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Poppy Trail Landslide Reports Group DeltaAGREEMENT BETWEEN GROUP DELTA CONSULTANTS AND CITY OF ROLLING HILLS FOR LANDSLIDE MONITORING SERVICES. City Manager Dahlerbruch presented the staff report providing background regarding the agreement for landslide monitoring service and the associated costs. Following brief discussion regarding the number of inclinometers that need monitoring, Mayor Lay called for a motion. Councilmember Hill moved that the City Council approve an agreement and purchase order with Group Delta Consultants for continued and on -going monitoring and analysis of the inclinometers installed on the Poppy Trail landslide. Councilmember Pernell seconded the motion which carried unanimously by those Councilmembers in attendance. January 19, 2010 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 ECEINED APR 1 i 2010 City of Rolling Hills By Attention: Tony Dehlerbruch, City Manager GDC No. L -599D Subject: Winterization Evaluation Letter Poppy Trail Landslide Rolling Hills, California Project# L-599 D Mr. Dehlerbruch: On January 19, 2010, representatives of Group Delta Consultants, Inc. (GDC) performed a site visit of the Poppy Trail Landslide in the City of Rolling Hills, to observe the condition of the existing landslide repair project and evaluate the winterization of the repair work. The landslide protection activities conducted in 2005 involved a partial removal of the landslide headscarp, and grading to seal crack in the slide mass. In the fall of 2006 the protection measures were added to include a new visqueen sheeting and a TRM fiber blanket to protect the visqueen from degradation. Currently, visqueen sheeting protected by green TRM 50 fiber blanket covers the landslide to protect it from erosion and/or potential failures due to saturation. Maintenance of the cover is important to prevent exposure of the slide area. In general, the plastic and fiber covers were noted to be in good condition during the site visit. However, the GDC representatives noted several areas of concern, including: • The visqueen placed around the upper edge of the landslide back scarp which protects the upper slide area from erosion and/or saturation has been damaged over time. • PVC drainage pipes installed in 2005 for collecting and transporting water around and over the landslide before it enters the landslide, were disconnected and no longer operational. • Several tears in the green fiber blanket cover and underlying visqueen sheeting were noted in the central part of the slide (near the #1 Poppy Trails Owner Easement), creating a potential for water to enter the landslide. ,170Amapola Avenue, Suite 213 a Torrance, California 90501 w (310) 320.5100 cuiee A (310) 320.2118 fax Irvine. California (945) 450-2100 ♦ San Diego, California (85<S) 524.1500 www. (iroupl)ella.cons Winterization Evali-attonLettpr n•' > ,` . January 19, 2010 Poppy Trail Landslide <� ..:, .� .�.s r' : Page 2 Rolling Hills, California The central, Ieverportion9t f. the slide, and lower tow were noted to have established weeds and bushed or trees since 2005. This probably aids in anchoring the covering, GROUP'' r - DELTA, suctuntim 390Aanapila Avenue, Suite 212 • Torrance, California .90.501 • (310) 320-5100 rokr • (310) 320-'118 fax Irvine, California (943) 450.2100 ♦ San Diego, California (858) 524.1500 warle.Cronp1 eIla.eoln 6-7 GROUP. DELTA- tokAitnam Winterization Evaluation Letter Poppy Trail Landslide Rolling Hills, Califomia Suggestions for winterization are as follows; January 19, 2010 Page 3 • The visqueen around the upper edge of the landslide should be repaired or replaced to cover the exposed soil, and held in place with clean 1/2 -inch aggregate fills bags to provide access to #1 Poppy Trail. • The PVC drainage structures and pipes have been removed and are no longer in service. The structures should be replaced and adequately constructed to properly transport water away from the landslide. This may require constructing a sandbag headwall near the #1 Poppy Trails Owner Easement, to direct water into the drainages structures and keep water from migrating into the slide from the road. Also, it may be necessary to secure the piping joints with slope stakes or similar, to prevent dislodging. The piping should extend to an appropriate water disposal location (i.e. stormdrain) per the original mitigation plan prepared by Bolton engineering. • Several tears were noted in the fiber blanket and underlying visqueen in the central portion of the slide, near the easement road. The damaged area needs to be repaired by covering exposed visqueen sheeting, recovered with fiber blanket, and then re -spiked to the ground. The rainy season is currently underway. To prevent storm water runoff from increasing the possibility of erosion or failures, the above described repairs should be completed as soon as possible. We appreciate the opportunity to provide geotechnical and geologic services for this project. If you have any questions pertaining to our report, or if we can be of further service, please do not hesitate to contact us. Sincerely, GROUP DELTA CONSULTANTS, INC. Chris A. Guesnon, CEG Michael D. Reader Senior Geologist Principal Geotechnical Engineer 370Amapala Avenue, Suite 212 t Torrance, California 110501 A (310) 320.5100 voice s (310) 320.2118 fax Irvine, California (919) 450.2100 s San Diego, California (858) 5`14-1500 LVWW.Groupiella.com GROUP 1)1 1.ReNgiintEIZIM 1 .\ Winterization Evaluation Letter Poppy Trail Landslide Rolling Hills, California January 19, 2010 Page 4 View of upper edge of landslide back scarp. The black plastic sheeting was damaged after its installation (#1 Poppy Trail property in background). Typical PVC drainage structure, disconnected and no longer in service. 370ArnapolaAvenue, Suite 212 • Torrance, California 9u:iol A 1,An).12.n..iinn !nine. California (9-0).150-21M A in Diego, California www.GroupDella.com • Winterization Evaluation Letter Poppy Trail Landslide Rolling Hills, California View of covered landslide. #1 Poppy Trails Owners Easement in background (note tears in cover). Close up view of torn fiber blanket and black plastic covers. :!70 4/nap/hi Acenue, Sui:. . • A In-aie. California January 19, 2010 Page 5 a (3110 320-5100 voice • (310) 320.211 • San Utego. California (858) 524-1500 tug .(;),,:y,l)elia.eom GROUT' DELTA Winterization Evaluation Letter Poppy Trail Landslide Rolling Hills, California January 19, 2010 Page 6 Overall view of the landslide during GDC's site visit (01-19-10). 370 .4rnapla Arenue. Suite 212 • Torrance. California 9(1501 • (3110320.51W ;MCC • Plat 420-211.5 MA brine, California (9491 450-21011 • San Diego. ('alijurnia (83.9524-150 trutr.Grou pl)ella.eanl • c ►. City 0//e014.9 • INCORPORATED JANUARY 24, 1957 September 29, 2009 Mr. James M. Hester Associate Attorney McCarthy & Holthus, LLP 1770 Fourth Avenue • San Diego, CA 92101 Dear Messrs. Hester and Beidleman: NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 (310) 377.1521 FAX: (310) 377.7288 Mr. Eric Von Beidleman Vice President, Special Assets Officer Far East National Bank 977 N. Broadway, Suite 401 Los Angeles, CA 90012 Enclosed you will find a letter from Group Delta, a geotechnical engineering firm used by the City to assess the landslide on 1 Poppy Trail. Per their letter, the cost of reading the two remaining inclinometers is $1,580 and, to assess the current condition of the winterization measures, they would charge $1,350. These are additional costs for you to consider with the winterization repairs previously forwarded to you. Please advise us of your intentions. City Manager AD:hl 09-29-091 PoppyTrailWinterization2.doc c: Michael Jenkins, City Attorney Ed Richards, Kutak Rock Printed on Recycled Paper • f • rtifit'd MBE Anton (Tony) Dahlerbruch City Manager City of Rolling Hills 2 Portuguese Bend Road Rolling Hills, CA 90274 Subject: Proposal for Inclinometer Reading And Updated Winterization Evaluation letter Poppy Trail Landslide Rolling Hills, California Mr. Dahlerbruch, September 28, 2009 Group Delta Consultants, Inc. (GDC) is pleased to provide our cost estimate and scope of work for the subject project. Background GDC has previously installed 2 inclinomters for moniroting of the Poppy Trail Landslide in 2005. Due to movement of the landslide, one of the inclinometers could not be read by 2006. The 2 remaning monitors were read periodically through July 2007, at which time monitoring was discontinued due to the fact that the monitoring showed that the movement had become negligible. Based on our recent discussions with you, we understand that you would like and updated reading of the 2 inclinomteres. In addition, you have requested that the winterization measures installed in 2005, and upgraded in 2006, be evaluated for suitability for the upcoming winter rains. .i,1-?!tn>lu:Iseriirt'.Suifr212 3 Ti>rrufce.('ulifurnia!?115(11 ♦ (310) 3311.511i(?,'uir A (.:110,1320.211,i' !7:A. 1: tine- Gilifornin (9-1:1)450-2100 • ail Diego, California i50 521-15w, (411vi-Groupne1Ea-ev;n • • L-599 Poppy Trail Read Inclinomters 2009.doc Page 2 September 28, 2009 Task 1 - Inclinometer Monitoring The 2 inclinometers will be monitored once in approximately October 2009. A submittal will be issued after the visit detailing the previous and new readings. Task 2 — Winterization Evaluation A site reconnaissance will be performed to evaluate the condition of the winterization measures installed in 2005 and 2006. We will utilize the plans prepared by Bolton Engineering from 2005, as well our knowledge of additional measures installed in 2006, to evaluate whether repairs or replacement are needed of those measures. The results will be summarized in a letter. Cost Proposal Our cost proposal is provided in the following Table 1. Supplemental services will be provided, as needed, on a time and materials basis in accordance with our standard Schedule of Fees (Attachment A). - Inclinometer Reading and Letter Task' y Number Rate Units Total Staff Engineer 6 $115.00 hour $690.00 Senior Engineer - letter 4 $185.00 hour $740.00 Admin - letter 2 $75.00 hour $150.00 TOTAL $1,580.00 - Winterization update letter Task Number Rate Units Total Project Engineer - field reconn 4 $115.00 hour $460.00 Senior Engineer - letter 4 $185.00 hour $740.00 Admin - letter 2 $75.00 hour $150.00 TOTAL $1,350.00 (:;ROUT' T)El.'T`.\i CONSULTANTS • • L-599 Poppy Trail Read Inclinomters 2009.doc Page 3 September 28, 2009 Closing We look forward to starting work on this project. Please feel free to call me (Office 310-329-5100) if you have any questions or require any additional information. Very truly yours, Group Delta Consultants, Inc. Michael D. Reader, P.E., G.E. Principal Engineer/ CEO Attachment A: Standard Fee Schedule • • L-599 Poppy Trail Read Inclinomters 2009.doc September 28, 2009 GROUP DELTA CONSULTANTS, INC. 2009 FEE SCHEDULE HOURLY CHARGES FOR PERSONNEL Page 4 SENIOR PRINCIPAL ENGINEER/GEOLOGIST $ 225 PRINCIPAL ENGINEER/GEOLOGIST 180 ASSOCIATE ENGINEER/GEOLOGIST 160 SENIOR ENGINEER/GEOLOGIST 145 PROJECT ENGINEER/GEOLOGIST 130 STAFF ENGINEER/GEOLOGIST 115 SENIOR TECHNICIAN/PREVAILING WAGE 95 TECHNICIAN 75 DESIGNERALLUSTRATOR/AUTOCAD 85 TECHNICAL SUPPORT 65 CHARGES FOR EQUIPMENT VEHICLE: Vehicles $ 8.00/hour Mileage $ 0.51/mile NUCLEAR DENSITY GAUGE $ 8.00/hour OTHER CHARGES Outside services will be charged at cost plus 15 percent. Technician and support personnel time for work over eight (8) hours per day will be charged at 1.25 times the regular rates. Holidays and weekends hours (all hours) will be charged 1.50 times the regular rates. LITIGATION FEES Fees for participation in deposition, arbitration, trial, etc., will be charged at an hourly rate of $300.00 per hour, 4 -hour minimum, portal to portal. TERMS & CONDITIONS .RECOGNITION OF RISK • • L-599 Poppy Trail Read lnclinomters 2009.doc Page 5 September 28, 2009 Client recognizes that the interpretations and recommendations of Group Delta Consultants, Inc. (GDC) are based solely on the information available to GDC. Client further recognizes that surface and subsurface conditions can vary from those encountered at the times and locations where data arc obtained by GDC, and that the limitation on available data results in some level of uncertainty with respect to the interpretation of these conditions despite the use of due professional care. GDC will not be responsible for the effect on any opinion rendered hereunder of unknowns such as acts of others on adjacent properties, variables of nature including but not limited to earthquakes, masking of rocks by heavy ground cover or the works of man, acts of God or other variables beyond the control of GDC. GDC shall write reports so as to meet the administrative requirements of local governmental agencies; however, as the decisions of such agencies are discretionary, GDC does not guarantee the approval of its reports or of Client's project by any governmental agency. PROFESSIONAL RESPONSIBILITY GDC represents that the services shall be performed, within the limits prescribed by Client, in a manner consistent with that level of care and skill ordinarily exercised by other professional consultants under similar circumstances. No other representations to Client, express or implied, and no warranty or guarantee is included or intended in this Agreement, or in any report, opinion, document or otherwise. INDEMNIFICATION Client agrees to indemnify, hold harmless and defend GDC from and against any and all loss, expenses, including attorney's fees, injury, damage, to property or person, liability, costs and/or claims arising out of the services performed by GDC and/or work performed by client and/or other parties upon the real property described herein above, regardless of the negligence of GDC, its agents, employees, officers, directors or shareholders, extent where such loss, injury, damage, liability, cost, expenses or claims are the result of the sole negligence or willful misconduct of GDC, its agents, employees, officers, directors or shareholders; provided, however, that any such liability resulting from any design defects (as defined in California Civil Code Section 2782.5) shall be the sole responsibility of the client. LIMITATION OF LIABILITY In the event the indemnification clause contained herein is found to be void, unenforceable, against public policy or otherwise inapplicable to claims advanced against GDC by Client or others, the liability for damages due to the professional negligence of GDC shall be limited to an amount not to exceed $50,000 or the fee of GDC, whichever sum is more. For any damage caused by negligence other than professional negligence, GDC's liability, including that of its employees, agents and subcontractors, in the aggregate trader this Agreement, shall not exceed the limits of GDC's comprehensive general and automobile liability insurance coverage. In no event shall either GDC or Client be liable for consequential damages, including, without limitation, loss of use, loss of profits or the additional costs of completing the development of the property described herein above due to delays, incurred by one another or their respective subsidiaries or successors, regardless of whether such claim is based upon alleged breach of contract, willful misconduct or negligent act or omission, whether professional or non- professional, of either of them or their agents, employees, subcontractors, officers, directors or shareholders. METHOD OF CHARGING AND PAYMENT CONDITIONS GDC will submit the invoices to Client as stated in the proposal or periodically and a final invoice will be submitted upon completion of our services. All retainers are held for credit to the final invoice. Payment is due upon presentation of invoice and is past due thirty (30) days from invoice date. Client agrees to pay a finance charge of one and one-half percent (1-l/2%) per month, or the maximum rate allowed by law, on past due accounts. Payments shall first be applied to accrued interest and to the principal unpaid amount. Client specifically agrees further to pay all expenses and costs, including but not limited to GDC's staff time at GDC's current Schedule of Fees, attorneys' fees, and court and other costs associated with collection of past due accounts. Initial __ If any invoice for work performed by GDC is outstanding and unpaid for a period in excess of 90 (ninety) days, the Client agrees that, in addition to any other remedy which may be available to it, GDC may stop work, withhold reports/plans, and submit such invoice to binding arbitration under the Commercial Arbitration Rules of the American Arbitration Association, as the same may be in effect at the date of such submission, and that judgment upon the award rendered in such arbitration may be entered in any court having jurisdiction thereof. 1c RC)U l'k 11) F: L`1'A' IEDMIESMEt ESTIMATED CHARGES AND PAYMENT CONDITIONS • . 1 L-599 Poppy Trail Read lnclinomters 2009.doc Page 6 September 28, 2009 GDC charges are only estimated and shall not he regarded as "lump sum" or "fixed price" or "guaranteed maximum" compensation unless it is expressly so stated in writing. ESTIMATED TIME SCHEDULE Because of the uncertainties inherent in the services contemplated hereunder, time schedules are only estimated schedules which are subject to revision unless specifically described as otherwise herein. RIGHT OF ENTRY The Client will provide for right of entry for GDC personnel, and for any other personnel and all equipment necessary in order to complete the work. While GDC will take all reasonable precautions to minimize any damage to the property, it is understood by Client that in the normal course of work some damage may occur, the correction of which is not part of this Agreement. The client agrees to indemnify and hold GDC harmless from any liability for any damage so caused by the performance of such work, unless caused by the gross negligence or willful misconduct of GDC or its personnel. SUBTERRANEAN STRUCTURES OR UTILITIES Client shall indemnify and hold GDC harmless for damage or injury arising from damage to subterranean structures or utilities (pipes, tanks, telephone cables, etc.) that are not called to the attention of GDC or are not correctly shown on the plans furnished to GDC, in connection with work performed by GDC. CONSTRUCTION PROCEDURES GDC shall not specify construction procedures, manage or supervise construction, or implement or be responsible for health and safety procedures; shall not he responsible for the acts or omissions of contractors or other parties on the project; and shall not have control or charge of and shall not be responsible for construction, means, methods, techniques, sequences or procedures, or for safety precautions and programs. GDC testing or inspection of portions of the work of other parties on project shall not relieve such other parties from their responsibility for performing their work in accordance with applicable plans and specifications. SAMPLES GDC will retain all soil and rock samples for thirty (30) days following exploration. Further storage or transfer of samples can be made at an agreed expense upon Client's written request. HAZARDOUS SUBSTANCES Unless specifically included in the "Scope of Services," this Agreement does not include any services (including detection or identification) relative to any substances which might be considered hazardous by an applicable regulations. OWNERSHIP OF DOCUMENTS All reports, boring logs, field data and notes, laboratory test data, calculations, estimates and other documents prepared by GDC, as instruments of service, shall remain the property of GDC. Client agrees that all reports and other work furnished to the Client or its agents, which are not paid for, will be returned upon demand and will not be used by the Client for any purpose whatever. NO THIRD PARTY RIGHTS This Agreement shall not create any rights or benefits to parties other than Client and GDC. TIME BAR TO LEGAL ACTION All legal actions by either party against the other for breach of this Agreement, or for failure to perform in accordance with the applicable standard of care, however denominated, that are essentially based on such breach or failure, shall he barred in two (2) years from the time claimant knew or should have known of its claim, but, in any event, not later than four (4) years from the substantial completion of GDC's services. Initial DISPUTES In the event that a dispute arises relating to the performance of the services to be provided under this Agreement, and should that dispute result in litigation, it is agreed that the prevailing party shall be entitled to recover all reasonable costs incurred in connection with such dispute, including GDC's staff time at GDC's Schedule of Fees in effect at the time of such dispute, court costs, attorneys' fees and all other claim related expenses. (IR(.) UP Initial INIMULECEEI Subj: Inclinometer Reading, Poppy Trail 5-15-06 Date: Tuesday, May 16, 2006 10:36:01 AM From: stevek@groupdelta.com To: RayFerr@cox.net, Cityofrh@aol.com cc: MikeR@groupdelta.com FYI Steven H. Kolthoff, CEG Associate Geologist Group Delta Consultants, Inc 2291 W. 205th Street, Suite 105, Torrance, CA 90501 Office phone : 310-320-5100 Cell phone : 310-629-9281 Fax : 310-320-2118 E-mail : stevek@groupdelta.com Headers Return -Path: <stevek@groupdelta.com> Received: from rly-xn05.mx.aol.com (rly-xn05.mail.aol.com [172.20.83.118]) by air-xn02.mail.aol.com (v109.12) with ESMTP id MAILINXN21-64d446a0d4e27f; Tue, 16 May 2006 13:36:00 -0400 Received: from mai1846.megamailservers.com (mai1846.carrierinternetsolutions.com [69.49.106.56]) by rly-xn05.mx.aol.com (v109.12) with ESMTP id MAILRELAYINXN53-64d446a0d4e27f; Tue, 16 May 2006 13:35:10 -0400 X -Authenticated -User: gdctorrance.covad.net Received: from HP34251287617 (h-66-166-215-213.Isanca54.covad.net [66.166.215.213]) (authenticated bits=0) by mai1846.megamailservers.com (8.13.6/8.13.1) with ESMTP id k4GHKjc4020709; Tue, 16 May 2006 13:20:49 -0400 From: "Steven Kolthoff' <stevek@groupdelta.com> To: "Ray Ferris" <RayFerr@cox.net>, "Craig Nealis" <Cityofrh@aol.com> Cc: "Mike Reader" <MikeR@groupdelta.com> Subject: Inclinometer Reading, Poppy Trail 5-15-06 Date: Tue, 16 May 2006 10:20:46 -0700 Message -ID: <PKEPIECGLAHBIDCNDNMAKEGBCIAA.stevek@groupdelta.com> MIME -Version: 1.0 Content -Type: multipart/mixed; boundary="----=_NextPart_000_003D_01 C678D2.65630010" X -Priority: 3 (Normal) X-MSMail-Priority: Normal X -Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) 5/16/06 America Online : Cityofrh Page 1 IGROUP DELTA rionmuni r >eotechn:cal Engineering Geology Hydro Geology Earthquake Engineering R4aterials Testing Inspection Forensic Services May 15, 2006 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Craig Nealis, City Manager Subject: May 15, 2006 Inclinometer Readings Poppy Trail Landslide Rolling Hills, California Mr. Nealis: Group Delta Consultants, Inc. (Group Delta) collected inclinometer readings on May 15, 2006 to establish a baseline for the pre -construction for the placement of a stability fill above the wall on the temporarily access road and to measure any creep, after this last winters rainstorms. Data was collected at the replacement inclinometer (PT -2R) and PT -3 on the temporary ATV access road on February 4, 13, 21, March 6 and May 15, 2006. PT -2R inclinometer had a cumulative movement of about 0.4 -inches between February 4 and May 15, 2006 indicating that the landslide still has very slow creep. PT -3 is off the new landslide mass and has very minimal to no movement (see attached graph PT -2R A -axis, downhill direction and PT -3). Since movement on the landslide has slow creep, additional readings shall be scheduled weekly until the completion of the stability fill. During this summer, readings can be terminated unless movement of the landslide increases or there was acceleration of the creep after the stability fill construction. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist CC: Ray Farris 2291 W. 205th Street, Suite 105 • Torrance, CA 90501-1459 • Te1(310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo+ (949) 609-1020 ♦www.GroupDelta.com♦ San Diego♦ (858) 524-1500 20 -1 00 POPPY PT -2R, A -Axis 0.00 -0-- 2/4/2906 - 2/13/2006 -a- 2/21/2006 --6 3/6/2006 5/15/2006 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 10 20 - r ai 2 30 - Y a) ci 40 50 - 60 POPPY PT -2R, B -Axis -0- 2/4/2906 - 2/13/2006 - 0- 2/21/2006 -fl- 3/6/2006 -0- 5/15/2006 0.50 1.00 -1 00 -0.50 0.00 Cumulative Displacement (in) from 2/4/2006 `GROUP Poppy Trail Landslide Rolling Hills, CA LTA Inclinometer PT -2 R May 15, 2006 50 -0 50 POPPY PT -3, A -Axis 0.00 0.50 ▪ 9/6/2005 - 9/6/2005 -u- 9/8/2005 -A- 9/16/2005 - 9/19/2005 - 9/20/22005 - 9/20/2005 - 10/3/2005 - 10/12/2005 -0- 10/18/2005 -A- 10/24/2005 -0- 11/11/2005 11/18/2005 - 11/26/2005 -V- 11/28/2005 -0-- 12/1/2005 -D- 2/5/2006 -8- 2/13/2006 - 2/21/2006 - 3/6/2006 - 5/15/2006 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 5 10 15 20 -I t 25 0. a) 0 30 35 40 - 45 50 -0 50 0.00 0.50 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, B -Axis - Q- 9/6/2005 -0- 9/6/2005 - 13- 9/8/2005 -0- 9/16/2005 - 9/19/2905 -x- 9/20/2005 - 9/20/2005 - v- 10/3/2005 -0-- 10/12/2005 - 10/18/2005 -A- 10/24/2005 -0- 11/11/2005 11/18/2005 11/26/2005 -v- 11/28/2005 -0-- 12/1/2005 -0- 2/5/2006 -6- 2/13/2006 - 0- 2/21/2006 3/6/2006 — 5/15/2.006 GROUP': Poppy Trail Landslide Rolling Hills, CA Installation PT -3 May 15, 2006 Subj: Inclinometer Reading, Poppy Trail 5-15-06 Date: Tuesday, May 16, 2006 10:36:01 AM From: stevek@groupdelta.com To: RayFerr@cox.net, Cityofrh @aol.com cc: MikeR@groupdelta.com FYI Steven H. Kolthoff, CEG Associate Geologist Group Delta Consultants, Inc 2291 W. 205th Street, Suite 105, Torrance, CA 90501 Office phone : 310-320-5100 Cell phone : 310-629-9281 Fax : 310-320-2118 E-mail : stevek@groupdelta.com ------------- Headers -- Return-Path: <stevek@groupdelta.com> Received: from rly-xn05.mx.aol.com (rly-xn05.mail.aol.com [172.20.83.118]) by air-xn02.mail.aol.com (v109.12) with ESMTP id MAILINXN21-64d446a0d4e27f; Tue, 16 May 2006 13:36:00 -0400 Received: from mai1846.megamailservers.com(mai1846.carrierinternetsolutions.com [69.49.106.56]) by rly-xn05.mx.aol.com (v109.12) with ESMTP id MAILRELAYINXN53-64d446a0d4e27f; Tue, 16 May 2006 13:35:10 -0400 X -Authenticated -User: gdctorrance.covad.net Received: from HP34251287617 (h-66-166-215-213.Isanca54.covad.net [66.166.215.2131) (authenticated bits=0) by mai1846.megamailservers.com (8.13.6/8.13.1) with ESMTP id k4GHKjc4020709; Tue, 16 May 2006 13:20:49 -0400 From: "Steven Kolthoff" <stevek@groupdelta.com> To: "Ray Ferris" <RayFerr@cox.net>, "Craig Nealis" <Cityofrh@aol.com> Cc: "Mike Reader" <MikeR@groupdelta.com> Subject: Inclinometer Reading, Poppy Trail 5-15-06 Date: Tue, 16 May 2006 10:20:46 -0700 Message -ID: <PKEPIECGLAHBIDCNDNMAKEGBCIAA.stevek@groupdelta.com> MIME -Version: 1.0 Content -Type: multipart/mixed; boundary="----=_NextPart_000_003D_01 C678D2.65630010" X -Priority: 3 (Normal) X-MSMail-Priority: Normal X -Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) 5/16/06 America Online : Cityofrh Page 1 (4_ - GROUP .DELTA May 15, 2006 City of Rolling Hills No. 2 Portuguese Bend Road tokkuk sati Rolling Hills, CA 90274 Attention: Craig Nealis, City Manager Subject: May 15, 2006 Inclinometer Readings Poppy Trail Landslide Rolling Hills, California - Mr. Nealis: Group Delta Consultants, Inc. (Group Delta) collected inclinometer readings on May 15, 2006 to establish a baseline for the pre -construction for the placement of a stability fill above the wall on the temporarily access road and to measure any creep, after this last winters rainstorms. Data was collected at the replacement inclinometer (PT -2R) and PT -3 on the temporary ATV access road on February 4, 13, 21, March 6 and May 15, 2006. PT -2R inclinometer had a cumulative movement of about 0.4 -inches between February 4 and May 15, 2006 indicating that the landslide still has very slow creep. PT -3 is off the new landslide mass and has very minimal to no movement (see attached graph PT -2R A -axis, downhill direction and PT -3). Since movement on the landslide has slow creep, additional readings shall be scheduled weekly until the completion of the stability fill. During this summer, readings can be terminated unless movement of the landslide increases or there was acceleration of the creep after the stability fill construction. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist CC: Ray Farris '_'29l W.2(1j Street. Sttlti 10' • ]orrance.(.\`Y,rd,1-145i ♦ .1 el 310t 320-5100 ♦ i'axl ;lt1) 320-2118 :\lisc \'icio+ 1St-ttii ( -1Nt9-102i,p ♦www.GrottpDelta.com♦ S::n l)le t ♦ ( � � l•; t 0 10 20 POPPY PT -2R, A -Axis a> c 30 a> a 40 50 60 -100 -0.50 0.00 -a-- 2/4/2006 -0- 2/13/2006 -0- 2/21/2006 --6- 3/6/2006 -0- 5/15/2006 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 POPPY PT -2R, B -Axis 0 10 20 c 30 40 50 ▪ 2/4/2006 -0- 2/13%2006 - 2/21/2006 -n-- :3/6/2006 - o- ;5/15/2006 60 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -2 R May 15, 2006 , 0 5- 10 15 20 s 25 0 a> a 30 35 40 45 50 -0 50 0.00 0.50 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, A -Axis -9-- 9/6/2005 --0- 9/6/2005 - 9/8/2005 -6- 9/16/2005 - 0- 9/19/2005 -K- 9/20/2005 - - 9/20/2005 - 10/3/2005 - 10/12/2005 - 10/18/2005 -6- 10/24/2005 - 0- 11/11/2005 --4- 't 1 /18/2005 — 11/26/2005 - 11/28/2005 - 0- 12/1/2005 2/5/2006 - 6- 2/13/2006 • -°- 2/21/2006 - 3/6/2006 -4- 5/15/2006 1.00 1.50 5- 10 15 20 r 25 n. U, 0 30 35- 40 45 50 -0 50 0.00 0.50 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, B -Axis -0-- 9/6/2005 -0- 9/6/2005 - 0- 9/8/2005 -6- 9/16/2.005 -0- 9/19/2005 - -4- 9/20/2005 — 9/20/2005 -0- 10/3/2005 o- 10/12/2005 -0- 10/18/2005 -a- 10/24/2005 -0- 11/11/2005 11/18/2005 - 11/26/2005 - µ- 11/28/2005 -o- 12/1/2005 -a- 2/5/2006 -0- 2/13/2006 - 2/21/2006 -4- 3/6/2006 — 5/15/2:006 Poppy Trail Landslide Rolling Hills, CA Installation PT -3 May 15, 2006 GROUP .DELTA' riermllarm July 30, 2007 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Tony Dehlerbruch, City Manager Subject: July 30, 2007 Inclinometer Readings Poppy Trail Landslide Rolling Hills, California Project# L-599 D4 Mr. Dehlerbruch: v 7 2007 hIJ� CITY OF ROLLING HILLS By Group Delta Consultants, Inc. (Group Delta) is continuing to monitor the two inclinometers on the new Poppy Trail Landslide and on the inactive landslide adjacent to the Poppy Trail Landslide. On July 30, 2007 Group Delta monitored and provided this updated report with inclinometer PT -2R and PT -3 on the Poppy Trail temporary ATV access road. Inclinometer PT -2R had additional movement from the last reading from March 23, 2007 to July 30, 2007 of about 0.15 -inch in 4 -months indicating that the Poppy Trail Landslide still has an insignificant creep. PT -3 is on the older (presently inactive) landslide mass which is stable (see attached graphs PT -2R and PT -3, A -axis, downhill direction). Since movement on the Poppy Trail Landslide has been insignificant since the past few readings, future monitoring shall continue to be scheduled every one to four months to determine further movement of the landslide or until no further landslide movement is detected. If a series of large rainstorms develop at the site in the future, the inclinometer monitoring may be re -scheduled to twice a month and during the rainy periods. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist _2'`+l W. »)5 `l 9050) -i^•9 P I c' !1 n; lw i.2r1-21}X > titreC:t. Suits 105 ♦ loll r. C'.1 .. 1 1 1 t > 1 i . � } r,t' s F�:. i l': Also \'ie o+ It) -19t 6(0-102+1 ♦www.GroupDclta.com♦ - ?3 });c o+ !` i5; •'-1-1ci1';1 -00 0 10 20 c c 30 a▪ ) 0 40 50 60 -1.0 0 0 1.0 2.0 Cumulative Displacement (in) from 2/4/2006 POPPY TRAIL PT -2R, A -Axis 2/4/2006 - 2/13/2006 - 0-- 2/21/2006 .. _ . _ _x' 3/6/2006 • ' --o- 5/15/2006 5/23/2006 6/22/2006 - 7/11/2006 7/20/2006 - 8/2/2006 - 8/112006' --o- 8/17/2006 — 9/20/2006 -* 12/18/2006 -7-- 2/9/2007 - 0- 3/23/2007 -a- 7/30/2007 POPPY TRAIL PT -2R, B -Axis 10 20 40 50 60 -1.00 -0.50 -7-- 2/4/2006 2/13/2006 ▪ 2/21/2006 . 3/6/2006 "' - 0- 5/15/2006 5/23/2006 - 6/22/2006 7/11/2006 - 0-- 7/20/2006 - o- 8/2/2006 -a- 8/1112006 -0- 8/17/2006 --- 9/20/2006 - 12/18/2006 - 2/9/2007 - 0- 3/23/2007 -0- 7/30/2007 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hils, CA Inclinometer PT -2R July 30, 2007 0 5 10 15 20 m a) 25 - Q a) 0 30 35 40 - 45 - POPPY PT -3, A -Axis -0- 9/6/2005 9/6/2005 - 9/8/2005 -0- W16/2005 - 9/19/2005 - 9/20/2005 - 9/20/2005 - ¢ 10/3/2005 10/1.2/2005 - -- 10/18/2005 -A- 10/24/2005 -0- 11/11/2005 -x- 11/18/2005 - 11/26/2005 -0- 11/28/2005 - 12/1/2005 -0- 9/20/2006 - 6- 12/18/2006 2/9/2007 - - 3/23/2007 - 7/30/2007 50 -0.50 0.00 0.50 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 0 5 10 15 20 c _c 25 a 0 30 35 40 45 50 POPPY PT -3, B -Axis 9/6/2005 - - - - 9/6/2005 - 0- 9/8/2005 - 9/16/2005 - 9/19/2005 9/20/2005 - 9/20/2005 �- 10/3/2005 10/1.2/2005 -0- 10/18/2005 - 10/24/2005 - 11/11/2005 11/18/2005 -- 11/26/2005 -0- 11/28/2005 2/1/2005 - 9/20/2006 -0- 12/18/2006 • 2/9/2007 - 3/23/2007 --,- 7/30/2007 -0.50 0.00 0.50 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 Poppy Trail Landslide Rolling Hills, CA Installation PT -3 July 30, 2007 GROUP • DELTA March 23, 2007 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Tony Dehlerbruch, City Manager Subject: March 23, 2007 Inclinometer Readings Poppy Trail Landslide Rolling Hills, California Project# L-599 D4 Mr. Dehlerbruch: Group Delta Consultants, Inc. (Group Delta) is continuing to monitor the two inclinometers on the new Poppy Trail Landslide and on the inactive landslide adjacent to the Poppy Trail Landslide. On March 23, 2007 Group Delta monitored and provided this updated report with inclinometer PT -2R and PT -3 on the Poppy Trail temporary ATV access road. Inclinometer PT -2R had additional movement from the last reading from February 9, 2007 to March 23, 2007 of about 0.1 -inch indicating that the Poppy Trail Landslide still has an insignificant creep. PT -3 is on the older (presently inactive) landslide mass is stable (see attached graphs PT -2R and PT -3, A -axis, downhill direction). Since movement on the Poppy Trail Landslide has been insignificant since the past few readings, future monitoring shall continue to be scheduled every one to two months to determine further movement of the landslide or until no further landslide movement is detected. If a series of large rainstorms develop at thesite in the future, the inclinometer monitoring may be re -scheduled to twice a month during the rainy periods. During the monitoring of the inclinometers, it was noticed that the construction of the new geofabric covering of the Poppy Trail Landslide was completed. The contractor did an appropriate job covering and fastening the fabric to the landslide surface with a good overlap on the Poppy Trail Landslide edge. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist __'I \V._ :i!'c'il `I I 11..5 ` I 'ii:uli: (`\.,.." .I � 1`i _i,.♦ , ;�,,; ,,r,,;_I;, „ ♦www.Grou Deltacom+ ,;; 1 tip ;N, 5'.i_;';,,, POPPY TRAIL PT -2R, A -Axis 0 -- 10 20 • - 0 401 50 601-- -1.0 00 2/4/2006 2/13/2006 -° 2/21/2006 3/6/2006 • 5/15/2006 — 5/23/2006 — 6/22/2006 f-,•-• 7/11/2006 - 7/20/2006 -°- 8/2/2006 - .8/11/2006 8/17/2006 9/12/2006 9/20/2006 12/18/2006 - 2/9/2007 70- 3/23/2007 1 1.0 2.0 Cumulative Displacement (in) from 2/4/2006 Oj 10 20 a) a) 30 n a) 0 40 50 POPPY TRAIL PT -2R, B -Axis 60 -k- ; • • • • • - - --- - 2/ --- 2/13/2006 -0- 2/21/2006 3/6/2006 • - - 5/15/2006 • --- 5/23/2006 -- 6/22/2006 7/11/2006 7/20/2006 - 8/2/2006 8/11/2006• 8/17/2006 — 9/12/2006 9/20/2006 -0-- 12/18/2006 2/9/2007 -0- 3/23/2007 J -1.00 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hils, CA Inclinometer PT -2R March 23, 2007 POPPY PT -3, A -Axis 01 I 0 5 10 15 20 a) � 25 a a) a 30 35 40 45 50 1 i -0.50 0.00 0.50 Cumulative Displacement (in) from 9/6/2005 - 9/6/2005 9/6/2005 9/8/2005 9/16/2005 9/19/2005 9/20/2005 9/20/2005 10/3/2005 10/12/2005 10/18/2005 10/24/2005 11/11/2005 11/18{2005 11/26/12005 -9- 11/28/2005 12/1/2005 -a- 9/12/2006 - 9/20/2006 - 12/18/2006 2/9/2007 - 3/23/2007 1.00 1.50 5 10 15 20 C r • 25 30 35 40 45 50 -0.50 0.00 0.50 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, B -Axis -9- 9/6/2005 - - 9/6/2005 • -0- 9/8/2005 9/16/2005 - 9/19/2005 — 9/20/2005 9/20/2005 - ¢ 10/3/2005 -- 10/12/2005 -a- 10/18/2005 10/24!2005 11/11/2005 11/18/2005 — 11/26/2005 -Q- 11/28/2005 --- 12/1/2005 - n- 9/12/2006 -6- 9/20/2006 -0- 12/1812006 2/9/2007 — 3/23/2007 Poppy Trail Landslide Rolling Hills, CA Installation PT -3 March 23, 20067 i DELTA mo March 5, 2007 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Tony Dehlerbruch, City Manager Subject: February 9, 2007 Inclinometer Readings Poppy Trail Landslide Rolling Hills, California Project# L-599 D4 Mr. Dehlerbruch: Group Delta Consultants, Inc. (Group Delta) collected inclinometer readings on February 9, 2007 to provide an updated report for the monitoring of inclinometer PT -2R and PT -3 on the Poppy Trail temporary ATV access road. Inclinometer PT -2R had a cumulative movement of about 1.0 -inch from February 4, 2006 to February 9, 2007 indicating that the Poppy Trail Landslide still has a very slow creep. PT -3 is on an older (presently inactive) landslide mass (see attached graphs PT - 2R and PT -3, A -axis, downhill direction). Since movement on the Poppy Trail Landslide was very slow during monitoring last year, readings shall be scheduled one to 2 months to determine further movement of the landslide or until no further landslide movement is detected. If a series of large rainstorms develop at the site during the future, the inclinometer readings may be re- scheduled twice a month during the rainy periods. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist 2291 \\.2O5` slreCl. Sink 105 ♦ I offank.-e. CA 90501-1459 • Td 3191329-51(.0 t Rix (3l0) 32(1-2115 Aliso Viejo ♦ ( 949) 609-1020 ♦ `yww.GroupDeltacom♦ S:ui Dig zo ♦ ( 858 524-15(0 ' a) 0 POPPY TRAIL PT -2R, A -Axis 10- 20 - 30 I 0_ a) 0 40 50 - 2/4/20.06 2/13/2006 -•J- 2/21/2006 3/6/2006 - 0- 5/15/2006 - 5/23/2006 — 6/22/2006 7/11/2006 --0- 7/20/2006 8/2/2006 ▪ 8%1172006 8/17/2006 - 9/9/2006 9/12/2006 • 9/20/2006 • 12/18/2006 -0- 2/9/2007 60 • -1 00 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 0 10- 20 40 - 50 60 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 POPPY TRAIL PT -2R, B -Axis --0 2/4/2006 2/13/2006 2/21/2006 3/6/2006 - •' - 0- 5/15/2006 5/23/2006 - 6/22/2006 - - 7/11/2006 - 0-- 7/20/2006 8/2/2006 ;= 8%11/2006. 8/17/2006 9/9/2006 a- 9/12/2006 -9- 9/20/2006 /2/1812006 - 0- 2/9/2007 Poppy Trail Landslide Rolling Hits, CA Inclinometer PT -2R February 09, 2007 d; a) POPPY PT -3, A -Axis s 25 a> 0 50 -0.50 0.00 Cumulative Displacement (in) from 9/6/2005 • --v--- 9/6/2005 - - 9/6/2005 } 9/8/2005 9/16/2005 9/19/2005- 9/20/2005 — 9/20/2005 10/3/2005 -4-- 10/12/2005 10/18/2005 - 10/24/2005 11/11//2005 11/1812005 — 11/26/2005 -4- 11/28/2005 12/1/2005 - a- 9/9/2006 9/12/2006 9/20/2006 12/18/2006 - 2/9/2007 1.00 1.50 0.50 0 5 10 15 20 30 35 40 45 POPPY PT -3, B -Axis 50 -0 50 0.00 0.50 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 - 9/6/2005 - 9/6/2005 _= 9/8/2005 9/16/2005 -0- 9/19/2005- - - 9/20/2005 — 9/20/2005 - 10/3/2005 -0- /0/1212005 10/18/2005 • 10/24/2005 11/11/2005 11/102005 --- 11/26/2005 -o- 11/28/2005 12/1/2005 - 0 - 9/9/2006 9/12/2006 O 9/20/2006 12/18/2006 — 2/9/2007 Poppy Trail Landslide Rolling Hills, CA Installation PT -3 February 09, 20067 • GROUP City of Rolling Hills 2 Portuguese Bend Rd. Rolling Hills, CA 90274-5171 DELTA Attention: Mr. Anton Dahlerbruch February 7, 2007 (revised) Subject: Proposal To Continue Inclinometer Monitoring Poppy Trail Landslide Near the Intersection of Portuguese Bend Road and Poppy Trail Rolling Hills, California Mr. Dahlerbruch: At your request, this proposal addresses the need for continued inclinometer monitoring, plotting of the results and presenting the data to the city in memorandum form. This proposal includes our proposed scope of work and the associated budget. 1.0 SITE DESCRIPTION A portion of Poppy Trail has been over -ridden by slide debris, which blocked access to the residences down canyon from the landside. To open the canyon to vehicular traffic, an alternate alignment has been constructed below the toe of the landslide. During the construction of the alternate ATV road, three inclinometers were installed with two installed in the Poppy Trail Landslide. During the construction on the back scarp of the landslide, to help stabilize the landslide, the two inclinometers in the landslide mass sheared off from heavy equipment movement. An additional inclinometer (P -2R) was installed in the middle of the Poppy Trail Landslide, on the temporary ATV road, so any continued movement could be monitored. 2.0 SCOPE OF SERVICES 2.1 Continued Inclinometer Readings It is proposed to continue monitoring the inclinometers. • Our access to the property and work schedule will be coordinated through your designated representative to minimize any impact on existing activities. • Staff level GDC personnel will monitor the inclinometers every two weeks or as needed during any construction on or near the landslide, during the rainy season or if the landslide movement seems to be accelerating. _2`'l \\._t, }i!r�l,Sloe ''f;♦ 1•. !t:t;i .( :\s,,•'_ 'i-14:,? ♦ "1cit=1!•, ' !s}tl ♦ l.::. i Zli'. . '-_ij�; .11js \ i, j:'•♦ t.yii } Id"' i''^!' ♦wv[w.Groupeh .com♦ S i!7 ! )!t,_ ♦ t ``X) 5_ - 15! • • GROUP r DELTA toAYainab1 Proposal to continue inclinometers monitoring Poppy Trail Landslide Rolling Hills, California (revised) February 7, 2007 Page 2 • During dry months, such as summer, the inclinometer monitoring will be reduced to once a month if the landslide seems to be stable. The monitoring will be more frequent if the landslide movement increases. The data collection and reduction of the data shall be reviewed by a GDC engineer or geologist. 3.0 TIME SCHEDULE We will commence our work upon receipt of your Notice to Proceed (NTP). The following time schedules are estimated to complete the proposed tasks described in this proposal. 4.0 ESTIMATED FEE We propose to perform the above Scope of Work to monitor the inclinometers on a time -and -materials basis with a not -to -exceed amount of $10,000. The task will consist of 4 hours of fieldwork including travel from the office and back by a staff person qualified to monitor inclinometers and office time including data reduction, review and a letter memorandum. The following table summarizes the breakdown of the estimated fee for this task. Task Fee Type Field Monitoring, Staff Engineer $110x4 hr = $440 T&M Review of Monitoring, Project or above $155x2 hr = $310 T&M Memo and Graph, Staff and Associate ($110+$155)x l hr = $265 T&M Grand Total of tasks (per say) $1,000 T&M Before we proceed with any additional services, your written approval will be required. If the city needs to stop the monitoring for any reason, an email or a written notice shall be sent to GDC to put the task on hold. A similar email or written notice can be sent to re -activate the task. If the city of Rolling Hills wishes to terminate the monitoring task for any reason, the city must submit within (10) days minimum, a written notice to Group Delta Consultants, Inc. to terminate the work. INDEMNITY In agreeing to the scope of work contained in this proposal, the city if Rolling Hills acknowledges that the existing site is currently unstable and agrees to defend, indemnify and hold harmless Group Delta Consultants, Inc. its employees and subcontractors from and against any and all liability expense (including defense and legal costs) or claim for damages of any nature whatsoever, arising from or connected in anyway with the work performed for "The City" from this proposal, • i Proposal to continue inclinometers monitoring Poppy Trail Landslide Rolling Hills, California (revised) February 7, 2007 Page 3 except where such liability expense is the result of the sole negligence or willful misconduct of GDC, its agents, employees, officers, directors, shareholders or subcontractors. CLOSURE We look forward to providing you with the geological and geotechnical services for this phase of this project. Should you have any questions regarding this proposal, please feel free to contact us. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Engineering Geologist Distribution: addressee via e-mail L -599D Inclinometer Readings Proposal 1-8-07.doc GROUP DELTA t ua.1RlL1 lli • • Proposal to continue inclinometers monitoring Poppy Trail Landslide Rolling Hills, California (revised) February7, 2007 Page 4 ACCEPTANCE OF PROPOSAL AND AUTHORIZATION TO PROCEED Client*: City of Ro ing fills Name (Please Prin Anton Dahlerbruch Signature Title: City Manager Date: a/i3�o7 Address: 2 Portuguese Bend Road, Roll i ng Hills, CA 90274 Telephone No: ( 310-377-1521 FAX No: ( 310-377-7288 Invoice to be sent to the Client*, who will be responsible for the payment of services. Client's special invoicing instructions/PO Number: GROUP DELTA • Proposal to continue inclinometers monitoring Poppy Trail Landslide Rolling Hills, California (revised) TERMS & CONDITIONS - EXHIBIT I (page 1 of 2) February 7, 2007 Page 5 RECOGNITION OF RISK Client recognizes that the interpretations and recommendations of Group Delta Consultants, Inc. (GDC) are based solely on the information available to GDC. Client further recognizes that surface and subsurface conditions can vary from those encountered at the times and locations where data are obtained by GDC, and that the limitation on available data results in some level of uncertainty with respect to the interpretation of these conditions despite the use of due professional care. GDC will not be responsible for the effect on any opinion rendered hereunder of unknowns such as acts of others on adjacent properties, variables of nature including but not limited to earthquakes, masking of rocks by heavy ground cover or the works of man, acts of God or other variables beyond the control of GDC. GDC shall write reports so as to meet the administrative requirements of local governmental agencies; however, as the decisions of such agencies are discretionary, GDC does not guarantee the approval of its reports or of Client's project by any governmental agency. PROFESSIONAL RESPONSIBILITY GDC represents that the services shall be performed, within the limits prescribed by Client, in a manner consistent with that level of care and skill ordinarily exercised by other professional consultants under similar circumstances. No other representations to Client, express or implied, and no warranty or guarantee is included or intended in this Agreement, or in any report, opinion, document or otherwise. INDEMNIFICATION Client agrees to indemnify, hold harmless and defend GDC from and against any and all loss, expenses, including attorney's fees, injury, damage, to property or person, liability, costs and/or claims arising out of the services performed by GDC and/or work performed by client and/or other parties upon the real property described herein above, regardless ef--the-negligenee-ef--G herehelflersT except where such loss, injury, damage, liability, cost, expenses or claims are the result of the sole negligence or willful misconduct of GDC, its agents, employees, officers, directors or shareholders. provided howeve- that ^ . ch liability , `l bng f-- o` design defects (as defined in California Civil Code Section 2782.5) shall be the sole responsibility of the client. LIMITATION OF LIABILITY Per-ran olarfrage---c-atised-by-negli-genee-etlier-t-hati-processilanal-negligenee at-ef-its empleyeesr beempr bb b ehe ..7 ...1 ..1.:1.. 1:..7.:1: o b.. a .. b.. In no event shall either GDC or Client be liable for consequential damages, including, without limitation, loss of use, loss of profits or the additional costs of completing the development of the property described herein above due to delays, incurred by one another or their respective subsidiaries or successors, regardless of whether such claim is based upon alleged breach of contract, willful misconduct or negligent act or omission, whether professional or non- professional, of either of them or their agents, employees, subcontractors, officers, directors or shareholders. METHOD OF CHARGING AND PAYMENT CONDITIONS GDC will submit the invoices to Client as stated in the proposal or periodically and a final invoice will be submitted upon completion of our services. All retainers are held for credit to the final invoice. Payment of undisputed invoice amount is due upon presentation of invoice and is past due thirty (60) days from invoice date. Client agrees to pay a finance charge of one and one-half percent (1-1/2%) per month, or the maximum rate allowed by law, on past due accounts. Payments shall first be applied to accrued interest and to the principal unpaid amount. Client specifically agrees further to pay all expenses and costs, including but not limited to GDC's staff time at GDC's current Schedule of Fees, attorneys' fees, and court and other costs associated with collection of past due accounts. jurisdiction-thereef. GROUP r DELTA GROUP DELTA Proposal to continue inclinometers monitoring Poppy Trail Landslide Rolling Hills, California (revised) TERMS & CONDITIONS - EXHIBIT I - (page 2 of 2) February 7, 2007 Page 6 ESTIMATED CHARGES AND PAYMENT CONDITIONS GDC charges are only estimated and shall not be regarded as "lump sum" or "fixed price" or "guaranteed maximum" compensation unless it is expressly so stated in writing. ESTIMATED TIME SCHEDULE Because of the uncertainties inherent in the services contemplated hereunder, time schedules are only estimated schedules which are subject to revision unless specifically described as otherwise herein. RIGHT OF ENTRY The Client will provide for right of entry for GDC personnel, and for any other personnel and all equipment necessary in order to complete the work. While GDC will take all reasonable precautions to minimize any damage to the property, it is understood by Client that in the normal course of work some damage may occur, the correction of which is not part of this Agreement. The client agrees to indemnify and hold GDC harmless from any liability for any damage so caused by the performance of such work, unless caused by the gros n negligence or willful misconduct of GDC or its personnel. SUBTERRANEAN STRUCTURES OR UTILITIES Client shall indemnify and hold GDC harmless for damage or injury arising from damage to subterranean structures or utilities (pipes, tanks, telephone cables, etc.) that are not called to the attention of GDC or are not correctly shown on the plans furnished to GDC, in connection with work performed by GDC. CONSTRUCTION PROCEDURES GDC shall not specify construction procedures, manage or supervise construction, or implement or be responsible for health and safety procedures; shall not be responsible for the acts or omissions of contractors or other parties on the project; and shall not have control or charge of and shall not be responsible for construction, means, methods, techniques, sequences or procedures, or for safety precautions and programs. GDC testing or inspection of portions of the work of other parties on project shall not relieve such other parties from their responsibility for performing their work in accordance with applicable plans and specifications. SAMPLES GDC will retain all soil and rock samples for thirty (30) days following exploration. Further storage or transfer of samples can be made at an agreed expense upon Client's written request. HAZARDOUS SUBSTANCES Unless specifically included in the "Scope of Services," this Agreement does not include any services (including. detection or identification) relative to any substances which might be considered hazardous by an applicable regulations. OWNERSHIP OF DOCUMENTS All reports, boring logs, field data and notes, laboratory test data, calculations, estimates and other documents prepared by GDC, as instruments of service, shall remain the property of GDC. Client agrees that all reports and other work furnished to the Client or its agents, which are not paid for, will be returned upon demand and will not be used by the Client for any purpose whatever. NO THIRD PARTY RIGHTS This Agreement shall not create any rights or benefits to parties other than Client and GDC. TIME BAR TO LEGAL ACTION All legal actions by either party against the other for breach of this Agreement, or for failure to perform in accordance with the applicable standard of care, however denominated, that are essentially based on such breach or failure, shall be barred in two (2) years from the time claimant knew or should have known of its claim, but, in any event, not later than four (4) years from the substantial completion of GDC's services. DISPUTES In the event that a dispute arises relating to the performance of the services to be provided under this Agreement, and should that dispute result in litigation, it is agreed that the prevailing party shall be entitled to recover all reasonable costs incurred in connection with such dispute, including GDC's staff time at GDC's Schedule of Fees in effect at the time of such dispute, court costs, attorneys' fees and all other claim related expenses. initials CONSULTANTS Geotechnical Engineering �Je'okyv Hydro Geology Et Enptake Engineering 1'f tolalc Testing. InspectLon ., Forensic S ePvicee December 22, 2006 L-599 D2 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Tony Dahlerbruch, City Manger Subject: Continued Movement Poppy Trail Landslide Rolling Hills, California Mr. Dahlerbruch: On December 18, 2006, Group Delta Consultants, Inc. (GDC) reoccupied inclinometers PT -2R and PT -3 to determine if there was any continued movement on the Poppy Trail Landslide. From September 20, 2006 to December 18, 2006, PT -2R moved about 0.20 inches down slope with a total movement of little less than 0.80 inch from February 4, 2006 to December 18, 2006. PT -3 had 0.25 inch of movement total from the aforementioned February to December dates. On December 19, 2006, GDC was informed that during the removal of the plastic sheeting from the initial Poppy Trail Landslide covering, a large tension crack was discovered. After a field visit, the discarded plastic sheeting was covering the crack and most of it was filled with soil from equipment and people walking over the crack. The location of the crack was pointed out and is in the same area as the crack documented during a walkover on September 1, 2005. Since the area is loose, not compacted, it should not be unusual to see tension cracks appear as the loose soil continues to settle. Conclusion The Poppy Trail Landslide is moving much less than the initial movement after the landslide first failed. This is evident by the observation of the data collected while monitoring the inclinometers. The plastic sheeting has reduced the movement of the landslide mass by protecting the landslide surface from surface water infiltration. Presently, the old cover is being replaced with a new plastic cover since the old plastic sheeting was getting brittle from sun exposure. To make the surface more esthetic; a green low glare synthetic geo-fiber blanket is going to be secured on top of the plastic sheeting to reduce glare. The tension crack was the result of differential settlement and minor movement of the un-compacted soil and rock within the landslide mass. With the small amount of movement measured from observations taken from the inclinometers between 2291 W. 205th Street, Suite 105 ♦ Torrance, CA 90501-1459 + Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo♦ (949) 609-1020 ♦www.GrounDelta.com♦ San Diego♦ (858) 524-1500 , • • Continued Movement Poppy Trail Landslide Rolling Hills, California December 22, 2006 Page 2 February 4, 2006 and December 18, 2006, the landslide can be considered more stable. If properly covered, the landslide mass should continue to stabilize. Cracks may continue to appear on the slide mass but the inclinometer readings should be used to indicate the true movement. Monitoring ground -displacement of the inclinometers should continue on a bi-weekly basis during the replacement of the plastic sheeting and during the rainy season. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist Attached: Inclinometer Cumulative Displacement Curves and Cumulative Displacement vs. Time Curves. a) 0 0 10 20 40 50 POPPY TRAIL PT -2R, A -Axis -v- 2/4/2006 -0-6/22/2006 - 7/11/2006 -d- 7/20/2006 -6- 8/2/2006 8/11/2006 8/17/2006 - a- 8/30/2006 - 0- 9/9/2006 -0- 9/12/2006 --0- 9/20/2006 - 12/18/2006 60 1 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 20- a) m c 30 a. m 0 40 50 60 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 POPPY TRAIL PT -2R, B -Axis -v-- 2/4/2006 - 6/22/2006 - a-- 7/11/2006 - 6-- 7/20/2006 -o- 8/2/2006 -x- 8/112006 - 8/17/2006 -0- 8/30/2006 - 0-- 9/9/2006 -D- 9/12/2006 -0- 9/20/2006 -0- 12/18/2006 Poppy Trail Landslide Rolling Hils, CA Inclinometer PT -2R December 18, 2006 n. N 0 0 5 10 15 20 25 30- 35- 40- 45- 50 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, A -Axis - - 9/6/2005. . - 9/6/2005 -0- 6/22/2006 -a- 7/11/2006 - 7/20/2006 - 8/2/2006 8/11/2006 - v- 8/17/2006 -6- 8/30/2006 -Q- 9/9/2006 -6- 9/12/2006 - 0- 9/20/2006 -A-- 12/18/2006 5 10- 15- 20 - . . . . . . . . . c 25 N 0 30- 35 - 40 45- 50 -1 00 - POPPY PT -3, 6 -Axis -0.50 0.00 - 9/6/2005 -0-- 9/6/2005 -o- W22/2006 ▪ 7/11/2006 -o-- 7/20/2006 - K 8/2/2006 8/11/2006 ▪ 8/17/2006 - 0-- 8/30/2006 - 0-- 9/9/2006 - 0- 9/12/2006 -0- 9/20/2006 - 12/18/2006 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -3 December 18, 2006 Poppy Trail Landslide PT -2 R (A -axis) Inclinometer Cumulative Displacement vs. Time 0.90 0.80 - 0.70 — w a7 c • 0.60 - :.. 0.50 - p 0.40 - a) • 0.30 - E v 0.20 0.10 - 0.00 ♦ 2/2/2006 3/5/2006 4/5/2006 5/6/2006 6/6/2006 7/7/2006 8/7/2006 9/7/2006 10/8/2006 11/8/2006 12/9/2006 Time Poppy Trail Landslide PT -2R (B -axis) Inclinometer Cumulative Displacement vs. Time Cumulative Displacement (inches) 6/5/2006 7/6/2006 8/6/2006 9/6/2006 101712006 111712006 12/8/2006 Time GROUPI Geoteclnka1 Engineering Geology IlydroGeolc y Earthquake Engineering; b?at Testing & Inspection Forensic Services December 22, 2006 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Subject: Tony Dahlerbruch, City Manger Continued Movement Poppy Trail Landslide Rolling Hills, California Mr. Dahlerbruch: L-599 D2 On December 18, 2006, Group Delta Consultants, Inc. (GDC) reoccupied inclinometers PT -2R and PT -3 to determine if there was any continued movement on the Poppy Trail Landslide. From September 20, 2006 to December 18, 2006, PT -2R moved about 0.20 inches down slope with a total movement of little less than 0.80 inch from February 4, 2006 to December 18, 2006. PT -3 had 0.25 inch of movement total from the aforementioned February to December dates. On December 19, 2006, GDC was informed that during the removal of the plastic sheeting from the initial Poppy Trail Landslide covering, a large tension crack was discovered. After a field visit, the discarded plastic sheeting was covering the crack and most of it was filled with soil from equipment and people walking over the crack. The location of the crack was pointed out and is in the same area as the crack documented during a walkover on September 1, 2005. Since the area is loose, not compacted, it should not be unusual to see tension cracks appear as the loose soil continues to settle. Conclusion The Poppy Trail Landslide is moving much less than the initial movement after the landslide first failed. This is evident by the observation of the data collected while monitoring the inclinometers. The plastic sheeting has reduced the movement of the landslide mass by protecting the landslide surface from surface water infiltration. Presently, the old cover is being replaced with a new plastic cover since the old plastic sheeting was getting brittle from sun exposure. To make the surface more esthetic; a green low glare synthetic geo-fiber blanket is going to be secured on top of the plastic sheeting to reduce glare. The tension crack was the result of differential settlement and minor movement of the un-compacted soil and rock within the landslide mass. With the small amount of movement measured from observations taken from the inclinometers between 2291 W. 205th Street, Suite 105 • Torrance, CA 90501-1459 ♦ Te1(310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo+ (949 ) 509-1020 ♦www.GrounDelta.com♦ San Diego+ 1858) 524-1500 (1 GROUP; IDELTAI IJ Continued Movement. Poppy Trail Landslide Rolling Hills, California December 22, 2006 Page 2 February 4, 2006 and December 18, 2006, the landslide can be considered more stable. If properly covered, the landslide mass should continue to stabilize. Cracks may continue to appear on the slide mass but the inclinometer readings should be used to indicate the true movement. Monitoring ground -displacement of the inclinometers should continue on a bi-weekly basis during the replacement of the plastic sheeting and during the rainy season. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist Attached: Inclinometer Cumulative Displacement Curves and Cumulative Displacement vs. Time Curves. 10 20 - a) 4- c 30- 3 a) a 40 50 60 -0.50 0.00 -1.00 POPPY TRAIL PT -2R, A -Axis - 2/4/2006 -0- 6/22/2006 -0- 7/11/2006 - A- 7/20/2006 - 0 8/2/2006 _ 8/11/2006 -+- 8/17/2006 -0- 8/30/2006 -o- 9/9/2006 -fl- 9/12/2006 - A- 9/20/2006 - 12/18/2006 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 10 20- 4( c 30 a) 0 40 POPPY TRAIL PT -2R, B -Axis -9- 2/4/2006 - 0-- 6/22/2006 - 7/11/2006 -d-- 7/20/2006 - 8/2/2006 50 - 8/11/2006 -* 8/17/2006 -Q-- 8/30/2006 -0-- 9/9/2006 -0- 9/12/2006 -d- 9/20/2006 -0- 12/18/2006 60- -1.00 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hils, CA Inclinometer PT -2R December 18, 2006 • • 0 5 10- 15- 20- m • 25 - a) 0 30- 35- 40- 45 - POPPY PT -3, A -Axis - - 8/2/2006 8/11/2006 -v- 8/17/2006 - W30/2006 -d-- 9/9/2006 -6- 9/12/2006 - 0- 9/20/2006 12/18/2006 50 , -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, 13 -Axis 5 10 15 20 c 25 a, 0 30 35- 40 45 - -v-. 9/6/2005 - 0- 9/6/2005 -fl-- 6/22/2006 -a- 7/11/2006 - a- 7/20/2006 8/2/2006 -F- 8/11/2006 - 8/17/2006 - 0-- 8/30/2006 - 0-- 9/9/2006 - a- 9/12/2006 - 0- 9/20/2006 - 12/18/2006 50 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -3 December 18, 2006 Poppy Trail Landslide PT -2 R (A -axis) Inclinometer Cumulative Displacement vs. Time 0.90 0.80 - 0.70 - N a) c 0.60 - V 0.50 - 0.40 - a) ea 5 0.30 - E U 0.20 - 0.10 - 0.00 ♦ 2/2/2006 3/5/2006 4/5/2006 5/6/2006 6/6/2006 7/7/2006 8/7/2006 9/7/2006 10/8/2006 11/8/2006 12/9/2006 Time Poppy Trail Landslide PT -2R (B -axis) Inclinometer Cumulative Displacement vs. Time 0.30 0.25 N d .c 20.20 w C 6 a) > :F+ 5 0.10 E 3 c0 0.05 -4 0.00 • -� 2/1/2006 3/4/2006 4/4/2006 5/5/2006 6/5/2006 7/6/2006 8/6/2006 9/6/2006 10/7/2006 11/7/2006 12/8/2006 Time • • • • 1 • GROUT' December 22, 2006 L-599 D2 City of Rolling Hills DELTA No. 2 Portuguese Bend Road NSU T N Rolling Hills, CA 90274 Attention: Tony Dahlerbruch, City Manger Subject: Continued Movement Poppy Trail Landslide Rolling Hills, California Mr. Dahlerbruch: On December 18, 2006, Group Delta Consultants, Inc. (GDC) reoccupied inclinometers PT -2R and PT -3 to determine if there was any continued movement on the Poppy Trail Landslide. From September 20, 2006 to December 18, 2006, PT -2R moved about 0.20 inches down slope with a total movement of little less than 0.80 inch from February 4, 2006 to December 18, 2006. PT -3 had 0.25 inch of movement total from the aforementioned February to December dates. On December 19, 2006, GDC was informed that during the removal of the plastic sheeting from the initial Poppy Trail Landslide covering, a large tension crack was discovered. After a field visit, the discarded plastic sheeting was covering the crack and most of it was filled with soil from equipment and people walking over the crack. The location of the crack was pointed out and is in the same area as the crack documented during a walkover on September 1, 2005. Since the area is loose, not compacted, it should not be unusual to see tension cracks appear as the loose soil continues to settle. Conclusion The Poppy Trail Landslide is moving much less than the initial movement after the landslide first failed. This is evident by the observation of the data collected while monitoring the inclinometers. The plastic sheeting has reduced the movement of the landslide mass by protecting the landslide surface from surface water infiltration. Presently, the old cover is being replaced with a new plastic cover since the old plastic sheeting was getting brittle from sun exposure. To make the surface more esthetic; a green low glare synthetic geo-fiber blanket is going to be secured on top of the plastic sheeting to reduce glare. The tension crack was the result of differential settlement and minor movement of the un-compacted soil and rock within the landslide mass. With the small amount of movement measured from observations taken from the inclinometers between �!i<•: \'!,;0♦ n .- I ! ' owww.GroupDelta.com+ • Continued Movement Poppy Trail Landslide Rolling Hills, California December 22, 2006 Page 2 February 4, 2006 and December 18, 2006, the landslide can be considered more stable. If properly covered, the landslide mass should continue to stabilize. Cracks may continue to appear on the slide mass but the inclinometer readings should be used to indicate the true movement. Monitoring ground -displacement of the inclinometers should continue on a bi-weekly basis during the replacement of the plastic sheeting and during the rainy season. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist Attached: Inclinometer Cumulative Displacement Curves and Cumulative Displacement vs. Time Curves. GROUP r DELTA 0 10 20 a� a) j30 40 POPPY TRAIL PT -2R, A -Axis -9- 2/4/2006 -0- 6/22/2006 - 7/11/2006 - 6- 7/20/2006 - 0- 8/2/2006 50- .. .. • � • -�-- 8/11/2006 - 8/17/2006 -V- 8/30/2006 -4- 9/9/2006 - 9/12/2006 -¢• 9/20/2006 - 12/18/2006 60 , • -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 POPPY TRAIL PT -2R, B -Axis 10 20 30 a a) 0 40 50 60 1--- -1 00 -0.50 0.00 - v 2/4/2006 - 6/22/2006 -a• 7/11/2006 - 7/20/2006 8/2/2006 8/11/2006 -4- 8/17/2006 - 0. 8/30/2006 9/9/2006 -0- 9/12/2006 - 0- 9/20/2006 - 12/18/2006 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hils, CA Inclinometer PT -2R December 18, 2006 • • POPPY PT -3, A -Axis 5 10 15 20 ♦r a) 25 - 0_ a) a 30 35 40 45 50 -v- 9/6/2005. - 0- 9/6/2005 - 6/22/2006 -6- 7/11/2006 - 0-- 7/20/2006 - x- 8/2/2006 8/11/2006 --v- 8/17/2006 - 8/30/2006 -¢ 9/9/2006 - a- 9/12/2006 - 9/20/2006 - x- 12/18/2006 -1 00 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 0 5 10 15 20 a) C_ 25 a a) 0 POPPY PT -3, B -Axis 30 - 35 40 45 -v- 9/6/2005 -o-- 9/6/2005 - 0-- 6/22/2006 -6- 7/11/2006 - 7/20/2006 - 8/2/2006 8/11/2006 -9-- 8/17/2006 - 0-- 8/30/2006 - 0-- 9/9/2006 -6- 9/12/2006 - 9/20/2006 -x- 12/18/2006 50 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -3 December 18, 2006 4* Poppy Trail Landslide PT -2 R (A -axis) Inclinometer Cumulative Displacement vs. Time 0.90 0.80 - 0.70 - d c 0.60 - c 0.50 v Q. p 0.40 - a) 5 0.30 - E U 0.20 0.10 - 0.00 ♦ _ _ __-� 2/2/2006 3/5/2006 4/5/2006 5/6/2006 6/6/2006 7/7/2006 Time 8/7/2006 9/7/2006 10/8/2006 11/8/2006 12/9/2006 • • Poppy Trail Landslide PT -2R (B -axis) Inclinometer Cumulative Displacement vs. Time 0.30 0.25 N d t C 0.20 ::. w d E d a 0.15 C d E U 0.05 0.00 --r--- 2/1/2006 3/4/2006 4/4/2006 5/5/2006 6/5/2006 7/6/2006 8/6/2006 9/6/2006 10/7/2006 11/7/2006 12/8/2006 Time ; • • DELTA CONSULTANTS vc"OtECimi ai �72}'TM.n2; r ru. Earthquake End -fns riri- Tateri is T stir Inspection orr€' .gic$vr�S. £S December 22, 2006 L-599 D2 City of Rolling Hills No. 2 Portuguese Bend Road Rolling Hills, CA 90274 Attention: Subject: Tony Dahlerbruch, City Manger Continued Movement Poppy Trail Landslide Rolling Hills, California Mr. Dahlerbruch: On December 18, 2006, Group Delta Consultants, Inc. (GDC) reoccupied inclinometers PT -2R and PT -3 to determine if there was any continued movement on the Poppy Trail Landslide. From September 20, 2006 to December 18, 2006, PT -2R moved about 0.20 inches down slope with a total movement of little less than 0.80 inch from February 4, 2006 to December 18, 2006. PT -3 had 0.25 inch of movement total from the aforementioned February to December dates. On December 19, 2006, GDC was informed that during the removal of the plastic sheeting from the initial Poppy Trail Landslide covering, a large tension crack was discovered. After a field visit, the discarded plastic sheeting was covering the crack and most of it was filled with soil from equipment and people walking over the crack. The location of the crack was pointed out and is in the same area as the crack documented during a walkover on September 1, 2005. Since the area is loose, not compacted, it should not be unusual to see tension cracks appear as the loose soil continues to settle. Conclusion The Poppy Trail Landslide is moving much less than the initial movement after the landslide first failed. This is evident by the observation of the data collected while monitoring the inclinometers. The plastic sheeting has reduced the movement of the landslide mass by protecting the landslide surface from surface water infiltration. Presently, the old cover is being replaced with a new plastic cover since the old plastic sheeting was getting brittle from sun exposure. -To make the surface more esthetic; a green low glare synthetic geo-fiber blanket is going to be secured on top of the plastic sheeting to reduce glare. The tension crack was the result of differential settlement and minor movement of the un-compacted soil and rock within the landslide mass. With the small amount of movement measured from observations taken from the inclinometers between `'V 2291 W. 205` Street. Suite 105 • Toixance, CA 90501-1459 • Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo* (949) 609-1020 *www.GrounDelta.com♦ San Diego* (858) 524-1500 • • porp T c—{' Continued Movement Poppy Trail Landslide Rolling Hills, California December 22, 2006 Page 2 - February 4, 2006 and December 18, 2006, the landslide can be considered more stable. If properly covered, the landslide mass should continue to stabilize. Cracks may continue to appear on the slide mass but the inclinometer readings should be used to indicate the true movement. Monitoring ground -displacement of the inclinometers should continue on a bi-weekly basis during the replacement of the plastic sheeting and during the rainy season. Any questions, please give us a call. Sincerely, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, CEG Associate Geologist Attached: Inclinometer Cumulative Displacement Curves and Cumulative Displacement vs. Time Curves. !DELTA' =mum POPPY TRAIL PT -2R, A -Axis 10 20- m a) 302 a N 40- 50 60 -100 -0.50 0.00 Cumulative Displacement (in) from 2/4/2006 -0- 2/4/2006 - 6/22/2006 - 0-- 7/11/2006 - 7/20/2006 - 0-- 8/2/2006 8/1112006 - 8/17/2006 -47- 8/30/2006 -0- 9/9/2006 - 9/12/2006 - 9/20/2006 - 12/18/2006 0.50 1.00 a) 0 10 20 - 40 POPPY TRAIL PT -2R, B -Axis -v- 2/4/2006 - 0- 6/22/2006 - 0- 7/11/2006 - 7/20/2006 -0- 8/2/2006 50 8/11/2006 - 8/17/2006 8/30/2006 - 0--- 9/9/2006 - 0- 9/12/2006 -0-- 9/20/2006 60 -0- 12/18/2006 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hits, CA Inclinometer PT -2R December 18, 2006 POPPY PT -3, A -Axis 5 - o-. 9/6/2005. - 3- 9/6/2005 -r3- 6/22/2006 -0- 7/11/2006 - 7/20/2006 - K- 8/2/2006 8/11/2006 -v- 8/17/2006 - 0- 8/30/2006. -0- 9/9/2006 -a- 9/12/2006 -0- 9/20/2006 - 12/18/.2006 50 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 45 - POPPY PT -3, B -Axis - 8/2/2006 - 8/11/2006 -� 8/17/2006 � - 8/30/2006 -0-- 9/9/2006 -6- 9/12/2006 -o- 9/20/2006 , ! - 12/18/2006 50 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -3 December 18, 2006 Poppy Trail Landslide PT -2 R (A -axis) Inclinometer Cumulative Displacement vs. Time 0.90 0.80 0.70 - N c 0.60 4c m 0.50 its p 0.40 - m so 0.30 - E 0.20 - 0.10 0.00 s 2/2/2006 3/5/2006 4/5/2006 5/6/2006 6/6/2006 7/7/2006 8/7/2006 9/7/2006 10/8/2006 11/8/2006 12/9/2006 Time Poppy Trail Landslide PT -2R (B -axis) Inclinometer Cumulative Displacement vs. Time 0.30 0.25 c 0.20 a m 10 B 0.10 E V 0.05 0.00 2/1/2006 3/4/2006 4/4/2006 5/5/2006 6/5/2006 7/6/2006 8/6/2006 9/6/2006 10/7/2006 11/7/2006 12/8/2006 Time DELTA CONSULTANTS End tngering Ea?fiz.,ua F tion Rolling Hills Community Association 1 Portuguese Bend Road Rolling Hills, California 90274 Attn: Subject: Mr. Ferris: Ray Ferris Rock Pop Out Poppy Trail Temporary Access Road Rolling Hills, California Project No. L-599 W July 27, 2006 On July 26, 2006, GROUP DELTA CONSULTANTS, INC. (GDC), the GDC soil technician observing the placement of backfill at the Poppy Trail site called the GDC geologist to explain that there was a small rock pop out on top of the fill that is presently being placed. After observing the pop out it was determined that a rock layer was fractured into large angular blocks with near horizontal and near vertical fractures. This rock layer consisted of one -foot thick dolostone/siliceous bed daylights out of a cut vertical at about 10 degrees. The pop out was approximately 15 feet wide by 5 to 6 feet high. Since this hard bed is blocky, large chunks, they can be dislodged and drop out of slope. After observing the conditions in the field, it was determined to lay the broken rock pop out back 1:1 horizontal to vertical and backfill the removal. It was also observed that in the area on the north side of the present fill placement, near the curve about midway, good rock was exposed. This area was to be filled with a 1:5 fill slope. Since the rock was hard and not unstable, it was determined not to continue the fill to the north beyond the curve. All the changes in the placement of the fill will need to be observed by the project geologist. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG-1965 L -599W Memo 7-27-06.doc 2291 W. 205'' Street, Suite 105 ♦ Torrance, CA 90501-1459 ♦ Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo♦ (949) 609-1020 ♦www.GrounDelta.com♦ San Diego+ (858) 524-1500 L-599 W Group Delta Consultants. Inc. Cut Slope GROUP DELTA Fill Slope 2 Poppy Trail Landslide City of Rolling Hills Rocks Dislodging from Slope i v. 4 a GROUP DELTA massimm L-599 W Group Delta Consultants. Inc. 3 Poppy Trail Landslide City of Rolling Hills Retaining Wall Poppy Trail 'DELTA CONSULTANTS F Insp cti,..n Forensic� Rolling Hills Community Association 1 Portuguese Bend Road Rolling Hills, California 90274 Attn: Subject: Mr. Ferris: Ray Ferris Wall Building Code and Slope Stability Poppy Trail Temporary Access Road Rolling Hills, California Project No. L-599 W December 27, 2005 On December 22, 2005, GROUP DELTA CONSULTANTS, INC. (GDC) with an ICBO masonry inspector observed about 75% of the north portion of the block wall, along the Poppy Trail Temporary Access Road, for code compliance. After observing the existing placement of the wall, there were some code deficiencies. The deficiencies were not corrected before grouting but the grout mix strength was increased and a reinforcement fiber was added as a compromise. During placement of the grout, the block cells were vibrated during placement and again after placement of the grout as part of the compromise. After observing the wall, it was decided that the wall should be waterproofed and a burrito drain should be installed along the bottom of the wall on the slope side. Both the waterproofing and burrito drain should increase the longevity of the wall. The area along the cut slope from Stake 259 through 275 needs to be stabilized since the slope was not in bedrock but slopewash and alluvium. It was suggested to construct a stability fill with a 5 foot key with a 1:1 (horizontal to vertical) back cut to prevent erosion and sloughing. After the Temporary Road Rough Grading was completed, it was decided that the stability fill would be constructed after the wall was erected. After the completion of the wall through the area of concern, it was suggested to place jute netting and plant the slope. The use of jute and seeding was accepted but it is noted that there may be a maintenance problem in that area. If the problems become too much of a costly maintenance or a danger to the public, the slope will need to be stabilized by other methods. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG N:\Projects\500-599\L-599 Rolling Hill Poppy Trail Landslide\L-599W Alternate Road Wall \L -599W Memo 12-27-05.doc 2291 W. 205th Street, Suite 105 ♦ Torrance, CA 90501-1459 ♦ Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo+ (949) 609-1020 ♦www.GrounDelta.com♦ San Diego♦ (858) 524-1500 %MII 10 VU VI. W1J 1 VI11 rvnnan nu�op o o ull0 IU'd p.. REGISTERED SPECIAVDEPUTY INSPECTION GROU91P DEh STA�CONSULTANTS,e 105, Torrance, � INC. DAILY REPORT - Tel: (310) 320-5100 - Fa:c (310) 320-2118 _ - Date Building Departmerr<t Permit No. OE !� - Project Name POppi rl.N.rtto L -t L Project No. Project Address /� 1 Owner's Name .e01,1 ".� VJ S MM Phone No. Owner's Address 4-t 'P0 RSV CoUESE- "Bet —t .Rb • -Rai t A1 b a-1. General Contractor �j t 1NM tCt\ Co tls^t 2 tie-rib/4 Phone General Contractor's Address Fax Site Contact Beeper/Cell Structural Engineer/Architectural Engineer Phone Structural Engineer/ Architectural Engineer Firm Address Fax Contact Name in Seal Type of Inspection: O Reinforced Concrete 03 Hi-Tensicn Boltse 0 Prestressnhors 0 Framing Structural.Masonry Q We ding 3 Other 0 Reber To the Building Official: Building Inspector: I hereby, certify that work at the above address which required Special/Deputy Inspection was inspected by me and complies with applicable provisions of the Building Codes and approved drawings. t'�'Cre e. �- 1SY1 i �+'� �, Wee -.3. C'..btil a're>> 9 3F'L-4 . 'XT Vu,S t2 e"& ' —rvu —1 Nob ,.1 5 ? ' ctel a fa -e o a -t - j d EL, orrr t.k.Cca eb(vt- t A rJ �UiaiS_ t ki. Q E U ?SE- ~Ci rL &ceakT t` W o V kaL ro -3000 ?ST- j cra. fl. - e-12, fl-'t1)Pirrius U,3 U5Eq. RA 412. Si. J- Nh i2 -c- rE1 t2.2 2 • c t E PS -t --t-- t� o ti Co & P L f‘k:l to i� i\Ak� Deputy Inspector (Print) Deputy Inspector (Sign? Hours: Sat. License: Type: 64`r" , Date Sun. Mon. Tues. Wed, Thurs. Fri. Client Representative! Verified by (Print & Sign) WHITE - Of= Copy YELLOW- Feld File Ebpy PUNK- Clem Flop/Site Copy CONSULTANTS 11::ed ,vG ;ioov Ea>lizq uke SYc !??2)'i7t4 l(vrt,q3 T2..TMN._ Forensic.: 61>>pvicas Rolling Hills Community Association 1 Portuguese Bend Road Rolling Hills, California 90274 Subject: Mr. Ferris: Ray Ferris South Footing of Retaining Wall, Poppy Trail Temporary Access Road Rolling Hills, California Project No. L-599 W December 19, 2005 On December 15 and 16, 2005, GROUP DELTA CONSULTANTS, INC. (GDC) observed the remaining southern portion of the retaining wall footing excavation along the Poppy Trail Temporary Access Road. The area along rough grading elevation 777 south to 778 where the bottom materials consisted of weathered rock and layers of soft to medium stiff sandy clay with abundant gravels and cobbles was removed to acceptable earth materials. That portion of the excavation was filled with a low strength concrete to the original footing bottom elevation on December 15, 2005. The remaining footing, to the south, was excavated to acceptable earth materials on December 15 and 16, 2005 with no over excavating needed. The remaining open footing observed on December 15 and 16, 2005 is acceptable for concrete and steel. Before placing concrete, all soil and rock material that sloughed into the excavation or any soft areas from foot traffic that occurred along the excavation bottom when placing steel should be removed. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG L -599W Memo 12-19-05.doc 2291 W. 205th Street, Suite 105 • Torrance, CA 90501-1459 ♦ Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo* (949) 609-1020 ♦www.GrouuDelta.com* San Diego♦ (858) 524-1500 'DELTA CONSULTANTS rzginer`nh Engin. a?•ing ;1'd _ruts i ."n' lnsp?ctionc FC. c ruic Rolling Hills Community Association 1 Portuguese Bend Road Rolling Hills, California 90274 Attn: Subject: Mr. Ferris: Ray Ferris North Footing of Retaining Wall, Poppy Trail Temporary Access Road Rolling Hills, California Project No. L-599 W December 13, 2005 On December 13, 2005, GROUP DELTA CONSULTANTS, INC. (GDC) observed the retaining wall footing excavation along the Poppy Trail Temporary Access Road in the area along rough grading elevation 777 south to 778. The bottom materials consisted of a loose light brown silty to clayey sand and weathered rock with layers of soft to medium stiff gray to gray green sandy clay with abundant gravels and cobbles. The soil probed for 18 inches in the key area of the footing excavation. While onsite, backhoe pits were excavated in the soft to loose areas to determine the depth to competent rock. To the south of the excavated footing trench, rock was found in the test pits. The final solution determined in the field was to over excavate the footing in the soft and loose material areas with an excavator. After the over excavation is complete, a low strength concrete will need to be placed in the excavation to replace the excavated soil. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG N:\Projects\500-599\L-599 Rolling Hill Poppy Trail Landslide\L-599 D Alternative Alignment\L-599W Memo 12-9-05.doc 2291 W. 2051' Street, Suite 105 ♦ Torrance, CA 90501-1459 ♦ Tel (310) 320-5100 s Fax (310) 320-2118 Aliso Viejo* (949) 609-1020 ♦www.GroupDelta.coms San Diego* (858) 524-1500 DELTA CONSULTANTS ydro( .iogy R'.rthqu,17 e u .; : Lit. ..7tio City of Rolling Hills 2 Portuguese Bend Road Rolling Hills, California 90274 Attn: Craig Nealis, City Manager Project No. L-599 D1 (Revised 12/13/05) December 9, 2005 Subject: Septic System at Poppy Trail #1 Rolling Hills, California Mr. Nealis: The city needs to address the locations of the septic tanks and pits above the landslide at Poppy Trail #1 in the City of Rolling Hills. When the winterization of the landslide resumes, the back cut may encroach into the septic systems at Poppy Trail #1. Prior to cutting back the slope, the septic tank(s) effluent should be pump and exported offsite to be disposed of at an appropriate dump. If septic tanks or pits are encountered during the cutting back of the slope, the tanks should be removed and pits backfilled with 2 -sack slurry to 2 -feet from the surface. The upper 2 -feet should be filled with compacted fill. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG N:\Projects\500-599\L-599 Rolling Hill Poppy Trail Landslide\L-599 D Alternative Alignment\L-599 Dl Exporting of Soil.doc 2291 W. 205th Street, Suite 105 ♦ Torrance, GA 90501-1459 ♦ Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo+ (949) 609-1020 ♦www.GroupDelta.com♦ San Diego• (858) 524-1500 Ea7tiaquace &insN•cticn Foreruic Rolling Hills Community Association 1 Portuguese Bend Road Rolling Hills, California 90274 Attn: Subject: Mr. Ferris: Ray Ferris Project No. L-599 D1 (Revised 12/13/05) December 9, 2005 North Footing of Retaining Wall, Poppy Trail Temporary Access Road Rolling Hills, California On December 8, 2005, GROUP DELTA CONSULTANTS, INC. (GDC) observed that Simich Construction placed concrete in the deepened footing at the north end of the retaining wall along the Poppy Trail Temporary Access Road cut slope. This area was deepened due to the presence of soft unstable alluvial soils. Simich Construction was requested to remove the soft alluvium to bedrock and have the bottom approved by the project geotechnical engineer or engineering geologist before the placement of steel and concrete. Concrete was placed into the deepened excavation prior to approval of the bottom. To observe if the concrete was placed on competent bedrock, a 1 -foot wide backhoe trench was dug along side the placed concrete to evaluate if the bottom was on competent bedrock. The exposed bottom in the trench was observed to be on bedrock. The 1 -foot wide trench was deepened to about 2 -feet into bedrock. Structural concrete is to be placed in the trench at the time the final footing is poured. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG N:\Projects\500-599\L-599 Rolling Hill Poppy Trail Landslide\L-599 D Alternative Alignment\L-599W Memo 12-9-05.doc 2291 W. 205`''' Street, Suite 105 ♦ Torrance, CA 90501-1459 + Tel (310) 320-5100 • Fax (310) 320-2118 Aliso Viejo* (949) 609-1020 ♦www.GrouuDelta.com♦ San Diego♦ (858) 524-1500 Rolling Hills Community Association 1 Portuguese Bend Road Rolling Hills, California 90274 DELTA Attn: Ray Ferris/Craig Nealis CONSULTANTS ria' quIra 1 e tier E-li'."i Subject: Mr. Ferris: North Footing of Retaining Wall Poppy Trail Temporary Access Road and Soil Export at Poppy Trail #4 Rolling Hills, California Project No. L-599 D1 December 9, 2005 On December 8, 2005, GROUP DELTA CONSULTANTS, INC. (GDC) observed that Simich Construction placed concrete in the deepened footing at the north end of the retaining wall along the Poppy Trail Temporary Access Road cut slope. This area was deepened due to the presence of soft unstable alluvial soils. Simich Construction was requested to remove the soft alluvium to bedrock and have the bottom approved by the project geotechnical engineer or engineering geologist before the placement of steel and concrete. Concrete was placed into the deepened excavation prior t� approval of the bottom. To observe if the concrete was placed on competent bedrock, a 1 -foot wide backhoe trench was dug along side the placed concrete to evaluate if the bottom was on competent bedrock. The exposed bottom in the trench was observed to be on bedrock. The 1 -foot wide trench was deepened to about 2 -feet into bedrock. Structural concrete is to be placed in the trench at the time the final footing is poured. Another issue that needs to be addressed is the presence of the septic tanks and pits above the landslide on Poppy Trail #1. When the winterization of the landslide resumes, the back cut may encroach into the septic systems of Poppy Trail #1. Prior to cutting back the slope, the septic tanks effluent should be pump and exported offsite to be disposed of at an appropriate dump. If septic tanks or pits are encountered during the cutting back of the slope, the tanks should be removed and pits backfilled with 2 - sack slurry to 2 -feet from the surface. The upper 2 -feet should be filled with compacted fill. If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Steven H. Kolthoff, PG, CEG NAProjects\500-599\L-599 Rolling Hill Poppy Trail Landslide\L-599 D Alternative Alignment\L-599 D1 Exporting of Soil.doc 2291 W. 205`h Street, Suite 105 ♦ Tot -ranee., CA 90501-1459 ♦ Tel (310) 320-5100 ♦ Fax (310) 320-2118 Aliso Viejo* (949') 609-1020 ♦www.GrouuDelta.com♦ San Diego♦ (858) 524-1500 SIDNEY F. CROFT ATTORNEY AT LAW 3858 CARSON STREET, SUITE 127 TORRANCE, CALIFORNIA 90503-6705 (310) 378-5240 FAX (310) 540-4364 Email SFCroftLaw@aol.com January 11, 2006 Simich Construction 1400 Harbor Blvd. San Pedro, CA 90731 Re: Inspection Report dated 12-22-05 Poppy Trail Road retaining wall Dear Sirs: RECEIVE o„a,, Here is a copy of a letter I sent to Delta. It is my understanding the problem was solved. I just need a verification of the fact that the report is no longer significant, and the wall was properly constructed. Please send me whatever documentation you have. Thank you. Very truly yours, L6, SIDNEY F. CROFT SFC:kab CLIENTS\RHCA\Sheen\wall.const. • • SIDNEY F. CROFT ATTORNEY AT LAW 3858 CARSON STREET, SUITE 127 TORRANCE, CALIFORNIA 90503-6705 (310) 378-5240 FAX (310) 540-4364 Email SFCroftLaw@aol.com January 11, 2006 Group Delta Consultants, Inc. 2291 W. 205th St., Ste 105 Torrance, CA 90501-1437 Re: Inspection Report dated 12-22-05 Poppytrail Road Retaining Wall Dear Sirs: As you know, I represent the Rolling Hills Community Association ("RHCA"). Enclosed is a copy of a REGISTERED SPECIAL/DEPUTY INSPECTION DAILY REPORT that was received by my client. We are informed that after the REPORT was made the inspector met with representatives of the contractor (Simich Construction), and additional work was performed so that the completed wall complies with the CBC and UBC. The purpose of this letter is to request that you confirm that the non compliant conditions described in the REPORT have been corrected and that the wall as constructed complies with all applicable building codes. Please send me a copy of any subsequent report. I am sending a copy of this letter to Simich Construction with the request that they also verify that the wall complies with the building codes. Please contact me if you have any questions. • • SIDNEY F. CROFT January 11, 2006 Page 2 Thank you for your prompt attention to this matter. Very truly yours, W � NEY . CROF SFC: kab CLIENTS\RHCA\Sheen\wall.const. REGISTERED SPECIAL/D UTY INSPECTION GROUP D$A CONSULTANTS, INC. 2291 W. 205th St., Suite 105, Torrance, CA 90501-1437 DAILY REPORT Tel: (310) 320-5100 Fax: (310) 320-2118 Building Department Date t 2.21.05 Permit No a ci s4f e Project Name ?�Q`t't'�<< 42o - `eur �%� b -watt. Project No. Project Address /+ Owner's Name 'aCL�.t wtt. taS Co -r -4-µu .aY•{, PsSOC . Phone No. Owner's Address t Vbery �t1 e ' e C?'b - t�o".i +Lt� trAIS P Ca '4o2 L'1- General Contractor 51M.t.O-4 COAVre-Otrti. 4 Phone General Contractor's Address Fax Site Contact Beeper/Cell Structural Engineer/Architectural Engineer Phone 31b - is' - &Mb Structural Engineer/ $okCO'4 e t t V.SEEVi.,;� Architectural Engineer Firm Address Fax Name in Seal Contact Type of Inspection: O Reinforced Concrete 0 Gunite/Shotcrete 0 Prestress 0 Framing O NDT O Rebar O Hi -Tension Bolts 0 Anchors ,IliStructural Masonry O Welding Cl Other To the Building Official: Building Inspector: I hereby, certify that work at the above address which required Special/Deputy Inspection was inspected by me and campiies with applicable provisions of the Building Codes and approved drawings. A ves Aar CA M.F oi?i4 t?i1kCGM cto-� l��t�-�bzC�M> '�' t'a.rL� (o��E¢a►r`. ? loRou'r On et:34.t K!e (4.110=- PrtPPranc. FPer. -r tuprt'-- is to Ao t t Co tLACeJ.es? r0 LacR4401.- �iAL 6 Co A*LO 1�1 eOd e 4 -r'&E .. -C\0.15. oV eb Z t o4.3' u tic , r%cn»Sso.eaLr sh&t.c. 6E seGu ttlis0 A(.*.-'- ST Nts0 e - ME tar 1�R:ta2 -To G¢o rri v s An" Tk -etw - tsar Ste_ev li•c1. Zoe Ism at --ems-s ,trtto4..c.1 -CAC-vat, Pttt8t--Toroeovevy,co, p.c-t.5PAC-e5 Shah.. tterr N4b(ZT&. ?e tct4S G&capree.--tL ui. Zteg.-5 - cec.rucbc. To�e1CJt•-� Foos--ALE tte1 e,. r 01- tREL4EoetE MALT 5kI c;41 -Y2.1 4 2 Ib'+. L-1, - e t5e-ue C (&A,a, atcs s.ou.- gE Pe..m1;.0e12,e.-r Be rt;orA Cev 862 (f Euei Vein M. Je Mot- 'IWeA 32" 0.0 . IjP?EeJLe.A l3tise ks i4ts : DO t1rr ✓ tt to 1)4142-r- 4 Deratl : 4 400-a-. Are- -rb'p ac iZ« CI.uJ 4.v -c>z ate..-t:ost. -Eo s"a MA)Deputy Inspector (Print) t C60t Mt len+ License: T Ot,S /O IS'hType: A Deputy Inspector (Sign) I i/t- Hours: sat. Date 6Z•M.-vs Sun. Mon. Tues. Wed. 8 Thurs. Fri. Client Representative/ Verified by (Print & Sign) WHrTE — Office Copy YELLOW— Field File Copy PINK— Client Rep/Site Copy Jan 1 un UL:1 p iom Miller AIIC:i•p 41. p2 JREGISTERED SPECIAVDEPUTY INSPECTION G�gOUPW.�DELTA CO5th St., SuiteoN5SULTAN , Torrance, CA9S,INC. 0 -1437 DAILY REPORT Tel: (310) 320-5100 Fwc (310)320-2118 Building Department Date 12.21..05 Permit No. a 0.4.e Project Name P� 1-rtZei 40 . �+eC'�t.>tiul -WA.tA, Project No. Project Address {{ -- /s� Owner's Name 'AtiLt..att. 1s (�El .s.ttVwLLt't 06550e. . Pho_nte No. Owner's Address 4r t Vb'�i a G J Eye ►�� - V� Wks t �oZ1.4. General Contractor .1t►t.t 4 Ott► .5Tr-0=10= 4 Phone General Contractor's Address Fax Site Contact Beeper/Cell Structural Engineer/Architectural Engineer Phone ate -15-4.4.4.- &Ste Structural Engineer/ Sete C •i t t l 8 .�,{.. Architectural Engineer Firm Address Fax Name in Seal Contact Type of Inspection: 0 Reinforced Concrete 0 Gunite/Shotcrete 0 Prestress 0 Framing 0 NDT 0 Rebar Cl Hi -Tension Bolts Cl Anchors Structural Masonry 0 Welding Cl Other To the Building Officiar Building Inspector • l hereby. certify that work at the above address which required Special/Deputy Inspection was inspected by me and =spites with applicable provisions of the Building Codes and approved drawings. f3v6S ,j ..Cori-cQ 14 eBS 'Tam ?tAf k o C-1 -�ec�Me'AX' A.r-1A e8*Le .d L. Pea- &Ret. r - („o ac c•t eat . C'"t J7316uhilmted. PkwR.ox. rimer. -TILE toms. -to W 14.0 4. A.t-0 • r,1G tJi� tfxx t Co4G. O...tia Tic F �'Two.a.s 'Are .� � vst�/.s� 1►0.FAIA arc t s CeukTk Asir -G A+S t� lou3SA :� •� * zto�. T'IL'i r' u ic! ��• o r. a Tam+ 5he.l.l. Cif SLcGUt280 lJtSr . Muter r'Tzusta -, 4ae.7T-Z ry b _tt- 't-esL 4 &Lac- ste.. ns.u.. roe & ,emu+. 8-> s 41-'24o•{ &-1 **elate dad., ?MAL --re Poe.ouc..a.c.. M -L. 4.2ii`05 4ka.Lt, gArr Co1.t' i«t. Mb¢L , elEeWtadS i&ep rEe-- ►j►t:'L f *1.t04.- .• 5_t, ."40= Tr ate.4.•sc +F,;riy -rL Piker �I e5 &ALN t i•4.Foatt•metwi -566.16.L. 4-Y2.41 2 lo++• 0.136-13ed, C trams eats OIrL6u-- 45,0 Peed'riaeStsdeer errs GPO WSt3 Q euevai Akin tut, a ft% ..lac' Match •J4 32" (5.e - SPEe:.io PIA tali to 1.114 t. k.Qtat oP— -t- t•sL 5DerAil r 4 aoet�. • p.r:- -rwp o•C t7 - tt,�. 3 r�•s �a.�s L-c.ou. -co S C Mlu Z License pf ?02 ,15. J 6l/7Type• 4.• Deputy Inspector (Print) i� k l 'r Date tL-Z2.OS— �P�Y Inspector (Sign) � .i/l► Hours cat. _,Sun. Mon. Tues. Wed. a Thurs. Fri. OS: Client Representative/ Verified by (Print & Sign} WHITE— Woo Copy YELLOW — Feld Fie Copy wrsc—cleat Rep/Site Copy • Jan 1;i Ub U1:1yp I om Iviiuer Aut.;It p . 1U-1,IUJ J '— GROUP DELTA CONSULTANTS, INC. REGISTERED SPECIAL/DEPUTY INSPECTION 2291 W 205th St.• Suite 105, Terrance, CA 190501-1437 pAI LY REPORT Tel: (310) 320-5100 Fax:. (310) 320-2118 Building Departmeni Date ' L -Z Permit No. `p"�L°i�L ... t •T � ....ET' L:' -k rojectNo. Project Address j Owner's Name 1,Cita +lc: t4r th . Owner's Address *' l P:3 3 = �' General Contractor f,'awl. ^S`�iLL . Phone General Contractor's Address Fax Site Contact Beeper/Cell Structural Engineer/Aidlitectural Engineer Phone Structural Engineer/ Architectural Engineer =om Address Fax Name In Seal Contact Project Name Phone No. i; o l.� i►� 4L1L. Type of Inspection: 0 Reinforced Concrete 0 Gwiite/Shotcrete 0 Prestress 0 Framing 0 NDT 0 Reber 0 HI -Tension Bolts 0 Anchors XStrucbaal Masonry 0 Welding 0 Other To the Building Official' Building inspector: l hereby, certify that work at the above address which required Special/Deputy Inspection was inspected by me and complies with applicable provisions o` the Building Codes and approved drawings. PAC---(Z-L•t= • 1 G ?G.-VC:L t'i Ci ft"" 4{'• i� 1�`•? L C_'�� i� :t�C �' i �,{ r. �: rt 3 (_ L �i'�.t%c + i l:` ^t om t' t ^ ['t l -Re v c c t t�::s _ 41)1e-4-- is t�Lic-t e.. i/Gi2•Ct: r i C.Z- (ve&i.- r.' i 't -L. i� : rL-(. a\t. l -x t i•L: ��.-✓ �i. i i yul.1 CtV ti.ri 7lLau.—C i.i *PO LL it.iJ l 'w J 4�. �; C4-1-- EtiE • 3 r„. c i -..2 C: t: i4 ► E�.i L • .5 :4 � t �C •� . t l .1 "i��,� s i � .! 1i ♦ ( ice. 7 ;e•.; IN 9 i='f c i? Lt t_: • t.C.i ►- T i2_ 6,%— k, -L70% r..t vc� i t� i�•:li` .� I • Deputy Inspector (Print) Deputy Inspector (Sign): Hours: Client Representative/ Verified by (Print & Sign) • tL Lk. iki, License: g t =i : Date Sun. Mon. Tues. Wed. Thurs. Fri. • WMTE-OffuoCoDY Y8iOW- FidiReCOPY AMC - Capra Rep/Si•CcPy • • REGISTERED SPECIAL/DEPUTY INSPECTION GROUfP DELTA CO�NSULTANT205th St., Suite 1, Torrance, CA S4IN�C. 2291 7 DAILY REPORT Tel: (310) 320-5100 Fax: (310) 320-2118 Building Department NDPtE Permit No. Project Name Po mkt T12 ) L al) . Il2%.:1A 431 4 W Project No. Date /— a 7 r b C Project Address Owner's Name IaoLL, "it., 5 14,L.A. 5 Owner's Address Gereral Contractor 0 1 Co mrr, c.cn! ' MSbCPhone No. Phone Gereral Contractor's Address Fax Ste Contact Beeper/Cell Structural Engineer/Architectural Engineer_ eki6iNrc-aS Phone Architectural Engineer Firm Address Fax • Nacre in Seal Contact Type of Inspection: Q Re,niorced Concrete 0 GuniteiShotcrete 0 Prestress 0 Framing 0 NDT 0 Rebar 0 HI -Tension Bolts 0 Anchors AStructurai Masonry 0 Welding 0 Other To the Building Official: Building Inspector, I hereby, certify that work at the above address which required Special/Deputy Inspection was inspected by me and applicable provisions of the Building Codes and approved drawings. A t33en. ✓e- A.??gji, Kc 2a yA..ens ar= .3mO P'5 i ti ca. ie -rte complies with IL. 6Raccr ff, n- A Cri4, "I i 10 t., UTALL F/2o ni L-,Nt 7 S' — 7'10 6 t2.0...c.r V t.�cz o .A -T rr 56..s rra 4 N P PILO r'c'72.1.1 ,4C1. ,) Co iv Sot. ;0A:re- r, tiJ:rjq aye- GitAnI1G1-L Vir3R4ra2. l MtlL&* .! - 6 Q.o u.T 13 a rc 'Trr-s r 'ion a Le.; . rj J• Deputy Inspector (Print) \CRS. License:9O239tL (J�,LL Type: 15 ptJ► Deputy Inspector ( ign) V'/{ ✓ Date Hcrs: s Sun. Mon. Tues. Wed. Thurs. Fri. Client Representative/ Verified by (Print & Sign) 1.1010/ CZ WHITE - OHice Copy YELLOW - FIdd file Copy PINK- Gie't Rep.5te Copy ti•d COLC 6£9-0 LS s dsui'3!OIIV -mum wol dOZZO 90 £L Uef CONSULTANTS City of Rolling Hills 2 Portuguese Bend Road Rolling Hills, California 90274 Attn: Subject: Mr. Nealis: Craig Nealis, City Manager Exporting Soil From Poppy Trail #1 To Poppy Trail #4 March 6, 2005 Landslide Rolling Hills, California Project No. L-599 D1 December 5, 2005 GROUP DELTA CONSULTANTS, INC. (GDC) has been informed that the soil to be removed from the Poppy Trial #1 landslide headscarp is proposed to be exported to an open space area on Poppy Trail #4. After briefly reviewing the geology for Poppy Trail #4, the lot appears to be on a landslide and the geology appears to be adverse with respect to the existing slopes (Cleveland, 1976). With the stockpiling of soil on the slopes of Poppy Trail #4, the weight of the exported soil could reactivate any part of the landslide or the adverse geology could fail creating a new landslide. Please note, however, that we have performed only a cursory review of the geology of #4 Poppy Trail to identify potential hazards. We have not performed any field explorations or analyses. The City should be aware that there is a possibility of a failure caused by the stockpiling of the soil on Poppy Trail #4, and the City could therefore be responsible for the damage that occurs. The owner of #4 should retain a geotechnical engineer/engineering geologist to evaluate the area where the soil is proposed to be stockpiled to ensure that a geologically stable stockpile area is established. The evaluation may include drilling deep bucket auger borings, backhoe pits and a slope stability analysis. In addition, the City should consider obtaining a letter from the landowner releasing the City from liability for stockpiling of soil on any part of #4 Poppy Trail. Closure This letter summarizes the opinion of GDC. We have not as yet performed any detailed geologic mapping, subsurface exploration, laboratory analyses or engineering calculations on #4 Poppy Trail. As such, this letter is based only on our opinion. 2291 W. 2031 Street, Suite 105 • Torrance, CA 90501-1459 ♦ Tel (310) 320-510(1 ♦ Fax (310) 320-2118 Aliso Viejo* (949) 609-1020 ♦www.GroupDelta.com♦ San Diego* (858) 524-1500 L-599 DI Group Delta Consultants. Inc. 2 Poppy Trail Landslide City of Rolling Hills If you have any questions, or if we can be of further service, please do not hesitate to contact Group Delta Consultants, Inc. at 310-320-5100. Respectfully Submitted, GROUP DELTA CONSULTANTS, INC. Michael D. Reader, V.P., G.E. Steven H. Kolthoff, PG, CEG N:\Projects\500-599\L-599 Rolling Hill Poppy Trail Landslide \I. 599 D Alternative Alignment\l, 599 D1 Exporting of Soil.doc References: 1976, G.B. Cleveland, Geology of Part of the Palos Verdes Hills, Los Angeles County, California, Map Sheet 27, California Division of Mines and Geology. GROUP DELTA IKi7.S:t44d1:1P1 k • • 0 20 40 50 60 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 POPPY PT -2R, A -Axis 2/4/2006 2/13/2006 2/21/2006 3/6/2006 5/15/2006 POPPY PT -2R, B -Axis 60, , -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 2/4/2006 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -2 R May 15, 2006 • • C 25 a. a) a 50 -0 50 POPPY PT -3, A -Axis 9/6/2005 - 9/6/2005 - 0- 9/8/2005 -0- 9/16/2005 - 9/19/2005 -x- 9/20/2005 - 9/20/2005 -v- 10/3/2005 -0- 10/12/2005 - 10/18/2005 -A- 10/24/2005 -°- 11/11/2005 • 11/18/2005 -� 11/26/2005 -o- 11/28/2005 - 12/1/2005 - 0- 2/5/2006 -0- 2/13/2006 - 2/21/2006 • 3/6/2006 - 5/15/2006 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 POPPY PT -3, B -Axis 50 -0 50 0.00 0.50 -v- 9/6/2005 -o- 9/6/2005 -0- 9/8/2005 -a- 9/16/2005 - 9/19/2005 - - 9/20/2005 - 9/20/2005 -v- 10/3/2005 - 0-- 10/12/2005 - 0- 10/18/2005 -0- 10/24/2005 -a-- 11/11/2005 -x- 11/18/2005 -+- 11/26/2005 -V- 11/28/2005 -0-- 12/1/2005 -0- 2/5/2006 -A- 2/13/2006 - 0- 2/21/2006 3/6/2606 - 5/15/2006 II 1.00 1.50 Cumulative Displacement (in) from 9/6/2005 Poppy Trail Landslide Rolling Hills, CA Installation PT -3 May 15, 2006 a) POPPY PT -1, A -Axis 51 10' 15 20 ; 25 30 40 -1.00 -0 .50 0.00 9/2/2005 0 9/2/2005 -°- 9/6/2005 9/8/2005 -0- 9/16/2005 0.50 1 .00 Cumulative Displacement (in) from 9/2/2005 DEL TA BUOMFMNIZI 0 5 POPPY PT -1, B -Axis 10-j 15, 25 - 30 35 40 --T -1.00 -0.50 0 .00 9/2/2005 -0-- 9/2/2005 9/6/2005 9/8/2005 9/16/2005 0.50 1 00 «- Cumulative Displacement (in) from 9/2/2005 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -1 • 01- • - I 5 10 15 1 442 c 20 a a� O 25 1 30 35 j POPPY PT -2, A -Axis r'r II I 1/ - 9/6/2005 - .9/6/2005 - 9/8/2005 1 -C- 9/16/2005 404—.- - 5 10- 15 - 25 30 35 40 POPPY PT -2, B -Axis 9/6/2005 -a- 3/6/2005 { 9/8/2005 9/16/2005 -1.00 -0.50 0.00 0.50 1.00 -100 -0.50 0.00 0.50 1.00 Cumulative Displacement (in) from 9/6/2005 Cumulative Displacement (in) from 9/6/2005 GRour- DELTA Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -2 • POPPY PT -3, A -Axis 0 0 5j 10 15 20 25 a) 30 35 .1 40 45� 50 -1.00 -0.50 0.00 9/6/2005 0/6/2005 9/8/2005 �- 9/16/2005 0.50 1.00 5 10 15- 20 -' 25 a 30 35 40 45 50 -1.00 -0.50 0.00 0.50 1.00 POPPY PT -3, B -Axis - v- 9/6/2005 - 0- 9/6/2005 � - 9/8/2005 -5- 9/16/2005 Cumulative Displacement (in) from 9/6/2005 Cumulative Displacement (in) from 9/6/2005 GROUP r DELTA 151113311113313 Poppy Trail Landslide Rolling Hills, CA Inclinometer PT -3 aft LEGEND + 1 11 11 \\\1\\\\• 1 1 11 I \\\ \\\ \ o`wmn-3QTedekL\ � ( 11 1 1 \ \ . mee.fL t" - 4-411111 \ \; r+*oo,*07 -- Q. • Young AkM , os. • Slope Wash Oar • 1enOride Ms•Ow LAralide Tao -Mimeo Shale Cs -CABIN &trN OeobAc•lConed •- Bedding kl T," Sows Dlpabed wen *ph can wing Strke&Dip etSchisienity 4.01 Stites Dip dlexeids plane 'Neocene orlandslide rror rNo Crowded. ss spew OsIalSJuM A• I I Ow Section a Tesp0s &TmdN (P$RecNc Sale) Reference: Drawing prepared by, Bolton Engineering Corp, dated 5-24-05. 1 \ :• .� • \•;\. + \••�+° 1 ernes Locations CITY OF ROLLING HILLS AND ROWNG HILLS CO. OBTAIN PERMISSION FROM PROPERTY OWNER FOR AU. OFFSITE WORK ON in AND /4 POPPY TRAIL • • • --- \ `• /yam 1 1 lII 11111 `\� 111 +s 9111 —_/iii/. • eme 4/14/05 DRArM6T: T. Ybarra Re 00* 08/18✓05 ty REVISION AD lien 'A S. Kolthoff Owner: Mon Sheen Portion o1 Lot 90 Rolling Hills Troc di doggy Tree 1\ \. \\\ 11 \\ 1 %ter 1 1\ WOO \ 1 //%/ % 1 \ ''1.\\\ \ \ \ Y .//•�// / 1 j\\`I\ ; 1 - / /// + City Lot ----: _ •`••\\\" \\ \ \\\\\\-k\\\\ `\ .:\A\\ —Z -- 1 1 1 + GROUP DELTA CONSULTANTS, INC 2291 W. 205th Street Suite 105 Torrance, CA. 90501 Geologic Map PRoecrn MEN L-5996 SCAM 1"=80' Poppy Trail # 1 Landslide City of Rolling Hills - Rolling Hills, CA NORM MOEN 7