HomeMy WebLinkAboutCT 73-40; ROYAL PALMS; ENVIORNMENTAL IMPACT REPORT; 1973-06-03,.
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ENVIRONMENTAL
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REPORT
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R.ICK ,ENGINEERING COMPANY',
S'an Diego California , ,
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, TABLE OF CONTENTS
The Environmental Impact of the Proposed Action
1 • Project Description
2 • Environmental Setting Without the ~roject
3.
(a) Topography
(b) Land Use
'(c) , Biology
(d) Geology
,(e) Archeology
Environmental Impacts
(a)
(b)
(c)
(d)
(e)
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Land Use
Grading
, Biology
Archeology
Drainage -Water Quality
Traffic
(g) Noise
, "(h) ," Air Quality
(i) Utilities
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(j)' Community Services
(k) Visual
(1) Socio-Economic Setting,
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, ,B'" ,,' Apy Adverse Environmental Effects Which Cannot Be, '
Avoided Should the Proposal Be Implemented
C. , Mitigation Measures Proposed to Minimize the Imp;;ict
, P. Alternatives to "the Proposed Action
E. The Relationship Between Local Sp.ort-Term Uses of
'Manis Environment and the Maintenance and "
Enhancement of Long-Term Environmental Productivity
F, "Any Irreversible Environmental Changes \!\Thich Would
Be Involved in the Proposed Action Should It Be Implemented
G. The Growth Inducing Impacts of the Proposed Activity Upon
the, Neighborhood and/or Community
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H. The Boundaries of·the Area VlThich May Be Significantly
Affected by the Proposed Activity ,
I •. ' Certification of Accuracy and Qualifications of
Individuals Preparing Draft Environmental Impact
Report .
r . List of all Agencies I Organizations I or Individuals
. Consulted
Appendix A -Plot Plan
. Appendix .B -Soils Report
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A. THE ENVIRONMENTAL IMPACT OF THE PROPOSED ACTION
.1. 'Project Description
The proposed project I Royal P,alms I involves the construction
of 62 apartment units in the City of Carlsbad. The 1.66 acre sHe is
,bounded on the west by Ocean Street, on the south by: Oak Avenue and'
--On the north byBlm Avenue (see map I page 2).
'-'The purpose of the proposed project is to ultimately provide, 62,
, . -~"apari:ment units for families in the City of Carlsbad" ' The, proposed
_ ,',; project will have the effect of increasing the area's popula~ion by an. . . . . . -'
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'-estimated 180 people.
.:' Housing shortages I population growth and increased land values
indicate that development of the subject property should be commenced
" '-,at this time rather than at a future time.
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. :The existing zoning under Title 21, City of Carlsbad zoning " -
':' -~"brdinance is R-3. The proposed use of. this property is in conformance" , , ,
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'. , -:with the City of Carlsbad General Plan Amendment to the Land Use Element "
',N~~ I-and the existing zoning.
I ---: :'-_ --? ----Royal Palms is located within walking (Hsta~ce of tlie ocea~. _ The
-:-_ ~t!::ee-story apartment buildings will be constructed -over a subterranean
}-, i ' parking area. Elevators will provide access to all floors. The building
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j , 'will not exceed the 35 foot height limit,ation of an R-'S zone (see plot plan "
-in appendL"{).
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-, 'The 62 apartment units will be divided between I, 2, and 3 bedroom
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units. All units will be of wood frame construction., -Precise construction
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met~ods cannot be specified at this stage of planning. Onl}T minimal.
regrading of the site will be required as the site was previously graded
. for c.onstruction of the existing swimm~ng pool. .A new swimming pool'
and recreation building will be constructed in conjunction with the project.
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The project site will be landscaped by the developer and maintained by',' .
the owner.
. Access to the site will be from Elm Avenue and Oak Avenue. ',Drive..., .
ways win connect the parking areas to the streets; no internal streets ·are
-rE~quj,ted. Two parking spaces per unit will be ,provided in accordance
with the Carlsbad Zoning Ordinance. All parking is to be located beneath
the apartment units.
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Utility services are currently available in Elm Avenue t Oak Avenue .,.; .~
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"-peoBL., 1 . Ocean Street, and Carlsbad Boulevard'. Ampl~ capacity is av~ilable t"o
'? '?: 1 " serve the new apartment units. The sewer connection will be made in '''". ,~.:~
, .' , Carlsbad Boulevard.. All utilities will be' placed underground to eliminate
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their visual impact,.
,,2. Environmental Setting '. , .. ' "
. The proposed project I Royal Palms " ~s located east of Ocean street,
, south of Elm Avenue and north of Oak Avenue in' the City of Carlsbad. r.he
Pacific Ocean is located west of the site beyond Ocean Street'. The site ,
is within the jurisdiction of the San Diego Coast,Regional Comm.ission •. The
project will conform to the Coastal Zone Gonservation Act of 1972. The
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project will not encroach on any public beach area nor a'f£ect any scenic,
views.
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'Northern San Diego County has one of the most, equitable climates
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in t,he United States with warm dry summers and cool sunny winters. Rain-
fall averages about 10.7 inches per year with February as the wettest
month I averaging 2.5 inches of rainfall.
(a) Topography
The Royal Palms site is a 1.66 acre rectangul&r sect~on, of land., near
the Pacific Ocean. The project is in a developed area and the site' was',' :,
previously graded and used as a garden and recreational area for the Royal "
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, Palms Inn. This motel is adjacent to the eastern boundary line of the project".
A SWimming pool I no longer in use I occupies part of the site •. The rest of
the property is overgrown with vegetation.
,,' The site is a:.near level surface with elevations rangi~g' from '45 t<? 50
feet above Mean Sea Level. Storm runoff from' the'property flows to the west . . .
onto Ocean Street and eventually into the Pacific' Qcean.
" ' . (b) , ' Land Use
'The project site was previously us~d as a, garden and recreatibn area
for' the Royal Palms Inn ~ This motel will continue it~' operations on the'· ,
property adjacent to the eastern boundary line of ~he proj~ct site. 'The' mot.el
no longer requires the use of this property and it has. become overgrown with
weeds and brush. The existing swimming pool onthe'slte has beel) abandoned.
f01; several years.
Single and multiple family residential structures surrounding the, '
pr~posed project site on the north, west, and south are 'zoned R-3. rhe Royal
Palms Inn I a motel, is located to the east of the site I zoned C-2. The P·acific
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Ocean 'is located beyond Ocean Street to the west of the property. Down-
town Carlsbad is located two blocks east of the site.,
(c), Biology
The vegetation on the Royal Palms project site is 'characterized by
grasses of the rye family. The site was previously a well landscaped . ' . .
. garden but is no longer maintained. Fifteen Royal Palm trees still exist on . , " . I . , C~D.
the site. These trees will be relocated I if necessary I as part of the project., , , , ' ,
. No wildlife was observed' on the project site •. Wildlife expected to
o'ccur on the site would be typical of residential areas; primarily small
,rodents and birds.
No .endangered species of plants or animals were observed on the
'project site and none are known to be dependent upon the area.
, : ,(d)' Geology
the soils investigation indicated that the soils on the site generally
, consist of lightly cemented t brown silty sands. The findings show no ~
, . adverse geological conditions within the project area which would precl~de ..
development of the proposed project. Most of the Site has previous.1y been
graded to build the swimming pool which is now abandoned. A soils report
is included in the g,ppendix.
(e) Archeology
There are no archeological sites qn record for this area. Future
archeological discoveries are not expected as this site haS. bElen clisturbed
previously by grading operations. \ ,
3. 'Environmental Impacts
(a)· Land Use
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The proposed project I Royal Palms I will allow 62 families to move
into a ,modern residential development within a desirable area of the City
of tarl~bad. The density of the propol:?ed project is' consJderably less than
the, maximum allowable density indic~ted by the Carlsb~~ Gener?-l Plan. ': ;tic)!
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The General Plan allows a maximum of 70 dwelling units per acre. R.Qyql",
, ,',Palms is only planned for 37.3 units per acre. This will reduce the impact
of the project. '
No future extensions are planned foliowing the' completion of ,Royal'
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, Palms. No other projects are dependent on this development I nor will
they be directly influenced by it.
The proposed project will have the indirect effect of increasing rand
values in the surrounding area.
(b) Geology -Grading
There are no adverse geofogic conditipns within the project area
:, w'tJ,ich would preclude development of the project.
: ~ .:" '... No adverse effects should result from minor regrading of the site in,
: .' ,accordance with accepted engineering practices •. -~.
(cl' Biology
Development of the project will require removal or relocation of the:
v~getation on the site. Where possible I the Royal Palm trees, will be .
: relocated within the project area •..
New species of plants will be introduced into the' area through'land~
scaping of the project site. \.,
No endangered species of plants or animals will be aUected by the , ,
proposed project ..
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(d) Archeology.
As no archeological sites presently exist on the site I there will
be noarcheologic impact resulting from the development 6f the site ..
(e) Drainage -Water Quality
The drainage pattern on the site will hot change as a result· of .
.. the project •. The site will drain naturally downslope onto Ocean Street I
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and eventually into the Pacific Ocean. A slight increase in runoff may
result from the addition of paved surfaces within the project area •
. ' The water quality associated with the runoff Irom the project site
. should remain at its present level because of the developed nature of th~
project s·ite. The construction of underground parking facilities-w ill reduce
the effects of the project on water quality I since the parking areas. will net .
~ be flushed by storm runoff every time it rains.
Traffic
.-. I There will be a minimal increase in traffic associated ·with the
.. project~' Capacities are adequate on the surrounding streets to handle .'
any increase that might occur.
Current traffic volumes on Carlsbad Boulevard in the vicinity :of the·
proposed project are 9,000 vehicles per day as recorded in. April, 197"3.
Using an average of eight trips peT unit per day, it is estimated that traffic
~lll increase by 496 trips per day. This represents ·approximately a five· .
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percent increase over the existing traffic volume •. Ultimate traffic capacIty
on Carlsbad Boulevard is estimated to be 15 ,000 to' 20,000. trips per day.
Elm Avenue will serve as the major east-west route for residents of
the project, providing access to Interstate 5 I located one-half mile east of .,
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the site. Current traffic volumes on Elm Avenue east of Carlsbad
.' Boulevard are estimated to be 7,000 vehicles per day.
The two streets paralleling the project, site I 'Elm A:venue and Oak
Avenue I originate at Ocean Street and are used only to provide ace,ess
to local residences. Ocean Street forms a cul-de-sac one-half mile.
· north of the site and joins Carlsbad Boulevard one block south of the'
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, si~e. The Carlsbad Engipeering Depart·ni.e.nt estimates that not morj'" v,;/tE!!;:
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, than 500 vehicles per day use this portion of these streets. e0J16 F~
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,. (g): . ,. NOise
The existing noise level in the area is described as "clearly·
· acceptable" by the BUD Noise Assessment Guidelines. The Guidelines
· define "clearly acceptable" as noise exposure s'llch that both the inqoor
'and outdoor environments are pleasant. Traffic on Carlsbad Boulevard
is the predominate noise source for the project, but hecause of its low
traffic volume and distance from the site, the noise impact on the pro-.
poseq development will be insignificant.' The Pacific Ocean also con-'
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tril:;lUtes to the ambient noise level 'in the area.
The 'area surrounding the proposed site will be tempora~HY in~
, convenienced by construction noise. Noise from the contI'a'ctor's
. , equipment and other construction noises cannot be el~m.inated but will
,only occur between 8 a. m. and 5 p. in. Monday through Friday. This
noise will be of a temporary nature I lasting only until the project is
completed. It will conform to State and Federal codes relatfng to noise
levels.
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(h) ',/ Air Quality
, , The increase in air pollutants resulting from the future develop-
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ment 'of this site will be minimal. These are calculated on the following
pag~. The 'main source of air pollution resulting from the development' of
Royal Palms will be from motor vehicles. Another source is the consumption
of fuel to provide energy for residential and commercial buildings,. In CQ.ID-
parison with the total number of vehicles and homes in the Carlsbad arec;t f
auto emissions and other pollutants from the development of this site will ".
, be insignificant because of the small number of vehicles involved. The '. ., .
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quality of auto emissions cannot be controlled by the 'developer but <:.lre
regulated by State and Federal standards.
Pollutants and exhaust emissions from the contractor's equipment
wiil be within existing standards and will be of a temporary nature ..
(1) Utilities
,All utilities exist in the streets ~urrounding the project site';, Oak
Avenue I Elm Avenue" Ocean Street and Cart"sbad Boulev~rd. All utilities. ,
w~ll be placed underground to eliminate their ,visual impact ~ ,
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Gas and electric service is provided by San 'Diego Gas 'and Electric,
Company. Based on an average of 5 ,700 kilowatt/hours per uhit per year j
the proposed project of 62 units will use approximately, 353 ,400 kilowatt/,
,~ours per year. According to the San Diego Gas and Electr.ic Compa ~y I
residential power sales in San Diego County for the year ending January I , .
, 1973 were 2 1661, 000 megawatt/hours.
The City of Carlsbad calculates that 290 gallons of wat~r ,are used
per unit (2.9 persons) on an average day. The Royal Palms project will
. "",,",,,'"-~ -~~~ k.,o:;! '~, ~ '~a~' o..........E.'~.,. __ .. ~ '.1Im .,l.....;"."i; •. ' ....... ~ ... .', .... __ .'.~ --~.-. -----~, ~, .' ~ ~~'" . ".,. PM ~.~
, Estim9.te of Increase in: Emissions'
Mob lie ,_Statio.nary'_ .. _~~ .. _'I'otal ProjeCt ·S. D. Basin
Factor . US'age RateZ--·'-Tota'l-,·"-~" Factoi,l-:'-, -USage Rate3 Total" "'Combineq Total
Pollutant .ib/mJ.le·· miles/day , , ib/day.·' : ·'.lb/1 06ft3 . ' 106ft 3/day .. Ib/day , Total' ' ... tonS/day
. , '~~. ~_.. . _.:., ' '_.'~.:. .. _ ~.,'-'-:.tol1s/day .
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Carbon
MonOXide
Hydro-
Carbons
Nitrogen
Oxides
Particulates
Oxides of
Sulfur
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0.109 2153 2.34.7 20 .0002356 .' .29' .• 12
0.02 2153 . '43.1 8 '. " , , .0002356 .117 .02,
0.0134 2153 28.9 ' . 50 .0002356 .73 .01
, 0.00065 2153 1.4 19 ... .0002356 , .278 .0009 -:.
0.00039 2153 .B.4 0~6 .0002356 ' .• 009 .005 '
1 Environmental Protection Agency I '''Compilation of Air Pollutant Erhmis.ton Pactors ~ \I '.
AP-42 (revised February 1972) , P .1-9. ' ' ..
2Derived 'by considering the average mileage of 12.5 mll~'s/gal (EPA-1972·, P. 2-3) ,
the gallons of gasoflne consumed I 500 x. 106 g,al/year I for an automobile population
of is 0 ,00 a (ARB-1972, P. VII-B). This .. usage rate Is to be used unle,s,s more specifiC
informaUon is supplle.d }n the traffIo analysis'~ , .
3San 'Diego Gas & E1.ectrlc Co~p'any "Average Gas arid ElectriO usage rate$ of Residences'u
unpublished data 1972.' , .
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168·5 ~7
381.6
189'.3
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therefore use on the average of 17 ,980,gallons of water on an average day.,
Carlsbad has indiCated that sufficient capac'ity is available to provlde
water to the proposed project.
, Sewer service will also be provided by the City of Carlsbad. The
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Regional Water, Quality Control Board figures that 80 gallons of sewage .is
generated per person per day. At this rate I the residents of R~yal Palms
will generate approximately 14,384 gallons of sewage per day. The,
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existing sewers in Carlsbad Boulevard have adequate capacities to handle. vcr'
" any: ~ncrease created by the proposed development (Ocean Street Sewer , M, t ~
Study; Neste " Brudin and Stone I Inc. I October I 1972).
Communitl Services
Royal Palms is located w{thin the Carlsbad Unified School District.
"AccordLng to the estimate chart designed by the Carlsbad Unified
Sch<?ol District I the project will only generate seven elementary age,
children I five junior high age children I and seven high school age' ',,' . , ......
"children. These children will attend the Jefferson School for grades K ... 3 I
'th,e, Pine School for grades 4-6 I Valley Junior High Schoo~ and CarlS,~ad
, Bigh School. The capacities and average daily at,tendance of these
schools is as follows:,
School Grades ADA. Capf'lcity --.-
, 'Jefferson School K-3 408 510·
Pine School K-6 ,31'0 330
Valley Junior High 6-8 ,723 900
Carlsbad High 9-12 1396 1290
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The City of Carlsbad Police Department services all areas within,'
the corporate limits of the City of Carlsbad.
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The City of Carlsbad Fire Department will serv~" the proposed
project. Th~re is a fire station locat~d three-quarters of a mile eas t
. of the site.
(k) Visual -
'. The area effected by the changed visual.appearance of the project
site 'Will be limited because of the surrounding developments and the
slope 'of the land.
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.. ' All utilities will be placed underground to eliminate their visual
impact.
(i)'. Socio-Economic Setting
. The influx of population will be compatible so"ciE.illy.-and economically
with that of newer developments in adjacent areas. No significant dev-
iation is expected.
. The development of Royal Palms will not directly create. any additional
emploYfUent opportun.i.tie·s. . Indirectly, there will be {:m additional demand
for gardeners I electricians t plum?ers and other maintenance personne~.
During the construction phase there will be several employment
opportunities created' for carpenters I plumbers I electricians r and others in .
the construction field.
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ANY ADVERSE ENVIRONMENTAL EFFECTS WHICH CANNOT BE AVOIDED
SHOULD THE PROPOSAL BE IMPLEMENTED
The unavoidable adverse environmental effects resulting from. the
de,velopment of Royal Palms will be:
1. A ·slight traffic increase on Ocean Street I Elin Avenue I Oak Avenue I
and other area roads.
2., A minimal increase in air and noise pollution associated with.
, the -increased traffic.
3. " A temporary increase in noise associated with construction of
the project.
4.· A minimal increase in demand for public utili,ties and services.
Beneficial environmental effects resulting from the development of
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the proposed· project will be:
1. To provide 62 homes for families in the City of Carlsbad.
2. An increased tax base in the City of Carlsb.ad.
3.· To eliminate the hazard of the barbed wire and the abandoned
swimming pool.
4. To improve the appearance of the neighborhood by redeveloping,
an older area of Carlsbad.
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MITIGATION MEASURES PROPOSED TO MINIMIZE THE IMPACT
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'Vario'us measures will be taken to minimi'ze the minimal eriviron--
mental effects of the proposed development., The entire area will be
, landscaped and maintain'ed by the owner. The Royal Palm trees' will' be
. relocated on the site * Landscaping will improve the visual appe,arance
of the 'site -which is now unkept and overgrown.
Adequate parking for the proposed project will be placed beneath
the apartment units. This will remove the automobiles from sight and ':
m~nimize the'visual impact of the parked cars on residents and guests" '"
The construction of underground parking fi:wilities will reduce the effects
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of the project on water quality, since the parking area will not be "
flushed by storm runoff every time it rains.
A sWimming pool and recreation building yvill be constructed on
.. the site. This w111 provide recreational facilities for r~sidents of the
:development I thus minimizing the demand of the deve~opment o'n offstte
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,recreation areas ..
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ALTERNATIVES TO THE PROPOSED ACTION
Many alternatives are always available regarding land use'
decisions. The determination of the density of dweliing units and'
th'etr relationship to transportation facilities I u,tilitie's I community',
'services I and other land uses involves an infinite ,number of variables.
, One, alternative which is always available 'is to leave the property'
under private ownership in its present condition.. None of the
environmental impacts discussed in this report would occur if the,
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1'no"':proje.ct" alternative is s~lected. Property on 'CaFlsbad Boulevard,:
pres'ently has a market value of;"6 a sQuare foot making this alternqtive
impractical.
Any othe~ form of residential development would have impacts
similar to the proposed project. A conventional apartment building
, would appear to have more 'adverse effects with less amenities. An
., apartment building would probably be constructed at a high density
-without underground parking I landscaping or other recreatio,rial.
" facilities'. Development at a higher density would place a greater
demand on utilities and public services, and more traffic would J:>e
generated. Development at a lower density would require less utilities
and public services, and generate less traffic I but wou~d not be econ-,'
omically feasible.
Commercial or industrial development of the project site would not
be consistent with the planned land use set forth by the City 'of Carlsbad.
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E. . THE RELATIONSHIP BETVvEEN LOCAL SHORT-TERM USES OF MANIS
ENVIRONMENT AND ENHANCEMENT OF LONG-TERM PRODUCTIVITY
. The basic long-term effect of the proposed project on the
environment is the continued commitment of 1.66 acres of land to
residential use. The site is not in its natural state as the lanq was
previously developed.
, The project will allow 62 families to 'move into' a modem, well
landscaped apartment complex .in a de sirable area.· The plarined
density of 37.3 dwelling units per acre is considerably lower than
the allowable 70 units per acre de signated by the Carlsbad General
Pla~.. Development at this lower density will provide homes y;h.ile .
minimizing the environmental impact of the proJect.
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ANY IRREVERSIBLE ENVIRONMENTAL CHANGES V\THICH WOULD BE
INVOLVED IN THE PROPOSED ACTION SHOULD IT BE 'IMPLEMENTED
" Since the project is the redevelopment of a previously developed
area, the major environmental effect would be the consumption of
building materials and related natural resources. There, will also be,
a minimal increase in demand for public services and utilities
associated with the development of the ,proposed project.
" It is expected that the atmqsphere will absorb 309 pounds of
pollutants per day due to this project ~ As future scientHic advances
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cannot be predicted" it is not possible to classify this impact as
either reversible or irreversible.
The sound level of the area will increase but will remain within
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the IlClearly Acceptable II or IINormally AcceptableJl range as prescribed·
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by the U .8. Department of Housing and Urban Development. '
Storm runoff from the project will increase due to the introduct.icm
of impervious surfaces such as buildings, driveways, and other paved,
areas .'
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. THE GRQVVTH INDUCING IMPACTS OF THE PROPOSED ACTIVITY UPON'
. THE NEIGHBORHOOD AND/OR COMMUNITY
Royal Palms will have a very limited growth inducing impact on the
surround~ng area.' The properties surrounding the project site have
already be~h developed, and other properties in the area are presently
redevelopfng or planned for redevelopment at a higher density.
The'"growth inducing impact of the construction of 62 apartment units
; It?. this ar~awill'be negligible 4'
The proposed project will have the indirect effect of increasing
. , land values on surrounding properties. Increased land values will con-:-
, .
, tribute additional revenues to the City of Carlsbad.
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H. THE B'OUNDARIES OF THE AREA 'lvHICH MAY BE SIGNIFICANTLY
AFEECTED BY THE PROPOSED ACTIVITY",
The effects of the project on the biological component of the . '
environment will generally be limited to the immediate vicinity
of the project site. The area effected by the changed visual
appearqnce of the project site will be limited because of surrounding
development I ,the proximity-of -the PaCific Oce'an I' ,and the slope' ,
, of the larid.
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CERTIFICATION OF ACCURACY AND QUALIFICATION OF INDIVIDUALS
PREPARING DRAFT EI\TVIRONMENTAL IMPACT REPORT
, , The information contained within this analysis is certified tb be
accurate and correct to the best of my knowl~dge and be1ief~ and
reflects the environmental impacts associated with Royal P?lms.
, This report was prepared by Jeffrey Roy L1,lndstrom, Environmental
Cpns,ultant for Rick Engineering Com.pany, consultant to the _applicant I
Royal Palms I a partnership.
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J. LIST OF ALL AGENCIES" ORGAl'JIZll,.TIONS t OR INDrytDUALS CONSULTED
Rick Eri9inee~ing Company I Planning Consultants and Civil Engineer$
Carls'bad Unified School District
City or Carlsbad
Traffic Department
. ,Planning Department
Fire Department
Police Department
Water Department
,Sewer Department
'. ~ . ,
County of San Diego
Traffic Department
Soil and Materials Testing Laboratory of North County I' Inc.
, City of Carlsbad I Ocean Street Area Sewer Study; Neste'l Brudin and'
Stone I Inc. I October I 1972.
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-III.
, IV.
11.
VI.
VII.
TABLE OF CONTENTS
General Information
Purpose of Investigation
Field Investigation
A. Surface Conditions
B. Test Pits
C. Subsurface Conditions
Tests and Results
A. Grain Size Analyses
B. Density Tests
c. Direct Shear Tests
'Bearing Capacity
Con'clusions and Recommendations
Reference
APPENDIX
Plot Plan , .
Logs of Test Pit~
Specifi6ations tor Constructinn
of Cont~olled Fills'
Unified Soil Classification Chart
Page
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5.
5
7:
Plate.
2 thru 9
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SOIL AND MA.TERIlJ. TESTING LA..BORATORY ..
-OF' .N-O RTH cau NTY.. INC.
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PRELImINARY SOIL INVESTIGATION
ADDITIONS TO ROYAL PALms MOTEL
3001 CARLSBAD BOULEVARD
CARLSBAD, CALIFORNIA
I. GENERAL INFORMATION'
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, A preliminary soil investigation has been 60mpleted·fdr the
abovs refetenced site legally described as tha~ portion of Biock
14' and 1~F ammended map 365, an~ a portion 6f Tract 97, Carlsba~
,Land 'Map 1661, City of Carlsbad, County of San Di~go, 'California.
It is understood that the existirig buildihgs will be recGndi-
" ' tibned and that four additional apartment structures will be con-'
strunted. The n~w buildings will probably be similar to the ~tyle
an~ structure of the existing ones except',that the new buildihgs' ,
may be 3 cir 4 stories high; The foundations will be co~crBte wall
footings with concrete slabs-on-grade. Details of the structures
or any.grading'_were not available at the ~riting of this report.
PURPOSE nF' INifESTIGATION
, "
The purpose-of this investigation is to determine the following:,
: --1 -the existing soil conditions"
,,2 the presence and effect of any expansive soil,
3 ~the allowable soil bearing pressures,
4 -the ex~ent and compaction of any ~~istinQfill,
~--any construction problems that can be anticipatsd, and
to,make appropriate foundation recommendations.
FIELD INVESTIGATION
I A. Surface Condition
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. The site is roughly rectangular in shape and measures ~ppr6x-
imat'ely ,400 feet in the' north/south direction and 500 feet east/west.
The site is bounded by Elm Street" Ocean Street, Oak Avenue~ and
SOIL AND MATERIAL TESTING ,LABORA.'rORY ,
OF NORn~ COUNTY, INC.,-
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• Carlsbad 80ul~vard on the north, west, south and e~st respecti0ely.
The' areas in which the proposed apartmen~s are to be built are
fairly "le0el and presently grass covered. There were no obvious
man mad~ obstacles encountered in th~se areas during th~ investi-
gatidn Which, would hinder any grading.
/ ,B. Test Pi ts
,Eight exploratory test pits Were dug ~ith ~ backhoe on 15
'Januar~ ~~73 at the approximate locations indicated·on Plate 1
(red~awn fr6m the County topographic map suppiied to ~s by Rick
Eng. 'Co.). 'Disturbed and, undisturbed samples of the soil~ w$re
V~sual~y classified,by field identification proc~dur~in 'accQrd~rice
with the Unified Soil Cla~sification. A simplified ~ersio~ of this
1: Class.tfication is included in the Appendix of this repo:~t. Contin-
uouslogs of the soils encountered in the test pits were recorded
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,in'the' field. The logs of the test pi fs shown on Plates :2 t,o 9'
are'bas~d on the field logs, ,onlabor~tory ins~ection of the s~mple~,
and on the, soil test resul,ts.:
C. Subsuxface Conditions
,There was essentially one soil type ,based on cOlor, texture,
and'engineer~ng characteristics which was, encounteted dur~ng th~
investig~tidn. The main soil type i~ a brown silty 'sind of '~hiqh
the upp~r several feet is loose but grades with, depth to a we~kly,
cemented conditio'n.
Around ,the pool, especiall y ,to, the west in the 'vi cini t y of
Test Pi ts 7 and 8 is a layer of 3 to 5 feet of uncompacted, fill
material. This soil, presumably from'the excavation' of' th,e p~ol.,
'i's the same brown sifty sand but contains ~any roots ahd assorted
1-,debris. '
4
SOIL AND MATERIAL TESTING LABORATOltJ(
OF' NORTH COUNTY, INC •.
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• All t est pit s weI' e dug to firm mat e I' i alb e yon d the z on e' 0 f .
influence of the building ·loads.
IV.. TESTS AND RESULTS
A. Grain Size Analyses
, Six grain size analyses were perfor~ed on th~ soil types
encountered 'in general accordance with ASTM 0422-61T for classi-
fication.purposes and as a guide to engineering properties.
~he xesults are presented below:
GRAIN SIZE ANALYSES
Location Percent passing U.S.Standard Sieve Unified Soil
,Classi fica,tion
TP
TP
TP
, TP
TP
TP
TP
4 10 40 100 200
l' ® 111 '2 100.0 7./5.0 30.0 24.0, , sm
3
5
6
7
8
::
® 1 ' 100.0
@ 1 ' 100.0
® 1t' 100.0
® 3' 100'.0
® 6t' 100.0
75.0 29.0
75.0 28.0
78.0 31.0
.76.0 29.0
77.0 31.0
23.0
21.0
24.0 '
22.0
2'4.0
s,m
S fl1 '
SM,
sm:
sm
Te,st Pit
B. ,",bensi ty Tests
1 Laboratory Compaction
Two laboratory compaction tests were made on the upper
soil in opposite ends of the site tb,determine th~maximum
dry density and optimum moisture content as specified by
AST'm D1557-64T (method A) •. This test us'es' the inihus #4 sieve
'soil i'n a 4 inch diameter 4' inch high cylinderical mo~d,. The
,: ,sample is f6rmed with a 10 pound hammer falling 18'inchss faT
25 blows on each of 5 layers. \,\
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SOIL A,.ND :MATEIUAL ''l'''ESTING LA.BORkTORY.
OF NORTH COUNTY, INC.
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• LABORATORY comPACTION
Location
Test Pi t 1 ® 1'~ t
Test Pit 6 ® 1t'
:'2,-field Density Tests,
Max. Dry"
Density
(pcf)
130.3
133.0
Optimt;:Jm
, moisture
,Con'tent C%).
8.7
8.:;5
Six. field d,ensi ty tests were taken to determine' th,e .
natural conditions of moisture and, d,ensi ty~ The tests were"
performed'according to ASTM 01556-64, the sand cone,method~,
,MOisture/density determinations ,were aiso mad~ on paraffin coated
undisturbed samples b'y direct we{ghing and, 'the, lOat-~-i'sp,1:ac;..E~:::-" --'-' """,<;=-
c ..
me n t met hod. The;r at i 0 0 f fie 1 d dry den sit Y t (j the m a)d mu m'
laboratory dry density is defined as the rela~ivB .campaction •.
'These res~lts are presented on tha lo~~~
Direct Shear Tests
,'Two direct s~ear .tests were performed ~n remold~d samples of
the· laboratory compa'ctio~ specim'er:s to 'determine the b~aiing capaci t,y,'
'of the soil in which the footings of the buildings may bear.', Th'~
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':soil was remolded to 90% of the maximum dry d'en!;>i ty at 3% o,ver opt'imum' " ,l
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Three 2t" diameter 11( high samples, wer's: remo'lded and, 'then.'
,loaded wi·th normal loads of .5, ,1. O· ~nd ,1 .5 KSF, ' res'pectivel y. The
samp.les were then shear'ed to failure in the undrained co.ndi tlon ~ "
The results follo~:
Sample'Location
'T est Pit '1 ® 1 t T
Test Pit 6 ® 1'} f
DIRECT SHEP,R TE'ST
Dry Angle'of
Densi ty', 'Internal
(pcf) , Friction (0)
,117.0 39
'120.0 ,40
SOIL AND MA.~;RIAL TESTING LABORATORY'
-, " qF NORTHCOUNTY' I,Np.
'Apparent
Co!ie~ion
(psf)
200
,200
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• BEARING CAPACITY.
The values of internal friction and apparent cohesion'der~ved
'from the direct shear tests were used in the Terzaghi Formula in
accordance with the procedure outlined in Referen~e 1, page 170,
·to compute the allowable bearing capacity.
Terzaghi Formula:
Bearing Capacity ::: 2/3cN' c ' +, 0'0. Nt, +. t iBN;' '. f q . y.
,Assumptions:
Oepth of Footing, Of ::: 2'
lliidth of Continuous Footing, B ::: 1.5'
N' Nt . ~f ::: dimensionless para.met~rs found fro~' c' q' x·
·F i g '. .7 5, 'R e f. 1.
Factbr of safety::: 3.
ALLOWABLE BEARING CAPACITY
Te'st Soil'
Location Description,
Bearing,
Capaci t Y (psf}
Test Pit 1 ® 1t' Brown Silty Sand
". Test pit 6 ® '1tt Brown Silty Sand
335'0
3778
" " . ;'. VI. _ CONCLUSIONS ANO RECOmmENDATIONS
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, 1'-It is xecommended that the preparation of ' the native soil
and any gradin,9 be ~one in accordance with the'enclosed "Specifi-.
cations for Construction of Controlled Fills'! ex~ept if superseded
,by the following recommendations.,
. ,2 -The main soil probl~m will be the treatment Df the loose'
upper soil and the fill· west of the swimming' pool area.' 'The existing
grass and organic ,topsoil should not be. used under the b~il~~rigs.
It is recommended the 100s8 soil be excavated and recompacted to
90% of the maximum dry density. The approximate df,3pth of recom-
pact io n 0 flo 0 s 8 so i lis in the 0 r d 8 r .. 0 f 1-~" to 2 f f e G t b 81 Ow t Ii 8 '
'SOIL AND ]fATERIAL TES'rrNG 'LAEOHATORY
OF' NORTH COUNTY, INC<.
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~ .' existing grqund but the exact depth should be'determined by a
qualified~oil engineer in the field.
The existing fill detected in T~st plts'7"and 8 should be
'ex'cavat'ed, hand cleaned of the majority of roots' and debris' and
~ecompacted to 90% of the maximum dry density. The depth as ,
indicated on the logs varies from'3 feet near Test Pit 7 to 6 feet
near Test Pit 8.
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3 -' There was no expansive soil, ground water or bedrock en-
'co~nt~red d~ring the investigation.
, -" . , 4 -If our recommendations are followed, conventional footings
-maY,b~ designed to withstand a uniform bearing pressure of 3300 psf
for c6ntinuous or isolated foatings.
5 ~ Any large buried objects such'as septic ~anks pr pipes
uncover~d during the grading should be removed and the voids back-
filled with compact granular soil.
6 -If soils are enc6untere~ during gr~ding othe~ than those
..
described in' this report or imported material is used, additional
testing will b~ required to ascertain their engineering ch~racte~
, istics'.
SOIL A.ND MATERIAL TESTING LAnORATOR1!
OF NORTH COUNTY, INC.
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REFERENCE -_._._--.':.. ... ;..... ..
~ . -"'!:'=--
. 1 -TeI'z aghi and Peck, If Soil fi1echani cs in Engi n eer ing pract.t ce" ,
John lliiiey & Son, N.Y., 1948.
Respectfully supmitted,
. SOIL AND mATERIAL ·TESTING -
LABORATORY OF .. NORTH COUNTY, INC • ....
ClaUde B. Parker
Register.ed Civil Engineer #18,987
'Registered Geologist #512
pe
Distribution: 2 Addressee
4 Rick Engineers~ Attn: Jack Raines
.
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SOlL AND M.A.TEnrAL '£ES".trNG LA:non.A..1.'OItY ..
OF' NORTH COUNiY,"lNC •.
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TEST PlT
PROPOSED BUILPlfJG
NOTE: OIMEIJSIOlJS ARE SCALED
FROM COU/JTY TOPa MAP
SOIL AND ~fATErUAI ... '1'ESTr~G LABORATORY
Of' NORTH COUNTY, INC.
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OCEAJJS/ DE CALI.::::: ,!
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..JOB MOo 73-2 '
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• LOG 0 F B 0 R I N~-----'.·' -.---.~-----'-'l
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BORING' NO. lest 12 j t.-Jl='J
ELEVATION
. SAMPLING
METHOD Backhoe
Brown Sil ty Sand '-top 1811
loose -roots to 1511
grades weakly cemented at 2t
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4.7 p15." 88.3,
S 'lT-''' 1 .,..... i 1--_-+-_-1 ___________ ..:::.;:o:..::~:.:::..._~y...t:'p:...::e:.__=_1.!.l: .!.l:!.!: .:.L: !:j-:' -----'--+-~-+-,-___i . i r Bottom
C) Field D·ensi ty Test J
f
6 Undisturbed Sample ' .I
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0 Distu'rbed Sample
Dote:15 January 1973
By: c., Parker
Royal Palms
Elm & Oak, Oceanside
Job No, 73-2
Plate No. 2
§~!l n.. &.: M,"~ lH:lf.!flAEL lfa:§1fn NG -1t~tD{[)lDk 1f~[Q'o/
O,r N·O F<T H ,C 0 U N ;r YIN C.
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I-..... w
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2-
3-
4-
6-
7-'6
-
-
-
-
-
--
0-3: z 0 ::::. _J 0 cO U
"
LOG OF BORIN
BORING NO. Test Pi t #2
HEVAT:ON --------------
SANIPLING MEiHOD ____ ~B~a~c~k~h~b~e _______ _
Brown Silty Sand
loose
gradtl§ f.irm at 18"
weakly cemented ® 2'
Z Q ... < u
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Date: 15 January 1973 Royal Palms Job No.
By: C • Par k e r Elm & Oak, Oceanside' Plete No.
§<DU!L &. M.A)'fl1:CRaAlL lHE§1fB!<::l<O·fLA1Ba)IDAlf<Dl.R'o/
OF NORTH COUNTY' INC.
---~J -C~ (j, 2 z
':O! <; t c' :: ;;; 0 Z w :E >-~ 'oJ
Ci 0 ~ 0 ~ :;. .:... >-w ;~.! u u W 0
"--0 2-c" v
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4-.-
5-
6-6
7-, ,
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-
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~-------------'---~,-,-..::... .. :"",--,-,-.. --
LOG OF BORING
BORING NO. Test Pi t fr!:'3
ELEVATI01'l ~ ________ _
SAAAPLING
METHOD __ .::::B..:::a..:::c:.:.:k:.!..h.:..::o::...:e~-;, ___ _
----------------
Brown Silty Sand
loose to 18 11
roots
weakly cemented ® 2'
difficult digging
Soil Type 1
Bottom'
~
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-, Z ~/. Q :::> 1? .... .--.~ v. < (5 =-~ -" ..... ~ >-v-a 5 v. :5 ~ ::! ,.~~ '.,J u.. -
Dote: 1 SJanuarv 1973 Royal Palms Job No.
By: C Parker Elm & Oak, Dceanside Plate No.
'§cornL &4 MA1TG:lPfiAIL lJCE§lTU1"HG -'tLAtBCl)"RAlTCD'iDY, , " ,'~
OF NORTH C,OUNTY INC.,
,_ .. --
,-
" --' z ;.-(; :7; z W '..1 .. " '::::: "-::'., 0 ~ ~~ .. :::-~ >-... u uJ rJ a (., (~ -'
89.5 6-8. 7
11.11 • L 8 5 • 2
73-2
4,
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r----,-----.----,-------------------------
BORING NO. _----'-,_T!..:e=s~t:......!P_'l=_· ~t~/f_.:.::"4!...' --,--z Ii··, = Q ," ~~, ELeVATION ____________ :;: Vi ~" ~ ~ 6> Q SAMPLING u. :E >-. ..J
,I.,AETHOD Backhoe ~ ~ 0 0 Q
Br6wn Silty Sand
loose, with roots to 2t'
-<: -' >-:::: o .....,,' ~ (,~t C"L >J <J>U u..-p~
! :' :' : .. .. : : .
.... L._'. -",
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:' : : :: 4 8 87 7 67 3 I weakly cemented ® 3'
6-
-
-
-
-
-
,-
Dote: 15 January 1973
By: C • Par k e r
Bottom
Royal Palms
Elm & Oak, Ocean~ide'
: : : :: ' • '., '. J ..... '
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: Sffi:
Job No.,
f~lo!e No.
, '
5
§COlla. & MA1flEn:?tlALL lfES-WllklG·tLAID<DtDA"iflDlR'Y
Q·F NORTH C-OU,NTY (N.c.
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Date:
D i;"', uy: .
LOG OF BORI G
BORING NO. Test Pi t 115
ELEVATION ________ --.:. __
SAMPLING METHOD Backhoe
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(5 -< -" u .... , o~
V> u..
C) /
.
I:,{ :
Brown Silty Sand -loose to 24" !Y,:"
root ® 2~' 11 1:1;1' I: 3. 1 zone ,I; i; I: I· I:: weakly cemented @ 3' 1.1: i; ': H
I:;; : 11 ':': . I' : -! I:
·:6
6
sm:
. lil:I·,:ll I: I: 1'1.1'1' . "1:1.1;1; I: II
1:':,:111;
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; I : I: I; : :1.:1: I:· . I: ;! ~ : 3.4 ,. I-'I-
firm l:j ;.1 ; I: I-
1:1. 1:1-
Soil '-1:1.1-" Type 1 1;1;1; I:
Boftom
. :
.
15 January 1973 Royal Palms Job No.
Cc Parker Elm & Oak, Oceanside Plate No:
§<D.!lll. .sic M4:..1fElPfik1L 1fE§1fflf:<:!G -iLkIDtDp:?4lT01R'SY.
OF NORiH COUNiY INC,
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'1 . ·1 I-------:--~~:'----'--'--"'----'-'!
't LOG OF· BORIN l
~ __ -. __ ---. ____ ~ ____ -__ ----__ --______ --_______ ------_-,--___ r-~--~---~_~1
~ ;
Z ILl 6.:
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:r: >-c-O) UJ :E .,'.-.... w o. ..... ~ :::> "I' Z 0
2-
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... ~ .... ~ 0 oj 0 U
JI . T est Pit. 1[,_-6, __ ______ Bm~lNG NO.
ELEVA liON _________________ ' __
SAMPLING
N\ETHOD ___ ---.-:8:::..::::.a.=c.:..:k:..:.h.:..:o::...::.e ___ -':-__
Brown Silty Sand
loose -moist
(root zone ® 3 f )
UJeakl y cement ed
grades lighter color
z Q r-< u . .... Vi
..JVl oS .."u
Dote: 15 Janu ary 1973 Royal Palms Job No.
By: C. Par k e I'
Elm & Oak, Oceanside Plate No.
§0~i1.. &. Mk.1Tli: ~.RJ' .. :JL 1[.,rs.:§J[.B ~ G -!Lkl.BCD.[QAJJ.Q).R'Y'
OF NORTH COUNTY INC.
73-2
7
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Test
LOG OF BORIN
.. -BORH..JG NO. Test Pits #7 & #8
ELEVATION ~ _______ ' __
SAMPLING
METHOD 8ackhoe
P (t 40 ~ UJ 8 S t a f fence @ no i t h end
l 'iii of oool)
Brown Silty Sand
loose FILL
concrete bits, glass, brick
Soil Type 1
Brown Silty Sand
firm
NATIVE
weakl y 'cemented
Bot am
Test Pit #B
Soil Tvpe 1
( 45 f ·W.of fence ®S. end of 0001)
Brown Silty 'Sand
loose to 2'
tile, glass
dead roots to 51
FILL
I:.:lroUJn SiTty Sand
NATIVE
weakly cemented
Soil Type 1
Soil Typ8 1
Dafe:15 January 1973
By: C. Parker
Royal Palms
'Elm & Gak, Oceanside
OF NORTH COUNTY 'INC.
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,J L.j '. ~ '" ... "j (j v, '.J .;;: -0 r/~ '" 'J
. .-;' .., 07.:.:.82 ....
i
20. 1 92.2
Job No. 73-2
Plat'e No. 8
'-.-.::""....-:-:--.-.~ ... . -----=-": ~ ,
, J
SOIL AND ]'lATERIAL TESTING LABORATORY
OF NORTH COUNTY, INC.
'.
423 HALE AVE, -ESCONDIDO, CALIF, 92025
ESCONDIDO -746-2333
SPECIFICATIONS FOR CONSTRUCTION OF CONTROLLED FILLS
GENERAL DESCRIPTION: The construction of controlled fill,s shall consist.
of adequate p'r~limi'nary soil inv'estigations, and 'cle-aring, removal of
existing sttuctures and foundations, preparation of land to be filled,
excav~tion of earth and rock from cut area, compaction and control 'of
the' fill, 'and all otheT work neces sary to complete the gradi ng of the
filled areas" to conform with the lines, grades, and slopes as shoUJn on
the accepted plans.
CLEARING AND PREPARATION OF AREAS TO BE FILLED:
(a) ,All fill control projects ~hall have a preliminary soil invsstigation
Or a visual examination, depending upon the nature of the job; by·a qual~
ified soil engineer prior to grading. '
(b) All timber,' trees, brush, vegetation, and other rubbish shall he re..,.
mov~d" piled and burned, or otherUJise disposed of to leave the prepared
areas ~ith a finished appearance free from unsightly debris. '
,(c) Any 'soft, swampy or otherwise unsuitable areas, shall b~. corrected by
,'draihage or removal of compressible material, ~r both, to the depths in-
:" dica~ed on the, plans or as' directed by the soil I?r,gineer.
(d) The natural 'ground which is determined to be satisfactory for the
'support of the filled ground shall then be plowed or scarified ,to a depth
of atleas~ six ,inches (6 11 ) or deeper as specified' by the soil engineer, .
and until the surface is free from ruts, hummocks, or other uneven fea-
tures which ,would tend to prevent uniform compaction by the, I?~UipmenttQ be used. ..,
:(e) No fill shall be pl~ced until the prepared native,9round has been
app~oved ~y the soil engineer.
(f)" 'UJherl;?, fills are made on hillsides wi th slopes' greater than 5 (ho,ri-
zontal) to 1 (vertical), horizontal benches shall be cut into firm un-
disturbed natural ground to provide lateral and vertical stability. Th~
initial bench at the toe of the fill shall be at least 10 feet in width
on firm'undisturbed natural ground at the elevation, of the toe stake~
The soil engineer shall determine the width and frequency of all suc-
cl?eding b~nches which will vary with the ,soil conditions and the steep~.
ness' of slope.
(g} After, the natural ground has been prepared, it shall be brought to
the proper moisture content and compacted to not less than 90% of ~ax-":
imum density, A~S.T.m. D1557-64T.
-1-
',>
II •
(h) Expansj,v8 soils may require special compaction, specifications .
as directed in the preliminary soil investigation b~ the soil engineer.,
(i) The cu~ portions of building pads in which rock-like .material ,exists
may requir~ excavation and recompaction for density compatibility with
the fill as directed by the soil engineer.
If
11
I mATERIALS: ·The fill soils shall consist of select 'materials' graded ~o '
that at least ,40 'percent of the material passes the No. '4, sieve.' The .
'material may be obtained from the excavation, a borrow pit, or by mixing
soils from one or more sources. The material used shall be free from
vegatable matter, and other deleterious substances, and shall hot contain
rrocks or lumps greater than 6 inches in diameter. If excessive vegstationJ I 'rOcks, Or soils witb unacceptable physical characteristics are encountered,
these ~aterials shall be disposed of in waste areas designated on the plans,
or as directed by the soil engineer. If soils are enc6untered during the I ', ~rading operation which were not reported in the preliminary soil invest-
igation" further testing will be required to ascertain their engineering
prope'rties. Any special treatment recommended in the preliminary or sub-
I',' sequent soil reports not covered herein shall become an addendum to these
specifications. '
'No material of a perishable, spongy, or otherwise unstable n~~ure shall
be used in the fills.
, PLACING, SPREADING AND COm¢ACTING FIll mATERiAL: . _." ~,(a) The selected fill material shall be placed in iayers,which shall I, 'not exceed six inches (6 11 ) when compacted. Each layer shall be spread'
. e~enly, and shall be thoroughly blade-mixed during the spreading ,to insure f ,uniformity of' material and moisture in each layer.'
(b) When the moisture content of the fill material is below that speci-
fied by the soil engineer, water shall be added 0ntil the moisture con~
'I tent is near optimum as determined by the soil' engineer to assure tho~-
'ough bonding during the compacting process.' ,
(c) When the ~oisture cont~nt of the fill material is above that s~eci
fied by the' soj,l engineer, the fill material shall be aerated by blading
and scarifying, or other satisfactory methods until the moisturB content
is near optimum as determined by the soils engineer.
Cd) After each layer has been placed, mixed and'sp~ead evenly, it shall
J ' be thoroughl y 'compacted to not less than the speci fl ed maximum deT)si t y
I in accordance with A.S.T.M. D1557-64T. Compaction sha~~ be by meahs of
1 tamping or sheepsfoot rollers, multipl,e-wheel pneum-atic-tired rollers,' or
.' other type~ of rollers. Rollers shall be of such design that they will
1 qe able to compact the fill to the specified density. Rolling of,each
layer shall be continuous over its entire area and the roller shall make
sufficient 'pas~es to obtain the desired density. The entire area to be
filled shall be compacted to the specified density. •
SOIL AND I1IATERIAL TESTING LABORATORY
OF NORTH COUNTY, INC.
-'').:...
I ,
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III
II
II
II
II
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•
(e) Fill siopes shall be compacted by means of sheepsfoot rollErrs or
other suitable equipment. Compacting operations shall be contj.nued until
the slopes ar:e' stable but not too dense for planting and unti.;L there is
no apprecia~lB ~mount of loose soil on the slopes. Compacting of the
sl~pes shall be. accomplished by backrolling the slopes in inciements of
3 to 5 feet in ~levation gain or by other methods producing &atisfa~tory
results.
(f) Field density tests shall be made by the soil engine~r for approx~
imately each foot in elevation gain after compaction, but n~t to exc~ed
two feet in'v~rtical height between tests. The location of the tests ,in
plan shall be spaced to give the best possible coverage and ·shall·be
taken no Farther than 100 f~et apart. Tests shal~ be taken on corner
and terrace lots for each two feet in elevation gain. The soil eng~neer
may take additional tests as considered necessary to check o~ the u~iform
ity of compaction. Where sheepsfoot rollers are used t the tests shall'
be taken in the campacted material below the disturbed'sutface. No
additional layers of ,fill shall be spread until the field density tests
indicate ~hat the specified density has been obtained.
(g) The fill. operation ~hall be continued {n six inch (6 11 ) bompacted
layers t as specified above, until the fill has been brought to the fin-
ished slopes and grades as shown on the accepted plans.
SUPERVISIO~: Supervision by the soil engineer shall be made during the
filling and compacting operations so that he can certify that the fill
was made in accordance ,with accepted specificati6ns.
The specifications and soil testing of subgrade, subbase, and base
materials for roads, or other public property shall be rione in accordance
with specifications of the governing agency.
SEASONAL LIMITS: No fill material shall be placed, spread, or ~olled
during unfavorable weather conditions. When the work is ints-rrupted
by heavy rain, grading shall not be resumed until field tests by the,
soil en~inBer indicate that· the moi~ture content and density of the fill
are as previously specified. In the event that, in ,the opinion ~f the
engineer, soils unsatisfactory as foundation material are' enqowntered,
they shall not be incorporated in the grading and disposition will be
made at the engineerls discretion •
SOIL AND ]'IATERIAT.l TESTING TJAEORATORY
O~-NORTH COUNTY, iNC.
-3-
lED SOIL CLASS! lCATION
I!
I ·1) , J , 1
II
II
II'.
mr'
IDENTIFYING
CRITERIA
1. COARSE GRAINED
'('more than 50% #200 sieve)
GRAVELS
1more.than 50% #4 sieve
but smaller than 3 inches)
Non Plastic
SANDS
(More .than 50% smaller
. t han ·#4 s i eve)
Non'Plastic
II.' FINE GRAINED
lMore than 50% smaller
than #200 sieve)
Liquid Limit
·less than 50
. li.quid limit
greater than 50
,J;;: -. •
~ :' III.' HIGHLY ORGANIC SOILS
'1 ~
GROUP
SymBOL
Gill
GP
GM
GC
SLU
SP
sm
SC
ML
CL
OL
MH
CH
OH
PT
SOIL
DE.SCRIPTION·
GRAVEL, well graded gravel ....
sand mixture, li~tle or no
fines.
GRAVEL, poorly graded gravel-'
sand mixt~re~··little or no . i
fines.
GRAVEL, SILTY, poorly. graded
gravel-sand-silt mixtureso
GRAVEL, CLAYEY, poorly graded
gravel-sand-clay mi~ture.
SAND, well' graded ,gravr;31;L y
s a'n d s ,Ii t t Ie 0 r no fin e8.
S AND, po 0 r 1 y grad ed, gT a veIl y.
sands, little or no fines.
SAND, SILTY, poorly graded
sand-silt mixt~res.
SAND, CLAYEY t poorl y grad ed
sand-clay mixtures.
SILT, INORGANIC, silt and fine
sand, sandy ailt or clayey-
silt-sand mixtures with slight
plastici ty.
CLAY, INORGA'NIC, 'clays of low te'
mediDfu pla~ticity,. g~avelly
clays, sandY claYB, silty claY~J lean clays. . .
SILT, ORGANIC, silts and 01'-
ganlcsilt-clays of low
.plasticity.
SILT, ~NORGANICj silts micaceouE,
or' c;:Iictdmaceous' fine s.andy ·or
sllty.soils, elastic silts~
CLAY, INORGANIC,. claysbf med-
ium to high plasticity" fat
clays. .
.' . • v"" " ~
CLAY, ORGANIC. tlaye of medium-
to high plastici ty.
PEAT, oth~r highly arganic'
. swamp s,011s ..
SOIL AND II-IA'.rERIAL TESTING LABORA':rORY
OF NORTH COUNTY, INC.