The URL can be used to link to this page

Home My WebLink AboutCT 05-06; CASSIA PROFESSIONAL OFFICES; AS-GRADED GEOTECHNICAL REPORT ALL CATS HOSPITAL; 2006-09-140) 8 8/ 0 00 0 0 0 00 0 00 900 00 0 : 0 00 0 0 0 4) 09 0 00 0 0 00 0 00 8 4 00 00 .0 4) 80 00 0 0 000 0 0 0 / 0 '• -do I ,. 5 SOIL I TISTING, INC. San Diego Office Indio Offce r - a P.O. Box 600627 F HO r (760) 775-5983 -o CitrusAvenue I - . i9) 280-4321 • - Sen Diego, CA 92160-027 Sute G (877) 215-4321 10RnverdaneStret (87/) 2152E1 lflcJno CA 92201-3438 San Diego, CA.92120 (61.9) 280-47!7 www snt em (760),775-8364 www.scst.corn I o -•-.:- •' - . -, F A 1-' . . . . - - ' AS-GRADED . . GEOTECHNICAL REPORT I -. . LL'CATSHOSPITAL. ELCAMINOREAL - AND CASSIA ROAD'... . • . CARLSBAD, CALIFORNIA . . . I' . , I: I MISS LYNN YUT ALL CATS HOSPITAL . I . .. 7040 LOKER AVENUE WEST, SUITE 100 •• -. ,• CARLSBAD, CALIFORNIA 92008 . i - - .- - -• •.: I PREPARED BY: SOUTHERN CALIFORNIA SOIL & TESTING, INC. - • . . - 6280 RIVERDALE STREET' ' SAN DIEGO, CALIFORNIA 92121 ' S 5 ,_ ' S - S n' I - -- S •: - iS ,, 'S i , I Providing Professional Engineenng Se ices Since 1959 I I TABLE OF CONTENTS I SECTION PAGE.' I. SITE DESCRIPTION AND PROPOSED DEVELOPMENT ........................................... ............ 1 I I .1. SITE PREPARATION................................................................................................................. 1.1.1. Primary Equipment ............................................................................................................../ 1.1.2. Initial Site Grading ............................ ......... .. ........... ............................................................ ....2 I 1.1.3. Site Grading by Southern California Soil and Testing ........................................................ 2 1.1.4. Cut/Fill Transition .................................. .............................. ................................................ 2 1.1.5. Keyway ................................................................................................................................3 1 ,1.1.6. Fill Slopes ................. . ................................. ............................................................................ 1.1.7. Roadways............................................................................................................................... 3 1.2. FIELD OBSERVATION AND TESTING ................................................... ................................ 3 1.3. LABORATORY TESTS.... ............................................. . ............................................................ 4 1 1.4. REMAINING WORK ..: ......................................................................... % ........... I ......................... 4 2. CONCLUSIONS ....................... .. • .5 ........... 4 I 3. LIMITATIONS................................................................................................................................ ATTACHMENTS I PLATES . ...., . ... Plate 1 Limits of Removals and Fill Elevations by Geocon, Inc. I . 'Plate ? Field Density Test'Locations . .; .. Plates 3-4 Field Density and Laboratory Compaction Test Results I ,,., .5 . , .5 5 5'•" 1• S ' 5. .5 5 . , S . , ' ,. 5, 5 1. , 5 S ., , . ..• ' , . '5 ' :. S SOIL$ TESTING, INC. San Diego Office Indio Office• , • 0 H 0 N P0 Box 600b7 ic' (7 0) 775-5983 81-7 40 Citrus Air ' 2F4O-421 - Sari D3aO, CA 92160-0627 Suite 0 I Sic (877)2151:2 0. FREE o280 Riverdale Street (877) 215 4J21 '138 Indio, CA 02201 io San De'7o, CA 92120 I i619) 280 471' nwis sLct cor ('80) 775-8362 .NWW c,sr corn 1 September 14 2006 SCS&T No 0611115 Report No 3 I Ms Lynn Yut All Cats Hospital 7040 Loker Avenue West Suite 100 I Carlsbad California 92008 Subject: AS-GRADED GEOTECHNICAL REPORT - ALL CATS HOSPITAL ' .. I . EL CAMINO REAL AND CASSIA ROAD' CARLSBAD, CALIFORNIA . Reference; 1) "Geotechnical Investigation, Cassia Road Site, Carlsbad, California prepared by - I Geocon ,Inc.; dated December 16,:2004 (07431-22-01). Ms. Vut: •. ..• •. I- Dear In accordance- with your request, this report has been prepared to preseñtthe results of field observations and tests performed in conjunction with the grading operations and site improvements at the subject site. Our services were performed between August 8 and August 23, 2006. The grading was performed by Vinci Pacific Corporation of Rancho Santa Fe, California To as in 1 . determining the locations and elevations of our field density tests, we were provided with a grading plan prepared by O'Day. Consultants dated July 2005, which defines the general extent of site . - grading. .. •. : .- 1 1 SITE DESCRIPTION AND PROPOSED DEVELOPMENT The project site is a 3-acre triangular-shaped parcel located east of El Camino Real and north of the I extension of Cassia Road Grading was performed to provide for two building pads roadways, slopes and incidental areas necessary for the development of two office buildings 11 •i SITE PREPARATION' . .., . •- . - . • 1.1.1. Primary Equipment • . •. • . -. . I The . primary equipment employed for the mass grading operation consisted of I . 1 -. Caterpillar 950 Loader. - 1,— Water hose 1- John Deere 700 Dozer el Lynn Vut . . .. September 14, 2006 Cats Hospital . SCS&TNo. 0611115-3• I A!! El Camino Real and Cassia Rd., Carlsbad, CA . Page 2 11.2. initial Site Grading . I The potentially compressible topsoil deposits were removed in their entirety from the proposed building pads.. The bottoms of the removal areas typically exposed Santiago Formation. The I .removals extended five feet laterally beyond the extent of each building. These removal limits and fill placed were observed by Geocon, Inc. The limits of removals and fill elevations are on Plates No. 1 and 2. . I illustrated 1.1.3. Site Grading by Southern California Soil and Testing I Southern California Soil and Testing began performing geotechnical observation and testing on August 8, 2006. Six in-place density tests were performed on August 8, 2006 in the previously placed fill. The potholes revealed that some of the fill contained roots and other organic matter. The fill in the building pad areas was removed to a depth of one foot and scarified to a depth of 1 one additional foot. The detrimental material generated from these operations was exported from the site. I 1 1 ' Potentially compressible topsoil deposits were removed in their entirety from the areas to receive fill and from beneath settlement-sensitive improvements under SCS&T observation beginning August 8, 2006. The bottoms of the, removal areas typically exposed Santiago Formation deposits. These removals extended throughout the site and at least two feet beyond the retaining wall and pavement areas. Limits of the removals are shown on Plate No. 2. Additional removals in the proposed pavement area will be performed during subsequent stages of construction. The additional removal areas are shown on Plate No. 2. The soils generated from the removal operations and the on-site cuts were placed in the removal areas as compacted liii material. Some imported soils also were used. Typically, fill soils were placed in thin moisture conditioned lifts and compacted until field density tests indicated a minimum of 90 percent of maximum dry density. Compaction was achieved by means of 'a Caterpillar 950 rubber tire loader and other heavy construction equipment: This process continued until design elevations were reached. . 1.1.4. Cut/Fill Transition . . ,. . . Where a transition between cut and fill material occurred within three feet of finish pad grade. the cut portions of the pads were over-excavated to a minimum depth of three feet below. finished pad grade. The over-excavation was performed to create a uniform condition beneath the 'proposed structures and improvements and to lessen the potential for differential settlements. Undercuts were all pert ormedin parking areas to remove expansive soils. The fill Lynn '(Ut September 14, 2006 .All Cats Hospital SS&TNo. 0611115-3 I El Camino Real and Cassia Rd., Carlsbad, CA' . Page 3 I were material was generally placed and compacted as previously described until design elevations reached. . I 1.13, Keyways . fill To provide adequate support for the proposed slopes located in the eastern portion of the site, keyways were cut into fórrnational materials along the toes of the slopes. The keyways 1 . were generally 15 feet wide and sloped back into the existing sloping terrain at an approximate gradient of two percent. The keyway bottoms were scarified to a depth of 12 inches, moisture conditioned and compacted prior to receiving additional fill. I 1.1.6. Fill Slopes 1 . Typically, the fill slopes were over-filled and wheel rolled by a rubber-tire dozer and other heavy equipment, at two-foot vertical increments. After approximate final grades were obtained, the slopes were cut back to designed inclinations. In order to further compact the fill slopes and to I provide for a uniformly compacted slope-surface, the faces of the slopes were track-walked with a crawler dozer. I 1.1.7. Roadways The project site included the rough grading for the widening of El Camino Real and the I . ,extension of Cassia Road. Site preparation for Cassia Road essentially consisted of the same operations that were employed for the project site. The original topsoil was removed until the top Of competent material was encountered. Fill material was placed in thin moisture conditioned lifts and compacted to at least 90 percent of maximum dry density. Additional removals for the I extension of Cassia Road will be, performed at a later date. The rough grading for the widening of El Camino Real essentially consisted of removing the topsoil and formational deposits tothe elevations of the existing El Gamma Real Road. I .1.2. FIELD OBSERVATION AND TESTING Field observations and density tests were performed at the locations shown on Plate No. 2 by a 1 . representative of SCS&T during the grading operations. The density tests were performed according to ASTM D 2922-01 (nuclear gauge) procedures. The results of these tests are shown on Plate Nos., • 3 and 4. The accuracy of the in-situ density test locations and elevations is a function of the accuracy of the survey control provided by others. Unless otherwise noted, their locations and elevations were determined by pacirg and hand level methods and should be considered accurate only to the degree implied by the method used. I ..:..' I I • • • • . . • • . . . . . "Y" . • • • • •. • Lynn "ut September 14 2006 All Cats Hospital SCS& T No. 06111 153 El Camino Real and Cassia Rd., Carlsbad, CA Page 4 As used herein, the term bobservationn implies only that we observed the progress of work we were involved with, and performed field density tests which in conjunction with our observations were the basis for our opinion as to whether the work was performed in substantial conformance with the geotechnical recommendations and the requirements of the applicable agencies 1.3. LABORATORY TESTS Maximum dry density determinations were performed on representative samples of the sods used in the compacted fills according to ASTM D 1557 00 The results of these tests, presented on Plate No 4 were used in conjunction with the field density tests to determine the degree of relative compaction of the compacted fill The expansion potential of fill soils within the upper three feet of finish grade was determined using UBC Test Method 18-2 The results of the tests are shown on Plate No 4 The results of these tests indicate non-detrimentally expansive soil conditions 1.4. REMAINING WORK The following operations remain to be completed. It is recommended that field observations and relative compaction tests be performed during these operations to venfy that these operations are being performed in accordance with job requirements and local grading ordinances. Additional grading of the on site paved areas and widening of Cassia Road Preparation and the placement of the roadway, parkway, and curb and gutter subgrade Preparation of the parking lots and Cassia Road sUbgrade and base courses; Backfilling the underground utility trenches 2 CONCLUSIONS Based on our field observations and the in-place density test results, it is the opinion of SCS&T that the grading work was performed substantially in accordance with the recommendations contained in the referenced geotechnical report, the City of Carlsbad Grading Ordinance, the Grading/Improvement Plan Drawing Number 438-3A and the California Building Code Minimum recommendations for the design of the foundations, as presented in the referenced report, remain applicable 3 LIMITATIONS This report covers only the services performed between August 8 and August 23, 2006 Our opinions presented herein are based on our observations and the relative compaction test results - . _____ -- • - •MOOPI 3150J — 312.5 *12 315.0 313.0,6 0 312.5 312.0 314.01 315.0 \ \\\ \J315.5 21 • 8 • 17 /[316 51 •20 — 1315.01 I314.5V • 18 / - ii 14 316.5 _2 iii / 77 1 947 _ /1 _ I317 l7t> I ! 1314.01 / 30 25-/'~ BLDG. SCS&T LEGEND 0 47 Approximate Location of In-Place Density Test 316.01 Approximate Removal Bottom Elevations — Approximate Limits of Removal Approximate Limits of Keyway Area To Be Removed At a Later Date Approximate Limits of Removal Signed Off by Geocon, Inc. 2 316.0 450 0 kinI __ I RIGHT— OF— WA Y //Jo7 W11' I 1314.51 3 309.0 16 04 311.0 0 05 34 0 10.0 09 311.5 PAD lo E309.0 It9ol lo 313.0 -31 0 314 FOR Pa 7 - TT TT3 TjT - - -- / --- 20' n' 12no 11; SCALE: 1"=20' 0 L SC ST SOUTHERN CALIFORNIA SOIL & TESTING, INC All Cats Hospital By: SW/DCD Date: 08/12/06 Job No.: 0611115-3 Plate: 2 SCS&T LEGEND 1320.01 Approximate Elevations of Fill Signed Off by Geocon, Inc. - Approximate Limits of Removals Signed Off by Geocon, Inc. . "IMIZ =7 — V 20' ON 20' 40' 80' SCALE: 1" = 20' 120 Cn -- I Sc ST SOUTHERN CALIFORNIA SOIL & TESTING, INC All Cats Hospital By: swioco Date: 08112/06 Job No.: 0611115-3 Plate: I I JOB NAME: All Cats Hospital ' ' JOB NUMBER: 0611115-3 : IN-PLACE DENSITY TESTS .. I. TEST . ELEVATION MOISTURE DRY DENSITY SOIL REL.COMP. NO. DATE. LOCATION (feet,MSL) (peréent)' (p.c.f.) TYPE (percent) GradinQ I 1 8/8/06 Building B . 318.0' 11.3 . 114.8 1 92.1 2 8/8/06 Building B . 318.0 ' 12:2 12.1.5 2' 981 3 8/8/06 Building , . ' 319.5 . 12.3 . 114.5 . 1 91.8 I , 4 8/8/06 Building A ' ' .318.0..' . ' 14.2 ' 115.0 2 92.8 5 . 8/8/06 Building . ' 315.0 . 12:2' 113.9 2 91.9 6 8/8/06 Street between Buildings A &.B : ' 315.0 ' 13.7 113.7 ' 2' 91.8 I ' 7 8/9/09 Building B . . 319.0 14.3 ' 114.3 , 2 ' 92.3 8 8/9/06 Street between Buildings A & B ' 3,16.0 12.0 ' '113:9 2 91.9 9 8/10106 Street between Buildings A & B ' . 316.5 .11.7 , ' . 115.1 1 92.3 10 8/10/06 Street between Buildings A & B ' ' 317.5 13.5 , ,114.6 2 92.5 I 11 8/10/06 Northeast Parking Lot ' ' 314.5 11.5 , 114.5 ' 2 ,, 92.4 12 8/10/06 Northeast Parking Lot 315.5 ., 12.0 . 117.1 ' 1 ' 93.9 13 8/10/06 ' Northeast Parking Lot ' 316.0 13:1 ' 113.5 , ' 2. 91.6 14 8/10/06 Northeast Parking Lot " 316.0 .. 13.5 112.5 2 90.8 I 15 8/11/06 Southeast Parking/Driveway ' .316.0 ' 12.4 ' 115.6 1 92.7 16 8/11/06 East Parking Lot .' ' 318.0 12.7 . 116.8 1 93.7 . 178/1.1/06 East Parking Lot. '' . '318.0 13.9 118.2 ' 1 94.8 I 18 8/11/06 East Parking Lot . . . , 318.0 ' . 11.5 ' , 118:4 ' , 1 94.9' 19 8/11/06 East Parking Lot ' . ., 315.0 ' 12.5 112.5. 21 90.8 20 8114/06 ' East Parking'iot' , , , ' 318.5 13.3 116.7 1 ' 93.6 21 8/14/06 East Parking Lot . ' .. 319.0 132 113.8 2 91.8 I 22 8/15/06 South Parking Lot/Street . ' . 318.0 , ,' 15.1 113.4 2 91.5 23 .8/15/06' South Parking Lot/Street 318.0 , 12.6 . 115.2 2' 93.0 24 8/15106 South Parking Lot/Street . • ' 318.0 11.5 113.9 2 . 91.9 ' 25 8/16/06 South side of Building B , , 320.0 10.7 113.9 2 91.9 26 8/16/06 SoUth side of Building B . .' 318.0 11.8 , 115.2 ' 2 , , 93.0 27 8/16/06 West side of Building B ' .' ' ' 318.0 9.9 114.1 2 . 92.1 28 8/16/06 North side of Building B ' ' , 314.0 12.5 112.5 ' 2 ., 90.8 I . 29 8/16/06 North side of Building B 313.0 . 11.5 . 111.8 2 90.2 30 8/16/06 North sideof Building B . ' 316.0 12.6 111.7 2 . 90.2 31 8/16/06 North side of Building B 316.0 . 13.9 112.0 2 904 32 ' 8/16/06 North side of Building B 318.0 . ' 10.0 113.8 2 91.8 I 33 8/16/06 North side of Building B.' ' , 317.0 11.7 114.5 2 92.4 34 8/18/06 'BuildingA . , , . 318.5 14.0 118.6 1 95.1 I .35 36 8/18/06 8/18/06 Building . ' , Parking Lot- North side building A ' . . 318.5 , '. , 310.0 12.4 ' , 152 ' 116.0 ' 107.7 , 1 3 93.0 , 91.3' 37 8/18/06 Parking Lot - West of building A 312.0 12.6 . 108.5 3 91.9' 38 8/19/06 DW between Pads A&B . . ,. , ' 320.0 12.4 , ' .. 106.7 " 3 , 90.4: I 39 8/19/06 DW between Pads A&B " 319.0 13.9 108.3 ' . 3 ' . 91.8 40 8/19/06 North side of Building A ' 314.0 . 13.2 . ' 107.4' 3 91.0 41 . 8/19106 North side of Building A ' " , ' 314.0 ' 11.6 ' 108.5 3 '. 91.9 I '42 43 8/19/06 8/21/06 North side of Building A . Parking lot - North of Building A ' ' '315.0 , 310.0' 12.7 13.7 ' 106.9 '109.4 3 3 90.6 92.7 44 , 8/21/06 Parking lot - North of Building A 312.0 15.1 108.1 . 3 . 91:6 45 8/21/06 Parking lot North of Building A 315.0 14.2 108.7. 3 ' 92:1 1 . 468/21/06 Parkinglot - NorthofBuildingA ' 315.0' , 13.5 ', 106.6 3 90.3 47 8/22/06 Parking lot - North of Building B , '320.0 . 1,2.6 112.8 2 ' 91.0 48 .8/22/06 Parking lot - North of Building B,: 320.0 ' 13.7 ' ' 113.6 2 91.7 49 8/22/06 Parkinglot - NorthofBuildingA . 317.0 . 12.5 108.0 , 3 91.5 I 50 8/23/06 Parking lot - North of Building A . 319.5 ' . 10.4 '109.0 3 ' 92.4 _4 -- I .4 4. 4 4 4: 4 I ' ,'JOB NAME: All Cats Hospital . . ... '- . * JOB NUMBER: 0611115.3 'IN-PLACE DENSITYTESTS . '. -5 - TEST .-' . . ELEVATION MOISTURE DRY DENSITY SOIL REL.COMP. • : NO. DATE .' LOCATION - (feet,MSL) . -4(percent) (p.c.t.) TYPE (pecent) 51 8/23/06 Parking lot --North of Building A 319.5 - 9.9 11.0 2 .93.6 8/2 52 3/06 Building A " 3195 FG , 14.2 1175 lMP1 91.7 I 53 8/23/06 Building B. .. .1,, 320.0 FG 95 113.6 2 91.7 4,- I 1; • . . MAXIMUM DENSITY AND OPTIMUM MOISTURESUMMARY (ASTM D1557) Sod Maximum Optimum Type' Soil Description ., , .,, '. Density. pcf , . Moisture. % 1 Dark Brown Silty Sand 124.7 8 8 2 -' Tànto Light Brown Silty Sand with Clay .. - ' 123.9 - --9.1 * 3 . Yellow Silty Sand (S.nhigti cnrmat1Qa) '1.18.0 9 6 IMP1 Import Orangeto Brown SiltrySand 1282 91 EXPANSION INDEX RESULTS .4' . -. ' ......4.• . .. , T. '1.... . .4. 4' ,. .4 - ,. ..' .. _•*# I EXPANSION SAMPLE EXPANSION EXPANSION ; TEST SAMPLE LOCATION , '- . ', '-'a INDEX •-' .' POTENTIAL I c El 1 4" Pad A 32 Low EI2'4 Paid B' 29'4'. Low I .. - .•.-. . . 4 ., .4 . .4 - • - 4... . .4 4 * . '1' .4 :--; . 4 .4 I 0. .4' I I . '" -- ,. ' -: :-- '. ;: 4 . ' .4 - .4 :'' .4 .4 •44 . - .4'1 .4 -, -4- 4- .4 .4 •'' -: '': - .4. , 4