CO, tA 94111 AP- 1455€¦ · 14/05/1982 · 1455 We are pl!lcing on open file the following report, reviewe and approved by the City of Arcadia in compliance with the Alquist-Priolo

iA:.~.'THI! . RlSOLiRC;'!S ·,

p~M :A i4fiP:~'¢dN$iaYATION pi5'; j\)f,f()F1MINES AND

' ...... ·~; ... · ' ' ' : ';·: .·.' ' ,. ,·

SAN: C1CISCO DISTRICT OFFICE fTll;':W( ~~ ··iiNG

'~CO, tA 94111

AP-, Donna L. Butler, Associat'e Planner City of Arcadia Planning Department 240 W. Huntington Drive Arcadia, California 91006

Dear Ms. llutlcr:

1455

We are pl!lcing on open file the following report, reviewe and approved by the City of Arcadia in compliance with the Alquist-Priolo Special Studies Zones Act:

Report of fault rupture investigation, Raymond fault, ba.rn additions, Santa Anita Park, Arcadia, California, Angeles Turf Club; May 14, 1982; by LeRoy Crandall and

roposed horse for the Los Associates.

EWH: lg

cc: A-P file

Sincerely yours,

c·~~/~ Theodore C. Smith/CEG 1029 for EARL W. HART

. , Office of the State Geologist 'CEG 935

i'i , . . ,·.

\~·····.····.·· .. ···.·· .. · ...

.. .. ,

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GEORGE J. WATTS CITY MANAGl::R

June 7, 1982

Mr. Earl W. Hart

240 WEST HUNTINGTON DRIVE ARCADIA, CALIFORNIA 91006

(213) 446-4471 • 681-0276

Office of the State Gecilogist Division of Mines and Geology Ferry Building San Francisco, California 94111

SUBJECT: Geologic Report for the Santa Anita Race Track

Dear Mr. Hart:

CITY COUNCIL

DONALD D. PELLEGRINO MAYOR

DENNIS A. LOJESKI MA YOH. l:'NO 'rf:MPORf:

JEHREY A. ll~ING RICHARD A. HALTOM

DAVIDS. HANNAH

CHRISTINE VANMAANEN CIT\" CLERK

Enclosed is a copy of the seismic study and the report by our geologic consultant on their review of the seismic study for the proposed construction of horse barns at Santa Anita Park. Our geologist concurs with the findings of the study.

I have reviewed all the data and approved the project relative to the Alquist-Priolo Act and City of Arcadia Ordinance 1581. The applicant has al.so been informed regarding said approval of the geologic study.

If you need any further information, please contact me.

Yours truly, . , . ..-:·'""

i,' _,...,...'· .-·:/....-_,....;;. ~

Donna L. Butler Associate Planner

db

Enclosure

June 2, 1982

City of Arca di a Planning Department 240 West Huntington Arcadia, Californi.a

Ori ve 91006

Converse Consultants Geoteetinit:al Engineering ttnd Applied Sciences

C-~E:C:.::;BVcf)

JUN .; 198? C:TY OF ARr 1"'LANN1NG 6~:

Attention; Donna L. Butler, Associate Planner

Subject; REVIEW OF ALQUIST-PRIOLO FAULT STUDY REPORT "Report of Fault Rupture Investigation, Raymond Fault, Proposed Horse Barn Additions, Santa Anita Park" Job No, E-82112, May 14, 1982 CCI Project No. 82-1155-01

Gentlemen;

In accordance with your letter of authorization dated May 25, 1982, and our work agreement dated April 8, 1977, we have reviewed the su.bject report.

Plate I of the subject report shows that the site of the proposed horse barn additions is located within the Raymond Fault Special Studies Zone (State of California Alquist-Priolo Map: Mt. Wilson, 1977, 7.5 minute Quad sheet). The consultant performed a subsurface investigation relative to the potential for surface fault rupture and concluded;

"Based on the corre 1 at ions between the borings, we do not find evidence for fault ruptur~ within the planned construction area. In our opinion, the probability of fault displacement during the life span of the structures on this site is low.''

Our review of the consultant's report and the consultant's interpretation of boring logs indicates that the subsurface investigation (correlation of 14 bore holes) is adequate and meets the requirements of the Alquist-Priolo Special Fault Studies Zone Act effective March 7, 1973, We recommend that the subject report be approved from a fault rupture standpoint.

Respectfully subrni tted,

CONVERSE CONSULTANTS, INC.

D~,,~~ Q ?e-iQtft_ Danie I ll, G1 I ette Staff Geologist

DRG/HAS:mr

Reviewed and approved

Vice Presidentf~Manager

Converse Consultants, Inc. 126 WAst Del Mar Boulevard Pasadena, California 91105 Telephone 213. 795-0461

I I I I I I I I I I I I I I I I I I I

REPORT OF FAUI,T RUPTURE INVESTIGATION RAYMOND FAULT

PROPOSED HORSE BARN ADDITIONS SANTA ANITA PARK

ARCADIA, CALIFORNIA FOR THE

LOS ANGELES TORF CLUB (OUR JOB NO. E-82112)

I


LeROY CRANDALL AND ASSOCIATES consulting geotechnical engineers, 111 n. alvarado st., los angeles, ca. 00026, 1213) 413-3550

.. !fay' 14, 1982 .... Los Angeles Turf Club, Inc. Arcadia, California 91006

Attention: Mr. Paul Hvidston General Superintendent

Gentlemen:

(Our Job No. E-82112)

Our "Report of Fault Rupture Investigation, Raymond Fault, Proposed Horse Barn Additions, Santa Anita Park, Arcadia, California, for the Los Angeles Turf Club", is herewith submitted.

As discussed in the report, no evidence for fault rupture in the area of the proposed construction was encountered in our exploratory borings, and it is our opinion that the possibility of future fault rupture is low in this part of the property. Although this study does not specifically include liquefaction analyses, this possiblilty cannot be ruled out in the event of strong shaking at the site. There are no other unusual geologic co11ditions present at the site. The trace of the Raymond Fault is probably located about 125 feet northwest of Boring 10, and it would be prudent to maintain a 25 foot setback between the northernmost end of the planned tackrooms and the fault trace.

The results of our investigation are presented in our report. If you have any questions regarding this report, or if we can be of further service to you, please do not hesitate to contact us.

MJ-AC/jj (6 copies submitted)

Yours very truly,

LeROY CRANDALL AND ASSOCIATES

by ~~he( Alice Campbell Staff Geologist

by ~~ Mervin E. Johnson, C.E.G. 26 Principal Engineering Geologist


E-82112

REPORT OF FAULT RUPTURE INVESTIGATION

RAYMOND FAULT

PROPOSED HORSE BARN ADDITIONS

SANTA ANITA PARK

ARCADIA, CALIFORNIA

FOR THE

LOS ANGELES TURF CLUB

INTRODUCTION

Page 1

This report presents the results of our exploratory drilling

program in the area of the proposed horse barns. The purpose of the

investigation was to discover whether past ground rupture associated

with the Raymond Fault is present within the proposed building area.

The Raymond Fault is included within an Alquist-Priolo Special Studies

Zone, which requires local governments to withhold approval of con-

struction permits in these zones until a geologic investigation has

determined, using available evidence and state-of-art methods, that the

site is not threatened by surface displacement from future faulting.

Appendix C of California Division of Mines and Geology Special Publi-

cation 42 "Fault Hazard Zones in California", revised March, 1980,

provides guidelines for the required studies. CDMG Note 49 provides

further guidelines for evaluating the hazard of surface fault rupture.

The site lies within an Alquist-Priolo Special Studies Zone

established on the Mt. Wilson Quadrangle dated January 1, 1977. The

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E-82112 Page 2

entire proposed building area is included within the zone as shown on

Plate 1, Location Map.

Our professional services have been performed using that degree

of care and skill ordinarily exercised, under similar circumstances, by

reputable engineering geologists practicing in this or similar localities.

No other warranty, expressed or implied, is made as .to the professional

advice included in this report.

PREVIOUS STUDIES

Our firm has conducted four studies in the area around the

proposed additions, and information from these studies has been used to

supplement the information obtained in this study. Our previous studies

were:

Job No. E-77124 - Report of Geologic-Seismic and Fault Rupture Investigation, Proposed Horse Barns, Santa Anita Park, dated May 18, 1977.

Job No. A-77124 - Report of Soil Investigation, Proposed Horse Barns, Santa Anita Park, dated September 11, 1977.

Job No. A-77076 - Report of Foundation Investigation, Proposed Vehicular Tunnel, Santa Anita Park, dated April 27, 1977.

Job No. A-82073 - Report of Foundation Investigation, Proposed Storm Drain Channel Cover Project, Santa Anita Park, dated April 7, 1982.

Note that some of these projects were done for purposes other

than geologic interpretation. Therefore, the field boring logs were

consulted and re~interpreted for this project. In some cases, this had

led to minor differences in soils classifications between the interpretive

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E-82112 Page 3

boring log cross sections and the .logs of borings from our previous

reports.

SITE CONDITIONS

The site is approximately 600 x 450 feet in plan, bounded on the

southwest by a 14 x 16 foot concrete box channel for Arcadia Wash, and

by existing horse barns to the north. The site is now a paved parking

lot, and slopes southeasterly with elevations varying from 493 feet on

the northwest to 473 feet on the southeast side of the site. The site

is underlain by about 10 feet of fill. The original ground surface is

about at the level of the maintenance buildings to the noth. No accel

erated erosion conditions were noted on or adjacent to the site. Before

drilling, water levels beneath the parking lot were unknown, but thought

to be shallow. During drilling, we discovered that the exact locations

of utility lines were also unknown.

GEOLOGIC CONDITIONS

GENERAL

Santa Anita Park is located on the south edge of the Sierra

Madre Piedmont Slope. The Sierra Madre Piedmont Slope is bounded on the

north by the San Gabriel Mountain$, which are part of the Transverse

Ranges Geomorphic Province of California. Locally, the Piedmont Slope

was formed by the depositional action of Santa Anita and Arcadia Washes.

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E-82112 Page 4

GEOLOGIC MATERIALS

The materials beneath and near the site include artificial fill

up to 17 feet deep, pond and stream deposits of Holocene age, and Pleisto

cene alluvium. The exploratory borings encountered silty sand, silt,

and organic silty and clay interbedded with sand and gravel layers, some

of which are decomposed. According to CDWR Bulletin 104-2, the alluvium

extends to about 400 feet below sea level or 890 feet below ground

surface.

The alluvial materials are presumably underlain by granitic

basement similar to that in the San Gabriel Mountains to the northeast.

The surface 20 to 25 feet of materials are generally. very soft, while·

the older alluvium below about 30 feet is denser and more consolidated.

GROUND WATER

The site 1s within the Santa Anita Hydrologic Subunit of the

Main San Gabriel Valley Hydro logic Sub area. The Raymond Fault is con

sidered the dividing line between the Raymond and San Gabriel Basins.

Ground water at Well 1N/11W-28Cl, located about l ,000 feet east of the

site, was at Elevation 525, a depth of about 30 feet, in Spring 1979.

Historic high water levels have been at ground surface, and the site is

within or just east of Mendenhall's 1904 artesian area. The area was

swampy when the fill was placed, as indicated by large amounts of tules

that were encountered in one of our previous borings. Present perched

ground water levels are about 15 feet below the parking lot surface, hut

only a few feet from the natural ground surface beneath the fill. A

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E-82112 Page 5

second perched zone was encountered at about 30 to 35 feet. The present

regional ground water surface is not known.

BACKGROUND DATA SEARCH

RAYMOND FAULT

The potentially active Raymond Fault was first recognized as a

fault by Eckis (CDPW, 1934). The first detailed description of the

fault is by Buwalda (1940). The fault has disrupted the older alluvial

deposits and forms a ground water barrier that was recognized by Mendenhall

(1908). There has been a history of springs, lakes and artesian wells

as well as north-tilted surfaces located on both the south and the north

side of the fault, as noted by Buwalda. The lakes on the south portion '

of the adjacent Los Angeles County Arboretum arc typical examples. No

movement within historic time has been attributed to this fault. Recent

studies by U.S.G.S. (unpublished, 1982) along the fault in the vicinity

of Sunnyslope Reservoir have suggested movement within the last 3,000

years.

In the vicinity of Santa Anita Park, there is evidence from deep

water wells for at least 300 feet of offset of the base of waterbearing

materials along the Raymond Fault. The fault does not, however, have a

pronounced effect on gravity measurements in this area, as seen in

C.D.M.G. 's Open File Report 79-16LA. Their gravity map indicates that

there are blocks of high-density material with straight, steep sides

that trend across the Raymond Fault. If these are interpreted as

faulted blocks of basement rock, they do not match the trend of any

I

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Page 6

surface faulting or faulting interpreted from water well data. In

particular, they do not match the trend of the Eaton Wash Faults mapped

by the C.D.W.R. (1971), which lie about 2,000 feet west of the site. In

general, the gravity data do not shed much li.ght on the location of the

Raymond Fault in this area.

We have reviewed the three references used to compile the Special

Studies Zone on the Mt. Wilson Quadrangle. They are:

Buwalda, J.P. , i 91,0, Geology of the Raymond Basin: Unpublished report for Pasadena Water Department, 131 p., 3 maps.

Hill, R.L., and Sprat.Le, E.C., Santa Monica-Raymond Hill Fault Zone Study, Los Angeles County, California: California Division of Mines and Geology work in progress, December 1976.

Proctor, R.J., 1974, Preliminary map of geological features along the Raymond Hill Fault, in Byer, J.W., Field Trip Guidehook--Sycamore Canyon }'ault, Verdugo Fault, York Boulevard Fault, Raymond fault, and Sierra Madre Fault Zone, September 27, 1975: Association of Engineering Geologists, follows p. 24 (Modified by R.J. Proctor, 1976).

During our earlier fault investigation, we learned from Mr. R.

J. Proctor, then at the Metropolitan Water District, that the fault

locations at this site were taken from Buwalda (1940). Buwalda de-

scribes the area of Santa Anita Park west of the Baldwin Ranch (now the

L.A. Arboretum) as follows:

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E-82112 Page 7

For a half mile to the east the fault is clearly double. The main trace goes from the south edge of the hill west of the lake to the south edge of the hill a half mile east of it; it is indicated on the ground by the northeastward diversion of the drainage channel issuing from the lake, by a depression following the trace, and by a break in profile south of the old winery. Some 400 feet north of this straight trace is a rather steep scarp the plan of which is cuspate and concave toward the south.

The unpublished U.S.G.S. report shows an exposure of the cuspate

trace was found along Baldwin Avenue. Our previous investigation failed

to locate either of the two traces as shown by Buwalda.

. During our previous fault investigation in an adjacent area of

Santa Anita Park, we learned that Buwalda (1940) located the two strands

of the fault based on the breaks in slope in this area. Our previous

investigation revealed that the slope leading from Baldwin Avenue to

Gate 7 was covered with more than 17 feet of trash fill dating before

1932. Buwalda's report was published in 1940, and therefore probably

included at least part of the trash fill slope in establishing the fault

locations.

CHOICE OF EXPJ,ORATION METHOD

Our review of available data and previous investigations led us

to use a series of borings as the method most likely to establish the

presence or absence of faulting in the area of the proposed additions.

l) Geophysical methods were not chosen because the Raymond Fault is not characterized by a strong gravity gradient, and is underlain by alluvium containing perched water. The perched water table would interfere with the use of seismic refraction techniques.

I

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E-82112 Page 8

2) Airphoto interpretation was not used because previous work at the site showed that t.he site has been regraded and filled several times, with known fill dated before 1932.

3) Our previous fault investig.nion, which used trenching, failed to find either strand of the fault, mainly because of the deep trash fill. The. present building area was known to contain about 10 feet of fill. Because boring logs are also available for other work we have performed in adjacent areas of the race track, relevant parts of this data could be used in extending correlations outside of the area to be developed.

GEOLOGIC INVESTIGATION ----····~ ~~-·--

The site was investigated using two lines of borings drilled

with a 20 inch bucket auger drill rig as shown on Plate 2, Plot Plan.

The borings ranged in depth from 20 to 50 feet, as indicated on Plates

3, 4 and 5, Boring Log Cross Sections. The materials encountered were

visually classified according to the Unified Soil Classification System

presented on Plate 6, and representative small bag samples were taken to

aid in correlation. Water was encountered in all of the borings, and in

some borings, the saturated sediments caved or could not be held in the

bucket.

The holes were initially spaced 50 feet apart. Additional holes

were drilled between the initial locations to clarify the correhlions

along part of the section. Boring logs from previous investigations

were used to establish correlations beyond the main line of boriogs.

The second line of four borings was used to investigate the lack of

correlation between Boring 3 and 4. Borings 7 and 8 were terminated due

to caving. No additional borings between 6 and 9 were drilled because

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E-82112 Page 9

of the underground utilities and because the major horizons between

Boring8 6 and 9 appear to correlate.

GEOLOGIC INTERPRETATION

The borings encountered a depositional series of pond and stream

deposits toverecl by one or two layers of artificial fill. As shown on

Plates 3, 4 and S, the major divisions and some individual horizons can

be traced across the area, indicating that no faulting is present in

this a:rea.

GEOLOGIC MATERIALS ' -

· The materials encountered represent three depositional environ-

ments: artificial fill, pond and stream. They include four episodes of

deposition and two episodes of artificial filling.

The depositional environments can be distinguished on the basis

of color, grain size, and sorting, and in some cases by type of mated al.

The ages of the material can be differentiated by degree of weathering

in conjunction with stratigraphic position.

Artificial Fill - The fill materials consisted of dark brown to

reddish-brown silty sand with pieces of asphalt, wire, or other evidence

of recent origin. Beneath the dark brown fill, an older layer of fill

was sometimes found. The older fill was generally lighter and sandier,

and could be distinguished from the natural materials only when it

contained small pieces of asphalt.

Pond Deposits - These deposits generally consisted of very fine

sands, silt, clay and peat, generally dark grey, black, blue or blue-

II

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I ]

~

J ~

I I I J

I I J

J

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E-82112 Page 10

grey. The colors were probably d~e to deposition under reducing condi

tions in the presence of decaying vegetation. The pond was probably

formed as a depression related to nearby faulting and is herein inter

preted as a sag-pond.

Stream Deposits - These deposits consisted of light brown, tan

or light reddish-brown cobbly or gravelly sand and silts. The colors

were produced under oxidizing conditions. In Boring 10 and perhaps

Boring 2, a possible soil horizon was found consisting of reddish-black

sandy clay. These deposits tended to be in thinner beds than the pond

deposits. In addition, these deposits tended to have much free water

associated with them.

GEOLOGIC HISTORY

Boring 9 penetrated a representative section of materials, and

can be used as a key to the geologic history of the site. The oldest

materials encountered were highly decomposed stream deposits, probably

laid down by Arcadia Wash or its ancestor. These deposits consisted of

silts, sands and gravels. The gravels consisted mainly of granitic or

gnessic clasts that had completely weathered to silt and sand. An

occasional quartzite cobble, howevei:, would be fresh and hard. This

material probably predates the faulting episode that created the sag

pond in this area. This material is herein termed the "even older

alluviation episode", Qal4

.

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E-82112 Page 11

The Qal4 is overlain by a,pond sequence consisting of black

clay, peat and silt, with coarse reddish stream channel deposits cover

ing it. This sequence represents the filling of the sag-pond. This

depositional event is herein called the "older alluviation episode",

Qal3 .

The Qal3 is overlain by another pond sequence, consisting of

black clays and blue silts. It represents either refilling of the pond

as the soft sediments compressed, or another. period of downfaulting.

This is termed the "intermediate alluviation episode", Qal2 •

The Qal2 at Boring 9 is overlain by reddish-silty sand stream

deposits and then by recent pond deposits. These pon,d deposits consist

of black and grey silt and peaty clay. Because these deposits are

immediately overlain by artificial fill, they are the most recently

deposited of the sequence, They represent the most recent pond-filling

event. They are called "youngest alluviation episode", Qal1

.

To the southwest, the five-foot stream deposit within the Qal1

at fioring 9 becomes thicker and coarser, until at Boring 3 it is 15 feet

thick, and can be seen to have cut down through most of the Qal2

• This

channeling event, then, and not faulting, has caused the lack of correla

tion between the Qal2 in Boring 3 and the adjacent borings. The Qal3

-

Qa14 horizon is not displaced by faulting. Section B-B', (Plate 4) to

the east, also indicat<'S that these materials are not faulted. The

stream deposits are thicker to the south of the site as shown on Plate S.

I

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E-82112 Page 12

To the northeast of Boring 9, the Qal1

pond deposits can be

traced through Boring 10 to previous boring 100 feet north of Boring 10

(Boring 5 of our Job No. A-77124). The continuity of this horizon

indicates that it has not been affected by faulting. However, the Qal

unit beneath the Qal1

in previous Boring 5 more closely resembles the

stream deposits in Qal3 than the pond deposits of Qal2 , and if it is

Qal3

, then i.t is 16 feet higher than the Qal3

in our present Boring 10.

However, this area is outside the area bein·g investigated.

Age __ ~~~ Correlation

The four alluviation events discernible in the boring logs have

not been dated radiometri.cally, so their absolute ages arc unknown. The

U.S. G .S. Unpublished Report recognizes four major regional alluviation

events and their four events undoubtedly cover a much larger time inter-

val than was observed at this site.

Their estimate of the ages of basinwide alluviation events is as

follows, and is based on soil development, clast weathering and strati-

graphic relationships.

greater than - 200,000 YBP (years before present)

Qal3

200,000 - 11,000 YBP

Qal2 11,000 - 1,000 YBP

Qal 1 1,000 - 0 YBP

Based on their descriptions of the units by degree of clast

weathering, and the units mapped in and aronnd Santa Anita Park, the

I

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. E-82112 Page 13

oldest unit encountered in our borings, the Even Older Alluviation

Episode, probably corresponds with the Qal3 of the U.S.G.S. This cor

relation is based on the highly decomposed clasts, the similarity of

colors and the observed outcrop of Qal3 at the Arboretum to the west.

In Boring 9, the moderately decomposed horizon at 30 to 35 feet from the

surface, may correspond to Qal 2 of the U.S.G.S.

There is no apparent way to distinguish the boundary between Qal

and Qal2 of the U.S.G.S. without radiometric dating. However, at least

some of the materials immediately beneath the fill are Qal1

age.

The age of the faulting indicated between Borings 5 and 6 of our

earlier job No. A-77124, is, therefore, indicated to be very young

because the very youngest organic horizon appears to be offset about

three to five feet if the organic clay (OH) horizon in Boring 6 is of

Qal 1 (U.S.G.S.) age. There is the possibility that the organic clay in

our previous Boring 6 corresponds to the second event in Boring 10,

although the apparent offset would more than double. In any case, the

materials offset are less than 11, 000 years old. This age appears to be

generally consistent with the conclusion of the U.S.G.S. report that

considers the last fault movement on the Raymond Fault to have been

approximately 1,630 ±100 to 2,160 ±105 years BP.

CONCLUSIONS

Fault Rupture Hazard - Based on the correlations between the

borings, we do not find evidence for fault rupture within the planned

construction area. In our opinion, the probability of fault displace

ment during the life of structures on bhis site is low.

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E-82112 Page 14

Locatiq,l,!-~~f_Fault - The m~st probable location for the southern

trace of the Raymond Fault is shown on Plates 2 and 3, between previous

Borings. This position is consistent with removing the effect of the

trash fill slope on the location of the break in slope used by Bowalda.

We recommend a 25-foot setback for the tackrooms in this area.

Site Stability - The deposits beneath the proposed building area

do not appear to have been disturbed by faulting in the last 11,000

years or longer.

Liquefaction - The loose, water saturated sands and silts appear

to be susceptible to liquefaction in the event of a nearby strong earth-

quake. Although this report does not include information for foundation

design, lhe question of liquefaction should- be considered in the design

of foundations in this area.

Limitation of Data

a) Our conclusions are based on inferred continuity of key

horizons and groups of soils from boring to boring, not on continuous

exposure as observed in a trench.

Because of the soil disturbance caused by the bucket auger,

small-seal e features such as those caused by liquefaction were not

observable. Also, shears with very small offset mighl be present between

the borings, )Jut might not be detectable by correlating boring logs.

b) The ages of the depositional episodes are relative, not

absolute, and this could lead to ambiguities in interpretation such as

between new Boring 10 and previous Boring S.

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Page 15

REFERENCES

Association of Engineering Geologists, 1974, Preliminary map of geological features along the Raymond Hill Fault, in Byer, J. W., Field Trip Guidebook--Sycamore Canyon Fault, Verdugo Fault, York Boulevard Fault, Raymond Fault, and Sierra Madre Fault Zone, September 27, 1975, follows p. 24 (Modified by R.J. Proctor, 1976).

Buwalda, John P., "Geology of the Raymond Basin", Report to the Pasadena Water Department, July 1940.

California Department of Public Works, 1934, Geology and Ground Water Storage Capacity of the Valley Fill, Division of Water Resources, Bull. 45, by Roll in Eckis.

California Department of Water Resources, Bulletin 130, Hydrologic Data · Southern California, microfiche.

California Department of Water Resources, Bulletin 104-2, "Planned Utilization of Ground Water Basins - San Gabriel Valley", 1966.

California Department of Water Resources, "Meeting Water Demands in the Raymond Basin Area", Bulletin 104-6, June 1971.

California Division of Mines and Geology, 1973, Preliminary Fault and Geologic Map of California: California Div. of Mines and Geology Preliminary Report 13, scale 1:750,000.

California Division of Mines and Geology, 1975, Bouger Gravity Map of Califonria, Los Angeles Sheet, 1:250,000.

California Division of Mines and Geology, 1976, "Fault Hazard Zones in California, Special Publication 42. Revised March 1980.

California Division of Mines and Geology, 1977, Special Studies· Zones, Mt. Wilson Quadrangle, scale 1: 24, 000.

California Division of Mines and Geology, 1978, "The Raymond Fault: An Urban Geological Investigation: Calif,'?};nia Geology, June 1978, by W.R. Bryant.

California Division of Mines and Geology, 1979, "Earthquake Hazards Associated with Faults in the Greater Los Angeles Metropolitan Area, L.A. County, California", Open Iile Report 79-16 LA.

II!! .. I


E-82112 Page 16

Crandall, LeRoy and Associates, 1977, "Report of Foundati.on Investigation, Proposed Vehicular 'funnel, Santa Anit.• Park, Arcadia, California, for the Los Angeles Turf Club, Inc.", A-77076.

Crandall, LeRoy and Associates, 1977, "Report. of Geologic-Seismic and Fault Rupture Investigation, Proposed Horse Barns, Santa Anita Park, Arcadia California for the Los Angeles Turf Club", E-77124.

Crandall, LeRoy and Associates, 1977, "Report of Soil Investigation, Proposed Horne Barns, Santa Anita Park, Arcadia, California, for the Los Angeles Turf Club", A-77124.

Crandall, LeRoy and Associates, 1982, "Report of Foundation Investigation, Proposed Storm Drain Channel Cover Project, Santa Anita Park, Arcadia, California, for the Los Angeles Turf Club, A-82073.

Envicom, 1974, "Public Safety and Seismic Safety Elements, Technical . Report'', (draft) for the Cities of Alhambra, Arc11dia, DuarLe, El Monte, Monrovia, Monterey Park, Pasadena, San Gabriel, San Marino, Sierra Madre, South Pasadena and Templ" City.

U. S. Geological Survey, 1908, "Ground Water and Irrigation Enterprises in the Foothill Belt, Southern Caliiornia", Wat"r Supply Paper 219.

U. S. Geological Survey, Unpub., "Quaternary Geology and Seismic Hazards of the Sierra Madre and Associated Faults, Western San Gabriel Mountains, Cal.ifornia", by R. Crook, C.R. Allen, B. Kamb, C.11. Payne, and R. J. Proctor, U.S.G.S. Prof. Paper in press.

-oOo-

The following are attached and complet" this report:

Plate 1 -~~~----~~--~-------- Location Map

Plate 2 --~-~--~--~-~-~------ Plot Plan

Plate 3 --------------------- Boring Log Section A-A'

Plate 4 --------------------- Boring Log Section B-B'

Plate 5 --------------------- Boring Log Section c-c·

Plate 6 --------------------- Unified Soil Classification System

I

II

I I I I I

I r

I ""

' . .., I I

c IL

I

•• ·«IQ .. ~-~,-~9 ,-·

-·i>ll --

· ... ,..

~ :1'-' - - -'• ~I 01· .... ~ l 1-·· 1= I

'·' ,1 ' I

Polentielly Ai:tivei raults

REFtll.fNCE MAP EXPL.llNA.TION

Faul~s cons10efed to llave been 4C\ivl;!' dur11''1\,7 Ouaterl'!ary !lme: so!id linl!! v.l'l~'e l:lccuralt'ly !oc;:a.~£>d, long da:;l'l where apo(oximi;ite1y IOC~ted, short d.e:s.h v1here 1n1!:!ira::C:, dotted where col"ICealed, query ('i'} !r'ldicales add111oni:il un. c~r:a1nty Evidence ~~ hi.9toric ol~se: indicated by year of earthQu.akeassoe~ti.!ed €:''W~l'll or C 101 (!1sp1accment c;:aL.:Sl'.!:l'.i by c~e!!!t' ('Ir possible creep

i!i.e~ial pha10 hnearit!'n\'5 U"I01 fi~IO Ch~cked); based on youthlul g~omarphic al"l('l o~her !ea:1,.1res bt-l1eve0' to be- the resullS ot Ouate1~.flry fault1n~

Speeisl Stud(e!I Zon• 9oundsriet.

These are oe11ne.a1ed as s.1ra.1gh1-\1rie segments 111111 i;:onnect encircle~ turning po1nls so a~ to deltrit' ~pec1al s:ud1es zon~ .se~ments.

•

1"1""1•

I HU"''T/"iGTQN t

,I -' !1 " I

..

~.

-

.,.

R()A~ -hse map Stole of Cal lfornla •pee la I s t"'11 es 11ones

i. t--1 • l 1- ••

l'lt. Wi Ison q.uidta.ngle Jan: 1, 1~17.

0 I

1000 I

FEET Se-award pro1ect101i ot zone b0unoary.

LOCATION MAP LeROY CRANDALL ANO ASSOCIATES

PLATE

OVERSIZED -DOCUMENT HAS

BEEN PULLED AND SCANNED WITH THE MAP

FILE.

OVERSIZED -·_. DOCUMENT HAS

BEEN PULLED AND SCANNED WITH THE MAP

FILE.

. . .

I I I

I I

I I I I I I ('<

I· II

l ..., I

0 LL

I

.... ... .... ... z

z 0

... < . > .... .... .....

liilO

"-7D

"-60

1'50

440

li30

0

BOR. II

(liJ5)

10

SatlTH 3 0 • EAST

20

ASi>tlALT

30

BOR. 12

,(476)

FlLL .

1' SM

-·~·:-;)~

40 50 60

~OR.13

(476. 5)'

'5Z ::-::;

FILL SM

SW

70

ASPHALT

?

---------l ML 'l j

h! -i blac!------

'D - ..•

_.ti'°'· ~1!( . -·-

SW decOlllDOS&d

,alluvfiJm

ML black

SW decomposed

•I lwvium

MOllTH 3 0° WEST

80

FILL SM

SM

CAVIMG

90

NOTE: SEE PLATE 6 FOR·EXPLANATION Of

SOIL CLASSIFICATlOM

E X P L A H A T I 0 N

2 - WATER SEEPAGE

F L LL - P IW BAllL Y TWO EP I SOOE S I MC LOOE!t

Qal1 YOUNGEST ALLUYIATJON EPISODE

Qa 12 IKTERH!OIATf AllU.V IATION EPISODE

Qa l 3 - OLDER AllUV !AT I ON EP l SODE

Qal4 - EVEN GLDER ALLUVIATLON EPISOOE

0 10 20

FEET

BORING LOG SECTION 8 - B'

LeROY CRANDALL AND ASSOCIATES

PLATE 4

I I I I

I u

I ~

I w

I 0

I

480

... ..,

... 460 .... z

z: ~so 0

I-

<

"" .., -~ ...

..,.

430

------- 150•

A--h&n BOR.9 (li71)

......

. i-:.;

ASPliALT

A-82073

BOR.7 11i12.sl

-... --:;f,.,:~

:1u ... : FILL -.' ~

22.5'

ASPHALT

A•82.073 BOR.8 (474)

·. ',, ~

''1~· ~I :i. FILL .. -~. -.~

180 ' --------i A-82073

BOR.6 {475)

--~:

~1t1= : i .. '·.

.- ~ -

piei;es of concrete

FILL

_Jl:j FILL : 1:11:

l~~---~~~~~---1~ill~~:~L---~~~-~~---~G=R~~N~0 --1~~-,~~:~~--~s=u=~~A=C~E ____ 2i~~ill N~E: SEE~ME6rnRDP~J~Of ~,'.; Af'PllOX IMATE ·::iH OP.IGUIAL ''."~: SP '. :<. s M SOIL CLASS I Fl CATION

.- .. -._ Qal 1 SM .•.. · SP/SW . •. :tnT-n--- - -- - - - --+-- -

SM

Qol 2 ML

j • - L ..- - CL

. ·.·; SW - - ---=-=-=+-- - -Ffifffril ~.-,~·· ~--c:.--=--_::---- - - - 'I· ML ....-:-..=:--=------ ::..i.;;; -- -

MLM.owil --------1-;:··~-~: ---- ...-- . --·· _..... 1, :·.:.SP -- ;,:·::': SP . .

SP - .. -· Qol3 i ;::: L ___ __. ~: -----

ML b!ue

CAVING

E X P l A N A T I OJ! "_

7 WATER SEEPAGE

Fill - PROBAllLY TWO EPISODES INCLUDED

Qal1 - YOUNGEST AllUVIATION EPISODE

Qalz - INTERMEDIATE ALLUVIATION EPISODE

Qal 3 - OLOER ALLUVIATION EPISODE

0 10 20

FEET .42.0...L ____________________________ ___.:. __________________ -i--

• • SOUTH 10 EAST HORTH 70 WE ST

LOG SECTION C - C'

LaROY CRANDALL ANO ASSOCIATES

- PLATE 5

I I I I I I I I I I I I I I I I I I I \

COARSE GRAINED

SOILS

MAJOR DIVISIONS

GRAVELS WITH FINES

(Appr•e1C1bl11 amt gf fin•*)

)-------- ---->---···· -·· _, ..... -. -

GROUP SYMBOLS

GM

~ GC

SW

TYPICAL NAMES

W91j qraded qra.,,11111, QfO'fll!- !oa'!d m1~lur11a.

l11ttt "' no ftn•$.

PQQrty ~r(ld•d ~c:iv41I$ or 71;1.,..1111- 5-Q:nd m11lL,Lr(ls,

little OI' oo finea.

W1111 9rod11d sond'll, qra'le!ly ~011ds. llffle OI

no fin1t$

(MOf• tkQn ~0"1+ of m(ll41r1QI 1' LAACiE:A than No 200 !Ila¥• !11Zll) CLEAN SANDS ~""""'11-----t ____ -----------------------

(1.i111111 Qr r'tr.> fu'l&t;)

FINE GRAINED

SOILS {MQr• !l'ton ~c % or

rm1111riol 11 SMALLER tf'lcin No, 200 !11t!H•

lllt)

SANDS (Mort1 i'tlon 50 "I. of coor111 froct1on i1 SMALLER fh1J11 ltie Nt;i 4 i.1411141 ;1*t) SANDS

WITH FINES (Appri!!C1obh1 om!.

Of f11'1•~)

SILTS AND CLAYS (l..1Qu1d l1m1! li::SS th-On ~O)

)-------------~ ·-·-

SILTS AND CLAYS {l1qu1d limit GREATER than .50)

SP Poorl'i qro(fed &o0nd$ Of qra1tt1I!)' sand!, 1111111

Or ng f1nti111

j,.,.+,;,;j....--1--- ---· --------- ------------------

SM

ML

~CL OL

lnorvoni~ ;.111$ On4 'flll'Y fin• 1ond1, rQek flour, 1illy or ClaY'9'( tin'I! scnd!I or clayey !1ilf11. w11n !ll!@hf ploa11c1fy.

tnor~Qn1c; c;!Qy,. of lolilj to rn1tdt\JfT\ plg1t1c;1ty,

c;rovl!l!I~ clay:!., :!.Ond)' cloy~, $111)' elayt., :tdn e.!ay:!.

Orqa111c '511f5 arid on;ig111c ~1lty cloj5 af lgw Pl<l!i.hC1I~ .

~~--l- ----- - ·- . ------~--

MH lnorqan1c s11t1, m1caceou!I Oii' d•a1ornaceous fm11 :sgndy or $!/Ty :so11w;, 11Jgi;t1e ,1lt$.

~ CH

~~f---+----------------------OrqQntc;: i;;lg~w; of !T"lltdium to h1~h ploit11;1ty,

0f';IQl111; 11lt, ~ OH .-----·- -------- -- ""-- -----------------il'14hlf-~------'----------------l

HIGHLY ORGANIC SOILS = Pl =

P A R r

7T"T>

Soll! tJ05!195:SlnQ i;;harQ<;lflir1'$lt1;:'$ i:;it 111110 ljlfQUP'I Qrli i:l•$19nql~d by CQl'nb1mlt1on!I of i;iroup !i.ymbl'.lll!

I C L E S I Z E l I M T S

SILT OR Cl..AY SAND GRAVEL ' ' -'"-~7;'··- . ·~-,-0-,0-.-•• -.T1,-.,~-.-.4. ,-__ -:-,·-.~---.. oc-~l __ -~0-. 0-"-,-,-. --ICOtHH. £ S l BOUL0£RS l

~-·-·---

NO.i(JC) N0.40 Nl).10 N0.'4 -.i.'"· ~!ft. !121nl \J, $, STAN CARD S I l E

UNIFIED SOIL CLASSIFICATION SYSTEM

~lllf919flC9 "l'le Un1!1otd :ki1I Cloa:t1t1coi100 S11!4lll'I"!, Cotp~ af

En<;pn1111H1, U S 4t"1J T1tt::rin.c;gl M•moronl'.lum No ,.~~1. 'iiQI I, Mo1cl\, 19~J lf'°lll'ill9d April, 1960)

LEROY CRANDi\L l fl l\ssoc1 ATES

Pl ,, TE fi

Documents

CO, tA 94111 AP- 1455€¦ · 14/05/1982 · 1455 We are pl!lcing on open file the following report, reviewe and approved by the City of Arcadia in compliance with the Alquist-Priolo