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HomeMy WebLinkAboutMS 2020-0004; ADAMS STREET HOMES; FOUNDATIONS CLOSE TO INFILTRATION BMP'S FOR PROPOSED ADAMS STREET HOMES; 2021-08-26Geotechnical Exploration, Inc. SOIL AND FOUNDATION ENGINEERING • GROUNDWATER • ENGINEERING GEOLOGY 26 August 2021 RINCON REAL ESTATE GROUP 5315 Avenida Encinas, Suite 200 Carlsbad, CA 92008 Attn: Mr. Kevin Dunn lob No. 20-12852 Subject: Clarification of Recommendation for Foundations Close to Water Infiltration BMP Ponds Adams Street Homes 3745 Adams Street Carlsbad, California Dear Mr. Dunn: In accordance with the request of Mr. Bryan Knapp with PLSA, and as required by the City of Carlsbad grading plan reviewer, we are issuing this letter to clarify our minimum recommendations for foundations within 10 feet of planned water infiltration BMP ponds. Refer to our letter dated February 8, 2021, for initial recommendations for foundations and utility lines to be built within 10 feet of BMP ponds. Herein, we clarify that when we refer to the bottom elevation of the BMP ponds adjacent to or near retaining wall or home foundations, we are referring to the surface elevation inside the ponds. Therefore, for a retaining wall near BMP 2, the wall foundation top may be left at an elevation of 85 feet. The findings, opinions, and conclusions presented herein have been made in accordance with generally accepted principles and practice in the field of geotechnical engineering within the City of Carlsbad. No warranty, either expressed or implied, is made. Our findings, opinions and conclusions are specifically limited to the scope of services described herein. for the evaluation and feasibility of storm water infiltration BMPs. When final project plans are completed, they should be made available for our review. Additional or modified recommendations may be provided as warranted. 7420 TRADE STREET• SAN DIEGO, CA. 92121 • (858) 549-7222 • FAX: (858) 549-1604 • EMAIL: geotech@gei-sd.com Adams Street Homes Carlsbad, California Job No. 20-12852 Page 2 This opportunity to be of continued service is sincerely appreciated. Should you have any questions, please do not hesitate to contact us. Reference to our Job No. 20- 12852 will expedite a response to your inquires. Respectfully submitted, • I I I Senior Geotechnical Engineer Ce 1e D. Reed, President C.E.G. 999/P.G. 3391