3.6

9:59 91.9 X 10:08 95.9 4.0 3.6

10:08 91.9 X 10:17 95.9 4.0 3.6

3.6 Silty Sand comprised of completely weathered friable decomposed granite

*Depth below reference datum

**Corrected for full depth gravel in annulus

Average (Last 6) =

Construction Testing & Inspection * Geotechnical & Environmental Engineering

PERCOLATION TEST DATA SHEET

Crane Flat

Yosemite Valley, CA

160578

P-1

Total Gravel Thickness, in.

Distance from Shelf, ft.

Hole Diameter, in.

Reference Depth, in.

8.0

Depth to Groundwater

10/3/15 9:00 AM

Silty SAND (SM)

Test

Duration, min.

Hole Depth, ft. (in.)

7.2

8.5

9.1

9.0

9.1

9.0

9.1

Gravel Layer Depth, in.

Casing Diameter, in.

Soil Type

9.0

C D

A

B

F

G

E

A. 2

B. 16

C. -

D. 4.5 - 6.0

E. 2

F. 101

G 5 (60)

Date & Time Saturated

Depth of Water after 24-hour Saturation

Begin Initial Depth Refilled End Final Depth Water Drop Rate

Test to Water*, in. Test to Water*, in. Drop, in. min./in.**

11:11 84.72 X 13:01 91.9 7.2 24.4

13:01 91.92 13:31 93.1 1.2 40.0

13:31 93.12 14:05 94.3 1.2 45.3

14:05 94.32 14:25 95.0 0.7 44.4

14:25 95.04 15:07 96.4 1.3 50.9

45.2 Silty Sand comprised of completely weathered friable decomposed granite

*Depth below reference datum

**Corrected for full depth gravel in annulus

Average (Last 4) =

42.0

Test

Duration, min.

30.0

34.0

20.0

Hole Depth, ft. (in.)

Depth to Groundwater

Soil Type Clayey SAND (SC)

11/3/15 10:00 AM

Gravel Layer Depth, in.

Total Gravel Thickness, in.

Distance from Shelf, ft.

Hole Diameter, in.

Casing Diameter, in.

Reference Depth, in.

Construction Testing & Inspection * Geotechnical & Environmental Engineering

PERCOLATION TEST DATA SHEET

Crane Flat 160578

Yosemite Valley, CA P-2

C D

A

B

F

A. 2

B. 14

C. -

D. 4.5 - 6.0

E. 2

F. 102.6

G 5 (60)

Date & Time Saturated

Depth of Water after 24-hour Saturation

Begin Initial Depth Refilled End Final Depth Water Drop Rate

Test to Water*, in. Test to Water*, in. Drop, in. min./in.**

9:00 94.6 X 9:05 98.5 4.0 2.3

9:05 94.6 X 9:10 98.5 4.0 2.3

9:10 94.6 X 9:17 98.9 4.3 2.6

9:17 94.6 X 9:23 98.5 4.0 2.5

9:23 94.6 X 9:30 98.5 4.0 2.6

9:30 94.6 X 9:36 98.5 4.0 2.6

9:36 94.6 X 9:42 98.5 4.0 2.6

9:42 94.6 X 9:48 98.5 4.0 2.6

9:48 94.6 X 9:54 98.5 4.0 2.6

9:54 94.6 X 10:00 98.5 4.0 2.6

10:00 94.6 X 10:06 98.5 4.0 2.6

10:06 94.6 X 10:12 98.5 4.0 2.6

2.6 Silty Sand comprised of completely weathered friable decomposed granite

*Depth below reference datum

**Corrected for full depth gravel in annulus

Average (Last 6) =

6.3

6.3

6.4

6.3

6.4

6.4

6.3

6.4

Test

Duration, min.

5.7

5.8

7.0

6.3

Hole Depth, ft. (in.)

Depth to Groundwater

Soil Type Silty SAND (SM)

10/3/15 9:00 AM

Gravel Layer Depth, in.

Total Gravel Thickness, in.

Distance from Shelf, ft.

Hole Diameter, in.

Casing Diameter, in.

Reference Depth, in.

Construction Testing & Inspection * Geotechnical & Environmental Engineering

PERCOLATION TEST DATA SHEET

Crane Flat 160578

Yosemite Valley, CA P-3

C D

A

B

F

A. 2

B. 14

C. -

D. 4.5 - 6.0

E. 2

F. 89.84

G 5 (60)

Date & Time Saturated

Depth of Water after 24-hour Saturation

Begin Initial Depth Refilled End Final Depth Water Drop Rate

Test to Water*, in. Test to Water*, in. Drop, in. min./in.**

11:00 81.8 X 11:05 86.4 4.6 1.9

11:05 81.8 X 11:10 85.8 4.0 2.0

11:10 81.8 X 11:15 85.8 4.0 2.3

11:15 81.8 X 11:22 85.8 4.0 2.5

11:22 81.8 X 11:28 85.8 4.0 2.6

11:28 81.8 X 11:35 85.8 4.0 2.6

11:35 81.8 X 11:41 85.8 4.0 2.6

11:41 81.8 X 11:48 85.8 4.0 2.6

11:48 81.8 X 11:54 85.8 4.0 2.6

11:54 81.8 X 12:00 85.8 4.0 2.6

12:00 81.8 X 12:07 85.8 4.0 2.6

12:07 81.8 X 12:13 85.8 4.0 2.6

2.6 Silty Sand comprised of completely weathered friable decomposed granite

*Depth below reference datum

**Corrected for full depth gravel in annulus

Average (Last 6) =

6.5

6.4

6.5

6.5

6.4

6.4

6.5

6.5

Test

Duration, min.

5.5

5.0

5.8

6.1

Hole Depth, ft. (in.)

Depth to Groundwater

Soil Type Silty SAND (SM)

10/3/15 10:00 AM

Gravel Layer Depth, in.

Total Gravel Thickness, in.

Distance from Shelf, ft.

Hole Diameter, in.

Casing Diameter, in.

Reference Depth, in.

Construction Testing & Inspection * Geotechnical & Environmental Engineering

PERCOLATION TEST DATA SHEET

Crane Flat 160578

Yosemite Valley, CA P-4

C D

A

B

F

A. 2

B. 14

C. -

D. 4.5 - 6.0

E. 2

F. 63.44

G 5 (60)

Date & Time Saturated

Depth of Water after 24-hour Saturation

Begin Initial Depth Refilled End Final Depth Water Drop Rate

Test to Water*, in. Test to Water*, in. Drop, in. min./in.**

11:24 54.7 X 11:44 57.6 2.9 11.1

11:44 57.6 11:56 58.2 0.6 32.0

11:56 58.2 12:13 58.9 0.7 37.8

12:13 58.9 12:27 59.3 0.4 62.2

12:28 55.4 X 12:47 56.5 1.1 28.1

12:47 56.5 13:40 59.4 2.9 29.4

13:41 55.6 X 14:18 58.0 2.4 24.7

14:18 58.0 14:35 58.7 0.7 37.8

14:35 58.7 14:57 59.2 0.5 73.3

42.6 Silty Sand comprised of completely weathered friable decomposed granite

*Depth below reference datum

**Corrected for full depth gravel in annulus

Average (Last 6) =

19.0

53.0

37.0

17.0

22.0

Test

Duration, min.

20.0

12.0

17.0

14.0

Hole Depth, ft. (in.)

Depth to Groundwater

Soil Type Clayey SAND (SC)

11/3/15 1:00 PM

Gravel Layer Depth, in.

Total Gravel Thickness, in.

Distance from Shelf, ft.

Hole Diameter, in.

Casing Diameter, in.

Reference Depth, in.

Construction Testing & Inspection * Geotechnical & Environmental Engineering

PERCOLATION TEST DATA SHEET

Crane Flat 160578

Yosemite Valley, CA P-5

C D

A

B

F

A. 2

B. 16

C. -

D. 4.5 - 6.0

E. 2

F. 90.92

G 5 (60)

Date & Time Saturated

Depth of Water after 24-hour Saturation

Begin Initial Depth Refilled End Final Depth Water Drop Rate

Test to Water*, in. Test to Water*, in. Drop, in. min./in.**

14:00 80.6 X 14:10 81.6 1.0 16.7

14:10 81.6 14:32 83.5 1.9 18.3

14:32 83.5 14:54 85.4 1.9 18.3

14:54 85.4 15:29 87.4 1.9 29.2

7:00 82.9 X 7:10 83.8 0.8 19.0

7:10 83.8 7:43 86.4 2.6 20.0

7:43 86.4 7:56 87.1 0.7 28.9

8:00 81.7 X 8:14 83.0 1.3 17.0

8:14 83.0 8:35 84.6 1.6 21.5

8:35 84.6 8:53 85.9 1.3 21.8

8:53 85.9 9:15 87.1 1.2 29.3

23.1 Silty Sand comprised of completely weathered friable decomposed granite

*Depth below reference datum

**Corrected for full depth gravel in annulus

Average (Last 6) =

22.0

10.0

33.0

13.0

14.0

21.0

18.0

Test

Duration, min.

10.0

22.0

22.0

35.0

Hole Depth, ft. (in.)

Depth to Groundwater

Soil Type Silty SAND (SM)

11/3/15 2:00 PM

Gravel Layer Depth, in.

Total Gravel Thickness, in.

Distance from Shelf, ft.

Hole Diameter, in.

Casing Diameter, in.

Reference Depth, in.

Construction Testing & Inspection * Geotechnical & Environmental Engineering

PERCOLATION TEST DATA SHEET

Crane Flat 160578

Yosemite Valley, CA P-6

C D

A

B

F

A. 2

B. 17

C. -

D. 4.5 - 6

E.