The URL can be used to link to this page

Home My WebLink AboutResponse to Third Party Geotechnical Review (SECOND) Proposed Eco-Friendly Auto Spa' Q ~ > -~ l,. ~ ~ Construction Testing & Engineering, Inc. Inspection I Testing I Geotechnical I Environmental & Construction Engineering I Civil Engineering I Surveying August 23, 2019 Toyota Carlsbad Attention: Ms. Peggy Keleher 5424 Paseo Del Norte Carlsbad, California 92008 Telephone: (858) 679-1185 RECORD C Oltl'ProjtktNo. 10-13214T I Q~fL/Mi.• 't,, r,2;:> Initia I Date Via Email: pkelcher@toyotacarlsbad.com Subject: Response to Third-Party Geotechnical Review (Second) Proposed Eco-Friendly Auto Spa 6010 A venida Encinas Carlsbad, California Project No: 8838.1, Log No. 20536 Dated June 17, 2019 I-Re:fgences: Construction Testing and Engineering, Inc, 2017, Percolation Test Results for Proposed Biofiltration Basins, Proposed Carlsbad Car Wash, 6010 Avenida Encinas, Carlsbad, California, Job No. 10-13214T, dated June I. w (.9 ~z ,..,""> Q__ = 0~ r-,.., •• .J w "'""' dJ UJ .-1 (_. .> z u-u.J bc.9 Q oz zw <( _J Ms. Keleher: Construction Testing and Engineering, Inc, 2016, Geotechnical Investigation, Proposed Carlsbad Toyota Car Wash, 6010 Avenida Encinas, Carlsbad, California, Job No. 10-13214T, dated September 16. Construction Testing and Engineering, Inc, 2019, Grading Plans For: Eco- Friendly Auto Spa, 6 Sheets, 6010 A venida Encinas, Carlsbad CA, 92011, GR2019-001 l, Project No. CPD2017-0049, CUP2017-0009, Drawing No. 517- 2A. Presented herein is our response to the City of Carlsbad's review of the Geotechnical Investigation report dated September 16, 2016. Issue No. 1: Due to the age of the "Geotechnical Investigation ... " (Reference 1), the consultant should provide an update geotechnical report addressing the plans and providing update grading and foundation recommendations consistent with the 2016 California Building Code. Response to Issue No. 1: CTE has reviewed the referenced geotechnical report and available project plans for the site and has evaluated site conditions reported therein. Based on review of the report and condition of the site, the information provided remains applicable and is considered to be consistent with recommendations of the 2016 California Building Code. Issue No. 2: The Consultant should review the project foundation plans, provide any additional geotechnical analysis/recommendations considered necessary, and confirm that the plans have 1441 Montiel Road, Suite 115 I Escondido, CA 92026 I Ph (760) 746-4955 I Fax (760) 746-9806 I www.cte-inc.net Response to Third-Party Geotechnical Review Comments Proposed Eco-Friendly Auto Spa 6010 Avenida Encinas, California August 23, 2019 been prepared in accordance with the geotechnical recommendations. Page2 CTE Job No.: 10-13214T Response to Issue No. 2: CTE has not yet been provided with project foundation plans for review. The structural plans will be reviewed when they become available. Issue No. 3: The consultant should provide an update geotechnical map utilizing the current grading plan for the project to clearly show (at a minimum) a) existing site topography, b) proposed structures/improvements, c) proposed finished grades, d) geologic conditions, e) locations of the subsurface exploration, t) temporary construction slopes, g) remedial grading, etc. Response to Issue No. 3: The Geologic/Exploration Location Map (Figure 2) is attached. Issue No. 4: The Consultant should describe suitable/competent material for support of compacted fill. Response to Issue No. 4: Suitable/competent material is to consist of either medium dense to dense native Old Paralic Deposits or existing fill, devoid of deleterious material, that meets minimum compaction requirements as specified in the referenced geotechnical report. Suitability of exposed soil conditions is to be evaluated by the geotechnical representative during grading and construction. Issue No. 5: Foundation and slab design criteria for expansive soils should be consistent with Section 1808.6 of the 2016 California Building Code. The Consultant should confirm that the foundation and slab recommendations are consistent with Section 1808.6 or update the foundation and slab recommendations, as necessary. Response to Issue No. 5: The foundation and slab recommendations presented in the ·referenced report are consistent with Section 1808.6 of the 2016 California Building Code. Issue No. 6: The Consultant should address impacts to adjacent property and improvements as a result of site grading and construction. Response to Issue No. 6: For overexcavations that encroach upon property lines or adjacent structures, the temporary construction excavation should be sloped at a 1: 1 (horizontal to vertical) or flatter gradient down to the prescribed overexcavation depth. Depending upon proximity and observation of actual exposed conditions, overexcavation in slots may be recommended by the geotechnical engineer during grading. If the recommendations provided herein and in the referenced geotechnical report are implemented during grading, it is not anticipated that adjacent properties will be impacted by the proposed construction activities. Issue No. 7: The Consultant should provide a list of recommended geotechnical testing/observations during grading and construction. Response to Issue No. 7: CTE recommends that the geotechnical representative observe the r ' ' I> J • Response to Third-Party Geotechnical Review Comments Proposed Eco-Friendly Auto Spa 6010 A venida Encinas, California Page 3 August 23, 2019 CTE Job No.: 10-13214T exposed ground surface at the overexcavation bottoms to evaluate the exposed conditions and determine suitability. It is also recommended that CTE test and observe all fill placement performed during grading for building pad areas in addition to utility trench and retaining wall backfill, aggregate base material, and asphalt pavements, in order to confirm proper moisture conditioning, placement methods, and relative compaction. We appreciate the opportunity to be of service on this project. Should you have questions, please contact the undersigned at your convenience. Respectfully submitted, CONSTRUCTION TESTING & ENGINEERING, INC. Dan T. Math, GE# 2665 Principal Engineer AJB/DTM/JFL Attachments: /~ Aaron J. Beeby, CEG #2603 Certified Engineering Geologist Figure 2, Geologic/Exploration Location Map Third-Party Geotechnical Review Comments (Second) o>I i1 NI e ::, o> 5-"' -C Q) E E 0 (.) 2 Q) "' C 0 C. "' Q) i st N I") ... i I ' 0 / "' .... 0 Q) ·e a.. O> O> O> I") ... I 0 ... 0 .... 0 0 0 I") ... I 0 / "' ...., 0 -~ 0 '-,( ~ \ · 00 '--co""' · -c;,,_..n:1 ~ ' · PM -J5385 ~ q f_---· ~--~-•i: _:..._---.-==--::.==---=_,,._...,,.f-~------::---~-ceafflr:' ------- \k~ · . · v-" \~. srs .J.a1.. 5 \ I ,, t\~ PARCEL NO. 1 .., ' , \.-t> \\lll~~~I ~~~~~~ ~~lo. I -} --i \t"a \V'IW.ttt,i_-::_.,:-~-~~== ·· P~~o \ \.== ,~ ---"' . t'~ 11-oao-21"'1;---\ ,-PARr.~I U\ {.II \ t u-- \ \ \~ >-\ g 7.i:;,.. ' ~ \~ .-1--ri-1~~ ~~~~-..... ::;it _/ \ \ , 00 , "' ,_. "l!i~. '? ·• >Ocoa \ ,r-. PM ·J3 ~ 'B ;.:~ ~/OLOI ·. \ / I \ -. ~ ~"':\\ ~ ... IY-lt,, F"""1:--"'~ ·~ \( ,j 2ii-030 \ ~ ~'i\, . \ \ ~,· ~-~ ' .......__,.,...-, ..,..✓,,,_ ,r.,; rf¢cJ· '·\ 'i',_· •~ I ""'--"'~~.-. ~~~:::r_ 1/ ' /(£)~ ,, __ _ ., ~ , ~tffi~~ ~-,.__,,.,. \ /," amm \ -____ _ \!_,£J~ ' t \ ~~-, ',._,,n:J \. ---· ~ OIC"67-I / . \ ¼suarc*, ,:---- \. ., @) , ~ \ f ., tym.m="® \ ~~ "('. -, , '? \ ''1>~ -• \ ;;-.• •: "' \ ''-_, lri /CIH£r'2' \ . "' '§.~" '\ ";:, ~~,0' @ \ ,-,.~ "' '\ ~ ~ (C)SOVl \ • MA.'MCI.£ \ \ t~4 -""";:::~2't,,~ VI?~~. ~::,~ REta100l /) ~ •ii:_, · 'fXJONOO IJ-29/ln PfR ,/ ~: ,~= ~-~ ~ ~",►.;'-;.~..-.;, ; EUC""""'-Y/,,,/ ~:-,; \ (f}SDGtE" /' • 'i-.Jel,.\.~:-f.:~~~~ VALU / .....-7 '\ _ \ \·.\ \\ ....,..,_,,"" IJC) _,,/' I \ , \'\ (0 WAIDII..: ,/ '\ "''= / -,\~ ~ '\\~\ . _,,,.//" 1, '\\,;,~ ' / tb ~\ ~~-' ~~ \_,,,./✓-/ r.a ~ \~ =--~ --~ ~ '~,~ }~ \'\,.a}~-•'! ,/// ;y """°'~ t' :1-~~il\'~''°'r.~~·~~~r~~ ,// \ '\& ~~~~~ -'"?'-,✓ ~✓,, PARCEL NO, 2 ' ~~ ,,,.%, __,,/\ ~'?' 9,755 AC, \ /;IMJl""':::r":.~•00' _,, ~½(C)SDIIA/f/lUPER PM -13-JO . , GRADffG A.ANS Oli'.AIIHC ~ r'\ ~~~-. ..._, . T _ WI U f-~j. ....,_._, '"".rt'"" ,..,-1 "\._ ; Wi','l'.£.IY-".....,,.""-"'-~ \ ;;r\ \~ \ ~-~ LEGEND \ ~p .. -/\ 1 <' ~ ~ ~"--~~ B-5~ APPROXIMATE BORING LOCATION ~/ <,, ,.,~ / 50' 0 25' 50' APPROXIMATE PERCOLATION TEST LOCATION ------- P-4$ Qop QUATERNARY OLD PARALIC DEPOSITS ~ '- Q) r----:~~----------.--=---:--------~111"'111'1"'1-~ ~ Cl~ Construction Testing & Engineering, Inc. GEOLOGIC/EXPLORATION LOCATION MAP~:---=--1 ,,,,, nvC --------=-----=--___:::...:_____ PROPOSED C!RimW) CAR wASH 1KPROV1111NTS / ~ • 1441 Montiel Rd Ste 115, Escondido, CA 92026 Ph (760) 746-4955 11010 AVINIDA INCINJS CARlfill.AD, CilD'ORNIA ...