HomeMy WebLinkAboutTract Map 13018 Parcel 1 Soils Percolation Test Resultss ;
7 . 2
Soils Percolation Test Results
EnGEN
For On-site Sewage Effluent Disposal
41625 Enterprise Grde South,
B-2,Temecula Califomia 92590 Percolation Report Number: 2347
951.296.3511 -Fw 951.296.3711
www.engencorp.com
Platts Residence
APN: 955-050-0011
Green Tree Road, Temecula, California
Project Number: 4166P
May 21, 2015
1
1
Prepared for:
Dr. and Mrs. John Platts
41575 Avenida Bourdox
Temecula, California 92592
1
Platts Residence
Project Number 4166P
TABLE OF CONTENTS
SECTION NUMBER AND TITLE PAGE
1.0 PROPOSED DEVELOPMENT AND PURPOSE FOR PERCOLATION TESTING....................................................... 1
1.1 PROPOSED DEVELOPMENT: ......................................................................................................................................1
1.2 PURPOSE FOR PERCOLATION TESTING:......... ............ .. ESTING:......... ............ .. 1
2.0 SITE DESCRIPTION AND TOPOGRAPHY..........................................................................................................2
2.1 SITE DESCRIPTION:..................................................................................................................................................2
2.2 SOIL CONDITIONS AND PROPOSED LEACH FIELD AREA LOCATION:....................................................................................2
3.0 SUBSURFACE STUDY......................................................................................................................................2
3.1 EXPLORATORY EXCAVATION:.....................................................................................................................................2
3.2 PROTECTION OF GROUNDWATER MONITORING WELL:..................................................................................................3
3.3 PERCOLATION TESTING:...................................................................................................... ..... ..............................3
3.4 EARTH MATERIALS:.................................................................................................................................................3
3.5 GROUNDWATER:................................................................................................. ............. ....................................4
4.0 PRELIMINARY SYSTEM DESIGN RECOMMENDATIONS...................................................................................4
4.1 DESIGN CRITERIA:...................................................................................................................................................4
4.2 EXPANSION AREA: ..................................................................................................................................................4
4.3 GRAVITY FLOW: ............................................................... ....... ........................................................... .............5
4.4 GRADING ON SEWAGE DISPOSAL AREA:.................................................................. ...................................................5
5.0 GUIDELINES FOR SEWAGE DISPOSAL SYSTEM USE ........................................................................................5
5.1 GENERAL: ........................................ ... . .............. . ............................ ...... ..... ..............................................5
5.2 MINIMIZE THE LIQUID LOAD:..................................................................... ..............................................................5
5.3 MINIMIZE THE SOLIDS LOAD:........................................................................... ...... .... ..... .................................5
5.4 SEPTIC TANK ADDITIVES:...........*.....***'*.............. ...............*...—*.. .......... ....... ....... ..... ...*.....**.............*.................6
5.5 VEHICLE TRAFFIC:..................................... ............ ........ ....... ............... . ..... ..... ..........................................6
5.6 IF THE SYSTEM FAILS: ...................................................... .......................................................................................6
6.0 CONCLUSIONS...............................................................................................................................................6
6.1 SUFFICIENT AREA STATEMENT:..................................................................................................................................6
6.2 NATURAL GROUND STATEMENT:...............................................................................................................................6
6.3 SOIL PARTICLE SIZE STATEMENT:................ ................................................... ...... . .... ...... .....................................6
6.4 GROUNDWATER:................................................................................ ............... ...................................................6
7.0 CLOSURE .......................................................................................................................................................7
Appendices:
Appendix 1 - Percolation Test& Grain Size Analysis Results
Appendix 2 - Exploratory Backhoe Logs
Plate 1
1
1
1
1
1
EnG1 f
1 May 21, 2015
Dr. and Mrs. John Pratts
41575 Avenida Bourdoxu
Temecula, California 92592
Subject: Percolation Testing for on-site Sewage Effluent Disposal (Leach Line)
Platts Residence; APN 955-050-011 — Percolation Report Number: 2347
2.60 Acres South of Green Tree Road, City of Temecula, Riverside County
Project Number: 4166P
References:Bratene Construction & Engineering, Site Plan, Platts Residence,
Parcel 1 of Parcel Map 13018, plan undated.
Dear Dr. and Mrs. Platts:
In accordance with your request and signed work order, EnGEN Corporation has performed Soils Percolation
Testing on the above referenced project in order to provide design rates for the planned on-site sewage
disposal system in the areas tested for the residential structure at the subject site. Submitted herewith are the
test results, along with the supporting data.
1.0 PROPOSED DEVELOPMENT AND PURPOSE FOR PERCOLATION TESTING
1.1 Proposed Development:
The proposed development for the subject site will be a single-family residential structure and
associated hardscape and landscape improvements. The area for the proposed leach field is
located west and southwest of the proposed structure area in native, undisturbed ground, (see
Plate 1).
1.2 Purpose for Percolation Testing:
The purpose for the percolation testing is to provide the design rate and designation of leach field
location to accommodate on-site sewage effluent disposal per Riverside County Department of
Environmental Health requirements.
1
1
1
1
41625 Enterprise Circle South. B-25emecula California 92590 951.296.351 1 -Fax 951.296.371 1
Platts Residence
Project Number:4166P
May 2015
Page 2
2.0 SITE DESCRIPTION AND TOPOGRAPHY
2.1 Site Description:
The subject property consists of a irregular shaped, approximately 2.6 acre parcel of undeveloped
land, located south of the Green Tree Road, City of Temecula, California. Topography is essentially
very gently sloping to the southeast.
2.2 Soil Conditions and Proposed Leach Field Area Location:
The site soil conditions consist of essentially interbedded deposits of sands and sand/silt/clay
mixtures, which extend from the existing surface to a depth of approximately 9 feet. These soils
deposits are underlain to the maximum depth explored by a sandstone bedrock unit commonly
referred to as the Pauba Formation Bedrock(map symbol Qps). The Pauba Formation is a geologic
formation found throughout the Temecula Valley and is a Pleistocene age sandstone that is
extensively cross-bedded, moderately to well indurated and contains locally intervening cobbles
and boulder conglomerate beds. Topography across the proposed leach field areas is very gently
sloping terrain with surface drainage in general to the southeast at a gradient of less than 10
percent.
1
3.0 SUBSURFACE STUDY
3.1 Exploratory Excavation:
An inspection of the subsurface conditions within the proposed leach field area was conducted to
evaluate underlying earth materials and the presence of groundwater. The explored location is
denoted on the Percolation Feasibility Study Site Plan (Plate 1). One (1) suitable exploratory
backhoe pit (TP-1) was excavated on the subject site to a maximum depth of approximately 15-
feet below ground surface (bgs) within the proposed leach field area. The exploratory pit was
logged for earth materials and subsurface conditions encountered by a qualified professional from
this firm. The materials were described in general accordance with the Unified Soils Classification
System (USCS) using visual-manual procedures. Upon completion of exploration, an approximate
15-foot long, 3-inch in diameter perforated PVC pipe was extended to the bottom of the pit and was
backfilled with native earth materials. The PVC pipe was wrapped in a nylon fabric mesh "sock'
to prevent infiltration of fine particles). The pipe will serve as a groundwater monitoring well for
the purpose of verifying the findings of this report and Health Dept. Inspection. The exploratory pit
was backfilled with reasonable effort to restore the area in question to its natural condition. As with
any area as small and deep as a backhoe pit, consolidation and subsidence of the backfill soil may
result in time, causing a depression of the area and a potentially hazardous condition. The client
is advised to periodically examine the excavated area and, if necessary, backfill any noted
depressions.
EnGEN Corporation
tPlatts Residence
Project Number: 4166P
t May 2015
Page 3
3.2 Protection of Groundwater Monitoring Well:
In accordance with Riverside County Environmental Health Department guidelines EnGEN
Corporation has placed a monitoring pipe in the exploratory backhoe pit. It is the responsibility of
the client, property owner or client/owner's representative to insure that the monitoring well is
protected in the event that the Health Department should select the site for random well inspection
prior to approval of this report. Upon completion of field percolation testing EnGEN Corporation
is no longer responsible for the protection of the groundwater monitoring well.
t3.3 Percolation Testing:
The percolation test areas were verified as being in undisturbed natural earth materials. A total of
seven (7) percolation test pits were excavated in the bottom of shallow backhoe pits and three
percolation test pits were drilled using an 8-inch diameter hand-held power auger to a depth of 3-
feet below existing ground surface and tested within the anticipated leach field and 100%expansion
areas on the subject site. The test pits were pre-soaked and tested in general accordance with the
procedures outlined in Chapter 3 of the "Onsite Wastewater Treatment Systems, Technical
Guidance Manual" (Version A), publication issued by the Riverside County Department of
Environmental Health. During the initial testing some of the percolation rates qualified for the Sandy
Soil Criteria Test when the water in the test hole drained more than 5-inches within a 25 minute
time interval. Thus time intervals of 10-minutes were used for these test locations. One test in 7
failed the pre-soak and is considered an anomaly. The soil conditions within the proposed leach
line depth are interbedded deposits of silty sand and sand/silt/clay mixtures. Care should be taken
to insure that the bottom of the proposed leach lines are not terminated in the clayey soil lenses
and should be excavated into the silty sand soil zone to insure that the percolation rate represented
in this report are achieved. The percolation test results are presented in the Appendix of this report.
3.4 Earth Materials:
The earth materials encountered within the exploratory pits excavated in the proposed leach field
and expansion areas on the subject parcel consists of coarse to fine sand with interbedded deposits
of silt and clay, (SM) from surface elevations to the maximum depth explored of 15 feet. For a
more detailed description of material types encountered in the exploratory excavations, refer to the
Exploratory Backhoe Pit Log presented in the Appendix. Refusal was not encountered in the areas
t
explored for the leach line system. The earth material strata as shown on the Exploratory Backhoe
Pit Log represents the conditions encountered in the actual backhoe pit location at the time of our
field study, and other variations may occur throughout the subject property. Lines of demarcation
on the log represent the approximate boundary between the material types, but the actual transition
may be gradual.
EnGEN Corporation
Platts Residence
Project Number:4166P
May 2015
Page 4
3.5 Groundwater:
There was no groundwater encountered in the exploratory test pit (TP-1, see Plate 1) on the day
excavation was made, or 24 hours after when checked by a representative of this firm. There was
no mottling or other evidence of historical high groundwater conditions encountered within the
exploratory backhoe pit to the total depth explored (15-feet bgs) at the time the subsurface
exploration was performed for this study. It is the opinion of this firm that groundwater is not likely
to rise above the current level.
4.0 PRELIMINARY SYSTEM DESIGN RECOMMENDATIONS
4.1 Design Criteria:
Table-I (Percolation Test Results& Rates) indicates the recommended square foot per 100 gallon
of septic tank capacity rate for the subject site based on field test results within the areas tested for
this report. Additional testing may be required should an area other than that represented in this
report be proposed for the leach field site.
Table—I Percolation Test Result& Rates
Location
Rate Depth Overburden Minimum Soil Cover(ft.)
s .ft./10o Gal. in Feet Factor
See Plate 1 1 55 3.0 1.0 1 2.0
The design rate assigned includes a safety factor to accommodate any soils variations that may
not have been exposed in the field investigation. The sewage disposal field should be designed
and constructed in accordance with Chapter 5 of the "Onsite Wastewater Treatment Systems,
Technical Guidance Manual' (Version A) publication issued by the Riverside County Department
of Environmental Health. Leach lines should be installed in natural, undisturbed soils in the
general vicinity of the percolation test locations and the 100 percent expansion area should be
planned for in the same area. Final leach field location must conform to the 100-foot separation
from any water well location. Leach lines shall not be located under driveways. In addition, leach
lines shall be separated from the edge of pavement by at least 3-feet. The determination for any
additional testing should be made by the Riverside County Department of Environmental Health
and/or the Project Engineer.
4.2 Expansion Area:
An area equivalent in size to the calculated primary disposal area is required to be reserved for
possible future system expansion. Allowance should be made in locating both the primary disposal
area and the 100 percent expansion area on the site to accommodate any future requirements.
The 100 percent expansion area shall also be located in the area of acceptable test results.
EnGEN Corporation
Platts Residence
Project Number: 4166P
May 2015
Page 5
4.3 Gravity Flow:
The proposed structures should be located so that a gravity flow condition exists to the primary
sewage disposal system and the future expansion area, unless otherwise approved by the
Riverside County Department of Environmental Health.
4.4 Grading On Sewage Disposal Area:
The leach line inlets should be located in natural, undisturbed soil at the recommended total depth.
No grading should be performed in the proposed sewage disposal area.
6.0 GUIDELINES FOR SEWAGE DISPOSAL SYSTEM USE
6.1 General:
The following suggestions are reproduced from the "Homeowners and Users Guide for On-Site
Wastewater Disposal Systems." They are intended to increase the useful life of the disposal
system. Their applicability and effectiveness will vary with each project.
5.2 Minimize the Liquid Load:
The less wastewater produced, the less wastewater there will be to dispose. The following
suggestions will help to reduce the liquid load:
0 Repair leaky fixtures. Check toilets by dropping food dye in the tank and see if it
shows in the bowl without flushing.
0 Wash clothes only when there is a full load. Avoid doing several loads in one day.
Take short showers instead of baths. Do not turn the shower on all the way, and turn
the water off while lathering.
Use a water-saving device in the toilet tanks and do not flush unnecessarily.
Do not let water run while washing hands, teeth, dishes, vegetables, etc. Use a
stoppered basin.
Provide adequate drainage around the disposal area to divert runoff from higher
ground. Many other ways of conserving water exist. Be alert for other water-saving
ideas.
5.3 Minimize the Solids Load:
A good rule is to not use the septic system for anything that can be disposed of some other way.
The less material that is put into the septic tank, the less often it will need pumping.
Avoid using a garbage disposal unit. Compost scraps or throw them out with the
trash.
0 Collect grease in a container near the sink rather than pouring it down the drain.
Minimize the discharge of paper products. Non-degradable items, such as
disposable diapers, sanitary napkins, facial tissues, and paper towels are especially
harmful. Do not throw cigarette butts down the toilet.
Only three (3) things should go into the septic tank: human waste, toilet paper, and
EnGEN Corporation
Platte Residence
Project Number: 4166P
May 2015
Page 6
water from toilets, bathing fixtures, laundry and kitchen sinks.
Ordinary use of household chemicals will not hurt the bacteria in the sewage
disposal system but do not use excessive amounts. Also, do not use the system to
dispose of oils, paint thinner, or other hazardous liquids.
5.4 Septic Tank Additives:
Chemicals, bacteria, enzymes, etc. may not help solids break down in the septic tank and should
not be expected to reduce the need for pumping.
5.5 Vehicle Traffic:
Underground pipes and soil porosity can be damaged by driving vehicles over the area repeatedly.
Never drive over the disposal area. This area should only be walked on so as to attend the planted
vegetation. Vegetation over the disposal system area may not need to be irrigated.
5.6 If the System Fails:
If the system has failed, provisions should have been made for supplementing the primary disposal
system with a new one of equal or greater size. A qualified person should design all failed system
repairs. Leach line systems should be replaced with a system of equal or greater size constructed
in the general vicinity of the original disposal system with their inlet lines in parallel so that each
unit is loaded simultaneously.
6.0 CONCLUSIONS
6.1 Sufficient Area Statement:
Based on the data presented in this report and using the recommendations set forth, it is the
judgment of this professional that there is sufficient area on the parcel in question to support a
primary and expansion OWTS that will meet the current standards of the Department of
Environmental Health and the Regional Water Quality Control Board (RWQCB).
6.2 Natural Ground Statement:
The designed system shall be located in natural undisturbed soil at the depth of the tests performed.
6.3 Soil Particle Size Statement:
The natural occurring body of minerals and organic matter at the proposed wastewater disposal
area contains earthen material having more than 50% of its volume composed of particles smaller
than 0.08 inches (2mm) in size.
6.4 Groundwater:
Based on the data presented in this report and the testing information accumulated, it is the
judgment of this professional that the groundwater table will not encroach within the current
allowable limit set forth by County and State requirements.
1
EnGEN Corporation
Platte Residence
Project Number:4166P
May 2015
Page 7
7.0 CLOSURE
This report has been prepared for use by the parties or project named or described in this
document. It may or may not contain sufficient information for other parties or purposes. In the
event that changes in the assumed nature, design, or location of the proposed structure and/or
project as described in this report are planned, the conclusions and recommendations contained
in this report will not be considered valid unless the changes are reviewed and the conclusions and
recommendations of this report modified or verified in writing. This study was conducted in general
accordance with the applicable standards of the Geotechnical Engineering profession and
accepted sewage disposal system testing and design principles and practices at the time this report
t was prepared. No other warranty, implied or expressed beyond the representations of this report,
is made. Although every effort has been made to obtain information regarding the subsurface
conditions of the site, limitations exist with respect to the knowledge of unknown regional or
localized off-site conditions which may have an impact on the parcels. The recommendations
presented in this report are valid as of the date of this report. However, changes in the conditions
1 of a property can occur with the passage of time, whether they are due to natural processes or to
the works of man on this and/or adjacent properties. If conditions are observed or information
becomes available during the design and construction process that are not reflected in this report,
EnGEN Corporation should be notified so that supplemental evaluations can be performed and
the conclusions and recommendations presented in this report can be modified or verified in writing.
In addition, changes in applicable or appropriate standards of care or practice occur, whether they
result from legislation or the broadening of knowledge and experience. Accordingly, the
conclusions and recommendations presented in this report may be invalidated, wholly or in part,
by changes outside of our control which occur in the future.
Thank you for the opportunity to provide our services. Please direct any questions you may have regarding this
report to this office at your convenience.
Respectfully submitted,
EnGEN Corporation
ay a dge, ring b sbjorn tene, P ci
REPA 72 9, Proj anager GE: 162 roject GeotechnicalLEngineer
HWB:OB:pm
Q OFESSIONq
Distribution: (2)Addressee oPN eRgr F24ioy0FymCZ
No. 162 A
a c
q OFCALIf
EnGEN Corporation
Platts Residence
Project Number: 4166P
May 2015
Appendix
Appendix 1 - Percolation Test Results & Grain Size Analysis
1
1
1
1
EnGEN Corporation
1
PERCOLATION TEST RESULTS
EnGEN Corporation Project Number: 4166P
955-050-011
Percolation Test No. 1 Date of Test: 5/5/2015
Time D-Time D1 D2 D2- D1 R-Value SF/100
Military Time In Minutes In Feet In Inches Min/Inch Gallons
6.00
6.70 30.00 2.45 2.63 2.16 13.89 35
7.00 30.00 2.45 2.59 1.68 17.86 40
7.70 30.00 2.45 2.58 1.56 19.23 45
8.00 30.00 2.45 2.57 1.44 20.83 50
8.70 30.00 2.45 2.57 1.44 20.83 50
9.00 30.00 2.45 2.57 1.44 20.83 50
9.70 30.00 2.45 2.57 1.44 20.83 50
10.00 30.00 2.45 2.56 1.32 22.73 50
10.70 30.00 2.45 2.56 1.32 22.73 50
11.00 30.00 2.45 2.56 1.32 22.73 50
11.70 30.00 2.45 2.56 1.32 22.73 50
12.00 30.00 2.45 2.56 1.32 22.73 50
SLOPE ACROSS SITE IS: 4% TEST PIT DEPTH IS: 3.45 Feet
MINIMUM PIT DEPTH IN FT. 3.00 MINIMUM COVER: 1.00 Foot
PERCOLATION TEST RESULTS
955-050-011
Percolation Test No. 2 Date of Test: 5/5/2015
Time D-Time D1 D2 D2- D1 R-Value SF/100
Military Time In Minutes In Feet In Inches Min/Inch Gallons
6.03
6.73 30.00 2.65 2.80 1.8 16.67 40
7.03 30.00 2.65 2.77 1.44 20.83 50
7.73 30.00 2.65 2.77 1.44 20.83 50
8.03 30.00 2.65 2.76 1.32 22.73 50
8.73 30.00 2.65 2.76 1.32 22.73 50
9.03 30.00 2.65 2.75 1.2 25.00 55
9.73 30.00 2.65 2.75 1.2 25.00 55
10.03 30.00 2.65 2.75 1.2 25.00 55
10.73 30.00 2.65 2.75 1.2 25.00 55
11.03 30.00 2.65 2.75 1.2 25.00 55
11.73 30.00 2.65 2.75 1.2 25.00 55
12.03 30.00 2.65 2.75 1.2 25.00 55
SLOPE ACROSS SITE IS: 4% TEST PIT DEPTH IS: 3.65 Feet
MINIMUM PIT DEPTH IN FT. 3.00 MINIMUM COVER: 1.00 Foot
EnGEN Corporation
1
PERCOLATION TEST RESULTS
EnGEN Corporation Project Number 4166P
955-050-011
Percolation Test No. 3 Date of Test: 5/5/2015
Time D-Time D1 D2 D2 - D1 R-Value SF/100
Milita Time In Minutes In Feet In Inches Min/Inch Gallons
8.30
9.00 30.00 2.86 3.53 8.04 3.73 20
9.30 30.00 2.86 3.47 7.32 4.10 20
10.00 30.00 2.86 3.47 7.32 4.10 20
10.30 10.00 2.86 3.19 3.96 2.53 20
11.00 10.00 2.86 3.16 3.6 2.78 20
11.30 10.00 2.86 3.11 3 3.33 20
12.00 10.00 2.86 3.05 2.28 4.39 20
12.30 10.00 2.86 3.01 1.8 5.56 20
13.00 10.00 2.86 3.01 1.8 5.56 20
13.30 10.00 2.86 2.98 1.44 6.94 20
14.00 10.00 2.86 2.98 1.44 6.94 20
14.30 10.00 2.86 2.98 1.44 6.94 20
SLOPE ACROSS SITE IS: 4% TEST PIT DEPTH IS: 3.86 Feet
MINIMUM PIT DEPTH IN FT. 3.00 IMINIMUM COVER: 1.00 Foot
PERCOLATION TEST RESULTS
955-050-011
Percolation Test No. 4 Date of Test: 5/5/2015
FAILED PREASOAK
SLOPE ACROSS SITE IS: ITEST PIT DEPTH IS: 3.46 Feet
MINIMUM PIT DEPTH IN FT. 3.00 IMINIMUM COVER: 1.00 Foot
1
EuGEN Corporation
1
1
PERCOLATION TEST RESULTS
Et7GEN Corporation Project Number 4166P
955-050-011
Percolation Test No. 5 Date of Test: 5/5/2015
Time D-Time D1 D2 D2 - 01 R-Value SF/100
Military Time In Minutes In Feet In Inches Min/Inch Gallons
11.00
11.70 10.00 6.50 7.05 6.6 1.52 20
12.00 10.00 6.50 7.00 6 1.67 20
12.70 10.00 6.50 6.90 4.8 2.08 20
13.00 10.00 6.50 6.50 0 DIV/O! #DIV/0!
13.70 10.00 6.50 6.50 0 DIV/01. #DIV/01
14.00 10.00 6.50 6.50 0 DIV/01 #DIV/O!
14.70 10.00 6.50 6.50 0 DIV/01 #DIV/01
15.00 10.00 6.50 6.50 0 DIV/01 #DIV/O!
15.70 10.00 6.50 6.50 0 DIV/O! #DIV/O!
16.00 10.00 6.50 6.50 0 DIV/01 #DIV/O!
16.70 10.00 6.50 6.50 0 DIV/O! #DIV/01
17.00 10.00 6.50 6.50 0 DIV/O! #DIV/01
SLOPE ACROSS SITE IS: TEST PIT DEPTH IS: Feet
MINIMUM PIT DEPTH IN FT. IMINIMUM COVER: Foot
PERCOLATION TEST RESULTS
955-050-011
Percolation Test No. 6 Date of Test: 5/5/2015
Time D-Time D1 D2 D2 - D1 R-Value SF/100
Milita Time In Minutes In Feet In Inches Min/Inch (Gallons)
8.30
9.00 30.00 2.55 2.92 4.44 6.76 20
9.30 30.00 2.55 2.82 3.24 9.26 20
10.00 30.00 2.55 2.80 3 10.00 25
10.30 30.00 2.55 2.79 2.88 10.42 25
11.00 30.00 2.55 2.77 2.64 11.36 25
11.30 30.00 2.55 2.74 2.28 13.16 30
12.00 30.00 2.55 2.74 2.28 13.16 30
12.30 30.00 2.55 2.74 2.28 13.16 30
13.00 30.00 2.55 2.74 2.28 13.16 30
13.30 30.00 2.55 2.74 2.28 13.16 30
14.00 30.00 2.55 2.74 2.28 13.16 30
14.30 30.00 2.55 2.74 2.28 13.16 30
SLOPE ACROSS SITE IS. 4O TEST PIT DEPTH IS: 3.55 Feet
MINIMUM PIT DEPTH IN FT. 3.00 IMINIMUMCOVER. 1.00 Foot
EnGEN Corporation
1
PERCOLATION TEST RESULTS
EnGEN Corporation Project Number 4166P
955-050-011
Percolation Test No. 7 Date of Test: 5/5/2015
Time D-Time D1 D2 D2 - D1 R-Value SF/100
Milita Time In Minutes In Feet In Inches Min/Inch Gallons
8.30
9.00 30.00 2.06 2.28 2.64 11.36 25
9.30 30.00 2.06 2.19 1.56 19.23 45
10.00 30.00 2.06 2.20 1.68 17.86 40
10.30 30.00 2.06 2.18 1.44 20.83 50
11.00 30.00 2.06 2.16 1.2 25.00 55
11.30 30.00 2.06 2.16 1.2 25.00 55
12.00 30.00 2.06 2.16 1.2 25.00 55
12.30 30.00 2.06 2.16 1.2 25.00 55
13.00 30.00 2.06 2.16 1.2 25.00 55
13.30 30.00 206 2.16 1.2 25.00 55
14.00 30.00 2.06 2.16 1.2 25.00 55
14.30 1 30.00 1 2.06 2.16 1 1.2 1 25.00 1 55
SLOPE ACROSS SITE IS: 4% ITEST PIT DEPTH IS: 3.06 Feet
MINIMUM PIT DEPTH IN FT. 3.00 IMINIMUM COVER: 1.00 Foot
PERCOLATION TEST RESULTS
955-050-011
Percolation Test No. 8 Date of Test: 5/5/2015
Time D-Time D1 D2 D2 - D1 R-Value SF/100
Military Time In Minutes In Feet In Inches Min/Inch Gallons
8.30
9.00 30.00 2.33 2.94 7.32 4.10 20
9.30 30.00 2.33 2.82 5.88 5.10 20
10.00 30.00 2.33 2.78 5A 5.56 20
10.30 30.00 2.33 2.73 4.8 6.25 20
11.00 30.00 2.33 2.71 4.56 6.58 20
11.30 30.00 2.33 2.71 4.56 6.58 20
12.00 30.00 2.33 2.71 4.56 6.58 20
12.30 30.00 2.33 2.71 4.56 6.58 20
13.00 30.00 2.33 2.71 4.56 6.58 20
13.30 30.00 2.33 2.71 4.56 6.58 20
14.00 30.00 2.33 2.71 4.56 6.58 20
14.30 30.00 1 2.33 2.71 1 4.56 1 6.58 1 20
SLOPE ACROSS SITE IS: 4% ITEST PIT DEPTH IS: 3.33 Feet
MINIMUM PIT DEPTH IN FT. 3.00 IMINIMUM COVER: 1.00 Foot
EnGEN Corporation
Platte Residence
Project Number: 4166P
May 2015
Appendix
Appendix 2 - Exploratory Backhoe Log
1
1
1
EnGEN Corporation
1
1
EXPLORATORY TEST PIT LOG SUMMARY
Project Number: 4166GFS Project: Platts Residence
Test Pit No.: 1 Surface Elevation: 1238.5
Date: 4/29/15 Logged By: HWB
Location: See Plate 1
an Sam Dry %In-Situ Maximum %Optimum
5 Soil ple Relative
Description E USCS Density Moisture Density Moisture
d Graphic N
Depth Compaction (per Content (pcf)Content
w
1238.5
T
ul
Coarse to fine sand with silt and
0
SM
trace clay,dry, loose,tan.
1.25
1235.8 79.5 101.1 1.3 127.1 10.1
Slightly moist, mediumi diii : i
Coarse to fine sand with some silt 2.5
moist,medium dense, tan. SMis
Intermittent deposits of silts and v ML
clays,varies in thickness between
3.75
SC
ili : :I: i 1/ xxl 86.8 110.4 3.5 127.1 10.1
f l
6-InGI GIIV i%4-;"dh iayCN.
SM
deposits).
Clayey sand,med.dense,tan. 5
I:?
da Thin sill e s 1/2-inch.
Coarse too fine sand with silt,moist,
medium dense,tan.
6.25
7.5
1230 Coarse to fine sand with silt,moist, 8.75
SM
dense,dark brown(possible
sandstone bedrock unit).
i:ii i!i f i
Note 10Surfacesoilsappeartobeofcolluval
or alluvial origin with interbedded
deposits of sand,sand/silt/clay
mixtures.Loose in the upper foot or 1 t 25
so,then med.dense @ 2-3 feet.
From 3 feet material is med.dense
I to Acnec rn mw. iunrh.
13.75
t
1223.5 BOTTOM OF EXCAVATION AT 15- 15
FEET. NO GROUNDWATER
ENCOUNTERED,OR CONDITIONS
OBSERVED THAT WOULD 16.25
INDICATE HISTORICAL HIGH
GROUNDWATER CONDITIONS
ABOVE 15-FOOT LEVEL.
17.5
Notes:
EnGEN Corporation
1
1
1
EXPLORATORY TEST PIT LOG SUMMARY
Project Number: 4166GFS Project: Platts Residence
Test Pit No.: 2 Surface Elevation: 1242.5
Date: 4/29115 Logged By: HWB
Location: SEE PLATE 1
c
u
Dry %In-Situ Maximum %OptimumaSoilnSampleRelativeDescriptionEUSCSDensityMoistureDensityMoisture
m Graphic w Depth Compaction ( enConttw poll Content
1242.5 Coarse to fine sand with silt and
0
SM
trace clay,dry, loose,tan,
0.5
1 1
1241 -:+- - i4'Thin deposit(1/2-inch or less)of 1.5 Sc
clayey sand. SM
2 SM 81.9 104.1 1.6 127.2 10.1
1240.3 -. . {t-r. Thin layer sand/silt mixture. MIL
I Coarse to fine sand with silt and Sc
trace clay,dry loose,tan. 2.5 SM
1249 ?L i 3 ML
11: : Coarse to fine sand with silt and SC
trace clay,moist, medium dense. ML
3.5 SM
1238.5 :i aal:: 4 SM 86.3 109.7 2.4 127.2 10.1
4.5
1
5
5.5
1
1236.5 ' BOTTOM OF EXCAVATION,NO 6
GROUNDWATER ENCOUNTERED,
NO INDICATIONS OF HIGH
GROUNDWATER CONDITIONS 6.5
OBSERVED.
7
Notes: The sand/silt/clay deposits are essentially horizontal with distinct layering between them.
EnGEN Corporation
1
I
1
EXPLORATORY TEST PIT LOG SUMMARY
Project Number: 4166GFS Project: Plaits Residence
Test Pit No.: 3 Surface Elevation: 1244.5
I Date: 4/29/15 Logged By: HWB
Location: SEE PLATE 1
o
Soil n Sample Relative Dry %In-Situ Maximum %Optimum
uex,lyii n E USCS uensiiy moisture uensry ivioiscure
u Graphic y Depth Compedion (
per Content (per)Contentw
1244.5 . . . Coarse to ine sand with silt and
0
SM
trace clay,dry, loose,tan.
0.5
I a i 1
1 5
1242,5 2 SM 792 100.7 2.2 127.2 10.1
1242.3 Interbedded(1"-4')sand/silBclay. ML
Thin deposit clayey sand.
I
SC
bi i ai Coarse to fine sand with silt,and 2.5 SM
I
i trace clay,dry loose,tan. m
411LL1:
1241.6 :;::_:::::::: Thin layer(3")of clean sand. 3 SW
Silt deposit(1") ML
t Coarse to fine sand with silt and SM
trace clay, moist, medium dense, Sc
tan. 3.5 ML
12405 :- 4 SM 85.0 108.1 2A 1272 10.1
4.51
5
5.5
1238.5 BOTTOM OF EXCAVATION, NO 6
GROUNDWATER ENCOUNTERED,
NO INDICATIONS OF HIGH
GROUNDWATER CONDITIONS 6.5
OBSERVED.
1 7
Notes:
EnGEN Corporation
Platts Residence
Project Number: 4166P
May 2015
Appendix
Plate I
1
1
1
1
1 EnGEN Corporation
PLATE 1
I I
1 I
I
Ke"/'
col is Road
a'
o ae Traa Re.
a
pq°MIN. RESIDENCE
i p.6 / FF •fyla. P
S
Tp- [
b12A2.0 PAD
8p
aJba ROaD m
Subjeet Site
i
b0-6r
y
i•
11 LB aRoetl m
i
5K
Taat Al 4 Failed
II 5{ Praaoak
I V 2.60rAC_GROSS 1
I'
I
P-2 \
2.4 AC NET i I `\\\%
III \\% r ----J, I \
It
N.
IN
1 1
I`
1
II III\ ` I\ \
Scale 1"= 80'
I
LEGEND 1 \ \ \ ,
J 'Ili II i I i \\\ I\ I
LLJ =Approximate Location of Exploratory Backhoe Pit
Approximate Location of Percolation Test Pit
PERCOLATION TEST REPORT SITE PLAN
PROJEcr NAME: Platts Property DATE: May 2015
PROJECT NUMBER: 4166P CLIENT: Dr. & Mrs. John Platts
41625 Enterprise Circle South,B-2•Temecula,California 92590. 951.296.3511 Fax: 951.296-3711 • www.engencorp.com Legal Description: APN: 955-050-011 Plate No. 1