HomeMy WebLinkAboutTract Map 3883 Lot 194 Sewage Disposal Feasibility & Percolation Test
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SEWAGE DISPOSAL FEASIBILITY REPORT
AND
PERCOLATION TEST
FOR
LOT 194 OF TRACT 3883
(MAP BOOK 63, PAGES 1-35, RECORDS OF RIVERSIDE COUNTY)
A. P. N. 919-122-003
PREPARED FOR:
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CRAIG PINTER
25455 KNOLLWOOD
(714) 677-5840
PREPARED BY:
NORTHSTAR ENGINEERING, INC.
27715 JEFFERSON AVE. #117
TEMECULA, CA 92390
(714) 676-7827
MAY 15, 1988
JOB NO. 219.01S
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LOCATION AND SITE DESCRIPTION
Location
The subject property is located in the northerly portion of
Rancho california approximately 5 miles northeasterly of
Temecu1a, in Riverside County. Access to the site is via via
Norte, which fronts the northwesterly portion of the site. The
most westerly corner of the site is approximatelY 200 feet from
the intersection of paseo Del Cie1o.
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site Description
The subject property is in the peninsular Range Province of
southern California. Elevations range between approximately 1175
feet and 1200 feet. vegetation on the site consists of natural
grasses. No wells, neighboring wells, rock outcroppings~
outbuildings or other features which would be detrimental were
noted.
PROPOSED DEVELOPMENT
The map on page 6 indicates
Iparcel of 0.74 acres net.
:dwelling on the property is
that the subject
The construction
anticipated.
property is a single
of a single family
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FIELD INVESTIGATION
On April 13, 1988 one soil test pit was dug with a backhoe
capable of digging to an depth of 15 feet; the location was
selected with regard to the probable pad location shown by the
owner on site, topography and probable location of leach field.
This location is marked "T1" on the map at page 6. The soils
encountered were examined and visually classified in the field.
Logs of the soil classification and description are shown on page
7 for the soil test pit. The stratification lines shown on these
logs represent the approximate boundaries between soil types; the
actual transitions maybe gradual.
On the same date two shallow test pits were dug approximately 4
feet below the surface with the backhoe in the general location
of the soil test pit. The locations of these test pits are
marked "TP#l" and "TP#2" on the map on page 6. The test pit
holes were presoaked 24 hours prior to testing.
On April 14, 1988, percolation tests were performed. Each hole
in a test pit was filled with approximately 18 inches of water
and a measurement was taken of the depth of the water surface.
Every 30 minutes the depth to the water surface was measured. If
necessary the hole was refilled with water to an approximate
<;iepth of 18" and the time of remeasurement noted. The log of the
percolation test results for each of the test pits is shown on
page 8.
SOIL AND GEOLOGIC CONDITIONS
Bedrock materials underlying most
and associa~ed igneous metamorphic
the Southern California Batholith.
of the property are granitic
and metasedimentary rocks of
So~l materials encountered in this test derived from the
weathering and erosion of the surrounding bedrock and consisted
of generally fine to coarse grained clayey sand and sandy clay
materials. Soil materials were encountered to the 15 foot
depth. Finer grained silty clay and clayey silt residual surface
soils have locally developed from the silty sands.
soil materials
of weathered
alluvial (Qal)
have been mapped as
bedrock (map symbol
materials.
undifferentiated assemblages
Wbr), slope wash (Qsw), and
Groundwater was not encountered within any of the subsurface
,excavations.
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RECOMMENDATIONS
Percolation t.est results show a range in Rmax values (maximum
percolation rate)of 16.94 to 27.35 minutes per inch. This range
of percolation rates is due to the isolated nature of the test
-and to the variations in soil types.
Use of shallow onsite
feasible. Acceptable
eac>. of the Test pits.
sewage disposal system is geotechnically
percolation results were established by
The-subject property shall be
rate of 28 minutes per inch
designed leach area, shown
corresponding leach area of
septic tank capacity.
assigned a preliminary percolating
(the least of Rmax values in the
on the map on page 6) with a
65 square feet per 100 gallons of
If more than two feet of soil is removed from the area of Test
Pit'#1 or Test pit #2, additional testing may be required.
At least a 1200 gallon septic tank will be required. The minimum
bottom area of the leach field will be 780 square feet. At least
. 260..lineal feet of 36" trench will be required, with 3 lines,
each 87' in length, in a 36" trench with 1 foot of rock beneath
the drain lines. Leach lines shall be at least 10 feet from any
building.
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CONCLUSIONS
The subject.. property has sufficient area based on the established
rate for an initial and 100% expansion system, taking into
account the following:
Any proposed dwelling shall be located so that the
initial subsurface sewage disposal system and the
requi.red 100% expansion system shall be by gravity
flow.
The original tile line
required expansion area
undisturbed soil at the
shall be installed and all the
shall be located in natural,
depth of the tests performed.
cons.1.deration must
pools, patios, and
encroach upon the
or animal pens, if
over leach lines.
must not be placed
be given to dwelling size, swimming
other impervious areas so as to not
sewage disposal area. Horse corrals
contemplated, must not be placed
Driveways, either paved or unpaved
over leach lines.
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Based upon data presented in this report and using the
recommendations set forth herein, it is the judgment of this
engineer that there is sufficient area within the subject
property to support an individual sewage disposal system that
wtll meet the current codes and standards of the Riverside County
Health Department.
Based upon the data presented in this report and the testing
information accumulated, it is the judgment of this engineer that
the groundwater table will not encroach within the current
allowable limit set forth by County and state requirements.
since our investigation is based upon the site materials observed
in the test pits and on the percolation test results, the
recommendations and conclusions are professional opinions,
using methods meeting the standard practices at this time. This
report is based on conditions existing at the time of the
investigation. Any environmental changes, whether natural or
manmade, may alter or negate the conclusions and/or
recommendations contained herein. No warranty is made or implied
by the submittal of this report nor by any oral or written
agreement. Any liability in connection herewith is limited to
the fee charged for this report.
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Hec or L. torrea RCE 36306
License expires 6/30/88
Northstar Engineering, Inc.
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. SHEET _ OF _ !JNEETS
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FIELD
LOG NO.
'2
oI0BNO. 2 \9. 0 \ '5 DATE 4 - \ '3 - 88 CLEYATION
PffOJE'CT p;".fe.,.- LOCATION Lot 194 - MEOdcwvic\^./
L()(}GEO, BY -u,VB
ASSISTANT
TIllE
DRILLiNG CO. <Shof'e,.-
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z I ~ REMARKS
;lc.~l! '"-'?# MATERIAL DESCRIPTION
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t;ROlJND WATER LEVEL
HOLE DIA.
AFTE:R
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EXCAVAnON METHOD
GROUNDi WATER LEVEL
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NORTHSTAR ENGINEERING, me.
.0VlL ENGJNI!EM'IG II tANP 5U1VIIYING
;2771~ JeJfenol1 MCll1I<.' /17
'Temecula, CA 92~90
(714) 676-7827
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i ,!~;~t!~~:j~r ? SANOY SDI;A::;:AVATED
I PRESo.AK 4. I'?' 85
I- SANDY TRIAL
i So.lL
; CRITERIA
i TEST
i 2
I :m:m:mHmHm:::m:mmmm:mm:mm:m:mm:m:mmH] USE NORMAL / SANOY So.IL CRITERIA
,NO. TIME READING NO. TIME READING NO.
,'.5:> 4.!>D ,o'AD 4.?Eo
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NORTH STAR ENGINEERING
SHEET
OF
p,,,\-,,,,
Lot-
JOB NO.
DATA
219.01 S
PERCOLATION
PROJECT
TEST FIELD
4- l,?-BS
DEPTH
A~
PERC TEST BY
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DATE
DATE
TIME
A TIME
BEGINNING
WATER LEVEL
FINAL
WATER LEVEL A WATER LEVEL
SL(}PE:
TIME
t>'
READING
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Ii 4
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9
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DESIGN RIITE
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MIN/lNCH I
MINIMUM IIREA REQUIRW
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~ )\m\rj~~i\~F 4 DATE EXCAVATED 4- \'?- 8';'~ DEPTH -:,1-
~ SOIL CLASS SANOY SOIL TEST BY DATE
PfiESOAK 4. I"?- B5 PERC TEST BY CHAD DATE
I TRIAl. READING A TIME BEGINNING FINAL A Ki'lTEIi' LEVEL
\ SANOY WATER LEVEL WATEIi' LEVEL
So.IL \
CRITERIA
TEST '2
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m~m~mmmmmm~mmmmmmmmmmm\j1jlll~j\j\~\iW USE No.RMAL/SANDY SOIL CRITERIA SLOPE:
... .......
NO. TIME READIMJ NO. TIME READING NO. TIME Rf:ADING
\ 1 : :::.1 3.14 5 I'" ?B ':!>,O, 9
5: "'>0::, 3.31 1\:'2, '3.~1
2 /;:41 ~.2? 6 II: 21 ~.~l \0
9:1'" 3,"'1 1'2:00 3.4'2-
3 q:I"; 3.llP 1 ;-::7: 03 "0.'32 \ I
"1'. So ??2 1'2' ::>'1 3.43
4 9',"0>3 '3>. 10 8 12
10 ''?Uo 3.3\
DESIGN RIITE
10.94
MTN/lNCH I
MINIMUM AREA REQUIReD
. I 40 rl2/loo C"1l0n'/Dn~
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