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Home My WebLink AboutCT 76-12; CALAVERA HILLS; SOILS REPORT; 1983-07-29• • • • • • • • • • SUPPLEMENTARY GEOTECHNICAL INVESTIGATION CALAVERA HILLS SUBDIVISION CARLSBAD~ CALIFORNIA ~\1b""'l'2- PREPARED FOR: Cesco Development Corporation 110 West "C" Street, Suite 1220 San Diego, California 92101 PREPARED BY: Southern California Soil & Testing, Inc. Post Office Box 20627 6280 Riverdale Street San Diego, California 92120 R.ECEIYmll AUG 291983- CITY Of CARLSBAD ~NGINEERING DEPARTMENT, • • • • • • • • • • • SOU THE R N CAL I FOR N I A SOl LAN 0 T E,S T I 'N 13'. I N-t:. 6280 RIVERDALE ST. SAN DIEGO, CALIF". 92120 • TELE 280-4321 • P.O. BOX 20627 S'AN OIE;GD, CALIF'. 92120 7 4 - B :3 1 VEL lEW A Y PAL M DES E R T. C Ai L I F. 9 2 2 GO· Tit L E :3 4 G - 1 0 7 B G 7 BEN T E R P R I S EST. ESC 0 N DID O. CAL I F. '3 2 0 2 5 • TEL E 74 G .. 4 5 4 4 July 29, 1983 Cesco Development Corporation 110 West, IIC II Street, Suite 1220 San Diego, California 92101 Attention: Mr. Scott Turpin SCS'&T 14112 Report No. 1 SUBJECT: Supplementary Geotechnical Investigation. Calavera Hills Sub- division, Carlsbad, California. Gentlemen: In accordance with your request, we have performed a supplementary geotech- nical investigation for the subject site. The findings and recommenda- tions of our study are presented herewith. If you have any questions regarding this report, or if we may be of fur- ther service, please do not hesitate to contact our office. Respectfully submitted, SOUTHERN CALIFORNIA SOIL & TESTING, INC. (\ I 'h ' )(1 0~ I" ~J )'Yh Daniel B. Adler, Proj~ct Engineer eL&/~ Charles H. Christian, R.C.E. #22330 CHC:CRB:DBA:mw cc: (6) Submitted (1) SCS&T, Escondido ed:/CU~ Cu rt is R. Bu rdett, 'c .E.G ~# 1090 SOUTHERN CALIFORNIA SOIL AND TESTI',NG. INC. • TABLE OF CONTENTS PAGE Introduction and Scope of Service •••••••••••••••••••••••••••••••••••••••• ! • Findings ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2 Genera 1 •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2 Seismic Survey •••••.•••.••••••••••••••.••••••.•••••••.••••.•••••••••• 2 Recommendati ons •••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 4 • Expansive Soils ••••••••••••••••••••••••••••••••••••••••••••••••• 4 Slope Stability ....•.........•.................................. 4 Field Explorations ••••••••••••••••••••••••••••••••••••••••••••••••••••••• 5 Laboratory Testing ••••••••••••••••••••••••••••••••••••••••••••••••••••••• 5 • ATTACHMENTS • Plate 1 Plot Plan Plate 2 Uni fi ed Soil Classification Chart Plate 3-26 Trench Logs Plate 27-28 Seismic Traverses • Plate 29 Rippability Chart Plate 30 Direct Shear Summary Plate 3! Slope Stability Calculations Plate 32 Buttress Detai 1 • Plate 33 Select Fill Cross-Section Plate 51 Typical Canyon Subdrain Cross-Section Plate 52 Slope Stability Calculations Plate 53-54 Surficial Slope Stability • Plate 55 Select Fill Area Cross-Section APPENDIX • Recommended Grading Specifications and Special Provisions • • • • • '. • • • • • • • SOUTHERN CALIFORNIA SOIL AND TESTING, INC;. 6280 RIVERDALE ST. SAN DIEGO, CALIF. 92120 • TELE 280-4321 • P.O. BOX 20627 SAN DIEGO. CALIF. 921~O 74-831 VELIE WAY PALM DESERT, CALIF. 92260' TELE 346-·107·S 6 7 8 E N T E R P R I S EST. ESC 0 N DID 0, CAL I F. 9 2 0 2 5 • TEL E 7 4 6 -4 5 4 4 SUPPLEMENTARY GEOTECHNICAL INVESTIGATION CALAVERA HILLS, SUBDIVISION CARLSBAD, CALIFORNIA INTRODUCTION AND SCOPE OF SERVICE This investigation was performed to provide additional geotechnical infor- mati on regardi ng specifi c areas of the project and its intent was to supplement our January 6, 1983 IIReport of Prelimi.nary Geotechnical trives- tigation for the Calavera Hills Subdivision, Areas El, E2, H, I, K and P through Z211. The additional areas of concern were determined after re~iew~ ing a set of preliminary development plans. prepared by Da·le Naegle FAIA, dated June 1983. In addition, a seismic ~urvey 'was performed on areas designated by the client. The scope of our supplementary investigation consisted of: surface recon- naissance; seismic refraction survey, subsurface explorati:ons, obtaining representative disturbed and undisturbed samples; laboratory testing,; analysiS of the field and laboratory data; and preparat;ion of this report. Specifically, the intent of this analysis was to: a) Explore the subsurface conditions to the ctepths influenced by the proposed construction. SOUTHERN CALIFORNIA SOIL AND TESTING, I.N C. • • • • • • • • • • • SCS&T 14112 July 29, 1983 Page 2 b) Evaluate the rippability characteristics of metavolcanic and granitic rock underlying key areas designated by the client. c) Provide design information regarding the stability of cut and fill slopes proposed for Villages H and I. FINDINGS GENERAL The additional field explorations were concentrated in Villages H, I and the central-western section of Village X. Soils encountered in Villages H and I consisted of Santiago Formation deposits and minor terrace and older alluvium deposits. The Santiago Formation soils consist of silty sands randomly interbedded with c1 aystones and si 1 tstones, parti cul arly above e 1 evat ion 250t feet MSL. The terrace and 01 der a lluvi urn deposits are minor and consist of sandy clays and clayey sands. The intent of the trenches extended in Vi 11 age X was to further defi ne the contact between the alluvium and the underlying rock in an area where deep cuts were anticipated. The contact was found to be farther south than previously thought. Therefore, blasting wi 11 be necessary to construct the proposed cut slopes. SEISMIC SURVEY In general, the additional seismic traverses confirm the fin,dings of our previous seismic survey. Areas predominantly underlain by metavolcanic rock presented nonrippable material at shallow depths (shalJowest at three feet), whereas nonrippable material in areas underlain by predominant granitic rock was encountered deeper (shallowest at 11 feet). A variable zone of marginally rippable rock usually exists between the rippable and nonrippable rock. In this survey, this zone ranged from Jt feet to at SOUTHERN CALIF"ORNIA SOIL AND TESTING. INC. • • • • • • • • • • • 5CS&T 14112 July 29, 1983 Page 3 least 25t feet in the metavolcanic rock and 5t feet to 1st feet in the granitic rock. The exception to our previous findings ,was 5T 19 in which a deep layer at least 25 feet deep of marginally rippable material w'as encountered in an area underlain by metavolcanic rock. A sumrnmary of our seismic traverses is presented herein and on Plates Numbers 27 and 28. The interpretation is based on the rippability chart provided on Plate Number 29. The second letters of each seismic traverse number i dent Hy the ; ndi vi dua 1 vi 11 age where the tra verse was performed (i.e. ST is in Village T). -Seismic Traverse Rock Type Rippable Marginally Rippable Nonrippable 5T 18 Paleosol 0-2' + 2' 5T 19 Jmv/Kgr 0-13' 13-25 ' 5T 20 Jmv/Kgr 0-31 + 31 ST 21 Kgr /Jmv 0-16' + 16' ST 22 Kgr /Jmv 0-81 8-14' +141 5T 23 Kgr /Jmv 0-6' + 61 SR 24 Kgr /Jmv 0-11 1 11-18 1 +18 1 5T 25 Jmv/Kgr 0-41 4-25' ST 26 Jmv/Kgr 0-5' 5-14 1 +14' SP 27 Jmv/Kgr 0-4' + 4' 5P 28 Jmv/Kgr 0-3' 3-25' SP 29 Jmv/Kgr 0-4' 4-8' + 8' 5P 30 Jmv/Kgr 0-51 + 5' SP 31 Jmv /Kgr 0-3' 3-91 + 91 SP 32 Jmv/Kgr 0-4' + 41 SK 33 Kgr/Jmv 0-5' 5-111 +11' 5P 34 Kgr /Jmv 0-12' + 12' Jmv = Metavolcanic Rock Kgr = Granitic Rock SOUTHERN CALIFORNIA SOIL ANO TESTING. INC. • • SCS&T 14112 July 29, 1983 Page 4 RECOMMENDATIONS 1) EXPANSIVE SOILS: It is anticipated that isolated areas of expansive soils may be encountered within three feet of finish grade in Villages Hand 1. It is recommended that in areas to recei ve structu res sai d • soils be undercut to a depth of three feet and replaced with properly compacted, nondetrimentally expansive fill soils. In areas to receive streets and paved parking, soils should be undercut to a depth of one foot. It is our opinion that the extent of the undercutting will not • be 1 arge. • • • • • • 2) SLOPE STABILITY: Abundant and random 1 enses of cl aystones and si 1 t- stones were. encountered in the area of Vi 11 ages H and I where cut slopes with a maximum height of 45 feet are anticipated. The follow- ing table provides maximum heights for different cut slope inclina- tions. It is our opinion that these slopes will poss.ess a factor of safety of at least 1.5 with respect to deep seated rotationa.l failure (see Plate Number 31). Cut Slope Inclination (Horizontal to Vertical) 2:1 1. 75: 1 1.5: 1 Maximum Allowable Height (Feet) 45 .v 35 v' 25 ,/ It is further our opinion that a 1.5:1 slope with a height" of 45 feet may be constructed if buttressed as described on Plate Number 32. It is our opinion that fill slopes constructed at an inclination of 2: 1 wi 11 possess a factor of safety of at 1 east 1. 5 with respect to deep seated fai 1 ure (see Pl ate Numer 31) to a hei ght of at least 70· feet. However, due to the presence of relatively weaker claystones and si ltstones on the anciti pated fi 11 soil s it is recommended that SOUTHERN CAL I F" 0 R N I A 5 OIL AND T EST 1 N G.I N C. • • • • • • • .' • • • SCS&T 14112 July 29, 1983 Page 5 fill slopes higher than 70 feet be constructed with select material at the bottom section of the slope. The upper 70 feet of slope may be construc- ted with a mix of silty sand with minor claystones and 'siltstones (see Plate Number 33). FIELD EXPLORATIONS Twenty-six subsurface explorations were made at the locations indicated on the attached Plate Number 1 on July 11 and 18, 1983. These explorations consisted of trenches excavated utilizing a rubber-tired backhoe equipped with a 24-inch bucket. In addition, 17 seismic traverse lines were per- formed. The field work was conducted under the observation of our engi- neering geology personnel. The explorations were carefully logged when made. These logs are pre- sented on the following Plate Numbers 3 through 26. The soils are des- cribed in accordance with the Unified Soils Classification System as illustrated on the attached simplified chart on Plate 2. In addition, a verbal textural description, the wet color, the apparent moisture, and the density or consistency are given on the logs. Soil densities for granular soils are given as either very loose, loose, medium dens~, dense, or very dense. The consistency of silts or clays is given as either very soft, soft, medium stiff, stiff, very stiff, or hard. Disturbed and undisturbed samples of typical and representative soils were obtained and returned to the laboratory for testing. The results of our seismic traverse lines are presented in Plates Numbers 27,28 and 29. LABORATORY TESTING Laboratory tests were performed in accordance with the genera 11y accepted American Society for Testing and Materials (A.S.T.~l.) test methods or SOUTHERN CALIFORNIA SOIL ANO TESTING. INC. • • • • SCS&T 14112 July 29, 1983 Page 6 suggested procedures. A brief description of the tests performed are presented below: a) MOISTURE-DENSITY: Field moisture content and dry density were determined for representative undisturbed samples nbtained. This information was an aid to classification and permitted recogni- tion of variations in material consistency with depth. The dry unit weight is determined in pounds per cubic foot, and the field moi stu re content is determi ned as a percentage of the s'oi l' s dry weight. The results are summarized in the trench logs. b) CLASSIFICATION: Field classifications were verified in the laboratory by visual examination. The final soil classifications 4t are in accordance with the Unified Soil Classi!ication System. c) DIRECT SHEAR TESTS: Direct shear tests were performed to deter- mine the failure envelope based on yield shear strength. The '. shear box was designed to accomodate a sample having a d,iameter of 2.375 inches or 2.50 inches and a height of 1.0 inch. Samples were tested at different vertical loads and at saturated moisture content. The shear stress was applied at a constant rate of • .. • • • strain of approximately 0.05 inches per minute. The results of these tests are presented on attached Pl ate Number' 30 • SOUTHERN CALIFORNIA SOIL ANO TESTING. INC. • • • • • '. • • • • • SUBSURFACE EXPLORATION LEGENO UNIFIED SOIL CLASSIFICATION CHART SOIL DESCRIPTION GROUP SYMBOL TYPICAL NA...'!ES 1. COARSE GRAINED, More than half of material is larger than No. 200 sieve size. GRAVELS CLEAN GRAVELS GW More than half of coarse fraction is larger than No. 4 OP sieve size but smaller than 3". GRAVELS WITH FINES GM (Appreciable amount of fines) GC SA...'tDS CLEAN SANDS SW ~than half of coarse fraction is SP smaller than No. 4 sieve size. SANDS WITH FINES SI'! (Appreciable amount of fines) SC 11. FINE GRAINED, More than half of material is smaller than No. 200 sieve size. SILTS AND CLAYS Liquid Limit less than 50 SILTS A...'tD CLAYS Liquid Limit greater than 50 HIGHLY ORGANIC ML CL OL MH CH OH SOILS PT Well graded gravels, gravel- sand mixtures, little or no fines. poorly graded gravels, gravel sand ~ixtures, little or no fines. Silty gravels, poorly graded gravel-sand-silt mixtures. Clayey gravels, poorly graded gravel-sand, clay mixtures. well graded sand,gravelly sands. little or no fines. Poorly graded sands,gravelly sands. little or no fines. Silty sands, poorly graded sand and silt mixtures. Clayey sands. poorly graded sand and clay mixtures. Inorganic silts and ve~1 fine sands, rock flour, sandy silt or clayey-siLt-sand mixtures with slight plast- icity Inorganic clays of low to medi~~ plasticity. gravelly clays. sandy clays,silty clays, lean clays. Organic silts and organic silty clays of low plastici~y Inorganic silts. micaceous or diatomaceous fine sandy or silty soils, elastic silts. Inorganic clays of high plasticity, fat clays. organic clays of.medium to high plasticity. Peat and other highly organic soils . .f -\~ater level at time of ex:avat~on or as indicated US -Undisturbed, driven ring CV I" -Undisturbed chunk sample BG -Bulk sample SQUTHERN CALIFORNIA SOIL & TESTING. INC. .1I.e "'IV_ROAL_ .TR •• T .AN Ol.GO, CALI .. ORNIA .111&10 sample or tube sample CALAVERA HILLS BY DATE CRB JOB NO. 1'-18-83 14112 Plate No.2 • z '#. w 0 TRENCH NUMBER TI-54 >->->- a. l- I-W I-U l-'#. z >-z a: z z I--W W 0 .... l-e( W W en a: -() ~ w en > -...J a: I-z ::::l I--... w --ELEVATION I-a: Z - J: 0 u. c( en c( en w w -I-Z I-U I-...J -Cl. -.-Q CJ en w c( c( a. en en Cl. en Q 0-i- a. ~ en Cl. 0 a. 0 ...I' Cl. W e( c( :::E c( Z a: >-z ~:::E 0 c( 0 0 a: :::E 0 en ...J U Q 0 () DESCRIPTION U U • 0 ~LCH DARK GRAY SILTY CLAY MOIST STIFF (TOPSOIL) - 1 . -• -- 2 _ - -. 3 -SCCL GREEN BROWN SANDY CLAY/ MOIST MEDIUM ...;, CLAYEY SAND DENSE • 4 SM BUFF WITH GREEN TINT SILTY MOIST DENSE ---SAND (SANTIAGO FORMATION) 5 _ -• CK - 6 _ - -- ? --• --8 _ -. -- 9 • TRENCH ENDED AT 91 ---------• --------. • ---.. -. - • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG LOGGED BY: CRB DATE LOGGED:? 11 SOIL & TESTING,INC. --83 JOB NUMBE'R: 14112 Pl i'ltp .Nn~ • • z *' w 0 TRENCH NUMBER TI-55 >->->-- 0. l- I-W I-(,) l-I-*' Z ~ >-z a: z Z -w w 0 -I-et W :::l w w en en cC > --...J (.) Z l-I---a: I-a: I-Z -::l - ::x: w 0 u. ELEVATION 0( en en w -I-Z I-(.) ...J -0( -w Q (,) en w 0( c( I-en 0. 0. Q 0. en 0 en c. I-...J 0. 0. ~ en 0. 0. 0 :E Z a: >-z w :E w 0( et 0( 0( 0 a: :E 0 0 a: Q en ...J Q 0 (.) DESCRIPTION (.) (,) (,) • 0 -CLCH DARK GRAY SILTY CLAY MOIST STIFF -(TOPSOIL) -" • 1 --- 2 -- SCCL GREEN BROWN SANDY CLAY/ MOIST MEDIUM 3 -CLAYEY SAND DENSE -• SM BUFF WITH GREEN TINT SILTY MOIST DENSE 4-SAND (SANTIAGO FORMATION) - -- 5 -- ...,-• - 6 -- -- 7 CL GREEN BROWN SILTY CLAY MOIST HARD -• - 8 _ ...... -" - 9_ - -: • - 10 TRENCH ENDED AT 10' ------• --, ----------" -• ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG SOIL & TESTING,INC. LOGGED BY: r.RR DATE LOGGED:7_11_A1 "," JOB NUMBER: 14112 Pl ate No 4" • • z *- w 0 >- TRENCH NUMBER TI-56 >->-- ll. l- I-W I-(,) l-I-*-Z >-z a: Z z -w -w 0 .. l-e( W W en a: :> -() :::::I w en - -..J -a: I-a: I-z z -:::::I I--l- X W 0 u. ELEVATION e( en w -I-Z I-(,) ..J -en < -W 0 (J (J) W < < l-ll. en en ll. a.. en 0 0. a.. ll. 0 I-..J Q. ~ en a.. 0 w < ~ z a: >-z w ~ 0 c( e( < 0 0 a: ~ 0 a: Ci CJ') ..J () 0 () DESCRIPTION () (,) • 0 -CLCH DARK GRAY SILTY CLAY MOIST STIFF (TOPSOIL) \ - 1 --• -- 2 -- 3 SC YELLOW BROWN CLAY~Y SAND MOIST MEDIUM ~ DENSE ,... " • - 4_ SM BUFF TO LIGHT BROWN SILTY MOIST DENSE SAND (SANTIAGO FORMATION) """ -- 5_ -• -- 6_ - CK -- ? --• -- 8_ - -- 9 • TRENCH ENDED AT 91 -' --------• --------• -----. ,-• ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG SOIL & TESTING,'NC. LOGGED BY: CRB DATE LOGGED:? 1 -1-83 JOB NUMBER: 14112 Plate No. 5 • • z *- w 0 TRENCH NUMBER TI-57 >->->- a.. f- f-W f-U f-f-*-Z -; >-< z a: z· z -w -w 0 -f-W W (f) a: -u ;:) w (f) > -...J -a: f-a: f-z Z ;:) f--f- w -ELEVATION (f) w ..,. f-Z f-U· :x: 0 LI. < (f) <C UJ ..J -c.. -Q u (f) UJ <C <C f-a.. C/) C/) 0 c.. (f) a a. '"" ..J a.. ~ C/) c.. c.. -0 c.. w < ~ <C Z a: >-z UJ ~ < < 0 0 a: ~ 0 a: a ..J a o . C/) u u u DESCRIPTION U 0 • CL DARK GRAY & DARK BROWN SILTY MOIST STIFF ---CLAY 1 _ .- • -- 2_ -- 3_ GM RED BROWN SILTY SANDY GRAVEL MOIST DENSE TO (TERRACE DEPOSITS) VERY - -DENSE -• 4_ -. 5_ ML LIGHT GRAY SANDY SILT MOIST HARD CK (SANTIAGO FORMATION) - -• - 6 _ .- --' -7 • -TRENCH ENDED AT 71 - ---. --. -• .....; -_. - ""'"' - -". -....., • -..;... -'-----• ------ I. , ~ SUBSURFACE EXPLORATION LOG SOUTHERN CALIFORNIA LOGGED BY: CRB DATE LOGGED; 1 83 SOIL & TESTING,INC. 7-1 - JOB NUMBER: 14112 Pl~tp Nn h • • z w 0 TRENCH NUMBER TI-58 >-*' 0.. ~ W U >->-- --: >-~ ~ ~ *' z -< Z IX: Z Z ~ -w ~ --w -..J U W :::I w C/) IX: 0 -w C/) > - ::t: W u.. ELEVATION IX: ~ IX: ~ Z Z -::::I ~ -~ ~ ..J 0 -< C/) C/) W W -'~ Z ~ U 0.. (J) (J) 0.. < Q (,) W 0.. 0.. C C/) < < ::2: (J) Q. 0 C/) 0. ..,:. ..J UJ < < < ::2: Q. Z >-0 Q. 0 < IX: Z w 2: C/) ..J 0 0 a:: ::2: 0 IX: u DESCRIPTION u 0 u 0 U • 0 -CLt H DARK GRAY SILTY CLAY MOIST STIFF (TOPSOIL) - ..,;..' 1 -• -- 2-- -- 3 --'. 4_ CL GREEN BROWN SILTY CLAY MOIST HARD (SANTIAGO FORMATION) -, -- 5 _ , -• -- 6 _ ---, -BAG 7_ --• -- 8_ -' ...... - 9_ - -• - 10 _ - -- 11 --...-• ..., 12 TRENCH ENDED AT 121 -----• ---- -' • ' ' ~ SUBSURFACE SOUTHERN CALIFORNIA EXPLORATION LOG SOIL & TESTING,INC. LOGGED BY: eRB DATE LOGGED: ~l -7-1' -R1 JOB NUMBER: 14112 Plate No. 7 • z *- w 0 TRENCH NUMBER TI-59 >->->-- c.. I-W I-U l-I-*-Z -: >-I-Z ex: z z -w w 0 -' ~ <t W ;:) W w en en ex: > -...I () ex: I-z ;:) l-I---I-ex: z :;: .,;. w ELEVATION en w I-Z U J: 0 u.. <t en '" w ...I -Q (J en w '" '" ~ en Q. c.. Q Q. c.. en 0 en I-...I Q. c.. Q. Q. -0 ::IE en ::E z ex: >-z w ::E w <t <t < 0 ex: ::E ex: Q '" 0 0 0 en ...I () Q U () DESCRIPTION () • 0 -CLCH DARK GRAY SILTY CLAY MOIST STIFF - 1 --• -- 2-- -- 3 • CL GREEN BROWN SILTY CLAY WITH MOIST VERY --CALICHE & SILKENSIDES STIFF .4 _ (SANTIAGO FORMATION) - 5_ SM& INTERBEDED LIGHT GRAY & MOIST DENSE ML LIGHT GREEN BROWN SILTY SAND - -& SANDY SILT -• 6 _ CK _. --7 _ BAG -• -- 8_ - -- 9_ ---• - 10 TRENCH ENDED AT 10' -----• ---...;... ----: • -"---- • .. ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORAT ION LOG LOGGEO BY: CRB DATE LOGGEO: j. SOIL & TESTING,INC. 7-1 -83 JOB NUMBER: 14112 Plate No. 8 • • z ~ UJ 0 TRENCH NUMBER TI-60 > > > - Q. I-W I-(J l-*-Z -: > ... z a: z z I--W W 0 -... <t W ::l W W en en a: > u Z l-I---..J -a: I-a: I-z -;:) - UJ -ELEVATION en w -I-Z I-(J J: 0 u. <t en c( w ..J -Q (,) en w c( c( ... C/) Q. a. 0 a. a. C/) 0 en ... ..J CI. a. :E en a. CI. 0 :e z a: > z w :e UJ <t c( 0 <t <t 0 0 a: :e 0 a: 0 (/'J ..J (J Q-(J (J DESCRIPTION (.) • 0 CL DARK BROWN SILTY CLAY MOIST STIFF --(TOPSOIL) -1 -• ---2--- 3 • SC YELLOW BROWN CLAYEY SAND MOIST MEDIUM -DENSE 4- SM BUFF SILTY SAND (SANTIAGO MOIST DENSE --FORMATION) ..... 5-• -- 6-- CK -- 7_ -• -- 8_ - -- 9 -TRENCH ENDED AT 91 -• -------• ------- ..". • ---...,.. - • ~ SOUTH ERN CALIFORNIA . SUBSURFACE EXPLORATION LOG LOGGED BY: DATE LOGGED: 7.1 SOIL & TESTING,INC. CRB . -;l-A':! JOB NUMBER: 14112 Plate No.9 • • z w 0 TRENCH NUMBER TI-6l >-*- Q. >->- ~ >-l- I-w I-U I-- -I-<I: Z a: z z I--W *-Z -'w w 0 -:: () :::I W W (J) (J) a: w ELEVATION a: I-Z I-> - J: 0 u. I-a: Z -:::I -l- I--I -<I: (J) (J) w ... I-Z 'I-U Q. (J) <I: W u Q. (J) Q. Q. 0 0 (J) w <I: 00( ~ en Q. 0 (J) 0- W <I: ~ Q. Z -0 I--I Q. 0 <I: <I: 00( a: >-z w ~ en -I 0 0 a: ::I 0 a: () DESCRIPTION u 0 0 U () • 0 CL DARK BROWN SILTY CLAY MOIST STIFF --(TOPSOIL) -1 -• -- 2 SM BUFF SILTY SAND, MOIST DENSE --(SANTIAGO FORMATION) -3 -• -- '4 --BAG 5 -• -- 6_ '- -- 7 • TRENCH ENDED AT 71 ---------• : ------. --' • ---------• ---. --. - • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION L:OG SOIL & TESTING,INe. LOGGED BY: CRB DATE LOGG ED: 7 . , .l -,.-83 JOB NUMBER: 14112 Plate No. 10 • • z w 0 TRENCH NUMBER TI-62 > *- c. ... () > > -... UJ ... -: > Z ... ... *-z -... <I: a: z z --UJ .,... w 0 -u UJ CI) -:: ::::I w UJ CI) a: > w ELEVATION a: ... ... Z ... J: 0 u. a: z -::J -... ...J -< CI) <I: CI) UJ W .... ... Z ... () ... c. CI) c. 0 (J c. CI) c. 0 CI) UJ: <I: < ~ CI) c. 0 CI) 0. C. ... ...J C. ,W <I: < ~ Z > 0 ~ < < a: z w ::E CI) ...J 0 0 a: ~ 0 a: u DESCRIPTION u 0 () 0 U • 0 CH DARK GRAY SILTY CLAY MOIST STIFF --(TOPSOIL) 1 -- -- 2-- -- 3_ -• 4_ CL GREEN BROWN SILTY CLAY MOIST VERY (SANTIAGO FORMATION) STIFF - -- 5_ ----• HARD --- 6_ - -- 7_ ,--• -- 8_ - -- 9--• -- 10 _ - -- 11 -" --• - 12 TRENCH ENDED AT 121 ..., ----• --j' , --- • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLOR'ATION LOG SOIL & TESTING,INC. LOGGED BY: CRB DATE LOGGf;D: 7 1 -1 ,:-83 JOB NUMBE'R: 14112 Plate No., 11 • • z * w 0 TRENCH NUMBERTI-63 >->->-.,... 0.. I-U - I- W l-I-* z· -: >-Z Z I--W W « a: z 0 -I-W W en a: -u ::l w en > - -= -a: I-a: I-z z -::l I--I- J: w u. ELEVATION « en w -I-Z I-0 ...J 0 -en « -w Q 0 W « c( I-0.. en 0.. 0.. Q Co en 0.. en 0.. 0 en i-...J 0.. ::E en ::E 0.. Z a: >-0 Z w ::E w « « « « a: ::E Q 0 0 0 a: en ...J U Q 0 u DESCRIPTION U U • 0 CH DARK GRAY SILTY CLAY MOIST STIFF --(TOPSOIL) 1 -- • -- ·2--- -- 3_ -• -- 4 CL GREEN BROWN & YELLOW SILT MOIST STIFF --(SANTIAGO FORMATION) 5_ -• -- 6 ML LIGHT GRAY SANDY SILT MOIST VERY -(SANTIAGO FORMATION) STIFF - 7_ ----• HARD -- 8_ -. . ....,. - 9 • TRENCH ENDED AT 9' ....,. --------• ---....,. -_. --• --., --- • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG SOIL & TESTING,INC. LOGGED BY: CRB DATE LOGGED: 7 11 ~ -83 JOB NUMBER: 14112 Plate No. 12 • • z il'!. w 0 TRENCH NUMBER TI-64 > > > - a. l- I-UJ I-() I-il'!. z > z a: z z I--UJ UJ 0 -<I: en a: -I-UJ :;:) UJ UJ en > ...J U Z l-I---a: I-a: I-z -:;:) w -ELEVATION Z l- X 0 u.. <I: en <I: en UJ UJ -I-() ...J -a. Q (J en UJ <I: 0( I-a. I/) a. en Q Q, I/) 0 I-...J a. a. :E a. a. 0 I/) :E z > z UJ 2 w <I: <I: <I: <I: 0 a: a: 2 a: 0 0 0 0 I/) ...J () Q () u DESCRIPTION () • 0 CL DARK BROWN SILTY CLAY MOIST STIFF --(TOPSOIL) -1 - --• 2 _ - -- 3 -SCCL GREEN BROWN SANDY CLAY/ MOIST MEDIUM CLAYEY SAND DENSE -e· 4 SM BUFF WITH GREEN TINT SILTY MOIST DENSE --SAND (SANTIAGO FORMATION) 5 _ -• CK --6 _ ---- 7 _ -• -- 00 8_ - -- 9 • TRENCH ENDED AT 9' ---------' • --------• ----- • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG SOIL & TESTING,INC. LOGGED BY: CRB DATE LOGGED:7_11 _R~ JOB HUMBE'R: 14112 Plate No. 13 • • z - w 0 >->-* T R ENe H N U M BE R TH-65 >-- 0.. I-LIJ I-0 I-* Z -; >-I-Z 0: Z Z I--LIJ LIJ 0 -l-e( LIJ LIJ IJ) 0: -U :::::I LIJ IJ) > -..J -0: I-0: I-Z Z -:::::I l-I- w -ELEVATION z :x: 0 u. .e( IJ) 4( IJ) LIJ LIJ -l-I-0 ..J --Q (,) IJ) LLi « I-0.. IJ) IJ) 0.. 0.. IJ) Q a. 4( 0.. 0.. 0 -I-..J 0.. ::I: IJ) 0.. 0 W 4( ::I: z 0: >-Z LIJ :E 4( e( 4( 0 0: :E Q 0 0 0: 0 (/) ..J 0 Q 0 u DESCRIPTION 0 • 0 CL DARK BROWN SILTY SAND MOIST STIFF --(TOPSOIL) -1 -• -- 2_ --- 3 • SC YELLOW BROWN & GREEN BROWN MOIST MEDIUM --: -CLAYEY SAND 4 SM BUFF TO LIGHT YELLOW BROWN MOIST DENSE --SILTY SAND 5 _ (SANTIAGO FORMATION) -• CK -- 6_ - -- 7_ -•• -- 8 TRENCH ENDED AT 81 -. ----• -_. ------• ---------• ---.,.... .... • -. ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG SOIL & TESTING,INC. LOGGED BY: CRB DATE LOGGED: 7-11.-:-83 JOB NUMBER: 14112 Plate No 14 • • • • • • • • '. • • • ... -:x: .... 0. W a - . 1 - - 2 - 4 _ - 5 _ - 6 7 - 8_ - 9_ - 10 - - - - - - - - - BAG SC IGREEN BROWN CLAYEY SAND SM BUFF SILTY SAND (SANTIAGO FORMATION) TRENCH ENDED AT 10' SOUTHERN CALIFORNIA SOIL & TESTING,INC. MOIST MEDIUM DENSE MOIST DENSE SUBSURFACE EXPLORATION LOG LOGGED BY: CRB DATE LOGGED: ' . 7-lT -83 JOB HUMBER: 14112 P 1 a te No· 1 '1 - - -' - - -. - ,- ..,.. - - - - - - - - - - - - • z w 0 TRENCH > '* a. to-NUMBE R TH-67 !-w U > > - -: > Z !-!-!-'* Z ... !-< a: z z --w -w 0 -() w CI) -...J ;:, W W CI) a: > w -ELEVATION a: !-!-Z ;:, !- J: 0 u.. a: z --!-' ...J -« CI) « CI) w w -!-Z !-U to-(J') a. a. (J') a. a. 0 0 " CI) w « « 0 CI) Q. W ~ (J') a. a. !-...J Il; 0 « < « ~ « z a: > 0 Z w :E (J') ...J 0 0 a: :E 0 a: () DESCRIPTION () 0 U 0 U • 0 -CLC H DARK GRAY SILTY CLAY MOIST STIFF (TOPSOIL) - -1 -, • -- 2-- -- 3 • SC YELLOW BROWN CLAYEY SAND MOIST MEDIUM --DENSE 4 SM BUFF SILTY SAND MOIST DENSE --(SANTIAGO FORMATION) 5_ -• CK -- 6_ - -- 7_ -• -- 8_ -' --- 9 • TRENCH ENDED AT 91 ------------....,. ----• ----- • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LO-G SOIL & TESTING,INC. LOGGED BY: CRB -DATE LOGGED: 7-1r-83. JOB NUMBE'R: 14112 Plate No 16 • • z (jI!. UJ 0 > > > - 0-T R E N C H N U M BE R TH-68 !-w !-U !-!-(jI!. Z > f-Z a: z z -w UJ 0 -f-« w ;:) UJ UJ C/) C/) ex: > --u Z f-'!-. -..J a: !-!-Z -;:) - UJ --ELEVATION, a: C/) w -f-Z f-U J: 0 u. « C/) « w (J ..J -0-0 0 C/) w « « f-' 0-en en 0 0-C/) 0. !-..J Q. Q. ~ C/) Q. Q. Z > 0 w « ~ a: z :e UJ « « 0 a: :e .;r:: 0 « 0 0 0 en ..J U 0 u, u DESCRIPTION 'U • 0 -CL CH DARK GRAY SILTY CLAY MOIST STIFF - (TOPSOIL) -1 -• .... --2 --- 3 SCCL YELLOW BROWN SANDY CLAY/ MOIST MEDIUM . --CLAYEY SAND (WEATHERED OLDER DENSE • 4-ALLUVIUM) ..,.. -- 5 • SC YELLOW BROWN CLAYEY SAND MOIST MEDIUM -BAG (OLDER ALLUVIUM) DENSE 6 - -' - 7 MLCL GRAY CLAYEY SANDY SILT MOIST VERY -(SANTIAGO FORMATION) STIFF --• 8_ -----, , HARD-...., - 9_ -• -- 10 , TRENCH ENDED AT 10' -----• -------.-• -.... --' - • . ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATI'ON LOG LOGGED BY: DATE LOGGED: 1ft SOIL & TESTING,INC. CRB 7-1r -83 JOB NUMBER: 14112 .Plate No 17 • • • • • • • • • • • :t: I-a. UJ o Z ~ ~ TRENCH NUMBER TI-69 ~ <{ ...I (J ELEVATION -~ 0 ~ a. en en ...-___________ --.1 :E en <{ <{ I-W Z a: W :::> a: I- 0( en a. a. 0 "" :E > I--en Z _ W -o ~ > a: o -w ~ a: ::I l- I-Z en W o ~ :E 0 u * z W 0 ~ l- t-u 0( 0( ...I a. W -:e a: 0 U DESCRIPTION O~~--~----~--------------~----~------~----~----+---~ en ...I (J SM BROWN SILTY SAND (TOPSOIL) MOIST - 1 - SCtL BROWN CLAYEY SAND/SANDY CLAY MOIST - LOOSE TO MEDIUM DENSE MEDIUM DENSE - - - - , 3~---4----~----------------------------------+--------+----------~------~'r-------1-------~ CL GREENISH BROWN SILTY CLAY MOIST STIFF - 4~---+_-+_----------------4-------~--------~----~-----r----~ - 5_ _ CK CL& INTERBEDED GREEN BROWN SILTY MOIST ML CLAY & SANDY SILT (SANTIAGO FORMATION) HARD/ DENSE - - 6 -I----+---....j~ _______ ---------1------1-----+--.,..--+------f----.,.... CK - 11 - - SM& INTERBEDED LIGHT GREEN BROWN MOIST MLCL SILTY SAND & SANDY CLAYEY SILT DENSE/ HARD 121.9 14.7 - - - - - - - - - - ...... 12~~--~------------------~----~~----~----t---~----~ TRENCH ENDED AT 12' - - - - - SOUTHERN CALIFORNIA SOIL & TESTING,INC. - - - - ,- SUBSURFACE EXPLORATION LOG LOGGED BY: CRB DATE LOGGED: , 7-1 R-R1 JOB NUMBER: 14112 P1 ate NQ 18 • • • • • • • • • • • ::r: I-0.. W o z ~ ~ T R EN C H N U M BE R TI -70 ~ <I: -oJ ~ ~ 0 U. 0.. ~ ~ ~ ____________________ ~ :l!: ~ <I: <I: ELEVATION I-W Z a: W :::l a: I-<I: CJ) 0.. 0.. 0 <I: :l!: > I- In z _ W -i::l ~ > a: o - W ~ a: :J l- I-Z ~ W o ~ 2 0 (.) * ,Z W 0 > l- I-(.) <I: oil: -oJ 0.. W 2 a: 0 u ~ d DESCRIPTION O~~~~--------------------~------+-------~--~----~----~ --CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF -1 - -- 2-- ---3- 4-CL GREEN BROWN SILTY CLAY MOIST STIFF - -- 5~--+---4-----------------------+-------~------~------~----;-----~ - - - CL& INTERBEDED GREEN BROWN SILTY MOIST ML CLAY & SANDY SILT HARD HARD - - -' - 10 _a..-+__ --l~----_____ ---+----4-----*"---1----4------1 SM& INTERBEDED LIGHT GREEN BROWN MOIST DENSE/ HARD --ML SILTY SAND & SANDY SILT 11_ - - 12~~ __ ~~ ______________ ~~----~----~----~----~--~ TRENCH ENDED AT 121 - - - -- SOUTHERN CALIFORNIA SOIL & TESTING,INC. - - - SUBSURFACE EXPLORATION LOG LOGGED BY: CRB DATE LOGGED:7_1 ~-R1 JOB NUMBER: 14112 Plate No 19 - -,,---.;] • z >-~ UJ 0 TRENCH NUMBER TI-71 () >->-- a. I-w l-I-l-*-Z ~ >-I-Z a: z z -w -w 0 -I-< UJ ::l W UJ r.n r.n a: > --I U a: I-Z Z -::l I--I---I-a: z UJ -ELEVATION r.n w -l-I-() :I: o u.. 001( r.n 001( w (J UJ' < -I a. -Q Q en < I-a. en -a. r.n 0. I--I a. a. en 0. 0 a. -0 ::::e en :E z a: >-z w :E UJ < < < 0 a: :E 0 a: Cl < 0 Q 0 r.n -I U () () u DESCRIPTION • a CL BROWN SIL TV CLAY ''('TOPSOIL) MOIST STIFF '-- 1 -- -' --• 2_ - --- 3 SM BUFF TO LIGHT YELLOW BROWN MOIST MEDIUM -SILTY SAND DENSE -• 4_ (SANTIAGO FORMATION) ---- DENSE -- 5 MLCL GREEN BROWN SILTY CLAY/ MOIST HARD - "" CLAYEY SILT 6 _ • SM& INTERBEDED LIGHT GREEN BROWN MOIST DENSE/ --ML SILTY SAND & SANDY SILT HARD 7 • CL GREEN BROWN & RED BROWN MOIST HARD --SILTY SAND 8_ - 9_ SM& INTERBEDED LIGHT GREEN BROWN MOIST DENSE TO - SILTY SAND & SANDY SILT HARD -• - 10 _ - -- 11 • TRENCH ENDED AT 111 ----------• ---- -i • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG ~. SOIL & TESTING,INC. LOGGED BY: CRB DATE LOGGED:7_1R_A1 ~~ JOB NUMBE'R: Plt=lte No 14112 20 •• • z *' w 0 TRENCH NUMBERTI-72 > > > - 0. I-w I-U l-I-*' Z ~ > I-Z a: z z -w -w 0 .... I-.;: W ::::I W W en en a: > -...J U a: I-,Z ::::I l-I- -I-a: z -w --ELEVATION en w -I-Z I-U J: 0 u.. .;: en 0( w ...J -0. -Q c (,) en w .;: .;: I-0. en en 0 0. en Q. I-...J 0. 0. 0. 0. -0 ~ en .;: ~ z a:' > z w ~ w .;: .;: 0 a: ::E a: c .;: 0 0 0 en ...J U C U U DESCRIPTION U • 0 SM BROWN SILTY SAND (TOPSOIL) MOIST MEDIUM --DENSE 1 -- • CL BROWN SILTY CLAY MOIST STIFF 2_ -, -- 3_ -• -- 4 , CL YELLOW GREEN SILTY CLAY MOIST STIFF --(WEATHERED TERRACE DEPOSITS) ," 5_ -• CK --6 _ - :-- 7 • SM& INTERBEDED LIGHT GREEN BROWN MOIST DENSE/ --ML & BUFF WITH GREEN'TINT SANDY HARD 8_ SILT & SILTY SAND - (SANTIAGO FORMATION) -- 9_ " -• -- 10 _ - ' -- 11 • TRENCH ENDED AT 11' ....: -. -, ------• ---",-- • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION LOG SOIL & TESTING,INC. LOGGED BY: rRR DATE LOGGED:7_1 R-Ri JOB HUMBER: Pl ate No " 14112 21 • z * UJ 0 TRENCH NUMBER TI-73 > > > - Q. l- I-UJ I-CJ l-I-* Z -: > z a: z Z -w w 0 -I-< W ::l W UJ (/) (/) a: > --:: (,) z l-I---a: I-a: I-z -:l - ::I: UJ 0 u. ELEVATION < (/'J (/) w -I-Z I-(,) ..J < W Q (J W < I-(/'J -0.. 0.. 0 (/) < Q. en 0 (/) c. I-...J 0.. Q. ~ en Q. 0.. 0 UJ < ~ z a: > z UJ ~ < < < 0 a: ~ a: 0 0 0 0 (/'J ..J (,) 0 (,) (,) DESCRIPTION (,) • 0 CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF -- 1 -- • --- 2_ - -- 3 -SCtL GREEN BROWN SANDY CLAY/ MOIST MEDIUM -CLAYEY SAND DENSE/ • 4 HARD - -"- 5_ SM& INTERBEDED LIGHT GREEN BROWN MOIST DENSE/ & BUFF WITH GREEN TINT SILTY HARD - -SAND & SANDY SILT -• 6_ (SANTIAGO FORMATION) - CK -- 7_ -• -- 8_ - -- 9_ -• -- 10 _ - -- 11 • TRENCH ENDED AT 11 I --..,.. ------• ----- • ~ SOUTHERN CALIFORNIA SUBS URFAC·E EXPLORATION. LOG LOGGED BY: CRB DATE LOGGED:7 . 1 A. . SOIL & TESTING,INC. --R3 .. JOB NUMBER: Pli'ltp Nn 14112 22 • • z *- w 0 TRENCH NUMBER TH-74 > > > - 0.. I-W I-U l-I-*-Z -; > to-Z a: z Z -W -W 0 .... I-< W :::;) W w en en a: > --..J U a: I-z :::;) I--I- --I-a: z -Z J: w u. ELEVATION < en en w .W -l-I-U ..J 0 -0.. < -0 0 (J in w < ill( I-0.. en (J') 0 0.. en a. I-..J 0.. 0.. Q. Q. -0 ::E (J') 0( ::E z a: > z w ::E w 0( 0( 0 a: ::E c < 0 0 a: 0 en ..J U 0 U u DESCRIPTION u • a CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF ..... - 1 -- --• 2 SC YELLOW BROWN CLAYEY SAND MOIST MEDIUM --DENSE 3 • SM& INTERBEDED BUFF WITH GREEN MOIST DENSE/ --ML TINT SILTY SAND & SANDY SILT HARD " 4_ (SANTIAGO FORMATION) - ....., - 5_ - • CK -- 6 _ - -. -7 _ - • --8_ - -- 9_ -• ...". - 10 _ - -- 11_ - -• - 12 TRENCH ENDED AT 12' ------• -----. • .~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORATION, LOG LOGGED BY: CRB DATE L.OGGED: SOIL & TESTING,INC. . . 7-18-83 JOB NUMBE'R: 14112 Pl i'ltl=l No ?3 • • z *- w 0 TRENCH NUMBER TH-75 > > > 0. f- I-IIJ I-() l-I-* Z -: > z a: z z -IIJ -IIJ 0 -f-<t W IIJ en en a: > -..J (J ::J W l-I- --a: I-a: I-z Z -::J w -ELEVATION en w -Z I-() :r 0 u. -< en -< IIJ I- ..J --Q CJ !1 IIJ -< -< f-(/) 0. 0. 0 C- o. en 0 en I-..J Q. 0. ::!: en 0. 0. 0 -< ::I: z a: > Z IIJ ::I: w -< <t -< 0 a: ::I: a: 0 0 0 0 (/) ..J () 0 () (J DESCRIPTION u • 0 CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF ---1 - --• 2-- -- 3 • CL GREEN BROWN SILTY CLAY MOIST STIFF --- 4 ML& INTERBEDED LIGHT GREEN BROWN MOIST HARD --CL SILTY CLAY & SANDY SILT 5 _ (SANTIAGO FORMATION) -• --6 _ - CK 118.8 1. 56 .:... - 7 _ -• -- 8_ - -- 9_ -, • -- 10_ - -- 11 --• --- 12 TRENCH ENDED AT 121 -----• ----' - ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORAT ION LOG SOIL & TESTING,INC. LOGGED BY: DATE LOGGED: 7.1 R r.RR --R~ JOB NUMBER: 14112 Plate No 24 • • • z * w 0 TRENCH NUMBER TH-76 > > > - 0-I-W I-U I-* Z -; > I-Z a: z z I--W W 0 -I-< W W W (/') (/') a:. > -u :) Z l-I--...J a: l-I-Z -:) --a: Z :x: w 0 u.. ELEVATION < (/') (/') w w -l-I-U ...J -0-< -Q u (/') W < 4( I-0-en en 0 0-(/') Q 0-I-...J 0-0-0-0 Q. ~ en 4( ~ z a: > z w 2: w 4( < 4( 0 0 a: 2: 0 a: Q en ...J U Q U 0 u DESCRIPTION 0 • 0 CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF ----1 -• ---2- SC YELLOW BROWN & GREEN BROWN MOIST MEDIUM -3-CLAYEY SAND DENSE • 4_ SM& lNTERBEDED BUFF WITH GREEN MOIST DENSE ML TINT SILTY SAND & SANDY SILT - -(SANTIAGO FORMATION) - 5_ - CK 00 , -• - 6 CL& GREEN BROWN SILTY CLAY & MOIST HARD --ML SANDY SILT 7_ --• CK 0- - 8_ - -- 9 • SM& LIGHT GREEN BROWN SILTY MOIST DENSE --ML SAND & SANDY SILT 10 _ - -- 11 • TRENCH ENDED AT 111 ---------...,.. • ------ • ~ SOUTHERN CALIFORNIA SUBSURFACE EXPLORAoTION LOG SOIL & TESTING,INC. LOGGED BY: CRB DATE LOGGED: 7-1 R-R~ JOB NUMBER: 14112 P1at~ No 0 25 • -• z *- w 0 TX-77 > > > - 0. TRENCH NUMBER I-w I-U l-I-*-Z -: > I-Z a: z z w w 0 -I-< w ::::I W W CIJ en a: > --..J (,) a: I-z ::::I I--I-,..... I-0:: Z -w --ELEVATION CIJ w -I-Z I-U J: o ~ « CIJ w ..J Q. « -Q (J 'CIJ W « « I-0. (J) (J) Q. CIJ Q 0.. 0. 0. 0 Q. 0 I-..J Q. ::e (J) ::e z > z W :E W < « « 0 a: t:i: :E Q < 0 0 0::'0 (J) ..J U Q U u DESCRIPTION u 0 • GM BROWN SANDY GRAVEL (TOPSOIL) HUMID/ MEDIUM --MOIST DENSE 1 -GM GRAY BROWN SANDY GRAVEL HUMID VERY - (METAVOLCANIC ROCK) DENSE • 2_ - REFUSAL AT 2.5 1 ---• -----TX-78 0 -CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF -• 1 -.,.... -- 2 GM GRAY BROWN SANDY GRAVEL HUMID VERY -(METAVOLCANIC ROCK) -DENSE • 3 REFUSAL AT 31 ---- --• 0 TRENCH NUMBER X-79 -, CL BROWN SILTY CLAY (TOPSOIL) MOIST STIFF ---1 -• 2-GM GRAY BROWN SANDY GRAVEL HUMID VERY --(METAVOLCANIC ROCK) DENSE -- 3 • REFUSAL AT 31 ------ ~ SOUTHERN CALIFORNIA SUBSU,RFACE EXPLORATION LOG LOGGED BY: CRB ' DATE LOG'GED: 8, .83 SOIL & TESTING,INC. ,7-1 - JOB NUMBE'R: 14112 Plate No. 26 • • • •• • • • • • e· • • RIPPABILlTY INDEX NO RIPPING SOFT MEDIUM HARD 8LASTING .. . . ..... . . ......... .:. .. . ... . .. . .. . .. ... . . . . .... . . o 10bo 2000 VELOCITY, FT.I SE.C. RESULTS TRAV ERSE NO. 5 10 15 .,: LL. 20 , :z:: ~ ~ ~ 25 NOTE: THE ABOVE RESULTS ATTEMPT TO SHOW DEPTHS TO HORIZONS OF VARYING DENSITY IN DIFFERENT LOCATIONS OVER THE' STUDY AREA. SEISMIC TRAVERSE NUMBERS REFER TO LOCATIONS PLOTE'D ON ATTACHED PlANS. Tt-E -RIPPABILITY INDEX"IS A MODIFICATION OF CHARTS ·BY THE CATERPILLAR CO. AND ARTICLE IN "ROADS AND STREETS)' SEPT., 1967. SOUTHERN CAUfORNIA TESTING LABORATORY, INC. &210 RIVERDALE STREET IAH DtEG<?! CALIFORNIA 92120 714-2113-6134 SEISMIC RESULTS CALAVERA HILLS BY DBA DATE 7 -29-83 JOB NO. 1411 2 Plate No. 27 • • • • • • • • • '. NO RIPPING '. . '.' ... : . . . . . . ' .-:".:", .. . '. • • e, '., • . . . .... . . RIPPABILITY INDEX o 1000 2000 '3000 4000 VELOCITY, FT.I se.c. RESULTS TRAVERSE NO. SE-3J SK-32 51(-33 51t-34 GEOPH a I b a I b a I b a I b a I b a Tb a Ib a Tb a Ib alb aTb-alb aTE, I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ! I I I I I I I I I I ' I I I I I I I I I I I I I I 1 I I I I I I J I I I I I I I I I I I I I I I NOTE: THE ABOVE RESULTS ATTEMPT TO SHOW DEPTHS TO HORIZONS OF VARYING DENSITY IN DIFFERENT LOCATIONS OVER 'THE' STUO'f AREA. SEISMIC TRAVERSE NUMBERS RE:FER TO LOCATIONS PLDTED ON ATTACHED PLANS. ne ·RlflPABILlTY INDEX'IS A MODIFICATION OF CHARTS BY THE CATERPILLAR CO. AND ARTICLE IN "ROADS AND STREETS: SEPt, 1967. SOUTHERN CAUFORNIA' TESTING LABORATORY, IN(:. 6280 RIVERDALE STREET IAH OtEGO, CALIFORNIA 92120 714-2113-6134 SEISMIC RESULTS CALAVERA HILLS DBA DATE 7-2- JOB NO. 14112 Plate No. 28 • • • • • • • • • • • RIPPABILITY CHART We are including a rippability chart which applies to the site conditions. The chart is a modification of charts by the Caterpillar Company and an article in "Road and Streets.., September, 1967, which we feel approxi- mately defines rippability with the D-9 using a conventional #9 Single Shank Ripper. D9 Cat -19 Single Shank Rippr (Conventional) Rippable 0 -4,500 fps Marginally Rippable 4,500 -5,500 fps Nonrippable 5,500 + fps For trenching, materials with velocities less than 3800 fps are generally rippable, depending on the degree of fracturing and the presence or ab- sence of boulders. Velocities ranging from 3800 fps and 4300 fps gener- ally indicate marginal ripping, and velocities greater than 4300 fps are generally indicative of nonrippable conditions. ~ SOUTHERN CALIFORNIA ~ SOIL & TESTING, INC. CALAVERA HILLS BY: eRB JOB NUMBER: L41l2 DATE: 8-2-83 • • • • • • • • !. • • ~ w I Vi SAMPLE T69 at 8' T75 at 6' ['IF~ECT SHEAR SUMMARY ~r----r--~--------,---------~------~------~ ----,----_. ----. -------.--.. _-------------------- · .. _-----0--:-_ .. _-:--.. ____ ... _-0--- -. --.. _---~"'l" -.---~ .... _ r ....... ----I ---.-:---------------. ----.-----~ ...... ----. 4~--_r--_+--------;_------~~------_r------~ -. ---'-----t-----. · ..-.-------.. -. --------------------------------... .:--......... . . -------;-.--.-.--. - · ---. --. --_ . .,. ....... ~.----------------.--... ---r-------- -.... -------... -----------............ . _0" .......... ____________ .. ___ , .......... ; T69 at 8' 3~--_r--_+--------;_------~~-------r----~~ .----.. . --~.---.- -_.-"-------.--. -----------1--- 2~-_r-_T--------~------~~------~--~~~T75 at 6' 1 .--. ------_ .. ----------._-_._-.----j-----... . ---.---.. --... _---------+-------_ .. --_. -o~--~--~----------------~~------~------~ 1 2 3 4 !3 2M L 2L NORMAL STRESS, KSF ANGLE OF INTERNAl COHESION INTERCEPT DESCRIPTION FRICTION (O} ( ~sf"l Remolded to natural 30 200 Remolded to natural 13 800 CALAVERA HILLS BY: DBA DATE: 8-2-83. ~SOUTHERN CALIFORNIA ~C; SOIL & TESTING,INC. L-__________________________ ~ ____ ~JO_B~N~U_M~B~ER_:_l~4_1~12~~~ __ ~~~--~3O~-m • • • • • • • • • • • • SLOPE STABILITY CAlCULATIONS Janbu's Simplified Slope Stability Method '>..C¢ -WH Tand> - C I FS=Ncf( W~ ) Assume strength parameters throughout the slope - ,0 (0) C ( psf) \lis (pef) Inc 1. H (ft) 30 350 Fill slope* 30 350 13 800 Cut slope 13 800 13 800 Fi 11 Slope** 25 400 Where: 117 2: 1 88 117 1 '.5: 1 45 140 2: 1 45 140 1.75: 1 35 140 1 .5: 1 25 120 2:1 70 ~ = Angle of Internal Friction C = Cohesion (psf) Ws = Unit weight of Soil (pef) H = Height of Slope (ft) FS = Factor of Safety * Shear strength values from previous report ** Assumed shear strength values for on site non-select mix ~ SOUTHERN CALIFORNIA W SOIL .. TESTING,INC. CALAVERA HI! I S BY: DBA JOB NUMSER 14112 , FS 1.66 1. 62 1. 52 1.63 2.0 1.5 DATE: 7-29-Ft~ Pl ate Nn 3J, __ .. • • • • • • • 1:.,' ... • • j ..,....-+--..--------------."..~-..... ~-.... ----- \ o (\J \ L{) (\J FORMATIONAL SOILS ----PERFORATE.D PIPE FILL AREA ("ATIVE SlL TV SANDS W .•. TR MINOR CLAYSTONES" SI1.TSTONES) BUTTRESS ~ SOUTHERN CALIFORNIA 'W SOIL a TESTING, INC. DETAI·L CALAVERA HILLS BY: DBA DATE: 8-3-83 JOB NUMBER: 14112 • • • • • • • •• -• • I 70 H H/2 VARIABLE NONSELECT FILL TOPSOIL"CLAYSTONE,S ~ SIL TSTONES MAY BE P:LACED IN THIS AREA SIL TV SAND WITH MINOR CLAYSTONES &. SILTSTONES~ __ H_/4~...,.. _____ _ --------------------------~--- .-IL-------- SAND T.OPSOIL TO BE REMOVED {NATURAL FORMATIONAL SOILS ~ SOUTHERN CALIFORNIA 'W SOIL & TESTING,INC. Calavera Hills Subdivision, Carlsba~ BY: SMS DATE: 7-29-83 JOB NUMBER: 14112 Plate No. 33