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784, Repair landslide area, Staff Reportsefre, Rodept9 "Wee& INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CA 90274 (310) 377-1521 FAX (310) 377-7288 Agenda Item No.: 4B Mtg. Date: 7-26-10 DATE: JULY 26, 2010 TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL FROM: YOLANTA SCHWARTZ, PLANNING DIRECTOR THROUGH: ANTON DAHLERBRUCH, CITY MANAGER Yh// SUBJECT: RESOLUTION NO. 2010-11. A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 2900 PALOS VERDES DRIVE NORTH (LOT 993-4-RH) AND PROPERTIES ADJACENT THERETO IN ZONING CASE NO. 784, (CARLEY). PROJECT HAS BEEN DETERMINED TO BE EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA). RECOMMENDATION 1. It is recommended that the City Council receive and file this report or provide other direction to staff. REOUEST AND PLANNING COMMISSION ACTION 2. The applicants requested a Site Plan Review approval for grading of 133 cubic yards of cut and 78 cubic yards of fill (the remaining needed for compaction), over a 3,920 square foot surface area. The slope failure extends over four properties. All properties are developed with a single family residence and accessory structures. The Planning Commission unanimously adopted the attached Resolution, granting the request with conditions that: • Any modification to the plan shall be reported by staff to the Planning Commission • Submit landscaping plan for the mitigated area, showing drought tolerant and non-flammable plants • If new shrubs/trees to be planted, at maturity may not exceed 25-feet in height • Soils, geology, drainage and grading to be reviewed and approved by LA County Engineers -1- • • • No dumping of debris, construction material, soil spoils into the canyon The Planning Commission found that this project is minor in nature and is necessary to repair a failed slope. In addition, the drainage in the area would be corrected for the benefit of several neighbors. BACKGROUND 3. Subject properties are located in the RA-S-1 Zone. The slope failure affects 2,582 square foot area on the applicants' property (2900 PV Dr. N.); 730 square foot surface area at 2910 PV Dr. N.; 390 square feet on 2950 PV Dr. N.; and 218 square feet on 2954 PV Dr. N. 4. The property developed fill slope failure and fissures and cracks appeared to the rear of the existing driveway after the winter rains. To expedite the process, the applicants conducted geological explorations and prepared soils, geology report and grading and drainage plans. This information was submitted to the County geology and soils division and building and safety department for plan check simultaneously with the application to the City for Site Plan Review. 5. The County geology and soils engineers are in the process of reviewing the report and plans. The City's approval is subject to meeting all of the LA County building and safety and soils and geology conditions. 6. As recommended by the geology and soils consultants, the project will entail removal of the loose landslide material and replace it with 90% compacted fill and engineered soil. A ten -foot wide key at the toe of the failed area is proposed with subdrains. All new remedial fill will be keyed and benched into the existing competent soil material. The depth of excavation for the keyway will vary between 3-7 feet. No export or import of soil is anticipated at this time. However, depending on the soil condition to be determined during excavation, it may be necessary to augment some of the quantities of dirt. 7. The property is zoned RAS-1, and consists of 41,060 square feet of net lot area. The area affected by the proposed project will be 0.09 acres or 3,920 square feet, of which 2,582 is located on 2900 Palos Verdes Derive North (the applicant). The total disturbed area, including the existing house and all of the existing impervious areas, will be 16,600 square feet or 40.0% of the net lot area, which is at the maximum permitted. Pursuant to the City's regulations, remedial grading is considered disturbance and is included in the maximum disturbance calculations. Any additional grading or disturbance in the future on subject lot would require a Variance approval to exceed the 40% maximum disturbance allowed. 8. It is required that the disturbed area is re -vegetated with native drought tolerant plants and shrubs and that landscaping plan be submitted to the City prior to grading. All four property owners will be required to agree to the planting plan and each will be responsible for the upkeep of the area on their respective properties. -2ED2, - • • 9. The applicant's representative is working with County engineers to finalize the proposed grading and drainage plans. The slope failed into a natural drainage course. The flow line will be redesigned to County standards. 10 Prior to grading, the applicant will be required to submit to the City and County an "offsite grading covenant" or other acceptable agreement from each property owner granting permission to the applicants to do work on their property. 11. In conclusion, the project entails a slope repair, which is necessary in order to stabilize a failed slope. SITE PLAN REVIEW CRITERIA 17.46.010 Purpose. The site plan review process is established to provide discretionary review of certain development projects in the City for the purposes of ensuring that the proposed project is consistent with the City's General Plan; incorporates environmentally and aesthetically sensitive grading practices; preserves existing mature vegetation; is compatible and consistent with the scale, massing and development pattern in the immediate project vicinity; and otherwise preserves and protects the health, safety and welfare of the citizens of Rolling Hills. 17.46.050 Required findings. A. The Commission shall be required to make findings in acting to approve, conditionally approve, or deny a site plan review application. B. No project which requires site plan review approval shall be approved by the Commission, or by the City Council on appeal, unless the following findings can be made: 1. The project complies with and is consistent with the goals and policies of the general plan and all requirements of the zoning ordinance; 2. The project substantially preserves the natural and undeveloped state of the lot by minimizing building coverage. Lot coverage requirements are regarded as maximums, and the actual amount of lot coverage permitted depends upon the existing buildable area of the lot; 3. The project is harmonious in scale and mass with the site, the natural terrain and surrounding residences; 4. The project preserves and integrates into the site design, to the greatest extent possible, existing topographic features of the site, including surrounding native vegetation, mature trees, drainage courses and land forms (such as hillsides and knolls); 5. Grading has been designed to follow natural contours of the site and to minimize the amount of grading required to create the building area; 6. Grading will not modify existing drainage channels nor redirect drainage flow, unless such flow is redirected into an existing drainage course; 7. The project preserves surrounding native vegetation and mature trees and supplements these elements with drought -tolerant landscaping which is • • compatible with and enhances the rural character of the community, and landscaping provides a buffer or transition area between private and public areas; 8. The project is sensitive and not detrimental to the convenient and safe movement of pedestrians and vehicles; and 9. The project conforms to the requirements of the California Environmental Quality Act. SOURCE: City of Rolling Hills Zoning Ordinance • • RESOLUTION NO. 2010-11 A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 2900 PALOS VERDES DRIVE NORTH (LOT 993-4-RH) AND PROPERT'ES ADJACENT THERETO IN ZONING CASE NO. 784, (CARLEY). PROJECT HAS BEEN DETERMI.NED TO BE EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA). 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. and Mrs. Jim Carley, with respect to real property located at 2900 Palos Verdes Drive North, Rolling Hills, requesting a Site Plan Review approval for grading of 133 cubic yards of cut and 78 cubic yards of fill (the remaining needed for compaction), over a 3,920 square foot surface area. The slope failure extends over four properties. All properties are developed with a single family residence and accessory structures. Section 2. The Planning Commission conducted a duly noticed public hearing to consider the application on June 15, 2010 in the field. 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. No public came forward to address the project. Section 3. The Planning Commission finds that the project qualifies as an exemption, and is therefore categorically exempt from environmental review under the California Environmental Quality Act. Section 4. 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 proposed approach and methodology for slope repair is appropriate and the project was recommended for approval. Section 5. Subject properties are located in the RA-S-1 Zone. The slope failure affects 2,582 square foot area on the applicants' property (2900 PV Dr. N.); 730 square foot surface area at 2910 PV Dr. N.; 390 square feet on 2950 PV Dr. N.; and 218 square feet on 2954 PV Dr. N. 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: ZC 784 1 c5D • • A. The proposed activity, as conditioned, 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. It is projected that all of the dirt will be used from the site. 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 0.09 acres or 3,920 square feet over four parcel area 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 canyon 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 canyon. 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 substantially preserves the natural and undeveloped state of the lot by minimizing building coverage because no new structures are proposed. F. The proposed project is harmonious in scale and mass with the site, the natural terrain and other residences in the vicinity. Grading will be minor and required only to repair the slope failure of the property. 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. 784 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 two 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 ZC 784 2o • 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, including obtaining cooperation in a written form from adjacent property owners who are affected by the slope failure to enter their property for the repair purpose. D. The lot shall be developed and maintained in substantial conformance with the site plan on file marked. Exhibit A and dated May 19, 2010, 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 substantially conform to the development plan approved with this application. The County Engineer may require minor changes, which shall be reported to City staff. 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 pertaining to easements. The duty of inquiry as to such requirements shall be upon the applicant. G. 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. H. Grading shall not exceed 3,920 square feet surface area, 133 cubic yards of cut and shall be balanced on site, unless approved by staff as a minor modification. The project shall be completed to County Engineer's requirements and satisfaction. I. The disturbed area of the lot, which includes the existing disturbed areas and the proposed slope repair area, shall not exceed 16,000 square feet or 40.0% of the net lot area in conformance with lot disturbance limitations. J. 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 ZC 784 • • 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. K. A drainage plan system shall be approved by the County Drainage 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. L. An Erosion Control Plan containing the elements set forth is Section 7010 of the 2007 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. M. Intensive geoteclmical review and supervision shall be required throughout the time the project is ongoing. N. Two copies of landscape plan for the graded/repaired area shall be submitted for review by the Planning Department prior to the issuance of grading permit. Landscaping shall include water efficient low gallonage irrigation system that 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. Mitigation areas shall be planted with native plants at the following densities: (1) 1 to 2 gallon containers of non-flammable, low and relatively fast growing drought tolerant shrubs planted at approximately five feet (5') on center, (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 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. O. 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. There shall be no dumping of soil, construction material or any other debris into the canyon. P. 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. ZC 784 1 • Q. 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. R. 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. S. After construction, the property owner shall keep the drainage devices clear at all times of debris, soil, vegetation and any other materials. T. Should the repair activity be halted for any reason, (i.e. inclement weather), the property owner shall take appropriate measures, as determined by the Building Official, to minimize the seepage of any water into the area of slope failure. U. A detailed and final drainage plan as approved by the L.A.County Grading and Drainage Engineer shall be submitted to the City. V. Notwithstanding the above conditions, any modification to the plan dated May 18, 2010, as required by the applicants' soils engineer and LA County Public Works Department shall be reported to the Planning Commission by City staff. W. 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. X. All conditions of the Site Plan approval, that apply, shall be complied with prior to the issuance of a grading permit. Y. These conditions of approval shall be printed on all construction plans. Z. Any action challenging the final decision of the City made as a result of the public hearing on this application must be filed within the time limits set forth in Section 17.54.070 of the Rolling Hills Municipal Code and Code of Civil Procedure Section 1094.6. PASSED, APPROVED AND ADOPTED THIS 20TH DAY OF JULY 2010. N DEROY, CHAISON ATTE H " I U DEF ZTY CITY CLERK ZC 784 • • STATE OF CALIFORNIA COUNTY OF LOS ANGELES ) §§ CITY OF ROLLING HILLS I certify that the foregoing Resolution No. 2010-11 entitled: A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 2900 PALOS VERDES DRIVE NORTH (LOT 993-4-RH) AND PROPERTIES ADJACENT THERETO IN ZONING CASE: NO. 784, (CARLEY). PROJECT HAS BEEN DETERMINED TO BE EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA). was approved and adopted at a regular meeting of the Planning Commission on July 20, 2010 by the following roll call vote: AYES: Commissioners Chelf, Henke, Pieper, Vice Chairperson Smith and Chairperson DeRoy. NOES: None. ABSENT: None. ABSTAIN: None. and in compliance with the laws of California was posted at the following: Administrative Si ices. ZC 784 1 COB C DATE: TO: FROM: 'Pry Ro€6:09 geeta JULY 20, 2010 • INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CA 90274 (310) 377-1521 FAX (310) 377-7288 HONORABLE CHAIRPERSON AND MEMBERS OF THE PLANNING COMMISSION YOLANTA SCHWARTZ, PLANNING DIRECTOR APPLICATION NO. SITE LOCATION: ZONING AND SIZE: APPLICANT: REPRESENTATIVE: PUBLISHED: ZONING CASE NO. 784 2900 PALOS VERDES DRIVE N. (Lot 993-4-RH) RAS-1, 1.17 ACRES MR. AND MRS. JIM CARLEY DOUG McHATTIE, BOLTON ENGINEERING JUNE 3, 2010 REQUEST AND RECOMMENDATION Request for a Site Plan Review to permit grading of 133 cubic yards of cut and 78 cubic yards of fill of surficial grading over a 3,920 square foot surface area to repair slope failure at existing single family residential lots. 4 properties are affected by the slope failure. It is recommended that the Planning Commission adopt Resolution No. 2010-11. BACKGROUND The Planning Commission held a public hearing and a site visit on June 15, 2010 and directed staff to prepare a resolution approving the project. The attached resolution contains standard findings of facts and conditions recommended by the Planning Commission, including: • Any modification to the plan shall be reported by staff to the Planning Commission. • Submit landscaping plan for the mitigated area, showing drought tolerant and non-flammable plants • If new shrubs/trees to be planted, at maturity may not exceed 25-feet in height • Soils, geology, drainage and grading to be reviewed and approved by LA County Engineers. • No dumping of debris, construction material, soil spoils into the canyon. • This page is intentionally blank. • • RESOLUTION NO. 2010-11 A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 2900 PALOS VERDES DRIVE NORTH (LOT 993-4-RH) AND PROPERTIES ADJACENT THERETO IN ZONING CASE NO. 784, (CARLEY). PROJECT HAS BEEN DETERIvMINED TO BE EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA). 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. and Mrs. Jim Carley, with respect to real property located at 2900 Palos Verdes Drive North, Rolling Hills, requesting a Site Plan Review approval for grading of 133 cubic yards of cut and 78 cubic yards of fill (the remaining needed for compaction), over a 3,920 square foot surface area. The slope failure extends over four properties. All properties are developed with a single family residence and accessory structures. Section 2. The Planning Commission conducted a duly noticed public hearing to consider the application on June 15, 2010 in the field. 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. No public came forward to address the project. Section 3. The Planning Commission finds that the project qualifies as an exemption, and is therefore categorically exempt from environmental review under the California Environmental Quality Act. Section 4. 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 proposed approach and methodology for slope repair is appropriate and the project was recommended for approval. Section 5. Subject properties are located in the RA-S-1 Zone. The slope failure affects 2,582 square foot area on the applicants' property (2900 PV Dr. N.); 730 square foot surface area at 2910 PV Dr. N.; 390 square feet on 2950 PV Dr. N.; and 218 square feet on 2954 PV Dr. N. 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: ZC 784 CD • • A. The proposed activity, as conditioned, 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. It is projected that all of the dirt will be used from the site. 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 0.09 acres or 3,920 square feet over. four parcel area 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 canyon 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 canyon. 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 substantially preserves the natural and undeveloped state of the lot by minimizing building coverage because no new structures are proposed. F. The proposed project is harmonious in scale and mass with the site, the natural terrain and other residences in the vicinity. Grading will be minor and required only to repair the slope failure of the property. 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. 784 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 two 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 ZC 784 0 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, including obtaining cooperation in a written form from adjacent property owners who are affected by the slope failure to enter their property for the repair purpose. D. The lot shall be developed and maintained in substantial conformance with the site plan on file marked Exhibit A and dated May 19, 2010, 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 substantially conform to the development plan approved with this application. The County Engineer may require minor changes, which shall be reported to City staff. 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 pertaining to easements. The duty of inquiry as to such requirements shall be upon the applicant. G. 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. H. Grading shall not exceed 3,920 square feet surface area, 133 cubic yards of cut and shall be balanced on site, unless approved by staff as a minor modification. The project shall be completed to County Engineer's requirements and satisfaction. I. The disturbed area of the lot, which includes the existing disturbed areas and the proposed slope repair area, shall not exceed 16,000 square feet or 40.0% of the net lot area in conformance with lot disturbance limitations. J. 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 ZC 784 • • 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. K. A drainage plan system shall be approved by the County Drainage 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. L. An Erosion Control Plan containing the elements set forth is Section 7010 of the 2007 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. M. Intensive geotechnical review and supervision shall be required throughout the time the project is ongoing. N. Two copies of landscape plan for the graded /repaired area shall be submitted for review by the Planning Department prior to the issuance of grading permit. Landscaping shall include water efficient low gallonage irrigation system that 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. Mitigation areas shall be planted with native plants at the following densities: (1) 1 to 2 gallon containers of non-flammable, low and relatively fast growing drought tolerant shrubs planted at approximately five feet (5') on center, (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 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. O. 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. There shall be no dumping of soil, construction material or any other debris into the canyon. P. 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. ZC 784 0 • Q. 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. R. 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. S. After construction, the property owner shall keep the drainage devices clear at all times of debris, soil, vegetation and any other materials. T. Should the repair activity be halted for any reason, (i.e. inclement weather), the property owner shall take appropriate measures, as determined by the Building Official, to minimize the seepage of any water into the area of slope failure. U. A detailed and final drainage plan as approved by the L.A.County Grading and Drainage Engineer shall be submitted to the City. V. Notwithstanding the above conditions, any modification to the plan dated May 18, 2010, as required by the applicants' soils engineer and LA County Public Works Department shall be reported to the Planning Commission by City staff. W. 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. X. All conditions of the Site Plan approval, that apply, shall be complied with prior to the issuance of a grading permit. Y. These conditions of approval shall be printed on all construction plans. Z. Any action challenging the final decision of the City made as a result of the public hearing on this application must be filed within the time limits set forth in Section 17.54.070 of the Rolling Hills Municipal Code and Code of Civil Procedure Section 1094.6. PASSED, APPROVED AND ADOPTED THIS 20TH DAY OF JULY 2010. LOREN DEROY, CHAIRPERSON ATTEST: HEIDI LUCE, DEPUTY CITY CLERK ZC 784 STATE OF CALIFORNIA ) COUNTY OF LOS ANGELES ) §§ CITY OF ROLLING HILLS ) I certify that the foregoing Resolution No. 2010-11 entitled: A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF ROLLING HILLS GRANTING A SITE PLAN REVIEW REQUEST TO PERMIT GRADING FOR SLOPE FAILURE REPAIR AT AN EXISTING SINGLE FAMILY RESIDENCE AT 2900 PALOS VERDES DRIVE NORTH (LOT 993-4-RH) AND PROPERTIES ADJACENT THERETO IN ZONING CASE NO. 784, (CARLEY). PROJECT HAS BEEN DETERMINED TO BE EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA). was approved and adopted at a regular meeting of the Planning Commission on July 20, 2010 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 784 DATE: TO: FROM: • • Caw opelliny INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 (310) 377.1521 FAX: (310) 377-7288 Agenda Item 4D on 6/15 field trip mtg Agenda Item 6F on 6/15 regular PC mtg JUNE 15, 2010 FIELD TRIP AND JUNE 15 REGULAR PC MEETING HONORABLE MEMBERS OF THE PLANNING COMMISSION YOLANTA SCHWARTZ, PLANNING DIRECTOR APPLICATION NO. SITE LOCATION: ZONING AND SIZE: APPLICANT: REPRESENTATIVE: PUBLISHED: REQUEST ZONING CASE NO. 784 2900 PALOS VERDES DRIVE N. (Lot 993-4-RH) RAS-1, 1.17 ACRES MR. AND MRS. JIM CARLEY DOUG McHATTIE, BOLTON ENGINEERING JUNE 3, 2010 Request for a Site Plan Review to permit grading of 133 cubic yards of cut and 78 cubic yards of fill of surficial grading over a 3,920 square foot surface area to repair slope failure at existing single family residential lots. 4 properties are affected by the slope failure. RECOMMENDATION It is recommended that the Planning Commission review the staff report, view the project during the field trip meeting, take public testimony and provide direction to staff. BACKGROUND 1. The applicant is requesting a Site Plan Review to permit grading of a 3,920 square foot area extending over four lots, which is subject to slope failure. All lots are developed with a single family residence and accessory structures and are occupied. 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 133 cubic yards of cut and 78 cubic yards of fill will be required, with the remaining cut being used for compaction. The purpose for the grading request is to stabilize the 1 tJ Printed on Recycled Paper • • * slope. The sites, after repair, will be returned in most part to their pre -landslide slope configuration, which in part exceed 2:1 slope. 2. Subject properties are located in the RA-S-1 Zone. The slope failure affects 2,582 square foot area on the applicants' property (2900 PV Dr. N.); 730 square foot surface area at 2910 PV Dr. N.; 390 square feet on 2950 PV Dr. N.; and 218 square feet on 2954 PV Dr. N. 3. The property developed fill slope failure and fissures and cracks appeared to the rear of the existing driveway after the winter rains. To expedite the process, the applicants conducted geological explorations and prepared soils, geology report and grading and drainage plans. This information was submitted to the County geology and soils division and building and safety department for plan check simultaneously with the application to the City for Site Plan Review. 4. The County geology and soils engineers reviewed the report and plans and provided corrections to the applicant. The applicants' engineers are working with the County to provide the requested explanations and corrections. The City's approval will be subject to meeting all of the LA County building and safety and soils and geology conditions. 5. As recommended by the geology and soils consultants, the project will entail removal of the loose landslide material and replace it with 90% compacted fill and engineered soil. A ten foot wide key at the toe of the failed area is proposed with subdrains. All new remedial fill will be keyed and benched into the existing competent soil material. The depth of excavation for the keyway will vary between 3-7 feet. No export or import of soil is anticipated at this time. However, depending on the soil condition to be determined during excavation, it may be necessary to augment some of the quantities of dirt. 6. The property is zoned RAS-1, and consists of 41,060 square feet of net lot area. The area affected by the proposed project will be 0.09 acres or 3,920 square feet, of which 2,582 is located on 2900 Palos Verdes Derive North (the applicant). The total disturbed area, including the existing house and all of the existing impervious areas, will be 16,600 square feet or 40.0% of the net lot area, which is at the maximum permitted. Pursuant to the City's regulations, remedial grading is considered disturbance and is included in the maximum disturbance calculations. Any additional grading or disturbance in the future on subject lot would require a Variance approval to exceed the 40% maximum disturbance allowed. 7. It will be required that the disturbed area be re -vegetated with native drought tolerant plants and shrubs and that landscaping plan be submitted to the City prior to grading. All four property owners will be required to agree to the planting plan and each will be responsible for the upkeep of the area on their respective properties. • • 8. The applicant's representative is working with County engineers to finalize the proposed grading and drainage plans. The slope failed into a natural drainage course. The flow line will be redesigned to County standards. 9. Prior to grading, the applicant will be required to submit to the City and County an "offsite grading covenant" from each property owner granting permission to do work on their property. 10. Together with other standard conditions, the Planning Commission could require that the following conditions be met: A. Stockpiles of soil, sand and similar materials shall be stabilized by being enclosed, covered, watered daily, or with application of non -toxic soil binders. 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. C. 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. D. 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 after the City determine that the re - vegetation and landscaping was installed pursuant to the landscape plan as approved, and that such landscaping is properly established and in good condition. E. An erosion control plan shall be prepared to minimize erosion and to protect slopes and channels to control storinwater pollution as required by the County of Los Angeles. SITE PLAN REVIEW CRITERIA 17 46.010 Purpose. The site plan review process is established to provide discretionary review of certain development projects in the City for the purposes of ensuring that the proposed project is consistent with the City's General Plan; incorporates environmentally and aesthetically sensitive grading practices; preserves existing mature vegetation; is compatible and consistent with the scale, massing and development pattern in the immediate project vicinity; and otherwise preserves and protects the health, safety and welfare of the citizens of Rolling Hills. • 17.46.050 Required findings. A. The Commission shall be required to make findings in acting to approve, conditionally approve, or deny a site plan review application. E. No project which requires site plan review approval shall be approved by. the Commission, or by the City Council on appeal, unless the following findings can be made: 1. The project complies with and is consistent with the goals and policies of the general plan and all requirements of the zoning ordinance; 2. The project substantially preserves the natural and undeveloped state of the lot by minimizing building coverage. Lot coverage requirements are regarded as maximums, and the actual amount of lot coverage permitted depends upon the existing buildable area of the lot; 3. The project is harmonious in scale and mass with the site, the natural terrain and surrounding residences; 4. The project preserves and integrates into the site design, to the greatest extent possible, existing topographic features of the site, including surrounding native vegetation, mature trees, drainage courses and land forms (such as hillsides and knolls); 5. Grading has been designed to follow natural contours of the site and to minimize the amount of grading required to create the building area; 6. Grading will not modify existing drainage channels nor redirect drainage flow, unless such flow is redirected into an existing drainage course; 7. The project preserves surrounding native vegetation and mature trees and supplements these elements with drought -tolerant landscaping which is compatible with and enhances the rural character of the community, and landscaping provides a buffer or transition area between private and public areas; 8. The project is sensitive and not detrimental to the convenient and safe movement of pedestrians and vehicles; and 9. The project conforms to the requirements of the California Environmental Quality Act. SOURCE: City of Rolling Hills Zoning Ordinance