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103-B. Director's Minor Modification DIR-2010-30 dated 9/23/10.pdfa a _ r:_ _ _.... 1` CITY OF CUPERTINO 10300 Torre Avenue, Cupertino, California 95014 (408) 777-3308 To: Mayor and City Council Members Chairperson and Planning Commissioners From: Aarti Shrivastava, Director of Community Developmen Prepared by: Piu Ghosh Date: September 23, 2010 Subject: Director's Minor Modification, DIR-2010-30, to allow paving in the front yard of an existing duplex for the purpose of a parking space. Chapter 19.132 of the Cupertino Municipal Code allows for administrative approval of minor changes in a project. The Director reports his decision to the City Council and Planning Commission in time to allow an appeal of the decision within fourteen calendar days. DISCUSSION The project is located in a P(R2) - Planned Development Duplex zoning district. According to Chapter 19.48 of the Municipal Code, any modifications to the project site would require an approval from the Director of Community Development with a Director's Minor Modification. The applicant is proposing to resurface approximately 187 square feet of existing turf in the front yard setback area with pervious stone pavers for parking purposes (see Attachment 1 - Plan set). IEWHOK11 The Director of Community Development deems the modification minor and approves the plan set (Pages 1-4) with the following conditions of approval: 1. PAVING MATERIALS The paving materials for the proposed parking space shall be permeable pavers on an aggregate base as shown on the plans. This approval of the modification is effective September 23, 2010, The fourteen calendar day appeal period will expire on October 7, 2010. Enclosures: Attachment 1: Plan Set �'cupertinosan 1 groups 1 Planning y PDREPORT! DIRreporfs � 2010, D1R-2010-30. docx 842 Miller Ave - Google Maps Page 1 of 1 d I 2n� a �!(e http://maps.google.com/maps?hl=en&q=967+miller+95014&ie=UTF8&hq= &hnear=967+.._ 8/22/2010 1. Excavate to the proper design depth (see diagram at top right*). Remove all surplus unsuitable sub -base material. Compact the area which has been cleared. Then spread and compact the area with Class It 3/4" minus aggregate for base material. The depth of the base should be 3 to 12 inches, depending on anticipated traffic, native soil conditions or as otherwise directed by Site Engineer, Architect or Landscape Architect. Compact base in lifts to 95% proctor density, Installation Tip: Calstone recommends a minimum of 6 to 8 inches of compacted base in residential vehicular conditions. 3 to 4 inches in pedestrian only areas. 2. Spread concrete sand evenly over the base and screed to a uniform depth of 1 to 1 1/2 inches up to t he edge. (Edge restraints can be of various types, e.g, PVC (Snap Edge/PaveEdge), concrete, wood, aluminum, etc.). The screeded sand should not be pre -compacted. 3. Install the Paving Stones hand tight in the desired pattern 1/4 inches to 3/8 inches above final grade. The joints between the units should be approximately 1/16 to 1/8 inches wide. Most pavers are made with spacer bars to create a minimum joint width. These spacer bars will provide the minimum joint necessary for sand to enter. 4. Cut the Paving Stones when required with a paver splitter or saw to fit accurately and neatly. Installation Tip: When saw cutting, be careful to not allow cutting residue (wet or dry) to land on the pavers. The residue will permanently dull the appearance of the paving stones. This type of staining is extremely, if not impossible to remove. Saw cut pavers should be rinsed thoroughly before placing them into the laying field. 5. Once an area is installed, compact the pavers 2-3 passes into the bedding sand with a plate vibrator. This piece of equipment should be capable of 3000 to 5000 lbs. centrifugal compaction force, and operate at a frequency of 80 to 90 hertz. Concrete Pavers Sand Joint Concrete Plastic Edging Metal Pin 1 Concrete Pavers *Design Depth \1r 23 t ALSan 3-12" O Base Sand d. Base Material Soil Sub Base Installation Tip: One of the most attractive features of a Calstone paving stone is the elegant finish achieved through the Duraface process. Care should be taken to preserve this finish during installation. Most vibratory plate manufacturers offer impact pads designed specifically for paving stone installations. If this is not available, the installer should use some other form of intermediate media such as thin plywood, carpet, cardboard, landscape fabric, etc. This added protection is not necessary in our River Rock and Quarry Stone product lines. 6. Then sweep a dry sand over the, pavers and into the joints. Make 4-5 passes with the plate vibrator across the surface or until the joints are full of sand. 7. Sweep off excess sand and wash down completed project. The paver surface is now ready for use. If using polymeric joint sand, read and follow manufacturer's directions.