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Home My WebLink AboutCDP 15-26; 4390 Yuki Lane; ADDENDUM NO 1 UPDATED GEOTECHNICAL REPORT ADDENDUM 2 ADDENDUM 3; 2016-06-13ENGINEERING DESIGN GROUP -- 2121 Montiel Road, San Marcos, California 92069 • (760) 839-7302 • Fax: (760) 480-7477 • www.designgroupca.com Date: June 13, 2016 To: Re: Pacific Beach 2014, Ltd. c/o San Dieguito Development Attn: Ted Montag 1106 Second St PMB 255 Encinitas, CA 92024 p: 760.635.7633 e: tedmontag3@msn.com JUI~ 1 5 2016 Proposed new residence to be located at Lot 1 Yuki Lane, Carlsbad, California Subject: Addendum No. 3 CDP 15-26 -4390 Yuki Lane Ref: 1. Addendum No.2-dated 4-14-16, prepared by Engineering Design Group. 2. Addendum No. 1 -Updated Geotechnical Report, prepared by Engineering Design Group, dated January 30, 2015. 3. "Updated Geotechnical Recommendations, Proposed New Single Family Residence to be located at Lot 1, Yuki Lane, Carlsbad, California," prepared by Engineering Design Group, dated September 3, 2015. At the request of the City of Carlsbad we provide the following recommendations with respect to the installation of pervious concrete driveways at the above referenced site. 1. Specific constraints and details of pervious concrete in driveway area should be per the specific manufacturer and pervious pavement industry standards and recommendations, including edge restraints, minimum bedding specifications, base and subgrade requirements, installation tolerances, drainage, etc. 2. As pervious concrete relates to the geotechnical aspects of the project we provide the following recommendations: NEW RESIDENCE a. We recommend subgrade be compacted to 95% minimum compaction in the area of new pervious concrete driveways. b. Where runoff and stormwater is directed over permeable pavement and water is anticipated to flow through into an aggregate base, sub-drains and/or underdrains to be installed. Construction detailing to be reviewed prior to installation. c. The specific recommendations of the pervious pavement manufacturer may supersede the recommendations herein. Specific manufacturer recommendations shall be included in any pervious concrete detailing. 4930 Yuki Lane, Carlsbad, California Page No.1 Job No. 155513-1 ENGINEERING DESIGN GROUP GEOTECHNICAL, CIVIL, STRUCTURAL CONSULTANTS d. All other recommendations regarding biofiltration, per References 2 & 3 above, shall be adhered. If you have any questions with respect to this addendum, please do not hesitate to call our office. Respectfully Submitted, ENGINEERING DESIGN GROUP Steven Norris California GE #2590 Erin Rist Calfironia RCE 65122 NEW RESIDENCE 4930 Yuki Lane, Carlsbad, California ENGINEERING DESIGN GROUP GEOTECHNICAL. CIVIL. STRUCTURAL CONSULTANTS Page No.2 Job No. 155513-1 G!NBERING DESIGN GROUP --------------------------------2121 Montiel Road, San Marcos, California 92069 • (760) 839-7302 • Fax: (760) 480-7477 • www.designgroupca.com Date: January 29, 2016 To: Re: Pacific Beach 2014, Ltd. c/o San Dieguito Development Attn: Ted Montag 11 06 Second St PMB 255 Encinitas, CA 92024 p: 760.635.7633 e: tedmontag3@msn.com JUN 15 Proposed new residence to be located at Lot 1 Yuki Lane, Carlsbad, California Subject: Addendum No. 1 -Updated Geotechnical Report COP 15-26-4390 Yuki Lane Ref: 1. "Updat m ommendations , Proposed New Single Family Residence to be at Lot 1, Yuki Lane, rlsbad, California," prepared by Engineering Design Group, dated Sept ber 3, 2015. 2. City Co -4930 Yuki Lane, dated September 30, 2015. 3. Redline comments on BMP plan, Yuki Lane Lot 1. We have provided the following addendum in response to the City of Carlsbad Comments. 1. In the area along the north side of the house where the paved walkway provides a 2.5 feet horizontal distance to the localized low spot for drainage we recommend the area maintain sufficient distance below finish floors, minimize pervious surfaces and provide for sufficient drainage devices to not allow runoff to pond adjacent to new foundations and improvements. 2. We conducted slope stability analysis of the ascending slope along the north property line that extends approximately 20 feet above the proposed building pad. Our analysis indicates that global slope stability for the slope modeled with the wall along the toe has a factor of safety of greater than 1.1 for the pseudo static condition and greater than 1.5 for the static condition. As part of our analysis we also conducted a surficial slope analysis utilizing the infinite slope equation. Based upon our experience with similar type steep slopes a cohesion value of 300 psf was utilized for surficial slope analysis and factor of safety greater than 1.5. Surficial weathering, rilling and block failures are anticipated and a freeboard of 7 feet above the top of wall should be constructed. We anticipate additional wall height extending 2 feet above the proposed 3 feet retained height with a fence that extends an additional 5 feet (7 feet total), designed for a NEW RESIDENCE 4930 Yuki lane, Carlsbad, California ENGINEERING DESIGN GROUP GEOTECHNICAL, CIVIL, STRUCTURAL CONSULTANTS Page No.1 Job No. 155513-1 temporary impact load. The retaining wall shall be detailed with sufficient drainage facilities to not allow water to pond behind the wall. 3. Regarding redlined comments on the BMP plan, we recommend the following: a. Our original report recommends lined BMPs in the proximity of the residence. Where the BMP is to be located within 8 horizontal feet or the uppermost elevation of water within the bioretention area is less than 12 inches of the residence finish floor, the BMP shall be lined or the slab shall be waterproofed. b. On Lot 1 it appears the bioretention area is proposed approximately at the top of the graded slope between Lots 1 &2. As the building on the lower building pad is proposing to encroach into the slope and saturation can result in shallow slope failure. We recommend the bioretention area be lined or moved away from the top of slope a minimum horizontal distance equivalent to the height of the slope. If you have any questions with respect to this letter please do not hesitate to call our office. Respec;tfully Submitted, ENGINEERING DESIGN GROUP Steven Norris Califomia GE #2590 NEW RESIDENCE 4930 Yuki Lane, carlsbad, California ENGINEERING DESIGN GROUP GEOTECHNICAL, CIVIL, STRUCTURAL CONSULTANTS Page No.2 Job No.155513-1 ENGINEEI<JNG DESIGN CiROUP ·----· --··-~ --- 2121 Montiel Road, San Marcos, California 92069 • (760) 839-7302 • Fax: (760) 480-7477 • www.designgroupca.com Date: April14, 2016 To: Re: Pacific Beach 2014, Ltd. c/o San Dieguito Development Attn: Ted Montag 1106 Second St PMB 255 Encinitas, CA 92024 p: 760.635.7633 e: tedmontag3@msn.com JUN 15 ZOi6 Proposed new residence to be located at Lot 1 Yuki Lane, Carlsbad, California Subject: Addendum No. 2 COP 15-26 -4390 Yuki Lane Ref: 1. Addendum No. 1 -Updated Geotechnical Report, prepared by Engineering Design Group, dated January 30, 2015. 2. "Updated Geotechnical Recommendations, Proposed New Single Family Residence to be located at Lot 1, Yuki Lane, Carlsbad, California," prepared by Engineering Design Group, dated September 3, 2015. We have provided the following addendum with regard to City comments. 1. Specific constraints and details of pavers in driveway area should be per the specific manufacturer minimum recommendations, including edge restraints, minimum bedding specifications, base and subgrade requirements, installation tolerances, drainage, etc. 2. As pavers relate to the geotechnical aspects of the project we provide the following recommendations: NEW RESIDENCE a. We recommend intermediate restraints shall be installed horizontally a maximum of every 10 linear feet. Intermediate restraints shall be concrete, at least 12 inches wide and extend at least 6 inches below base/subbase material, reinforced with two No. 4 bars top and bottom. b. We recommend subgrade be compacted to 95% minimum compaction in the area of new pavers. c. Where runoff and stormwater is directed over permeable pavements and water is anticipated to flow through pavers into an aggregate base, sub-drains/drainage mats shall be detailed to allow runoff to outlet. d. The specific recommendations of the concrete block manufacturer or the ICPI may supersede the recommendations herein. Specific manufacturer recommendations shall 4930 Yuki Lane, Carlsbad, California Page No.1 Job No. 155513-1 ENGINEERING DESIGN GROUP GEOTECHNICAL. CIVIL, STRUCTURAL CONSULTANTS be included in any paver detailing. 3. The 2 foot of additional debris wall above the retained height shall be designed as an equivalent fluid pressure of 125 pcf applied as an inverted triangle at a distance of (2/3)H from the base of the wall debris portion of the wall. 4. Debris fences shall be designed for minimum lateral loads as determined by building code, and at a minimum include galvanized 3 inch diameter steel posts at 5 feet on center, filled with mortar and embedded a minimum of 3 feet into minimum 12 inch wide wall/foundation. Fencing fabric, per architect, should allow for a drained condition with a minimum of 2 inch mesh, 9 gage wire, placed on the slope side of the posts. If you have any questions with respect to this addendum please do not hesitate to call our office. Respectfully Submitted, ENGINEERING DESIGN GROUP Steven Norris California GE #2590 NEW RESIDENCE 4930 Yuki Lane, Carlsbad, California ENGINEERING DESIGN GROUP GEOTECHNICAL. CIVIL, STRUCTURAL CONSULTANTS Page No.2 Job No. 155513-1