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Home My WebLink AboutParcel Map 21383 Geotechnical Report • OR Geotechnical • Geologic • Environmental 24890 Jefferson Avenue Murrieta, California 92564 • (909) 677-9651 • I=ax 1;909) 677-9301 Mailing Address: P.O. Box 490 • Murrieta, California 92564 February 23, 1996 W. O. 1881-Al-SC Opti-Forms, Inc. 27620 Commerce Center Drive Temecula, California 92590 Attention: Mr. Clint Tinker Subject: Addendum to Foundation Plan Review, Lot at South Corner of Winchester Road and Calle Empleado, Temecula, Riverside County, California References: (1) "Geotechnical Mass Grading Report No. 2, Parcel Map No. 21383 (Core 1, Phase II), Temecula, California," AT40513, by Schaefer Dixon Associates, dated January 7, 1992. (2) "Revised Field Review/Lot Recertification, Lot at South Corner of Winchester Road and Calle Empleado, Temecula, Riverside County, California," W. O. 1881-A-SC by GeoSoils, Inc., dated August 29, 1995. (3) "Foundation Plan Review, Lot at South Corner of Winchester Road and Calle Empleado, Temecula, Riverside County, California," W.O. 1881-Al-SC by GeoSoils, Inc., dated January 30, 1996. In accordance with your request, GeoSoils, Inc. (GSI) performed a foundation plan review and presented a report with its findings on January 30, 1996 (reference no. 3), copy attached. In that report, it was indicated that the reviewed plans appeared to be in general conformance with the recommendations presented in the GSI, Lot Recertification Report (reference no. 2) with one exception regarding the tying of column footings by means of grade beams. It was requested that the structural engineer determine whether or not such beams were required, from a structural viewpoint, due to their location within the slab. This determination has now been made by the structural engineer, Harry Deardorff, and presented in an updated handwritten memo, copy attached, which indicates that the slab- on-grade will do the job of the recommended grade beams. Therefore, our recommendations have been met regarding this matter. Opt!-Forms W. O. 1881-Al-SC South Corner of Winchester and Calle Empleado February 23, 1996 Temecula Page 2 Although the reviewed Foundation Plans indicated that a rock base was to be used under the proposed slabs,the type of rock to be used was not specified. Because of this reason, the January 30, 1996 report (reference no. 3), also presented a recommendation regarding the type of rock base to be used under slabs. Although the recommendation to place a rock base under the slab did not originate from GSI, our Foundation Plan report did not ask that the recommended rock base be deleted because its placement should enhance the long-term performance of the slab. During a telephone conversation with the project structural engineer, it was learned that the rock base recommendation may have been presented in the original site investigation report by others (Schaefer Dixon Associates). The ultimate decision on whether or not the rock base is placed should be made by the structural engineer, based on the expected slab loads, and by the property owner, based on the desired long-term performance of the slab. The opinions and recommendations presented herein have been derived in accordance with current standards of practice and no warranty is expressed or implied. GeoSoils, Inc. assumes no liability or responsibility for work, testing, or recommendations performed or provided by others. We appreciate this opportunity to be of service. If you have any questions pertaining to this report, please contact us at (909) 677-9651. Respectfully submitted, GeoSoils, Inc. P Luis Fernando Aragon �; � ` 'poi\ Sherry L. aton Civil Engineer, RCE 26096 No. 99 �' y m Project Manager Geotechnical Engineer, GE 99 Irxp,3 31 .9g °rrc�+^�`c LFA/mma sT a�2 F°F CAO1_C-''' Enclosures: (1) Copy of January 30, 1996 report (GSI) (2) Copy of structural engineer's memo regarding tying of column footings Distribution: (2) Addresse (1) Lusardi Construction, Attention: Carl Medley (2) Vandorpe Chou Associates, Attention: Neil Evans (1) Deardorff & Deardorff, Attention: Harry Deardorff GeoSoils, Inc. Geotechnical • Geologic • Environmental 24890 Jefferson Avenue Murrieta, California 92564 • (909) 677-9651 • Fax (909) 677-A301 Mailing Address: P.O. Box 490 • Murrieta, California 92564 January 30, 1996 W.O. 1881-Al-RC Opti-Forms, Inc. 27620 Commerce Center Drive Temecula, California 92590 Attention: Mr. Clint Tinker Subject: Foundation Plan Review, Lot at South corner of Winchester Road and Calle Empleado, Temecula, Riverside County, California References: (1) "Geotechnical Mass Grading Report No. 2, Parcel Map No. 21383 (Core 1, Phase II), Temecula, California," AT4056, by Schaefer Dixon Associates, dated January 7, 1992. (2) "Revised Field Review/Lot Recertification, Lot at South corner of Winchester Road and Calle Empleado, Temecula, Riverside County, California, " W.O. 1881-A-SC By GeoSoils, Inc., dated August 29, 1995. In accordance with your authorization and request, we have reviewed the following project plans, prepared by Deardorff & Deardorff: S1.0 (Revised October 11, 1995), and S2.0, S2.3, and S4.0 (Revised January 8, 1996) with respect to conformance with recommendations as presented in the above referenced report (GeoSoils, Inc., 1995). Our review indicates that the plans appear to be in general conformance with the recommendations presented in the aforementioned report (GeoSoils, Inc., 1995) from a geotechnical viewpoint, with the following exception: On Item No. 4 (Page 7) of the report, it is recommended that a grade beam be provided between column footings. The reviewed plans do not appear to reflect this recommendation. However, it may be possible that due to the size, type and location of the column footings, tieing them by means of a grade beam to prevent lateral movement might not be necessary. The project structural engineer should make the final determination on the need for these structural members. Opti-Forms, Inc. W.O. 1881-Al-RC Lot at Winchester Rd. and Calle Empleado January 30, 1996 Temecula, California Page 2 Also, Plan S2.0 indicates that a "5 inch concrete slab with #3 bars at 18" O.C., each way, centered on slab will be placed over a base of crushed rock. Neither the thickness nor type of rock are specified in the plans. It is recommended that Class 2 aggregate base materials (or equivalent), compacted to a minimum relative compaction of 95 percent, be used. The thickness of the rock should be determined by the structural engineer based on the expected loads and conditions, but experience has shown that it is not practical to place and compact a base layer of less than 4 inches. These opinions and recommendations presented herein have been derived in accordance with current standards of practice, and no warranty is expressed or implied. GeoSoils, Inc. assumes no liability or responsibility for work, testing, or recommendations performed or provided by others. We appreciate this opportunity to be of service. If you have any questions pertaining to this report, please contact us at (909) 677-9651. Respectfully submitted, GeoSoils, Inc. A Q�C "AND,` ! Sherry L. Eaton r^� Project Manager No. 99 rr 6i \ 7t Exp.3' . -96 r Luis Fernando Aragon v r`cF Civil Engineer, RCE 26096 Geotechnical Engineer, GE 99 LFA/SLE/sh Distribution: (6) Addressee (1) Facsimile Copy - Lusardi Construction, Mr. Scott Staley GeoSoils, Inc. 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California 92564 January 30, 1996 W.O. 1881-A2-RC Opti-Forms, Inc, 27620 Commerce Center Drive Temecula, California 92590 Attention: Mr. Clint Tinker Subject: Evaluation of Borrow Site for Lot at South comer of Winchester Road and Calle Empleado, Temecula, Riverside County, California References: (1) "Geotechnical Mass Grading Report No. 2, Parcel Map No. 21383 (Core 1, Phase II), Temecula, California,"AT40513, by Schaefer Dixon Associates, dated January 7, 1992. (2) "Revised Field Review/Lot Recertification, Lot at South comer of Winchester Road and Calle Empleado, Temecula, Riverside County, California,"W.O. 1881-A-SC By GeoSoiis, Inc., dated August 29, 1995. In accordance with your authorization and request, this letter presents our evaluation of the materials that are proposed to be imported to the subject site. The borrow site is lot 32 of Tract 21383, Phase 1, and is located adjacent to the subject site. We have performed a site rec onnaissanoe of the import site and taken bulk soil samples. The import site appears to be underlain by artificial fill materials placed during tract grading. The proposed import material is considered suitable for placement on the proposed site, and our laboratory testing indicates that the materials have a low expansion potential (expansion index 24). The fill material should be cleansed of major vegetation and debris prior to placement. In addition, if any oversized materials (materials greater than 12 inches) are encountered during import, they should be removed from the import material prior to placement on the site or during placement on the site. These opinions and recommendations presented herein have been derived in accordance with current standards of practice, and no warranty is expressed or implied. GeoSoils, Inc. assumes no liability or responsibility for work, testing, or recommendations performed or provided by others. TO 16197449064 P.02 01 j1, 1ge6 12;26 FROM GEOSOILS, INC. i Opti-Forms, Inc. W.O. 1881-A2-RC Lot at Winchester Rd. and Calle Empleado January 30, 1996 � Page 2 Temecula, California We appreciate this opportunity to be of service. if you have any questions pertaining to this report, please contact us at (909) 677-9651. z°paor' �oN Respectfully submitted, ��, ��NA�ta -v GeoSoils, inc. Reviewed by: No. 99 rn Z m Exp. . OF CAt�r Sherry L. Eaton Luis Fernando Aragon Pro}ect Manager Civil Engineer, RCE 26096 Geotechnical Engineer, GE 99 SLE/LFA/sh Distribution: (6) Addressee (1) Facsimile Copy- Lusardi Construction, Mr. Scott Staley GeoSo{ls, Inc. TOTAL R.82