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644, Grading & repair of an existin, Staff Reports.11 • • gA Ci1y 0/ R0fiL JdP? INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 (310) 377-1521 FAX: (310) 377-7288 E-mail: cityofrh@aol.com DATE: JANUARY 21, 2003 TO: HONORABLE MEMBERS OF THE PLANNING COMMISSION FROM: YOLANTA SCHWARTZ, PLANNING DIRECTOR SUBJECT: ZONING CASE NO. 644,10 POPPY TRAIL, (LOT 3-PT). REQUEST FOR A ONE-YEAR TIME EXTENSION. BACKGROUND Attached is a request from Mr. and Mrs. Wang, requesting a one-year time extension for a previously approved request for a Site Plan Review for substantial grading (approximately 4,100 cubic yards of soil) for the purpose of repairing a failing slope at an existing residence in Zoning Case No. 644 that was approved by the Commission by Resolution No. 2002-01. A recent visit by the Building Official showed that in the past year the slope has not experienced additional fissures or failure. The applicants state that due to inability to find a contractor who would undertake this project, the project has not commenced. If the request for extension is approved, the approval will expire on February 15, 2004. RECOMMENDATION It is recommended that the Planning Commission consider the request and adopt Resolution No. 2003-02 granting the extension. �« a Printed on Recycled Paper. FROM : EGP INC • PHONE NO. : 310 541 391E • Jar,. 07 2003 11: 30RM P2 January 7,2003 Mrs_Yolanta Schwartz Not Portuguese Bend Raad Rotting hilts CA 90274 Subject: Extension For Zoning Case No .644 Dear Mrs. Schwartz: This letter is to request Extension on 10 Poppy Trail Case number 544, due to the finding a suitable contractor, we are unable to start work. 'This year after raining season, its ready to work. • • RESOLUTION NO. 2003-02 A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS APPROVING A MODIFICATION TO PLANNING COMMISSION RESOLUTION NO. 2002-01 AND APPROVING AN EXTENSION TO PREVIOUSLY APPROVED SITE PLAN REVIEW TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL IN ZONING CASE NO. 644, (WANG). THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS DOES HEREBY FIND, RESOLVE AND ORDER AS FOLLOWS: Section 1. A request has been filed by Mr. James Wang, with respect to real property located at 10 Poppy Trail, (Lot 3-PT) Rolling Hills, requesting an extension to previously approved Site Plan Review for grading of 4,100 cubic yards of soil for the purpose of repairing slope failure. The subject property is developed with a single-family residence and a pool. Concrete caissons were installed in 2001 along the rear of the residence to prevent slippage of the structure. Section 2. The Commission considered this item at a meeting on January 21, 2003, at which time information was presented indicating that due to inability by the applicant to find a qualified contractor, the project has not commenced, and therefore, the extension of time is necessary. Section 3. Based upon information and evidence submitted, the Planning Commission does hereby amend Paragraph A, Section 7 of Resolution No. 2002-01, dated January 15, 2002, to read as follows: A. The Site Plan Review approval shall expire within two years from the effective date of approval if construction pursuant to this approval has not commenced within that time period, as required by Section 17.46.080(A) of the Rolling Hills Municipal Code. Section 4. Except as herein amended, the provisions of Resolution No. 2002-01 shall continue to be in full force and effect. PASSED, APPROVED AND ADOPTED THIS 21st DAY OF JANUARY, 2003. EVIE HANKINS, CHAIRWOMAN ATTEST: MARILYN KERN, DEPUTY CITY CLERK • STATE OF CALIFORNIA COUNTY OF LOS ANGELES CITY OF ROLLING HILLS §§ I certify that the foregoing Resolution No. 2003-02 entitled: A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS APPROVING A MODIFICATION TO PLANNING COMMISSION RESOLUTION NO. 2002-01 AND APPROVING AN EXTENSION TO PREVIOUSLY APPROVED SITE PLAN REVIEW TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL IN ZONING CASE NO. 644, (WANG). was approved and adopted at a regular meeting of the Planning Commission on January 21, 2003 by the following roll call vote: AYES: NOES: ABSENT: ABSTAIN: and in compliance with the laws of California was posted at the following: Administrative Offices DEPUTY CITY CLERK •City 0/ Rolling JUL DATE: JANUARY 14, 2002 TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL ATTN: CRAIG R. NEALIS, CITY MANAGER FROM: YOLANTA SCHWARTZ, PRINCIPAL PLANNER SUBJECT: RESOLUTION NO. 2002-01: A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW APPROVAL TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL, IN ZONING CASE NO. 644, (WANG). • INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 (310) 377-1521 FAX: (310) 377-7288 E-mail: cityofrh@aol.com Agenda Item No.: 4C Mtng.Date: 1/14/02 BACKGROUND 1. The Planning Commission adopted Resolution No. 2002-01, which is attached, on January 12, 2002 at their adjourned meeting granting a request for a Site Plan Review for grading to repair a slope failure. A signed copy of the resolution of approval will be presented to the Council at tonight's meeting. 2. The Planning Commission considered this application at their regular meeting on December 18, 2001. 3. The applicant is requesting a Site Plan Review to permit substantial grading of a lot, which is subject to slope failure. Improvements on the lot include a single- family residence and a pool. The property owners reside at the property. Section 17.46.030 of the Zoning Code requires a development plan to be submitted for site plan review and approval before any grading which requires a grading permit may commence. It is estimated that approximately 4,100 cubic yards of soil will be graded. The purpose for the grading request is to stabilize the slope. The site, after repair, will be returned to its current slope configuration. 4. The existing house with an attached garage, totaling 6,906 square feet, was completed in 1986. In 1998 the property developed fill slope failure and fissures and cracks appeared to the rear of the existing structure. The applicant submitted an application to the County of Los Angeles Public Works Department, Soils and Geology Division for remediation repairs. In August of 2000, the County' Soils and Geology Division approved the approach necessary to correct the slope failure. The County's Building and Safety Division staff is currently reviewing the final grading and drainage plans. ZC No. 644 CC 1/14/02 Printed on Recycled Paper. • • 5. In 2000 the County issued a building permit for eleven caissons in order to underpin the house. The caissons have been installed. 6. The applicant is proposing to remove approximately 4,100 cubic yards of soil and replace it with 90% compacted fill and engineered (soil -cement) soil. No export or import of soil is proposed. The excavation will be made in slots of no more than 12 feet wide each. Subterranean drainage system and above ground drain swales and energy dissipaters will also be constructed. 7. The property is zoned RAS-1, and consists of 4.1 acres (180,000 square feet) of net lot area. The area affected by the proposed project will be 0.28 acres or 12,197 square feet. The total disturbed area, including the existing house and all of the existing impervious areas and the proposed slope repair, will be 53,837 square feet or 30% of the net lot area. 8. As a condition of approval, it is required that the disturbed area be re - vegetated with native plants and shrubs. 9. The approval of this application is subject to the County of Los Angeles Departments of Public Works and Building and Safety approval of the grading, soils, geology and drainage. The County's soils and geology divisions have approved the application with conditions, which will have to be met during the grading process. ENVIRONMENTAL REVIEW Pursuant to the requirements of the California Environmental Quality Act, (CEQA), staff reviewed the Initial Environmental Study prepared for the proposed project. The study identifies environmental factors, which would be potentially affected by the proposed project. Those factors that would be impacted include geology and soils due to grading on sloped areas; hydrology due to altering existing drainage pattern; and noise and traffic generated during construction. However, mitigation measures will be included with the project, which will lessen the impacts to level of insignificance. CEQA requires that affected property owners and local and County agencies be given at least 20 days to review the Negative Declaration prior to its adoption by the City. The report including the Negative Declaration was sent out to 19 local, County and State agencies for their review and comment. The Negative Declaration must include a list of mitigation measures, which when implemented, would avoid the effects or mitigate the effects on the environment to an insignificant level. No comments were received from any of the local, County or State agencies that had the opportunity to review the Initial Study and the Negative Declaration. ZC No. 644 CC 1/14/02 Q2) A list of mitigated measures approved by the Planning Commission, together with standard findings and conditions are incorporated into the resolution of approval. MITIGATED MEASURES The City of Rolling Hills Planning staff has determined that the following conditions or changes in the project are necessary in order to assure that there will be no substantial evidence that the proposed project may have a significant effect on the environment: 1. The property owners shall be required to conform with South Coast Air Quality Management District, Los Angeles County and local ordinances and engineering practices during construction by using dust control measures to stabilize the soil from wind erosion and reduce dust generated by construction activities. 2. Stockpiles of soil, sand and similar materials shall be stabilized by being enclosed, covered, watered twice daily, or with application of non -toxic soil binders. 3. Future individual Site Plan Review approvals by the Planning Commission shall include the following conditions with respect to mitigation for loss of mature native vegetation, erosion control, noise and traffic control .and stormwater pollution control, unless the City determines at the time of approval of a Site Plan, that such measures are no longer necessary or reasonable alternative method of preserving and mitigating the impacts: a. Any grading shall preserve the existing topography, flora, and natural features to the greatest extent possible. In order to minimize impacts to the hillsides and canyon areas on this property, the graded slopes shall be designed and developed in a manner that retains and restores native drought -tolerant plant life and preserves the existing contiguous topography, flora, and natural features of that area to the greatest extent possible. b. To prevent construction equipment from going beyond the limits of the site, contractors shall use fencing or other barriers to the greatest extent possible. Contractors shall be informed that work on the site shall not encroach into natural vegetation areas except as specified on the approved Site Plan to the greatest extent possible. c. No grading, development, or removal of live mature vegetation shall be permitted in areas not approved for remediation. In the event removal or thinning of mature natural vegetation is required to comply with Fire Department Regulations, the least invasive technique shall be utilized. ZC No. 644 CC 1/14/02 • • d. No contractor, operator of a bulldozer or other equipment or other construction worker on the site shall allow equipment, supplies or soil to encroach into the area not being remediated. e. No chemicals, including but not limited to fertilizers, pesticides, herbicides, detergents, chlorine or pool chemicals, shall be used, disposed of, or allowed to drain into adjacent areas, except fertilizers approved by the City. f. Nothing contained in these conditions shall limit the authority of the City to require additional areas or greater areas of the parcel to be re -vegetated with native plants to mitigate additional impacts, if any. g. A bond in the amount of the cost estimate of the implementation of a re -vegetation and landscape plan plus 15%, shall be required to be posted prior to issuance of a grading permit and shall be retained with the City for not less than two years after landscape installation. The retained bond will be released, two years after the initial plantings, by the City Manager after the City Manager or his designee determine that the native plant re -vegetation and landscaping was installed pursuant to the landscape plan as approved, and that such landscaping is properly established and in good condition. h. An Erosion Control Plan containing the elements set forth is Section 7010 of the 1998 County of Los Angeles Uniform Building Code shall be prepared to minimize erosion and to protect slopes and channels to control stormwater pollution as required by the County of Los Angeles. J. Prior to the submittal of an applicable final grading plan for the slope failure repair to the County of Los Angeles for plan check, a detailed grading and drainage plan with related geology, soils and hydrology reports that conform to the development plan as approved by the Los Angeles County Land Development Section must be submitted to the Rolling Hills Planning Department staff for their review. During construction, the property owners shall be required to schedule and regulate construction and related traffic noise throughout the day between the hours of 7 AM and 6 PM, Monday through Saturday only, when construction and mechanical equipment noise is permitted so as not to interfere with the quiet residential environment of the City of Rolling Hills. k. During construction, the property owners shall be required to schedule and regulate truck traffic throughout the day between the ZC No. 644 CC 1/14/02 • • hours of 7 AM and 6 PM Monday through Saturday only so as not to interfere with the normal flow of traffic within the City of Rolling Hills. 1. The property owners shall be required to conform to the Regional. Water Quality Control Board and County Health Department requirements for the installation and maintenance of stormwater drainage facilities. m. The property owners shall be required to conform with the Regional Water Quality Control Board and County Public Works Department Best Management Practices (BMP's) related to solid waste. n. Nothing contained in these conditions shall limit the authority of the City to require additional conditions to mitigate additional impacts, if any. RECOMMENDATION It is recommended that the City Council receive and file Resolution No. 2002-01. ZC No. 644 CC 1/14/02 • RESOLUTION NO. 2002-01 A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE. REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL IN ZONING CASE NO. 644, (WANG). THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS DOES HEREBY FIND, RESOLVE AND ORDER AS FOLLOWS: Section 1. An application was duly filed by Mr. James Wang, with respect to real property located at 10 Poppy Trail, (Lot 3-PT) Rolling Hills, requesting a Site Plan Review approval for grading of 4,100 cubic yards of soil for the purpose of repairing slope failure. The subject property is developed with a single-family residence and a pool. Recently, concrete caissons were installed along the rear of the residence to prevent slippage of the structure. Section 2. The Planning Commission conducted a duly noticed public hearing to consider the application on December 18, 2001. Evidence was heard and presented from all persons interested in affecting said proposal, and from members of the City staff and the Planning Commission having reviewed, analyzed and studied said proposal. The applicant's representative was in attendance at the hearing. Section 3. The Planning staff prepared an initial study for the project on November 29, 2001. The initial study found that the project would not have a significant effect on the environment if certain measures were included in the project. The Negative Declaration was prepared with those mitigation measures and was circulated to the applicant and other interested parties in accordance with State of California CEQA Guidelines. The public notice of the Planning Commission's intent to recommend approval of the Negative Declaration was published. Copies of the Negative Declaration were sent to adjacent cities and other governmental agencies. No comments were received regarding this project from any state or local agencies. Section 4. The Planning Commission has reviewed the proposed Negative Declaration and finds that it represents the independent judgment of the City and that it was prepared in compliance with CEQA. Therefore, the Planning Commission finds that there will not be a significant effect on the environment because mitigation measures have been added to the project, and are incorporated herein as conditions of approval. Based upon these findings, the Planning Commission hereby adopts the Negative Declaration in accordance with the California Environmental Quality Act. Section 5. The Los Angeles County Department of Public Works Land Development Division and Building and Safety Division 'reviewed the subject application for the slope repair. The Los Angeles County staff found that the ZC No. 644 Reso. 2002-01 1 • proposed approach and. methodology for slope repair is appropriate and the project was recommended for approval with conditions. Section 6. Section 17.46.020(A)(1) requires a Site Plan Review for grading projects requiring a grading permit. With respect to the Site Plan Review application, the Planning Commission makes the following findings of fact: A. The proposed activity, as modified by the conditions of approval, is compatible with the General Plan and the Zoning Ordinance. The Land Use Element of the General Plan establishes the maintenance of strict grading practices to preserve the community's natural terrain. The Building Code and the Zoning Ordinance require a balanced cut and fill ratio and do not permit import or export of soil, except under special circumstances applicable to a property and with a discretionary permission by the Planning Commission. B. The proposed activity, as modified, by the conditions of approval, preserves and integrates into the site design, to the maximum extent feasible, existing natural topographic features of the lot including surrounding native vegetation, mature trees, drainage courses, and land forms (such as hillsides and knolls). Although grading of the existing slope is necessary to correct slope failure and for the installation of drainage devices, only 0.28 acres or 12,197 square feet of the 180,000 square feet of net lot area of the lot will be affected by the grading. C. The development plan, as modified by the conditions of approval, follows natural contours of the site to minimize grading. The natural drainage courses will be preserved and continue drainage to the canyons at the northeastern side of this lot. As a result of this activity drainage on site will be corrected, thus, preventing erosion of the slopes and the drainage will be directed to the canyons. D. The development plan will, based upon compliance with the conditions contained in this Resolution, supplement the existing vegetation with landscaping that is compatible with and enhances the rural character of the community. Upon completion of the project the graded slopes will be re - vegetated with native trees and shrubs. E. The development plan, as modified by the conditions of approval, substantially preserves the natural and undeveloped state of the lot by minimizing building coverage because no new structures are proposed. F. The proposed development, as modified by the conditions of approval, is harmonious in scale and mass with the site, the natural terrain and other residences on Poppy Trail. Grading will be minor and required only to repair the slope failure of the property. G. The proposed development, as modified by the conditions of approval, is sensitive and not detrimental to the convenience and safety of ZC No. 644 Reso. 2002-01 2 .1 circulation for pedestrians and vehicles because the proposed project will utilize the existing driveway access. H. The project conforms to the requirements of the California Environmental Quality Act and the Planning Commission has adopted a Negative Declaration. Section 7. Based upon the foregoing findings and the evidence in the record, the Planning Commission hereby approves the Site Plan Review application for Zoning Case No. 644 for grading and slope repair as indicated on the development plan incorporated herein as Exhibit A, subject to the following conditions: A. The Site Plan Review approval shall expire within one year from the effective date of approval if construction pursuant to this approval has not commenced within that time period, as required by Section 17.46.080(A) of the Rolling Hills Municipal Code, or the approval granted is otherwise extended the Site Plan pursuant to the requirements of that section. B. It is declared and made a condition of the Site Plan Review approval, that if any conditions thereof are violated, this approval shall be suspended and the privileges granted thereunder shall lapse; provided that the applicants have been given written notice to cease such violation, the opportunity for a hearing has been provided, and if requested, has been held, and thereafter the applicant fails to correct the violation within a period of thirty (30) days from the date of the City's determination. C. All requirements of the Buildings and Construction Ordinance, the Zoning Ordinance, and of the zone in which the subject property is located must be complied with unless otherwise set forth in the Permit, or shown otherwise on an approved plan. D. The lot shall be developed and maintained in substantial conformance with the site plan on file marked Exhibit A and dated December 12, 2001, except as otherwise provided in these conditions. E. The working drawings submitted to the County Department of Building and Safety for plan check review must conform to the development plan approved with this application. F. This Site Plan Review approval is subject to all applicable requirements and conditions of the State of California, the County of Los Angeles, the City of Rolling Hills, any other governmental entities having reviewed this project, and the requirements of the Rolling Hills Community Association. The duty of inquiry as to such requirements shall be upon the applicant. G. The applicant shall comply with all the requirements of the Rolling Hills Municipal Code, and all requirements of the City of Rolling Hills ZC No. 644 Reso. 2002-01 3 • • ordinances, resolutions, engineering standards and other applicable standards, that are in effect at the time that slope repair improvement permit is issued for the project. H. In accordance with Chapter 1706 of the California State Statutes of 1990, the applicant shall pay any required fee, along with the required processing fee, to the City of Rolling Hills and County Clerk for remittance to the State Department of Fish and Game. This approval shall not be valid and effective unless and until the fee(s) have been paid and the Notice of Determination has been filed. I. The property owner shall defend, indemnify, and hold harmless the City of Rolling Hills and its officers, employees and agents from and against any claim, action or proceeding against the City of Rolling Hills, its officers, employees, or agents to attack, set aside, void, or annul any approval or condition of approval of the City of Rolling Hills concerning this Site Plan Review application, including but not limited to any approval or condition of approval of the City Council, Planning Commission or Planning Director, which action is brought within the time period provided for in Government Code Section 66499.37. The City shall promptly notify the applicant of any claim, action, or proceeding concerning the application and the City shall cooperate fully in the defense of the matter. The City reserves the right, at its own option, to choose its own attorney to represent the City, its officers, employees and agents in the defense of the matter. J. Grading shall not exceed 4,100 cubic yards of cut and 4,100 cubic yards of fill and shall be balanced on site, and shall not affect more than 0.28 acres of the net lot area. K. The disturbed area of the lot, which includes the existing disturbed areas and the proposed slope repair area, shall not exceed 53,837 square feet or 30.0% of the net lot area in conformance with lot disturbance limitations. L. A County of Los Angeles Public Works Department approved geology and/or soils engineering report shall be required prior to approval of grading plans. M. A grading plan shall be geotechnically approved by the Los Angeles County Geology and Soils Sections prior to commencing any work on subject property. This grading plan shall be based on a detailed engineering geology report and soils engineering report and show all recommendations submitted by the County staff. Prior to the commencement of the project, the applicant shall deposit the dollar amount of a County approved estimate for a bond for the grading plan. N. An Erosion Control Plan containing the elements set forth is Section 7010 of the 1998 County of Los Angeles Uniform Building Code shall be prepared to minimize erosion and to protect slopes and channels to control stormwater pollution as required by the County of Los Angeles. ZC No. 644 Reso. 2002-01 4 1 O. Intensive geotechnical review and supervision shall be required throughout the time the project is ongoing. P. The applicant shall implement Best Management Practices of the National Pollution Discharge Elimination System (NPDES) and provide adequate landscaping after grading and repairs to the slope is completed. Further, an "Urban Storm Water Mitigation Plan" is required as the project qualifies as a hillside -located single family dwelling. Q. Any grading shall preserve the existing topography, flora, and natural features to the greatest extent possible. In order to minimize impacts to the hillsides and canyon areas on this property, the graded slopes shall be designed and developed in a manner that retains and restores native drought - tolerant plant life and preserves the existing contiguous topography, flora, and natural features of that area to the greatest extent possible. R. Landscaping shall include water efficient irrigation, to the. maximum extent feasible, that incorporates low gallonage irrigation system, utilizes automatic controllers, incorporates an irrigation design using "hydrozones," considers slope factors and climate conditions in design, and utilizes means to reduce water waste resulting from runoff and overspray in accordance with Section 17.27.020 (Water efficient landscaping requirements) of the Rolling Hills Municipal Code. S. Mitigation areas shall be planted with native plants at the following densities: (1) 1 to 2 gallon containers of low, relatively fast growing shrubs planted at approximately five feet (5') on center, including but not limited to Venturan coastal sage scrub, Purple sage scrub, California sagebrush scrub; and (2) 2 to 10 gallon containers (depending upon availability and condition of the plants) of slower growing shrubs interspersed in an irregular pattern, including but not limited to Lemonadeberry, Toyon, and Elderberry. (3) If trees are proposed to be planted, they shall be of native type, and which at full maturity shall not exceed 25 feet in height so as not to obstruct views of neighboring properties, and shall be approved by the Planning Department staff. Two copies of landscape plan for the graded/repaired area and a cost estimate for material, labor and irrigation to implement the landscaping plan must be submitted for review by the Planning Department prior to the issuance of grading permit. A bond in the amount of the cost estimate of the implementation of the landscaping plan plus 15% shall be required to be posted prior to issuance of a grading permit and shall be retained with the City for not less than two years ZC No. 644 Reso. 2002-01 5 • after landscape installation. After the two-year period, upon the request of the applicant, the retained bond will be released by the City Manager after the City Manager or his designee determines that the landscaping was installed pursuant to the landscaping plan as approved, and that such landscaping is properly established and in good condition. T. To prevent construction equipment from going beyond the limits of the remediation area, contractors shall use fencing or other barriers to the greatest extent possible. Contractors shall be informed that work on the site shall not encroach into the natural vegetation areas of the lot. U. The property owners shall be required to conform with South Coast Air Quality Management District, Los Angeles County and local ordinances and engineering practices during construction by using dust control measures to stabilize the soil from wind erosion and reduce dust and objectionable odors generated by construction activities. Stockpiles of soil, sand and similar materials shall be stabilized by being enclosed, covered, watered twice daily, or with application of non -toxic soil binders. V. During construction, conformance with the air quality management district requirements, stormwater pollution prevention practices, county and local ordinances and engineering practices so that people or property are not exposed to undue vehicle trips, noise, dust, and objectionable odorsshall be required. W. During and after construction, all parking shall take place on the project site and, if necessary, any overflow parking shall take place within nearby roadway easements. X. During construction, the property owners shall be required to schedule and regulate construction and related traffic noise throughout the day between the hours of 7 AM and 6 PM, Monday through Saturday only, when construction and mechanical equipment noise is permitted, so as not to interfere with the quiet residential environment of the City of Rolling Hills. Y. The applicant may be required to utilize mufflers on equipment that generates noise above acceptable levels. Z. The property owners shall be required to conform to the Regional Water Quality Control Board and County Health Department requirements for the installation and maintenance of stormwater drainage facilities. AA. After construction, the property owner shall keep the drainage devices clear at all times of debris, soil, vegetation and any other materials. AB. Should the repair activity be halted for any reason, (i.e. inclement weather), the property owner shall take appropriate measures, as determined by ZC No. 644 Reso. 2002-01 6 the Building Official, to minimize the seepage of any water into the area of slope failure. AC. The property owners shall be required to conform with the Regional Water Quality Control Board and County Public Works Department Best Management Practices (BMP's) related to solid waste. AD. A drainage plan system shall be approved by the County District Engineer, to include any water from the site irrigation systems and natural flow and all drainage from the site shall be conveyed in an approved manner. AE. A detailed and ' final drainage plan that conforms to the development plan as approved by the Planning Commission shall be submitted to the Rolling Hills Planning Department staff for their review and approval. AF. Until the applicants execute an Affidavit of Acceptance of all conditions of this Site Plan Review approval, as required by Section 17.42.070 the approvals shall not be effective. AG. All conditions of the Site Plan approval, that apply, shall be complied with prior to the issuance of a grading permit from the County of Los Angeles. PASSED, APPROVED AND ADOPTED THIS 12TH DAY OF JANUARY 2002. ALLAN ROBERTS, CHAIRMAN ATTEST: MARILYN KERN, DEPUTY CITY CLERK ZC No. 644 Reso. 2002-01 7 • • STATE OF CALIFORNIA ) COUNTY OF LOS ANGELES ) §§ CITY OF ROLLING HILLS I certify that the foregoing Resolution No. 2002-01 entitled: A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF, ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL IN ZONING CASE NO. 644, (WANG). was approved and adopted at a regular meeting of the Planning Commission on January 12, 2002 by the following roll call vote: AYES: NOES: ABSENT: ABSTAIN: and in compliance with the laws of California was posted at the following: Administrative Offices. DEPUTY CITY CLERK ZC No. 644 Reso. 2002-01 8 DATE: TO: FROM: a City 0/ JANUARY 12, 2002 • INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 (310) 377-1521 FAX: (310) 377-7288 E-mail: cityofrh@aol.com HONORABLE MEMBERS OF THE PLANNING COMMISSION YOLANTA SCHWARTZ, PRINCIPAL PLANNER APPLICATION NO. SITE LOCATION: ZONING AND SIZE: APPLICANT: REPRESENTATIVE: PUBLISHED: REOUEST ZONING CASE NO. 644 10 POPPY TRAIL, (LOT 3-PT) RAS-1, 4.5 ACRES GROSS MR. JAMES WANG DOUG McHATTIE, BOLTON ENGINEERING NOVEMBER 29, 2001 Request for a Site Plan Review to permit substantial grading (approximately 4,100 cubic yards of soil) to repair slope failure at an existing single family residential lot. BACKGROUND 1. The Planning Commission at the December 18, 2001, meeting directed staff to prepare a Resolution of approval regarding a Site Plan Review to permit substantial grading of a lot, which is subject to slope failure at an existing single family residence in Zoning Case No. 644. Only the area affected by the slope failure will be graded. No other improvements or construction is proposed with this application. The vote was 5-0. The Commission waived a field trip to this site. 2. Staff has not received any comments regarding this application from any of the Local, County or State agencies, which were required to be notified of this project. RECOMMENDATION It is recommended that the Planning Commission adopt Resolution No. 2002-01, which is attached, approving Zoning Case No. 644, and adopt the Negative Declaration for this project. •s Printed on Recycled Paper. RESOLUTION NO. 2002-01 A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL IN ZONING CASE NO. 644, (WANG). THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS DOES HEREBY FIND, RESOLVE AND ORDER AS FOLLOWS: Section 1. An application was duly filed by Mr. James Wang, with respect to real property located at 10 Poppy Trail, (Lot 3-PT) Rolling Hills, requesting a Site Plan Review approval for grading of 4,100 cubic yards of soil for the purpose of repairing slope failure. The subject property is developed with a single-family residence and a pool. Recently, concrete caissons were installed along the rear of the residence to prevent slippage of the structure. Section 2. The Planning Commission conducted a duly noticed public hearing to consider the application on December 18, 2001. Evidence was heard and presented from all persons interested in affecting said proposal, and from members of the City staff and the Planning Commission having reviewed, analyzed and studied said proposal. The applicant's representative was in attendance at the hearing. Section 3. The Planning staff prepared an initial study for the project on November 29, 2001. The initial study found that the project would not have a significant effect on the environment if certain measures were included in the project. The Negative Declaration was prepared with those mitigation measures and was circulated to the applicant and other interested parties in accordance with State of California CEQA Guidelines. The public notice of the Planning Commission's intent to recommend approval of the Negative Declaration was published. Copies of the Negative Declaration were sent to adjacent cities and other governmental agencies. No comments were received regarding this project from any state or local agencies. Section 4. The Planning Commission has reviewed the proposed Negative Declaration and finds that it represents the independent judgment of the City and that it was prepared in compliance with CEQA. Therefore, the Planning Commission finds that there will not be a significant effect on the environment because mitigation measures have been added to the project, and are incorporated herein as conditions of approval. Based upon these findings, the Planning Commission hereby adopts the Negative Declaration in accordance with the California Environmental Quality Act. Section 5. The Los Angeles County Department of Public Works Land Development Division and Building and Safety Division reviewed the subject application for the slope repair. The Los Angeles County staff found that the ZC No. 644 Reso. 2002-01 1 proposed approach and methodology for slope repair is appropriate and the project was recommended for approval with conditions. Section 6. Section 17.46.020(A)(1) requires a Site Plan Review for grading projects requiring a grading permit. With respect to the Site Plan Review application, the Planning Commission makes the following findings of fact: A. The proposed activity, as modified by the conditions of approval, is compatible with the General Plan and the Zoning Ordinance. The Land Use Element of the General Plan establishes the maintenance of strict grading practices to preserve the community's natural terrain. The Building Code and the Zoning Ordinance require a balanced cut and fill ratio and do not permit import or export of soil, except under special circumstances applicable to a property and with a discretionary permission by the Planning Commission. B. The proposed activity, as modified, by the conditions of approval, preserves and integrates into the site design, to the maximum extent feasible, existing natural topographic features of the lot including surrounding native vegetation, mature trees, drainage courses, and land forms (such as hillsides and knolls). Although grading of the existing slope is necessary to correct slope failure and for the installation of drainage devices, only 0.28 acres or 12,197 square feet of the 180,000 square feet of net lot area of the lot will be affected by the grading. C. The development plan, as modified by the conditions of approval, follows natural contours of the site to minimize grading. The natural drainage courses will be preserved and continue drainage to the canyons at the northeastern side of this lot. As a result of this activity drainage on site will be corrected, thus, preventing erosion of the slopes and the drainage will be directed to the canyons. D. The development plan will, based upon compliance with the conditions contained in this Resolution, supplement the existing vegetation with landscaping that is compatible with and enhances the rural character of the community. Upon completion of the project the graded slopes will be re - vegetated with native trees and shrubs. E. The development plan, as modified by the conditions of approval, substantially preserves the natural and undeveloped state of the lot by minimizing building coverage because no new structures are proposed. F. The proposed development, as modified by the conditions of approval, is harmonious in scale and mass with the site, the natural terrain and other residences on .Poppy Trail. Grading will be minor and required only to repair the slope failure of the property. G. The proposed development, as modified by the conditions of approval, is sensitive and not detrimental to the convenience and safety of ZC No. 644 Reso. 2002-01 2 circulation for pedestrians and vehicles because the proposed project will utilize the existing driveway access. H. The project conforms to the requirements of the California Environmental Quality Act and the Planning Commission has adopted a Negative Declaration. Section 7. Based upon the foregoing findings and the evidence in the record, the Planning Commission hereby approves the Site Plan Review application for Zoning Case No. 644 for grading and slope repair as indicated on the development plan incorporated herein as Exhibit A, subject to the following conditions: A. The Site Plan Review approval shall expire within one year from the effective date of approval if construction pursuant to this approval has not commenced within that time period, as required by Section 17.46.080(A) of the Rolling Hills Municipal Code, or the approval granted is otherwise extended the Site Plan pursuant to the requirements of that section. B. It is declared and made a condition of the Site Plan Review approval, that if any conditions thereof are violated, this approval shall be suspended and the privileges granted thereunder shall lapse; provided that the applicants have been given written notice to cease such violation, the opportunity for a hearing has been provided, and if requested, has been held, and thereafter the applicant fails to correct the violation within a period of thirty (30) days from the date of the City's determination. C. All requirements of the Buildings and Construction Ordinance, the Zoning Ordinance, and of the zone in which the subject property is located must be complied with unless otherwise set forth in the Permit, or shown otherwise on an approved plan. D. The lot shall be developed and maintained in substantial conformance with the site plan on file marked Exhibit A and dated December 12, 2001, except as otherwise provided in these conditions. E. The working drawings submitted to the County Department of Building and Safety for plan check review must conform to the development plan approved with this application. F. This Site Plan Review approval is subject to all applicable requirements and conditions of the State of California, the County of Los Angeles, the City of Rolling Hills, any other governmental entities having reviewed this project, and the requirements of the Rolling Hills Community Association. The duty of inquiry as to such requirements shall be upon the applicant. G. The applicant shall comply with all the requirements of the Rolling Hills Municipal Code, and all requirements of the City of Rolling Hills ZC No. 644 Reso. 2002-01 3 ordinances, resolutions, engineering standards and other applicable standards, that are in effect at the time that slope repair improvement permit is issued for the project. H. In accordance with Chapter 1706 of the California State Statutes of 1990, the applicant shall pay any required fee, along with the required processing fee, to the City of Rolling Hills and County Clerk for remittance to the State Department of Fish and Game. This approval shall not be valid and effective unless and until the fee(s) have been paid and the Notice of Determination has been filed. I. The property owner shall defend, indemnify, and hold harmless the City of Rolling Hills and its officers, employees and agents from and against any claim, action or proceeding against the City of Rolling Hills, its officers, employees, or agents to attack, set aside, void, or annul any approval or condition of approval of the City of Rolling Hills concerning this Site Plan Review application, including but not limited to any approval or condition of approval of the City Council, Planning Commission or Planning Director, which action is brought within the time period provided for in Government Code Section 66499.37. The City shall promptly notify the applicant of any claim, action, or proceeding concerning the application and the City shall cooperate fully in the defense of the matter. The City reserves the right, at its own option, to choose its own attorney to represent the City, its officers, employees and agents in the defense of the matter. J. Grading shall not exceed 4,100 cubic yards of cut and 4,100 cubic yards of fill and shall be balanced on site, and shall not affect more than 0.28 acres of the net lot area. K. The disturbed area of the lot, which includes the existing disturbed areas and the proposed slope repair area, shall not exceed 53,837 square feet or 30.0% of the net lot area in conformance with lot disturbance limitations. L. A County of Los Angeles Public Works Department approved geology and/or soils engineering report shall be required prior to approval of grading plans. M. A grading plan shall be geotechnically approved by the Los Angeles County Geology and Soils Sections prior to commencing any work on subject property. This grading plan shall be based on a detailed engineering geology report and soils engineering report and show all recommendations submitted by the County staff. Prior to the commencement of the project, the applicant shall deposit the dollar amount of a County approved estimate for a bond for the grading plan. N. An Erosion Control Plan containing the elements set forth is Section 7010 of the 1998 County of Los Angeles Uniform Building Code shall be prepared to minimize erosion and to protect slopes and channels to control stormwater pollution as required by the County of Los Angeles. ZC No. 644 Reso. 2002-01 4 O. Intensive geotechnical review and supervision shall be required throughout the time the project is ongoing. P. The applicant shall implement Best Management Practices of the National Pollution Discharge Elimination System (NPDES) and provide adequate landscaping after grading and repairs to the slope is completed. Further, an "Urban Storm Water Mitigation Plan" is required as the project qualifies as a hillside -located single family dwelling. Q. Any grading shall preserve the existing topography, flora, and natural features to the greatest extent possible. In order to minimize impacts to the hillsides and canyon areas on this property, the graded slopes shall be designed and developed in a manner that retains and restores native drought - tolerant plant life and preserves the existing contiguous topography, flora, and natural features of that area to the greatest extent possible. R. Landscaping shall include water efficient irrigation, to the maximum extent feasible, that incorporates low gallonage irrigation system, utilizes automatic controllers, incorporates an irrigation design using "hydrozones," considers slope factors and climate conditions in design, and utilizes means to reduce water waste resulting from runoff and overspray in accordance with Section 17.27.020 (Water efficient landscaping requirements) of the Rolling Hills Municipal Code. S. Mitigation areas shall be planted with native plants at the following densities: (1) 1 to 2 gallon containers of low, relatively fast growing shrubs planted at approximately five feet (5') on center, including but not limited to Venturan coastal sage scrub, Purple sage scrub, California sagebrush scrub; and (2) 2 to 10 gallon containers (depending upon availability and condition of the plants) of slower growing shrubs interspersed in an irregular pattern, including but not limited to Lemonadeberry, Toyon, and Elderberry. (3) If trees are proposed to be planted, they shall be of native type, and which at full maturity shall not exceed 25 feet in height so as not to obstruct views of neighboring properties, and shall be approved by the Planning Department staff. Two copies of landscape plan for the graded/repaired area and a cost estimate for material, labor and irrigation to implement the landscaping plan must be submitted for review by the Planning Department prior to the issuance of grading permit. A bond in the amount of the cost estimate of the implementation of the landscaping plan plus 15% shall be required to be posted prior to issuance of a grading permit and shall be retained with the City for not less than two years ZC No. 644 Reso. 2002-01 5 after landscape installation. After the two-year period, upon the request of the applicant, the retained bond will be released by the City Manager after the City Manager or his designee determines that the landscaping was installed pursuant to the landscaping plan as approved, and that such landscaping is properly established and in good condition. T. To prevent construction equipment from going beyond the limits of the remediation area, contractors shall use fencing or other barriers to the greatest extent possible. Contractors shall be informed that work on the site shall not encroach into the natural vegetation areas of the lot. U. The property owners shall be required to conform with South Coast Air Quality Management District, Los Angeles County and local ordinances and engineering practices during construction by using dust control measures to stabilize the soil from wind erosion and reduce dust and objectionable odors generated by construction activities. Stockpiles of soil, sand and similar materials shall be stabilized by being enclosed, covered, watered twice daily, or with application of non -toxic soil binders. V. During construction, conformance with the air quality management district requirements, stormwater pollution prevention practices, county and local ordinances and engineering practices so that people or property are not exposed to undue vehicle trips, noise, dust, and objectionable odors shall be required. W. During and after construction, all parking shall take place on the project site and, if necessary, any overflow parking shall take place within nearby roadway easements. X. During construction, the property owners shall be required to schedule and regulate construction and related traffic noise throughout the day between the hours of 7 AM and 6 PM, Monday through Saturday only, when construction and mechanical equipment noise is permitted, so as not to interfere with the quiet residential environment of the City of Rolling Hills. Y. The applicant may be required to utilize mufflers on equipment that generates noise above acceptable levels. Z. The property owners shall be required to conform to the Regional Water Quality Control Board and County Health Department requirements for the installation and maintenance of stormwater drainage facilities. AA. After construction, the property owner shall keep the drainage devices clear at all times of debris, soil, vegetation and any other materials. AB. Should the repair activity be halted for any reason, (i.e. inclement weather), the property owner shall take appropriate measures, as determined by ZC No. 644 Reso. 2002-01 6 the Building Official, to minimize the seepage of any water into the area of slope failure. AC. The property owners shall be required to conform with the Regional Water Quality Control Board and County Public Works Department Best Management Practices (BMP's) related to solid waste. AD. A drainage plan system shall be approved by the County District Engineer, to include any water from the site irrigation systems and natural flow and all drainage from the site shall be conveyed in an approved manner. AE. A detailed and final drainage plan that conforms to the development plan as approved by the Planning Commission shall be submitted to the Rolling Hills Planning Department staff for their review and approval. AF. Until the applicants execute an Affidavit of Acceptance of all conditions of this Site Plan Review approval, as required by Section 17.42.070 the approvals shall not be effective. AG. All conditions of the Site Plan approval, that apply, shall be complied with prior to the issuance of a grading permit from the County of Los Angeles. PASSED, APPROVED AND ADOPTED THIS 12TH DAY OF JANUARY 2002. ALLAN ROBERTS, CHAIRMAN ATTEST: MARILYN KERN, DEPUTY CITY CLERK ZC No. 644 Reso. 2002-01 7 • • STATE OF CALIFORNIA COUNTY OF LOS ANGELES ) §§ CITY OF ROLLING HILLS ) I certify that the foregoing Resolution No. 2002-01 entitled: A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT SUBSTANTIAL GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 10 POPPY TRAIL IN ZONING CASE NO. 644, (WANG). was approved and adopted at a regular meeting of the Planning Commission on January 12, 2002 by the following roll call vote: AYES: NOES: ABSENT: ABSTAIN: and in compliance with the laws of California was posted at the following: Administrative Offices. DEPUTY CITY CLERK ZC No. 644 Reso. 2002-01 8 DATE: TO: FROM: • City opeollinv DECEMBER 18, 2001 • 33 INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 (310) 377-1521 FAX: (310) 377-7288 E-mail: cityofrh@aol.com HONORABLE MEMBERS OF THE PLANNING COMMISSION YOLANTA SCHWARTZ, PRINCIPAL PLANNER APPLICATION NO. SITE LOCATION: ZONING AND SIZE: APPLICANT: REPRESENTATIVE: PUBLISHED: REOUEST ZONING CASE NO. 644 10 POPPY TRAIL, (LOT 3-PT) RAS-1, 4.5 ACRES GROSS MR. JAMES WANG DOUG McHATTIE, BOLTON ENGINEERING NOVEMBER 29, 2001 Request for a Site Plan Review to permit substantial grading (approximately 4,100 cubic yards of soil) to repair slope failure at an existing single family residential lot. BACKGROUND 1. The applicant is requesting a Site Plan Review to permit substantial grading of a lot, which is subject to slope failure. Improvements on the lot include a single- family residence and a pool. The property owners reside at the property. Section 17.46.030 of the Zoning Code requires a development plan to be submitted for site plan review and approval before any grading which requires a grading permit may commence. It is estimated that approximately 4,100 cubic yards of soil will be graded. The purpose for the grading request is to stabilize the slope. The site, after repair, will be returned to its current slope configuration. 2. Subject property is located in the RA-S-1 Zone, Residential Agricultural - Suburban 1-Acre minimum net lot area and consist of 4.1 acres net area, (4.5 acres gross). 3. The existing house with an attached garage, totaling 6,906 square feet, was constructed (finaled) in 1986. In 1998 the property developed fill slope failure and fissures and cracks appeared to the rear of the existing structure. The applicant submitted an application to the County of Los Angeles Public Works Department, Soils and Geology Division for remediation repairs. In August of 2000, the County' Soils and Geology Division approved the approach necessary to correct the slope failure. The County's Building and Safety Division staff is currently reviewing the final grading and drainage plans. Printed on Recycled Paper. 4. In 2000 the County issued a building permit for eleven caissons in order to underpin the house. The caissons have been installed. 5. The applicant is proposing to remove approximately 4,100 cubic yards of soil and replace it with 90% compacted fill and engineered (soil -cement) soil. No export or import of soil is anticipated. Subterranean drainage system and above ground drain swales and energy dissipaters will also be constructed. 6. The property is zoned RAS-1, and consists of 4.1 acres (180,000square feet) of net lot area. The area affected by the proposed project will be 0.28 acres or 12,197 square feet. The total disturbed area, including the existing house and all of the existing impervious areas, will be 53,837 square feet or 30% of the net lot area. 7. It will be required that the disturbed area be re -vegetated with native plants and shrubs. 8. The applicant's representative is working with County engineers to finalize the proposed grading and drainage plans. The approval of this application, if granted by the Planning Commission, will be subject to the County of Los Angeles Departments of Public Works and Building and Safety approval of the grading, soils, and drainage. ENVIRONMENTAL REVIEW Pursuant to the requirements of the California Environmental Quality Act, (CEQA), staff reviewed the Initial Environmental Study prepared for the proposed project. The study identifies environmental factors, which would be potentially affected by the proposed project. Those factors that would be impacted include geology and soils due to grading on sloped areas; hydrology due to altering existing drainage pattern; and noise and traffic generated during construction. However, mitigation measures will be included with the project, which will lessen the impacts to level of insignificance. CEQA requires that affected property owners and local and County agencies be given at least 20 days to review the Negative Declaration prior to its adoption by the City. The Negative Declaration must include a list of mitigation measures, which when implemented, would avoid the effects or mitigate the effects to a point where clearly no significant effect would occur. The Commission, the Council or other agencies could impose additional mitigation measures. Staff prepared a list of preliminary mitigated measures that, if approved by the Planning Commission will be incorporated into the resolution of approval and will have to be met prior to completion of this project. PRELIMINARY MITIGATED MEASURES • • The City of Rolling Hills Planning staff has determined that the following preliminary conditions or changes in the project are necessary in order to assure that there will be no substantial evidence that the proposed project may have a significant effect on the environment: 1. The property owners shall be required to conform with South Coast Air Quality Management District, Los Angeles County and local ordinances and engineering practices during construction by using dust control measures to stabilize the soil from wind erosion and reduce dust generated by construction activities. 2. Stockpiles of soil, sand and similar materials shall be stabilized by being enclosed, covered, watered twice daily, or with application of non -toxic soil binders. 3. Future individual Site Plan Review approvals by the Planning Commission shall include the following conditions with respect to mitigation for loss of mature native vegetation, erosion control, noise and traffic control and stormwater pollution control, unless the City determines at the time of approval of a Site Plan, that such measures are no longer necessary or reasonable alternative method of preserving and mitigating the impacts: a. Any grading shall preserve the existing topography, flora, and natural features to the greatest extent possible. In order to minimize impacts to the hillsides and canyon areas on this property, the graded slopes shall be designed and developed in a manner that retains and restores native drought -tolerant plant life and preserves the existing contiguous topography, flora, and natural features of that area to the greatest extent possible. b. To prevent construction equipment from going beyond the limits of the site, contractors shall use fencing or other barriers to the greatest extent possible. Contractors shall be informed that work on the site shall not encroach into natural vegetation areas except as specified on the approved Site Plan to the greatest extent possible. c. No grading, development, or removal of live mature vegetation shall be permitted in areas not approved for remediation. In the event removal or thinning of mature natural vegetation is required to comply with Fire Department Regulations, the least invasive technique shall be utilized. d. No contractor, operator of a bulldozer or other equipment or other construction worker on the site shall allow equipment, supplies or soil to encroach into the area not being remediated. e. No chemicals, including but not limited to fertilizers, pesticides, herbicides, detergents, chlorine or pool chemicals, shall be used, • disposed of, or allowed to drain into adjacent areas, except fertilizers approved by the City. f. Nothing contained in this conditions shall limit the authority of the City to require additional areas or greater areas of the parcel to be re -vegetated with native plants to mitigate additional impacts, if any. g• A bond in the amount of the cost estimate of the implementation of a re -vegetation and landscape plan plus 15%, shall be required to be posted prior to issuance of a grading permit and shall be retained with the City for not less than two years after landscape installation. The retained bond will be released, two years after the initial plantings, by the City Manager after the City manager or his designee determine that the native plant re -vegetation and landscaping was installed pursuant to the landscape plan as approved, and that such landscaping is properly established and in good condition. h. An Erosion Control Plan containing the elements set forth is Section 7010 of the 1998 County of Los Angeles Uniform Building Code shall be prepared to minimize erosion and to protect slopes and channels to control stormwater pollution as required by the County of Los Angeles. i• Prior to the submittal of an applicable final grading plan for the slope failure repair to the County of Los Angeles for plan check, a detailed grading and drainage plan with related geology, soils and hydrology reports that conform to the development plan as approved by the Los Angeles County Land Development Section must be submitted to the Rolling Hills Planning Department staff for their review. During construction, the property owners shall be required to schedule and regulate construction and related traffic noise throughout the day between the hours of 7 AM and 6 PM, Monday through Saturday only, when construction and mechanical equipment noise is permitted so as not to interfere with the quiet residential environment of the City of Rolling Hills. k. During construction, the property owners shall be required to schedule and regulate truck traffic throughout the day between the hours of 7 AM and 6 PM Monday through Saturday only so as not to interfere with the normal flow of traffic within the City of Rolling Hills. 1. The property owners shall be required to conform to the Regional Water Quality Control Board and County Health Department requirements for the installation and maintenance of stormwater drainage facilities. m. The property owners shall be required to conform with the Regional Water Quality Control Board and County Public Works Department Best Management Practices (BMP's) related to solid waste. n. Nothing contained in these conditions shall limit the authority of the City to require additional conditions to mitigate additional impacts, if any. The Planning Commission will have another opportunity to review and certify these measures after the appropriate agencies submit their comments and proposed mitigation measures. RECOMMENDATION It is recommended that the Planning Commission consider the staff report for Zoning Case No. 644, take public testimony and schedule a field visit, if appropriate.