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Home My WebLink AboutMS 16-06; CARLSBAD VILLAGE LOFTS; SHORING PLAN REVIEW; 2019-10-01NN 0 I RECORD COPY I't 3 1 ID/taft, Construction Testing & Engineering nCinitial Date Inspection I Testing I Geotechnical I Environmental & Construction Engineering I Civil Engineering I Surveying October 1, 2019 CTE Job No. 10-14798G Wermers Properties Attn: Austin Wermers 5080 Shoreham Place, Suite 105 San Diego California 92122 (858) 623-4958 Via Email: AustinW(wermerscompanies.com Subject: Shoring Plan Review Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California References: At end of document Mr. Wermers: As requested, Construction Testing and Engineering, Inc. (CTE) has reviewed the referenced shoring plans for conformance with our recommendations in the referenced geotechnical documents. Based on our review, the plans appear to be in substantial conformance with our recommendations and no exceptions were noted. Please note that the active and at-rest soil pressures for permanent walls recommended in CTE's referenced report (CTE, 2016) are considered still applicable and appropriate to the project conditions, as well as the 30 percent reduction in values for temporary walls and traffic surcharge described in Section 5.7.2 on that report. Additionally, an equivalent fluid pressure of 60 pcf may be used for wall backfill (permanent or temporary) for minor backfill slopes constructed at a 1.5:1 (H:V)ratio. This letter is subject to the same limitations as previous CTE geotechnical documents issued for the subject project. CTE's conclusions and recommendations are based on an analysis of the observed conditions. If conditions different from those described in the reports are encountered during construction, this office should be notified and additional recommendations, if required, will be provided. 1441 Montiel Road, Suite 115 1 Escondido, CA 92026 1 Ph (760) 746-4955 1 Fax (760) 746-9806 1 www.cte-inc.net Shoring Plan Review Page 2 Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California October 1, 2019 CTE Job No. 10-14798G The opportunity to be of service on this project is appreciated. If you have any questions regarding this report, please do not hesitate to contact the undersigned. Respectfully submitted, CONSTRUCTION TESTING & ENGINEERING, INC. T. cc CERTIFIED A ENGINEERING a No.2665 :r. GEOLOGIST EXPA2/31/20 Exp. 5/31/19 A.c Dan T. Math, GE# 2665 eOFC Jay F. Lynch, CEG #1890 Vice President, Principal Principal Engineering Geologist I Colin J. Kenny, RCE #84406 Senior Engineer CJKIJFLIDTM o No.84406 -( E rr X P. 9/30/19 %P CIVIL \tI- \\Esc_server\projecls\10-I4000 to 10-14999 Projects\I0-14798G\Ltr_Plan Review - Shoring 10-I-I9.doc I I Shoring Plan Review Page 3 Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California October 1, 2019 CTE Job No. 10-14798G References: Precise Grading Plans for Carlsbad Village Lofts (Sheets 1-17) (Includes Grading Plans Sheets 1-9 & Shoring Plans, Sheets 10-17) Sheets 1-9 Prepared by SB&O, Inc., Sheets 10-17 Prepared by Shoring Design Group Plans Dated August 16, 2019 Updated Preliminary Geotechnical Recommendations and Grading Plan Review Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California CTE Job No. 10-14798G, dated February 28, 2019 Geotechnical Investigation Proposed Carlsbad Village Drive Apartments 1044 Carlsbad Village Dive Carlsbad, California CTE Job No. 10-12371G, dated January 27, 2016 \\Esc_server\projects\10-14000 to 10-14999 Projects\10-14798G\Ltr_Plan Review- Shoring 10-1- 19.doc I LX "ECORil copy E C17 INC PJL Construction Testing & Engineering, I 1uitial Date Inspection I Testing I Geotechnical I Environmental & Construction Engineering j Civil Engineering I Surveying October 1, 2019 CTE Job No. 10-14798G Wermers Properties Attn: Austin Wermers 5080 Shoreham Place, Suite 105 San Diego California 92122 (858) 623-4958 Via Email: AustinW@wermerscompanies.com Subject: Second Response the City of Carlsbad Review Redline Comments Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California References: At end of document Mr. Wermers: As requested, Construction Testing and Engineering, Inc. (CTE) provides responses herein to the subject comments received from the City of Carlsbad. The comments were provided as handwritten "redlines" on paper documents and request geotechnical recommendations for the proposed Emergency Vehicle Access (EVA) road on the east side of the site. The proposed EVA road is to consist of a central section of decomposed granite (DG) overlaying aggregate base, and bounded on either side by Grasspave2 Flexible Plastice Porous Pavement (Grasspave2). Per the manufacturer's specification sheet (provided herewith), Grasspave2 measures one inch in thickness. Based on anticipated traffic loading and subgrade conditions, CTE provides recommendations for the EVA road below, which are considered adequate for infrequent emergency vehicle access (up to a 75,000 pound fire truck): - Areas utilizing Grasspave2 should be underlain by a minimum of ten inches of Caltrans "Class 2 permeable aggregate base, resulting in an 11 inch section. - / In areas utilizing DG, the DG should be a maximum of six inches in thickness and underlain by enough Caltrans Class 2 permeable aggregate base to create a section a minimum of 11 inches in thickness (e.g., six inches of DG should be underlain by a minimum of five inches of base, four inches of DG should be underlain by a minimum of seven inches of base, etc.). - The upper 12 inches of subgrade soil should be compacted to a minimum relative density of 95 percent. 1441 Montiel Road, Suite 115 1 Escondido, CA 92026 I Ph(760)746-4955 I Fax(760)746-9806,1 www.cte-inc.net . . Second Response the City of Carlsbad Review Redline Comments Page 2 Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California October 1, 2019 CTE Job No. 10-14798G - /An approved impermeable liner should be installed between the subgrade soil and base layer, and should extend vertically up the sides of the overall pavement section. The liner and subgrade soil should be sloped a minimum of one percent away from the proposed structure. - /A suitable subdrain (see Detail 13 on Plan Sheet 3) should be installed at the downslope end of the proposed pavement section (i.e., end furthest from the building). In areas where a retaining wall abuts the pavement section (e.g., Detail E3) a second subdrain should be installed behind the retaining per Detail 13. Subdrains should outlet to an appropriate location as determined by the structural engineer. - The proposed retaining wall shown in Detail 13 on Plan Sheet 3, as well as on Plan Sheet 8, appears to be less than six feet tall. Therefore, seismic analysis is not considered necessary, per the CBC. This letter is subject to the same limitations as previous CTE geotechnical documents issued for the subject project. CTE's conclusions and recommendations are based on an analysis of the observed conditions. If conditions different from those described in the reports are encountered during construction, this office should be notified and additional recommendations, if required, will be provided. The opportunity to be of service on this project is appreciated. If you have any questions regarding this report, please do not hesitate to contact the undersigned. Respectfully submitted, CONSTRUCTION TESTING & ENGINEERING, INC. Az Dan T. Math, GE# 2665 .Jay F. Lynch, CEG #1890 Principal Geotechnical Engineer OF cM.'° Principal Engineering Geologist 0FESS No.84406 zrn Cohn J. Kenny, RCE #84406 EXP. 9/30/19 Senior Engineer * '> CJKIJFL/DTM OF CM.-\ 41 of' No.1890 C)\_ ER11F1ED U ENGINEERING ) * GEOLOGIST OF C \\Esc_server\projects\10.14000 to 10-14999 Projects\tO-t4798G\Ltr_Response to Comments 10-1-19 City of Carlsbad Redtinesdoc . . Second Response to City of Carlsbad Comments dated April 8, 2019 Page 3 Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California October 1, 2019 CTE Job No. 10-14798G REFERENCES: City of Carlsbad Redline Comments on Precise Grading Plans for Carlsbad Village Lofts (Sheets 1-17) (Includes Grading Plans Sheets 1-9 & Shoring Plans, Sheets 10-17) Sheets 1-9 Prepared by SB&O, Inc., Sheets 10-17 Prepared by Shoring Design Group Plans Dated August* 16, 2019 Response the City of Carlsbad Review Redline Comments Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California CTE Job No. 10-14798G, dated August 19, 2019 Updated Preliminary Geotechnical Recommendations - Addendum 01 Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California CTE Job No. 10-14798G, dated March 31, 2019 Response the City of Carlsbad Review Comment Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California CTE Job No. 10-14798G, dated March 22, 2019 Updated Preliminary Geotechnical Recommendations and Grading Plan Review Proposed Carlsbad Village Lofts 1044 Carlsbad Village Drive (APNs: 203-320-3200, -3900, & -4700) Carlsbad, California CTE Job No. 10-14798G, dated February 28, 2019 Geotechnical Investigation Proposed Carlsbad Village Drive Apartments 1044 Carlsbad Village Dive Carlsbad, California CTE Job No. 10-12371G, dated January 27, 2016 \\Esc_server\projects\10- 14000 to 10-14999 Projects\10- 14798G\Ltr_Response to Comments 10-1-19 City of Carlsbad Redlinesdoc