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505A, Demo existing SFR & Guest hous, Studies & ReportsSOUTH BAY ENGINEERING COMPANY . • Civil Engineering -Surveying . • 304 Tejon Place . Palos Verdes Estates, CA 90274 . Telephone (310) 375-2556 b *** EARTHWORK REPORT *** DSK4:931725.VS0[21,1] JOB RUN BY: MCHATTIE DATE: August 19, 1994 JOB NAME: BLAZEVICH JOB #: 921725 DIGITIZED USING SCALE FACTOR OF 1 INCH = 20 FEET. ** AREA 1 - CUT - TENNIS COURT ELEVATION AREA (SF) VOLUME (CY) TOTAL VOLUME (CY) 1,102.00 1,100.00 1,098.00 1,096.00 2,076.49 2,688.59 2,870.33 3,493.22 176.48 205.89 235.69 AREA 1 TOTAL = 618.06 Cubic Yards CUT 176.48 382.37 618.06 ** AREA 2 - FILL - TENNIS COURT ELEVATION AREA (SF) VOLUME (CY) TOTAL VOLUME (CY) 1,100.00 1,100.00 1,098.00 1,098.00 1,096.00 233.94 90.57 1,199.36 478.96 259.80 0.00 47.78 0.00 27.36 AREA 2 TOTAL = 75.14 Cubic Yards FILL 0.00 47.78 47.78 75.14 • * * * TOTAL: AREAS 1 Through 2 618.06 Cubic Yards EXCAVATION. 75.14 Cubic Yards EMBANKMENT. 693.20 Cubic Yards • C1iy o/ RO/A Jh/'f • INCORPORATED JANUARY 24, 1957 NO. 2 PORTUGUESE BEND ROAD ROLLING HILLS, CALIF. 90274 ENVIRONMENTAL INFORMATION AND CHECKLIST FORM (310)377-1521 (INITIAL STUDY) FM: (310) 377-7288 CITY OF ROLLING HILLS PRELIMINARY DRAFT DATE: DECEMBER 22, 1993 APPLICANT: MR. JOHN Z. BLAZEVICH REPRESENTATIVE: MR. DOUGLAS MCHATTIE, SOUTH BAY ENGINEERING PROPERTY ADDRESS: 1 BUGGY WHIP DRIVE (LOT 176-A-MS AND A PORTION OF LOT 176-MS) ZONING AND AREA: RAS-2, 7.43 ACRES, IRREGULAR SHAPED LOT CASE NO.: ZONING CASE NO. 505 SUBJECT: REQUEST FOR A CONDITIONAL USE PERMIT FOR THE CONSTRUCTION AND RELOCATION OF A TENNIS COURT TO REPLACE. AN .EXISTING TENNIS COURT AND A REQUEST FOR SITE PLAN REVIEW FOR THE CONSTRUCTION OF A PROPOSED NEW SINGLE FAMILY RESIDENCE TO REPLACE AN EXISTING SINGLE FAMILY RESIDENCE. 33. Grading will be necessary for a portion of the site where recompaction will be required for fill soils existing on the property. ENVIRONMENTAL SETTING 38. The project site is a large 7.43 acre parcel consisting of undulating hillsides and knolls covered by grasses, and mature shrubs and trees, with some areas being heavily wooded. Currently, there is a large one-story single family residence with attached garage, a pool, tennis court and guest house on the lot. Landscaped lawns, shrubs and trees surround the existing residence, with native plants, grasses, shrubs, and trees beyond the residential area. Native birds and animals frequent the area such as sparrows, crows, raccoons, possum, skunks, gophers and an occasional fox. 39. The site is located within a one unit per 2-acre zone designation and is surrounded by similar development of the one- story ranch style with agricultural outbuildings. As described in Paragraph 38, native birds and animals frequent the area. The following analysis is a description of the findings contained in the Environmental Information and Checklist Form which preceded Printed on Recycled Paper. INITIAL REVIEW ZONING CASE NO. 505 PAGE 2 this page. A detailed discussion of all potential environmental impacts checked "Yes" or "Maybe" is provided, along with appropriate mitigation measures. ENVIRONMENTAL IMPACTS Item 40. Earth. a-d. Although approval of the project will not result in unstable earth conditions or in changes in geologic ubstructures, it should be noted that portions of the City exhibit unstable earth conditions, including active landslides and soil creep. The Land Use Element of the General Plan establishes a Landslide Hazard Overlay to carefully regulate development in unstable areas. This property is not within a mapped active landslide area. Grading, excessive irrigation, and/or increased septic tank discharge in unstable areas may trigger additional slope failure. Because the City is located in seismically active southern California, additional development will be exposed to potential groundshaking in the event of an earthquake. The Palos Verdes fault, considered potentially active, is located approximately one mile northeast of the City. Although approval of the project will result in disruptions, displacements, compaction, or overcrowding of the soil during construction, these will occur in order to prepare a 79,640 square foot building pad for the building site. A smaller building site currently exists. Any displacement and. recompaction of the soil will be required to conform with local ordinances and engineering practices requiring balanced cut and fill and should not cause a significant environmental impact. e-g. Also, during construction, there will be removal of natural vegetative cover, potentially causing an increase in soil erosion by wind action or storm runoff. This reduction of vegetative cover and the increased runoff associated with development may cause a slight increase in the soil deposition, siltation, or erosion in or near the ocean. As development is limited to one (1) single-family dwelling unit, related erosion impacts will be less than significant. Mitigation Measures 1. The applicant shall prepare and submit to the City a preliminary grading plan showing proposed drainage facilities, driveways, building pad(s), stable, corral, and blue line streams, for the lot at least 30 days prior to the Planning Commission hearing on the subdivision application. INITIAL REVIEW ZONING CASE NO. 505 PAGE 3 Item 41. Air a-c. The proposed project will not increase development but, will increase the size of development of a single-family dwelling unit. While increased development will generate slight increases in vehicle trips during and after construction and, objectionable odors during construction, the resultant impact on air quality will be less than significant. Item 42. Water a. Future development of the single residential unit on a two acre minimum parcel will not alter fresh or marine water currents. b. The proposed project may alter drainage patterns, increase surface runoff and reduce water absorption by the placement of structures, the introduction of impervious surface materials and irrigation systems. However, due to the nominal increase in development proposed and permitted by the General Plan, the impacts are not expected to be substantial. c. No major floodplains exist in the City. Flood waters generally flow through the canyon areas. The General Plan does not permit development in the canyons, and so changes in the course or flow of floodwaters is not anticipated. d. No water bodies are located in the project area. Future development in the project area is not expected to result in change in the amount of any water bodies located in the vicinity. e. The applicants propose a septic tank system for the project. As septic tank leach field effluent percolate into the watershed, some discharge into surface waters downstream may occur. The impact generated from a replacement of 1 dwelling unit, however, will be less than significant. i. No major floodplains exist in the City, and development is• not permitted in the canyon areas most likely to be affected by flooding. No open bodies of water occur within the City, thus no such hazard exists. The project is located high enough and far enough away from the ocean that tsunami hazards do not exist. j. Because the applicants propose a septic tank system, some discharge into surface waters downstream may occur. Item 43. Plant Life a-d. Any additional development within the City will reduce the amount of native vegetation which will be replaced, in some instances, by non-native species. But, due to the limited growth • • INITIAL REVIEW ZONING CASE NO.. 505 PAGE 4 proposed, this impact will be less than significant. In addition, the General Plan and Zoning Code set forth policies which encourage the retention and use of native drought tolerant vegetation in landscaping. No known rare and endangered species of plants exist in the City. Item 44. Animal Life a. As further development occurs in Rolling Hills, the natural habitat of the area will be slightly reduced. But, the impact bf the current proposal is expected to be less than significant. b. Large lot, estate density development proposed for this project provides the opportunity to retain substantial amounts of existing habitat. The only animal listed by the Federal Government is the Palos Verdes Blue, a butterfly which was last seen in the Rolling Hills area in May, 1986. Several other animals do occur, however, that are considered as candidates for protection by either the Federal Government or the State Government. The Tiger Beetle, while not considered to be endangered or threatened, does maintain a sensitivity to humans, exists to an extent that may be cause for concern. Recently, the California gnatcatcher was added to the list of endangered species and, in a recent census, one pair of gnatcatchers were located at the southern tip of the City adjacent to the City of Rancho Palos Verdes. The impact of the proposed future development will be less than significant. Item 46. Light and Glare Residential building materials are carefully regulated by the Zoning Ordinance and the Community Association. Buildings are limited to one story in height. Light and glare impacts are therefore expected to be less than significant. Item 52. Transportation/Circulation a. Buggy Whip Drive is a short, winding private road that will not require widening. The incremental increase of one larger dwelling unit will not generate more than an estimated 10 daily vehicle trips. This is considered less than significant. Item 59. Cultural Resources a. While prior tilling and dry farming practices may have disrupted potential remains, grading prior to construction may uncover a cultural resource. • • INITIAL REVIEW ZONING CASE NO. 505 PAGE 5 Mitigation Measures 2. In the event that subsurface material of an archaeological, paleontological or other cultural resource is encountered during project grading or development, all grading and construction shall cease in the immediate area, and the find shall be left untouched until a qualified professional archaeologist or paleontologist, whichever is appropriate, is contacted and called in to evaluate the find and makes recommendations as to disposition, mitigation or salvage. The developer shall incur the cost of such professional investigation. The developer shall comply with the mitigation measures recommended and approved by the City for the disposition, mitigation or salvage of such material. On the basis of this initial evaluation: (check one) I find the proposed project COULD NOT have a significant effect on the environment, and a NEGATIVE. DECLARATION will be prepared. X I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because the mitigation measures described on an attached sheet have been added to the project. A NEGATIVE DECLARATION will be prepared. I find the project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required. Date December 22, 1993 LOLA M. UNGAR For the City of Rolling Hills (Lead Agency) • ENITIAL REVIEW ZONING CASE NO. 505A PAGE 6 Item 46. Light and Glare Residential building materials are carefully regulated by Zoning Ordinance and the Community Association. Buildings are limited to one story in height. Light and glare impacts therefore expected to be less than significant. Item 52. Transportation/Circulation a. Buggy Whip Drive is a short, winding private road that will not require widening. The incremental increase of one larger dwelling unit will not generate more than an estimated 10 daily vehicle trips. This is considered less than significant. Item 59. Cultural Resources a. While prior tilling and dry farming disrupted potential remains, grading prior to construction may uncover a cultural resource. Mitigation Measures 2. In the event that subsurface material of an archaeological, paleontological or other cultural resource is encountered during project grading or development, all grading and construction shall cease in the immediate area, and the find shall be left untouched until a qualified professional archaeologist or paleontologist, whichever is appropriate, is contacted and called in to evaluate the find and makes recommendations as to disposition, mitigation or salvage. The developer shall incur the cost of such professional investigation. The developer shall comply with the mitigation measures recommended and approved by the City for the disposition, mitigation or salvage of such material. 000 INITIAL REVIEW ZONING CASE NO. 505A PAGE 5 j• No major floodplains exist in the City, and development is not permitted in the canyon areas most likely to be affected by flooding. No open bodies of watei`occur within the City, thus no such hazard exists. The project is located high e • ugh and far enough away from the ocean that tsunami hazards do not exist. Because the . • plicants propose a septic tank system, some discharge into surface waters • ownstream may occur. Item 43. Plant Life a-d. Any additional deve native vegetation whic species. But, due to the li significant. In addition, the which encourage the retentio in landscaping. No known rar City. Item 44. Animal Life pment withir►� the City will reduce the amount of will be replaced, in some instances, by non-native ited grwth proposed, this impact will be less than Gen ral Plan and Zoning Code set forth policies and use of native drought tolerant vegetation and endangered species of plants exist in the a. As further development' occurs in Rol g Hills, the natural habitat of the area will be slightly reduced. But, the ' pact of the current proposal is expected to be less than significant. b. Largety lot,- estate der,{si development propose • for this project provides the opportunity to regain substantial amounts o existing habitat. The only animal listed by t e Federal Government is the Pa oos Verdes Blue, a butterfly which had not be seen in the Rolling Hills area since May, 1986. In 1994, the Palos Verdes Bl a was seen at the nearby San Pedro Fuel Depot Station. Several other animals do occur, however, that are considered as candidates for protection by either the Federal Government or the State Government. Recently, the California gnatcatcher was added to the list of endangered species and, in a recent census, pairs were located in the adjacent City of Rancho Palos Verdes. Other target species for the Rancho Palos Verdes Peninsula Area that are being studied by the State of California Department of Fish and Game are the Cactus Wren and the Coast Horned Lizard. The impact of the proposed future development of a large single family residence will be less than significant. (August 9, 1994). s • INITIAL REVIEW ZONING CASE NO. 505A PAGE 7 On the basis of this initial evaluation: (check one) I find the proposed project COULD NOT have a significant effect on the environment, and a NEGATIVE DECLARATION will be prepared. X I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because the mitigation. measures described on an attached sheet have been added to the project. A NEGATIVE DECLARATION has been prepared. I find the project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required. Date Aug. 9. 1994 & Dec. 22, 1993 r� By. { 1, LOLA M. UNGAR, PRIIV YPAL PLANNER For the City of Rolling Hills (Lead Aeencyl