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HMP 09-03; ROMERIA STREET CHANNEL IMPROVEMENT; GEOTECHNICAL EVALUATION; 2008-06-27
Romeria Street Drainage Improvement Project Carlsbad, California APPENDIX A TEST PIT LOG Field .Procedure for the Collection of Disturbed Samples June 27, 2008 Project No_ 106333001 Disturbed soil samples were obtained in the field using the fo11owing method. Bulk Samples Bulk samples of representative earth materials were obtained from the exploratory test pit. 1he samples were bagged and transported to the laboratory for testing_ 106333()01 R.doc Romeria Street Drainage Improvement Project Carlsbad, California Classification APPENDIXB LABORATORY TESTING June 27, 2008 Project No. I 06333001 Soils were visually and texturally classified in accordance with the Unified Soil Classification System (USCS) in general accordance with ASTM D 2488. Soil classifications are indicated on the log of the exploratory test pit in Appendix A. • Grad·ation Analysis Gradation analysis tests were performed on selected representative soil samples in general accor- dance with ASTM D 422. The grain-size distribution curves are shown on Figures B-1 and B-2. These test results were utilized in evaluating the soil classifications in accordance with the uses. Soil Corrosivity Tests Soil pH, and resistivity tests were performed on representative samples in general accordance with California Test (CT) 643. The soluble sulfate and chloride content of selected sa..111ples were evaluated in general accordance with CT 417 and CT 422, respectively. The test results are pre- sented on Figure B-3. R-VaJue The resistance value, or R-value, for site soils was evaluated in general accordance with Califor- nia Test (CT) 301. A sample was prepared and evaluated for exudation pressure and expansion pressure. The equilibrium R-value is reported as the lesser or more conservative of the two calcu- lated results. The test results are shown on Figure B-4. l 06333001 R_doc GRAVEL S,t\~!) FINES I Coarse Fine Coarse Medium Fine SILT CLAY T .. u.s: ST-ANOARD SJ EVE NUMBERS HYDR_OMETER 3' ·'Z 1W 1· ¾. t4·~ .. 4 8 16' 'lq ~<) '1j)O :?[!() 100,0 ~ J I j I I I I I ! · I ·, 90.0':: • I I • :r ....,... ,. ., I ,· • I .:J I I I ·I I l I. I ~-l I ,.\'>]', ' ' io:6 ' I I , .. , 'I ,., '' ' ! l I l • I, -~ ! ,. ', '' . ! [ I I I. j I (' ·1.· '' • " I.· ., ' , i\ !' ;•' h:-7~,o· .. : '' • . ., \ -I ., ,. •_'\ r:c I I " ' . 1. r : : .. , ,, ', /' '' C!>. .I I .1 r ·1 :I:. 1.' l I '.] J . ,~· ,:• .\ . .. ' .\:1:(, ' ' •' ·so:o· • ,' ., -.. •. .. >,-" 11 I I r . ·1· I : :I a;i I I I I J i I l I .N I ·n:: 60.0· • •' ·w II II I I .• I l 1:\-z .. • ii: ,j I I· ·1 I j . I l. l '. ,.· I • ':' '.I' .I-40.0 ' I I I I • ' .. I ·11 .. ··• z : :UJ, ·f . I I . l :I I I. .I 1: .. I ':i 0 .ao:o· .. ' ' : 0: '" w I I l 1: ,', I q:.. : i I I I I i: • I I ,. ,, I ·I : :i.o.ll ,, I I .1 I I I I 't I I I· .. '' : ' I ,, I I I f I I : I .. I 10,0 .. , " T I j I I I T I r: '' I -. I : . ,. : 0,-0 11.11 .II I .. ' ... I I ' I ' ' '" .. , .. . ' .#JO •. 10. 1 O:t, o.o~ 0.001 0.0001. 'G~j~i·$ifEJN M/Ll;l~l;'.f.J:;R~ ,. .. : Symbol sample b~ptl:i Uqu'id Piaitf¢ ·:Plasticity -Dfo·. El30•· ·,, Doo ©'u· C: P.~ss)ng._ .E~uivale"1 :. Location (ft) Limit Lirn)t· Ina.ex ,, No.200 •. uses . . , . (%) • TP-1 6.0.-1:0 --,. -..;. ----.... 37 SM PERFORMED ·IN GENERAL A<JCORDANCE WITH ASTM-D 422..:53 (02) l(in9o&J(\.llo~e GRADATION TEST RBSUL TS f.lGURE P.R0JECTNO. DATE B-1 -ROMERIA STREET DRAINAGE IMPROVEMENT PROJECT 106333001 6/08 CARLSBAD, CAt,JFORNIA 106"333001'.SleVE 7P~1 @ 6.0-7.0.x!s I GRAVEL SAND FINES I I Coarse I Fine Coarse Medium I Fine SILT CLAY I U.S. STANDARD SIEVE NUMBERS HYDROMETER 3• 2' 1½" 1" ¾! ½"¾ .. 4 ~ 100.0 16 30 50 100 200 I I I l I I I I~ ~a.. I I 90.0 I I I I I If I 'I\ I I I I ! I I I I I I 80.0 I I i '\. I I I I I " ' I-I I I I I I I I I i'l I 70.0 ' ::c II I I I I I I '-Cl iii I I I I I I I I I I $ 60.0 >-I I I I I £0 I I l I I I I I I I I Lr w 50.0 I I I I I I z u: I f I I I I I I I I I I-40.0 z II I II I I I I UJ I I I I I I I I j I I t) a: 30.0 w I : 1, I I I I a. I I f I I I I I I 20.0 I I I l I I I I I I I I I I I 10.0 I I I I I I I I I I I ·I. I I I I I I I I • I I 0.0 I I l I I 100 10 1 0.1 0.01 0.001 00001 GRAIN SIZE IN MILLIMETERS ., Sample Depth Liquid Plastic Plasticity Doo Cu Passing Equivalen1 Symbol Location (ft) Limit Limit Index D10 Dro c, No. 200 uses {%) • TP-2 10.0-11.0 -----------63 CL PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 422-63 (02) l(in90&fy\OO'f'8 GRADATION TEST RESULTS FIGURE PROJECT NO. DATE B-2 ROMERIA STREET DRAINAGE IMPROVEMENT PROJECT 106333001 6/08 CARLSBAD, CALIFORNIA 1063"3-3001 SIE.\11:n:>·2@ 10,0.11 O.xb Romerja Street Drainage Improv~ment Project Carlsbad, California AJ\fENDl'.X; ,C TYPICAL EARTHWORK GlJ,liDELJNES 106333001 TEGdoc Appendix C Project No. 106333001 Romeria Street Drainage Improvement Project Carlsbad, California TABLE OF CONTENTS Appendix C Project No. 106333001 Page 1. GENERAL ................................................................................................................................ 1 2. OBLIGATIONS OF PARTIES ................................................................................................ 2 3. SITE PREPARATION ........................................................................................................... :.3 4. REMOVALS AND EXCAVATIONS .................................................................................... .4 5. COMPACTED FILL ................................................................................................................ 5 6. OVERSIZED MATERIAL ...................................................................................................... 7 7. SLOPE·S .................................................................................................................................... 8 8. TRENCH BACKFlLL ............................................................... · ............................................. 11 9. DRAINAGE ............................................................................................................................ 13 10. SITE PROTECTION .............................................................................................................. 14 11. DEFINITIONS OF TERMS ................................................................................................... 16 Figures Figure A -Fill Slope Over Natural Ground or Cut Figure B-Transition and Undercut Lot Details Figure C -Canyon Subdrain Detail Figure D -Oversjzed Rock Placement Detail Figure E -Slope Drainage Detail Figure F -Shear Key Detail Figure G -Drain Detail 106333001 TEGdoc Rev 12/05 Romeria Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 106333001 TYPICAL EARTHWORK GUIDELINES lr GENERAL. These guidelines anri the standard -d.etails. attf,lched J'.1e.reto .are p,;:_es.ented as general proc.edu:r:es fo:r earthwork construction. They are to he utilized i:o. conjtmctitin with the. prqject grading plans. . . Thes~ guidelines .are considered a part of the geotti:Ch,nicF,1J report, b,µt are. sup~rsed\;ld by ree.om- mendittions in tne ge◊t~chnical rep0rt in the .c.a$~. of conflict. Evaluations performed by the qpnsultant .dunng the course of grading may result in new·re!,!omtnendations which c~11ld .supe,r..., ~ . -. . sede these specifica,tion.s and/or th,e .reci:.xmmendations .of th~ geote<:lmicf).l -.re.port. lt is the re$..p9il~iqiHty of the .contt:~ctor to read .and understand these guidelines as well as the geotechni- cal report and pr:oj ect .grading _plans, 1.1. The c01;1tractor shall not vary from these guidelines without prior ;recommendations by the .geotechnical consultant and the .approv:al of the client or th~ client's author- ized representative. Recomm¢ndations by .the geotechnieal consultant and/or client shall not be considered to.p:r_~~lude r,~qujremc1n.ts fo_r approval by the jurisdictional· ~gencyp:dorto the execution of.any-changes; • i .2. The contractor shall peri.enn ·the gtading;:operatiorts in;accotdance.·~itb, these ~peoi- ficatl·on_s,,. aQ:d_ sp.ali bt r~~pon~il>l~ for .the.. q1,1ality :of the finished pro-duct 1)otwithstand'ing the .fact that.gta:ding w.ork will be observeq. and tested by the geo-- technical e.onsultan,t. 1.3. It is the respo:nsibHit'y qf tbe .grading co:q.t;r:aytor to notify Jh~ .geoteq.bnical cons:ult- ant and. fue j.urisdictional agencies~ as needed~ prior. to the $tart ,of work at the· .site and at any ti:m.e· tliat gtading resumes .after intenuptJon. Each step-of the gradi:ng operations· shall be observed and documented by the g~otechhical cons.ultant and, where necessary,. reviewed by ihe appropriate jurisdictional agency prior to.pro- ceeding. with subsequent work. 1 .4. If, during the grading operations, geotechnical condition$ are ene.ot.mtered which • wer:e not anticipated or d~scrH~ed in tbei geoteclmical report, the geotechnical con- . su1tant .shall be notified immediately and additional recommendations, jf applicable, may be provided. 1.5. An as-graded r.eport shall be -pr:epared b_y the geotechnical consultant and signed by a registered engineer and registered engineering geologist. The report documents th~ geotechnical .oonsu1tants' observations, and ·field and laboratory test results, and 10<>33'.3001 TEGdoc Rev. )2/05 Romeria Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 106333001 provides conclusions regarding whether or not earthwork construction was per- formed in accordance with the geotechnical recommendations and the grading plans. Recommendations for foundation design, pavement design, subgrade treat- ment, etc., may also be included in the as-graded report. 1.6. For the purpose of evaluating quantities of materials excavated during grading and/0r locating the limits of excavations, a licensed land surveyor or civil engineer shall be retained. 1.7. Defmitions of terms utilized in the remainder of these specifications have been provided in Section 11. 2. OBLIGATIONS OF PARTIES The parties involved in the projects earthwork activities shall be responsible as outlined in the following sections. 2.1. The client is ultimately responsible for the aspects of the project. The client or the client's authorized representative has a responsibility to review the findings and r,eo0mmendations of the geotechnical consultant. The client shall authorize the con- tnictor anq./or other consultants to perform work and/or provide services. During grading the client or the client's authorized representative shall remain on site or remain reasonably accessible to the concerned parties to make the decisions that may be needed to maintain the flow of the project. 2.2. The contractor is responsible for the safety of the project and satisfactory comple- tion of grading and other associated operations, including, but not limited to, earthwork in accordance with the project plans, specifications, and jurisdictional agency requirements. During grading, the contractor or the contractor's authorized representative shall remain on site. The contractor shall further remain accessible during non-working hours times, including at night and during days off. 2.3. The .geotechnical consultant shall provide observation and testing services and shall make evaluations to advise the client on geotechnical matters. The geotechnical consultant shall report findings and recommendations to the client or the client's authorized representative. 2.4. Prior to proceeding with any grading operations, the geotechnical consultant shall be notified two working days in advance to schedule the needed observation and testing services. l06333001 TEG doc 2 Rev 12105 Romeria Street Drainage Improvement Project C~lsbad, California Appendix·C Project No. 1'0633300'1 2.4J. Prior to any significant expansfon ·or reduction in the grading operation, the geotechn.ical <lcODSu1t$t shall be pro:videc;l with two w0,rking days notice to make-appxop:ciare adjustments. in scheduling of on-site personiiel. 2.4..2. Between phases of grading :0p.eratlons, the geotechnical consultant .sbaU be provideg wi,tbJwo workir:tg days. ~otice in advance ofc0nunencement of ad- ditional-gradfug :q_peratiohs,. • -3. SITE:_PREJ>:ARATIO'.N Sit~ pr~par~tion. shall be perlbnned in accorda:n:ce with the xecommertdatio:ns pres~n.te4 • in tlie following sectfons. 3.1. Th~ -.client, -prfo.r: to· any site. p:repa:ratron -or grading, shall arrang~ and ,gttena a pre:.gtading meeting· betw~en the ·graqipg, contractor, the design ~ngiQeer~ th.e ~ep- technicai consultant, and represe:n,tatives .of app:r:op:riate governjbg authorii~es'~ as welt as any otbe;r in:yolvei;I p.u-:tje~ .. The parties shall be_given two workfog days no-ti~ • ' 3 .. ~.-Cle.ar,fr1g..and grubbing shall consist:o:f the ·substantial removal of-vegetation, brush,. g:r:a~s, wood) stµ,m._p~,. tr~es,. tree-_r9ots .. gr:eatey-than 1./2-inch i:n diam.eter, :and other de1eterfous: materials from-the a:teas·tg l>e: gtad¢.d1. GI earing and gyu]1bin,g-_ $hall ~?C- t~~!;}"-tqJh,~ 01;1t,S,i¢;e;9f.th~1 p~OJ)QS~'d exc~vatlon and-fill areas~ 3..3.. Demolition in th~ &rieas t~ 1:t~ graded $h~11 -haclude :removal ofbvuding structures, folilk 4atfo_n~ reserv.on:s~_milities (µ)eluding.. und~tgio:up.d pipefi1).es, septic truiks; le.ach· fiekls,. ~eepag4 pit$~ cts~em,st ·<;}ti:?~)~ ;.8Jld:o{her:mamnade· surf'ao~ .and subsunace 'improvements, anci the backfilling of mil.ling_ shafts, n:µipels $d ,surface depr~sion~~ P.emoUtiop. of utiifities. shall include :capp.ing or r.er~utin.g ,of pipelines at the project perimete:t\ and al;r~cl0~~1e,nt ◊f weJis-i.:P. accordan~,e. witll·th~ :t:equ4ementsof :tile goveinung autborities ancl'tb~.Jce.co.mm.eJlldati-0:0:s ,ofthe· geotecnnio~ c@t1s:tti~t,.at the tfule ef.<iiemolltion. • 3.4. Th¢ :debris .gen~rated. <::!ming clearing; gm;1bbing and/or demolition operations shall be removed. from -areia-s to ·oe graded and djspo.sed of off site at .a !€gal dump site. Cle.axing, gru'bblng, and demolition 0pe:tati0ns shalJ be performed under the obser- vation 0ft~e geotechnica.l consultant. 3 .5. The. ground surf~ce beneath proposed :qU area.s>shall be stripp.ecl of loose or unsuit- abl~ so.it These soils may be ltJse·d as comp.acted fill ptovided they are ge:nerally free of organic or other deleteri01:1s materi,ip:s and evaluated fo:r us.e by the geotech- nica1 consultant. The resulting surface shall be evaluated by the geotechnical consultant piio;r to proceeding. The cleared, natural ground surface shall be scari- J 0(,333001 TEO.doc 3 Rev. 12105 Romeria Street Drainage Improvement Project Carlsbad, CaU~ornia Appendix C Project No. 106333001 fled to a depth of approximately 8 inches, moisture conditioned, and compacted in accordance with the specifications presented in Sectio~1 5 of these guidelines. 3.6. ·where fills are to be constructed on hillsides or slopes, topsoil, slope wash, collu- vium, and other materials deemed unsuitable shall be removed. Where the exposed slope is steeper than 5 horizontal units to 1 vertical unit, or where recommended by the geotechnical consultant, the slope of the original ground on which the :fill is to be placed shall be benched and a key as shown on Figure A of this document shall be provided by the contractor in accordance with the specifications presented in Section 7 of this document. The benches shall extend into the underlying bedrock or, where bedrock is not present, into suitable compacted fill as evaluated by the geotechnical consultant. 4. REMOVALSANDEXCAVATIONS Removals and excavations shall be performed as recommended in the following sections. 4.1. Removals 4.1.1. Materials which are considered unsuitable shall be excavated under the ob- servation of the geoteclmical consultant in accordance with the recommendations contained herein. Unsuitable materials .include, but may not be limited to, dry, loose, soft; wet, organic, compressible natural soils, frac- tured, weathered, soft bedrock, and undocumented or otherwise deleterious :fill materials. 4.1.2. Materials deemed by the geotechnical consultant to be unsatisfactory due to moisture conditions shall be excavated in accordance with the recommenda- tions of the geotechnical consultant, watered or dried as needed, and mixed to a generally uniform moisture content in accordance with the specifications presented in Section 5 of this docun1ent. 4.2. Excavations 106333001 TEG.doc 4.2.1. Temporary excavations no deeper than 5 feet in firm fill or natural materials may be made with vertical side slopes. To satisfy CAL OSHA requirements, any excavation deeper than 5 feet shall be shored or laid back at a l :1 (hori- zontal:vertica1) inclination or flatter, depending on material type, if construction workers are to enter the excavation. 4 Rov 12/05 Romeria Street Drainage Improvement Project Carlsbad, Cal_ifemia Appe~dix C Project No. 106333'001 5. COMP AC,T;EiO FILL Fill shall be constructed as spedfied' befow or by other methods r¢oommended ·by the geotechni- cal .consultant. Unless otherwise, spe:cifi.ed, fill soils sha:J;I he. compacted to 90 percent relative compaotio~? .as-evaluated in accordance wit$. AS1M· Te.st 1)4ethod P 155.7. 5J. 13rro:r t(i}-p~ace:0,1ent of com,p~cted. fiH~. the contractor shall re.quest an ,evaluation of • the-exposed grolimd su~face by the· geotechnic_al c¢nsul{ant. Unless othtirw}se rec- ~m.1I!l.epc;Ied) ilie e~posed: grs0und 'su.tface .shall then . be .scarifi;ed to a d~ptl,l :o.f .ajproximately :_8: in◊n,e~ ~:lwa,ti;:F~d' or,dried, as-needed, -t()·~dhleve.a generally uni- form mofature ·content at or near ilie ·.optimum moisture -content. The scarified materials shall then 'be:. ~ompacted to 90 percent r.elatiY.e compaction. 'The evalua- tion of ·eompactiori by. the g~otecbnical cop.sultant shall n9t be .qonsider.ed to pr~clud'e any requirements for .observation or a,pprov.al by gpv.eming agencies. It is the conttactor's respo:h$i.~ility to notffy the geotechniqal consultant and the appro- ]Jaate goyetrfirtg· .a,gene:Y ·when proj.ect axeas· are i;,eadY for 0,.b~er,v;at:10111 and to. prc,:>vide ;r:e~0nable time 'for.'th_at review. 5.2. Excavated on-site-materials which rite in g~ner~ .cornp1iance with the recommenda- tions pf tbe. ge.otechnicai consultant ma}" be utiMze4 as c0n.:\,pa,9ted fill pr.ovided they ate generally ftee of0,1;g_aµfo or.,oiher .de1'e.terious mate.dais. m1d do not contain rock .fh1gments .. ,gteater than 6 imih~ ih f)im~n~fo;n, .During_ gra.d1Il.g~, the contractor may e,;n9oµr.it~r-soil typ{ts· :oth~r. tha;n those, .analyzed during the-prelhniruuy geotechnical stu,4¥• The .geotec}µ'!j_o,41 :¢9~u.li~ut sh.i'ill b~ !pQllsulte.d· to evaluate the -suitability of anr .such soHs for use as compacted. filJ. 5,3. Wh.~~Ji:;pp9l;'ted·m.ateri~l~ f\te. t~ ht;i U$e.d on site>. th~ ~eotechilical consultant sni;dl bt:f notified three,•·w9rl4ng aays .. fo ~dv~c.¢ of impoi;t~#<'.!:ti iu, Pr.der that it may ..srun- pl~ i:µ_d t~st 1he materials . .ftom .the p:r.oposed borr-0:w: sites. No imported materials sforll :\1)e delivered for :tJS:¢._® site witll@ut pri01; $arnpllng; te-sting, and evaiuation by the. g~otechnical consultant. • 5.4. . Soils imported for on-site-use shall preferably have v..ery low to }o:,,;,,r" .expansion po- tential (based on UBC Standard 18-2 test prncedwes). Lots on which ex:pansive soils :m~,y be exposed· at grade shall be undercut 3 feet or mo.re and c~pped with very I.ow to low .e~p.~I).$foh p(,)tenti~ -£iH, D(;ltfl1T$ .of the ua,deJJc•utting are provided in the Transition and Undercut Lot Details~ F:igme B-oft;hese. guidelines. In the event expansive soils are present near the.ground surface, special design and construction considerations. shall be utilized :in general accordance with the recor:ntnendatfons of the geotechnical consuitant. 5.5. Fill materials shall be moistur~ conditioned to near optimum moisture content prior to ,placement. The optimum moisture tontent will vary m,1h material type and other )0633.3001 TEG.doc 5 Rev 12/0S Romeria Street Drainage Improvement Project Carlsbad, California _Appendix C Project No. 106333001 factors. Moisture conditioning of fill soils shall be generally· uniform in the soil mass. 5.6. 1 Prior to placement of additional compacted fill material following a delay in the grading operations, the exposed surface .of previously compacted fill shall be pre- pared to receive :fill. Preparation may include scarification, moisture c.onditioning, and. recompaction. 5.7. Compacted fill shall be placed in horizontal lifts of approximately 8 inches in loose thickness. Prior to compaction, each lift shall be watered or dried as needed to achieve near optimum moisture condition, mixed, and then compacted by mechani- cal methods, using sheepsfoot rollers, multiple-wheel pneumatic-tired rollers, or other appropriate compacting roHers, to the specified relative compaction. Succes- sive lifts shall be treated in a like manner until the desired finished grades are achieved. 5.8. Fill shall be tested in the field by the geotechnical consultant for evaluation of gen- er,al compliance with the recommended relative compaction and moisture conditions. Field density testing shall conform to ASTM D 1556-00 (Sand Cone method), D 2937-00 (Drive-Cylinder method), and/or D 2922-96 and D 3017-96 (Nuclear Gauge method). Generally,. one test shall be provided for approximately every 2 vertical feet of fill placed, or for approximately every 1,000 cubic yards of fill placed. In addition, on slope faces one or more tests shall be taken for approxi- mately every 10,000 square feet of slope face and/or approximately every 10 vertical feet of slope height. Actual test intervals may vary as field conditions dic- tate. Fm found to be out of conformance with the grading recommendations sha11 be removed, moisture conditioned, and compacted or otherwise handled to accom- plish general compliance with the grading recommendations. 5.9. The· contractor shall assist the geotechnical consultant by excavating suitable test pits for removal evaluation and/or for testing of compacted fill. 5.10. At the request of the geotechnical consultant, the contractor shall "shut down" or restrict grading equipment from operating in the area being tested to provide ade- quate testing time and safety for the field technician. 5 .11. The geotechnical consultant shaJI maintain a map with the approximate locations of field density tests. Unless the client provides for surveying of the test locations, the locations shown by the geotechnical consultant will be estimated. The geotechnical consultant shall not be held responsible for the accuracy of the horizontal or verti- cal location or elevations. 5.12. Grading operations shall be performed under the observation of the geotechnicaI consultant. Testing and evaluation by the geotechnical consultant does not preclude the need for approval by or other requirements of the jurisdictio.nal agencies. 106333001 TEGdoc 6 Rev '12/05 I , Romeria Street Drainage Improvement Project Car,lsbad, California Appe.f.!di:x ·C ProjectNo. 1'06333001 5.13. Fill materjals.shall not be placed, spi:ead or ·compacted during unfavorable weather conditfons. When work is i~temipted tiy heavy rains, ·the filling operation shall not be resumed until ·tests indicate that: moisture eontent and .density of the fill meet the pt0Ject specificatiqns. Regr,ading qf the near:.surfaee soil may be needed to achieve the speciiie'd moisture content and :density. 5.14. Upon completion of grading and tenninatfon of observation t:;y. the g¢otec~foa1 consultant, no· further filli;n..g o.r ~xcavating~ inch:iding, that planned f 0r footings, foundations, :tetai-n:in~ wai1:s .or othet faaWt¢s, ·shall ~fo perfcir:med. without. fh~ 1n- Y@1v.etn<;int 9f the,:g~0t~clnifoal consnltant. 5.15. Fili placed ,in(atea:sv:ot _privi9.t:1.sly. vi:ew~q· and ·ev~uated,by·the ·ge0teclmicaJ con- .sultantmay hav-e roJ;,~, temov,ed -and recompa:cted'. at :the. ·¢0.i1trac1or's :eX:pense~. The ~i:epth. ~4 e~tent:of removal 0f the unobserved. and' ·undocumented-fil1 wi11 be· de .. -cided based upon :review 0f the field_ eondi:tion.s by the geate~hnical cons.ultant. . 5.J;6, Qf'f.:,site fri1 'shaH .ibe:treatecl in the same manner: as reeo~enqed in these sp:ecifica .. ti<~ns for :<m-:site. •fiH;s .. 0:ff--site fill ·subd'rains-temporarily ·1emun.ated (up gradient) :shall be sutvey,ed, fot future:-lo.catfug .and t0nnection .. 5:. 11. Prior to piacern:ent ~fa can.yon fi1f, a .subdtain shall be installed in bedtock or com- pacte4-fill ~opg tlie. .appfqxiµi~te alignr,nent .of the, cru,y.on-:bo.ttom if recommended· :t:>y the: .geotethniea1 co:a~ultant • .Deta,ils .pf sub.df~iP.. placemJ~,it. $d cq11figiµat:i◊u h.av~ J:,¢.e~:p:i:qy:i®d i:n:th.~:Can-:y.:o:p,-;:$\ibd:r.airt..J;J~ta:il; 'Fi~e Ct .of.these: guideiines~ $~IS. • Transition (~u:t/:6.11) :1~W slJ.,all g~n~taUY-:b,e µnd,erfa,1tJ: feet. or :morG; below finished grad¢ fo pr:ovid~:l'a gen:e.ra:liy unifo:tmthlclme.ss .of£,i1l soU in the pa~tru:ea. ·Whete the depth -Of fi11 0!1JI. trmisitio~ JQ{ greatly ~x.ceeds .3 feet; ,over:e:x:-cavation may be ih- creased at the discretion--ef the g~otedmical consu)tant D~iatJt;. of the im.4erc.ut for 1ransiti9n .lots are· pr-0.:V:idelci 1:0; the. TtiJhsition and·Undercut.Lat Detail, Fi,gure B, of these guidelin~s ... 6. OVE;RSlZED MATERIAL Oversized material shall be placed jn ,&ccm:dance with ·the foHowing reeommendatiqns, 6.l. During the course: of grading operations, ·tocks or simi1at irreducible materials greater than ·6 ihche·s i:b. .dhnension (over~ized material)' may be generated. These materials shall net be placed within the compacted :qll :unless. placed in gener?,l ac- cordance with the r~commendations of the geoteclmfoal consultant. 6.2. Where oversized rock (greater than 6-ihohes in dimensio:Q) or similar irreducible material is generated ,during gtad.ing~ it is :recommended, where practical, to waste such material o.ff ·s.ite) of on site in areas designated as "nonstructural rook disposal J063JJOO} TEG,iloc Rcv.12/05 Romeria Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 106333001 areas." Rock designated for disposal areas shall be placed with sufficient sandy soil to generally fill voids. The disposal area shall be capped with a 5-foot thiclmess of fill which is generally free of oversized material. 6.3. Rocks 6 inches in dimension and smaller may be utilized within the compacted fill, provided they are placed in such a manner that nesting of rock is not permitted. Fill shall be placed and compacted over and around the rock. The amount of rock greater than 3/4-inch in dimension shall generally not exceed 40 percent of the total dry weight of the fill mass, unless the fill is specially designed and constructed as a "rock fill." 6.4. Rocks or similar irreducible materials greater than 6 inches but less than 4 feet in dimension generated during grading may be placed in windrows and capped with finer materials in accordance with the recommendations of the geotechnica1 con- sultant, the approval of the governing agencies, and the Oversized Rock Placement Detail, Figure D, of these guidelines. Selected native or imported granular soil (Sand Equivalent of 30 or higher) shall be placed and flooded over and around the windrowed rock such that voids are fi11ed. Windrows of oversized materials shall be staggered so that successive windrows of oversized materials are not in the same vertical plane. Rocks greater than 4 feet in dimension shall be broken down to 4 feet or smaller before placement, or they shall be disposed of off site. 7. SLOPES The following sections provide recommendations for cut and fill slopes. 7.1. Cut Slopes !0633300! TEG doc 7.1 .I. Unless otherwise recommended by the geotechnical consultant and accepted by the building official, permanent cut slopes shall not be steeper than 2:1 (borlzontal:vertical). The recommended height of a cut slope shall be evalu- ated by the geotechnical consultant. Slopes in excess of 30 feet ·high shall be provided with terrace drains (swales) in accordance with the recommenda- tions presented in the Uniform Building Code, Section 3315 and the details provided in Figure E of these guidelines. 7.1.2. The geotechnica1 consultant shall observe cut slopes during excavation. The geotechnical consultant shall be notified by the contractor prior to beginning slope excavations. 7.1.3. If excavations for cut slopes expose loose, cohesionless, significantly frac- tured, or othern~se unsuitable materials, overexcavation of the unsuitable material and replacement with a compacted stabilization fill shal1 be evalu- ated and may be recommended by the geotechnical consultant. Unless 8 Rt:v 12/05 Romeria Street Drainage Improvem..ent Project Carlsbad, Califomia Appendix C Project No. 1-06333001 otherwise ,~eo.ified by the geoteolm:icru consultant, ~ta:bilizatiori. fill c.onstnJc- tio;n_ ·shall be ill gener~l accordance with the details provided on Figure F ,of these-g11ide1in~s .. 1.1A. Ir,-during the course 0£ :grading, adverse ·or p0tet1tialfy adverse geotechni:c~l con~tion:s, ar~'~JlG.o~tered in th~ slope whieh,,wet.e·not anticipated m the pre- tirriina,ry .evaluation re.port, the geQtecnnica:1 G'On~tiltant spall ~valuate the ·conaitrons and· ~rovide ~ppropriate recommendations .. 7 .2. Fill Slope~ lOOJJ;iQOJ TEG,doc 1.2.l. When; pl~~fug .fill on_ sfopes steeper fhan-.5::J (bGrizo.n,taI:v:ertiQ~)i topsoil, .slope w~~ ~lmtiuni, 1u:rd'. other materials -d.eemed. :unsuitable -.~hall be re- mo:ve1\L ~~~i~_Qrl,~Qnt~l, k;ey$_ ancl ne~vertical: be:n!?hes. '$al~ be excavated into sound'bedtock.0r firm fill material~ in flCOO::ra~cec witb,·th~ recommenda- . tj,qn of' the g!;l~techpical qm.sultant. Key,fng and ben~hing shall' be a~co;mpli'shed: in g'?~i;ital .a.c.a0r9an:ce-wi1h the. ,detail$ ·prov.id~ :~n:':f igµre A of :the$~-;gi.jidelm®. .• -t~or:npaoted fill. shali·not be placed m:ati ru:ea subs~quent to ke~~g -ap.d ~n~~ng. ,m.til the ar¢a has .been 0:bserv.ed b,y the geoteobriical cens:uitartt. W}ier.e:.tbe: riamal. gradient .of a slo~ i$ -Jess-thiin. 5::1.. 1,,~nching "is :g~n~tally:not:i;~ormn~nded. However; jjll shall :n:ot be·piaced 0:ricomptessi-. bie ototherwise u:nsuitable-materiids left or,t th~ slop~ face. 72..2. Wifhltta :sm.gfo: fill· area where· grading proced\lres .d~ctate twb or: mor:e sepa .. rat¢: fiHs~ teip.pQrw:y ~l~p~ (fal$.~ sfop~s) max -be :cr~ated. When placiii~ . .fill adjacent to a-ternporat,y":$1~:pe,. benciliing shalt be c~n$;tc:teq·:ih the .mapner, 9~- scribed in S·e.ctton 7 2 . .1. A 3;-foot ot higher near--vertical -.bench shall be excavated :iiito 1he-.docl!im,ented fill pri0tt◊ placement ,of.~~ditiona1 fill. 7 23.. Unless otherwise .reo0mmended 1;,y the•. geotec;hnical c;p:n;,uJtant and by the building 9ffie~al~. ~rrnanen,t fill.slopes sb.alLnot.be $le~er than 2:1 (horizon- tal:veftical), The heig4t -of a ftll s1ope shall b~ ~vaj,'!la~t}. .by the geeteclmicaj cQns:ultant. Slopes in -excess. of' 30: feet high shall be ·provided with terrace 4t:¢11s {s,waje~) -~cl b~ck,~ains, in aocqrdfilil.c.e. ·w.ith-th<::: recommendations pte- $ented hi the' U:ciform '.B:u1lding Code, Section'.33l;S·0and :the qetails provided. in Figl;lr.e.; E ofthese .~del:ines. 1.2.4. Unless spl;!cifically :rec0mmehded otherwfae, cpm,pacted fill slop.es shaU be overbuilt and cut ·back to grade, exposir/,g finn cotnpacted .fin. The actual amount of OYel'bui:kling may vary as field ,s:onditions dictate,. If the desired re- sults are-riot achieved, the existing slopes shall be o:ver-exc.avated and recQ~struqtecl-in MCordance with the· recommendations of the geotechn:ical consultant. The degree of overbuilding may be increased until the desired compacted ,slope face condition is achieved. Care .s:hal1 be taken by the c9n~ 9 Rev, J'U05 Romeria Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 106333001 tractor to provide mechanical compaction as close to the outer edge of the overbuilt slope surface as practical. 7.2.5. If access restrictions, property line location, or other constraints limit over- building and cutting back of the slope face, an alternative method for compaction of the slope face may be attempted by conventional construction procedures including backrolling at intervals of 4 feet or less in vertical slope height, or as dictated by the capability of the available equipment, whichever is less. Fill slopes shall be backrolled utilizing a conventional sheeps foot-type roller. Care shall be taken to maintain the specified moisture condi- tions and/or reestablish the same, as needed, prior to backrolling .. 7.2.6. The placement, moisture conditioning and compaction of fill slope materials shall be done in accordance with the recommendations presented in Sec~ tion 5. of~ese guidelines. 7 2.1. The contractor shall be ultimately responsible for placing and compacting the soil out to the slope face to obtain a relative compaction of 90 percent as evaluated by AS1M D 1557 and a moisture content in accordance with Sec- tion 5. The geotechnical consultant shall perform field moisture and density tests at intervals of one tesi for approximately every I 0,000 square feet of slope face and/or approximately every 10 feet of vertical height of slope. 7.2.8. Backdrains shall be provided in fill slopes in accordance with the details pre- sented on Figure A of these guidelines, or as recommended by the geotechnical consultant. 7.3. Top-of-Slope Drainage 7.3.1. For pad areas above slopes, positive drainage shall be established away :from the top of slope. This may be accomplished utilizing a berm and pad gradient of 2 percent or steeper at the top-of-slope areas. Site runoff shall not be per- mitted to flow over the tops of slopes. 7.3.2. Gunite-lined brow ditches shall be placed at the top of cut slopes to redirect surface runoff away :from the slope face where drainage devices are not oth- erwise provided. 7.4. Slope Maintenance !06J3300l TEGdoc 7.4.l. In order to enhance surficial slope stability, slope planting shall'be accom- plished at the completion of grading. Slope plants shall consist of deep- rooting, variable root depth, drought-tolerant vegetation. Native vegetation is generally desirable. Plants native to semiarid and arid areas may also be ap- propriate. Large-leafed ice plant should not be used on slopes. A landscape JO Rev. 12105 Romeria Street Drainage'Improvement Project Carlsbad, California _Appendix C PrnjectN◊. 106333'00'1 arol:rltect ~hall.be consult€d tegardin,g th.e.aetual.types ofpla:nts and planting configuration to be used. 1.4.2. Turigation pipes shcJ]l be anchored to ·sJopy faces an.cl. not placed in trenches ~xcavflted into slope fa:ces. Slope. :irr.igation}sha11 be -maintained at a level just :sij.fqc(~t ~q $.,tfp_p.0it'plantgi;owth1.J>r0p.e;rfy.: owne~~ shall be made awm-e that :.over watering of-s1~pes is detrimental tcrslb'p,e-.s_tal:>ilicy,.--8lq;pes s.h~U be-tno,ni- totted r.~gµlarly and broken spfin:kJe:r [heads:-and/or pipes ·shall be repaired -imrneclfotely. • 7.43. P~tlodic·◊bservatfon oflandscaped .slope ·ate$ ~hall be pl$lned an4 appro.pri- ate-.n:;1.e1:1su~~:t~ep; to enllaJice. gr-0wth·:of landscape plants. 'iA.4, Gratle~-~wal~S:-;;tt 1:he tojf ~f slepes f.llld terir~ui drains .shall be i;nsta11e.d ancl th~ preperty .owners notified that the drains ·shaU-he.p.erfodfoa11y' checked so that they may hfi kept-cl~a,r. Damage to draina.ge improvements shall be repaired im.niediately~ To redace siltation,; terrace ~ams· shall:be-coll$,troc:te4 at ·a gta-: -client .@f3-per-eent·-or ste.eper; -:in ac.cordanc.e-With ·:the recommendations of the p:toject:f;!i\:'.il :engineer. . 7 A5~ If slope,Jai1ur.es-ocom, the,geotedtr.rlcal c0:nsultant shall .be contacted irrimedi- p,tely _fqrfi~ld.r(lwiew of site ~ondi,tio:fts,,:an~i' clevehmm.ent of recommendations for-:evaluatfon and repair: s~ TRENCH '.BA:CKFILL '. . . , ,,.. ' Thefollowing-sectio:ns provide I,eCommendation$ fot backfillitig of tren~hes, ~:.1,-Tre~¢h b~c.\ifill sh~lt-con:s!st·pfg;ran:ul~r :sQit~ -(betiding) extending. from the tr.ench b:.ottom_,to Ji ot tn0te feet above tne pipe. on .. site tit pnp·o~ed fili which has ·been ~valuated by th~, geot~~h!ifo-al oons~1tant may be used· above the granular backfill. The cov.er soils-directly in. contact with tbe pipe shall l:Je 0lassifted ~shaving a very low expansfon p:oten.tial~ in -accordance wi:th tJBC Standard J 8.,.2; and shall contain no to'cks. or. ¢h:unlc$·0ofharcl •:soll h1rger than 3/4;.ihc;h.in µiime.tet. 8.2. . Trench backfill shall) unless otherwise recommend:ed, be· compacted by m~chanica1 1063J3001 TEO.doc means. to 90 percent. relative compaction as evaiuated· -in a:ccordanee with ASTM D 1557. Backfill soils shall be placed in loose lifts 8-:-ihches thick or tbinner, mois~ trite conditioned, and c0mpacted in acco;rdap.ce with the recommendations of .Sedion-5, ofthese gujdeHnes.-The backfill shall be tested' by the geotechnica1 con- sriJwnt at Vertical ~;o.tervals of app;roximateJy ·2 if eet of baek:f.ill placed and at .spacings along the tte:nch of approximately 100 feet frrthe s·a:rne lift. I1 RcY. 12/05 Romeria Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 106333001 8.3. Jetting of trench backfill materials is generally not a recommended method of den- sification, unless the on-site soils are sufficiently free-draining and provisions have been made for adequate dissipation of the water utilized in the jetting process. 8.4. Jf it is. decided that jetting may be utilized, granular material with a sand equivalent greater than 30 shall be used for backfilling in the areas to be jetted. Jetting shall generally be-considered for trenches 2 feet or narrower in width and 4 feet or shal- lower in depth. Following jetting operations, trench backfill shall be mechanically compacted to the specified compaction to finish grade. 8.5. Trench backfill which underlies the zone of influence of foundations shalJ be me- chanically compacted to 90 percent relative compaction, as evalµated in accordance with ASTM D 1557. The zone of influence of the foundations is generally defined as the roughly triangular area within the limits of a 1 : 1 projection from the inner and outer-edges of the foundation, projected down and out from both edges. 8.6. trench backfill within slab areas shall be compacted by mechanical means to a relative compaction of 90 percent relative compaction, as evalu.ated in accordance with ASTM D 1557. For minor interior trenches, density testing may be omitted or spot testing may be performed, as deemed appropriate by the geotechnical consult- ant. 8.7. When compacting soil in close proximity to utilities, care shall be-taken by the grading contractor so that mechanical methods µsed to compact the soils do not daI11~ge the utilities. If the utility contractors indicate that it is undesirable to use compaction equipment in close proximity to a buried conduit,. then the grading con- tractor may elect to use light mechanical compaction ·equipment or, with the approval of the geotechnical consultant, cover the conduit with clean granular ma- terial. These granular materials shall be jetted in place to the top of the conduit in accordance with the tecommendatiohs of Section 8.4 prior to initiating mechanical compacti0n procedures. Other methods of utility trench compaction may also be appropriate, upon review by the geotechnical consultant and the utility contractor, at the tim~ of construction. 8.8. Clean granular backfill and/or bedding materials are not recommended for use in slope areqs unless provisions are made for a drainage system to mitigate the poten- tial for buildup of seepage forces or piping of backfill materials. 8.9. The contractor shall exercise the specified safety precautions, in accordance with OSHA Trench Safety Regulations, while conducting trenching operations-Such precautions include shoring or laying back trench excavations at 1 : 1 or flatter, de- pending on material type, for trenches in excess of 5 feet in depth. The geotechnical consultant is not responsible for the safety of trench operations or stability of the trenches. 1063J3001 TJ;Gdoc 12 Rev. 12/05 Romeria Street Drainage Improvement Project Carlsbad, California 9. DRAINAGE AppendixC Projeci No. 10.6333001 The following sections provide rneommendations. pertaining to site drahtage. 9. .1. Canyon, '·subdram s.y.sterns. ree0mme;nded by tlle: ge0teolroical:consultap_t shall he in- s.tall¢~ fn. aoqordan:qe wtth the Canyon·subdrain !?etai~·, Figate,C,. pt.ovideq.ili these gli'ddelines. • C~y<:>n. i,tib.d'tain~ shall be inStaUed to • ~onfonn to the approximate alignment and.:c1etails sshow.n .. on projeetplans. The ~ctual suborafu location shajl be evaluated by the :geotechnical consultant in the field durfog grad1n,g. Materials specified in the att8;ched Canyon. Suparai.tt Detail shall nQt be changed or modified un.1-ess· so reeo.r.m:nen.ded l:>y the :geoteehmca1 consui1ant. Subdt:ains :shall be sm-- -v.eyed 1by a. Jieen:s·ecl' faod surveyotlci.½l engine.er for· 'J1ne and' g_tade after i'nstlillatio'tli Sufifofont ··time. shciI1: be· alfowe.d' f0i· tlle ·survey$ ptfor tp cQmmep.~.e:.. nrent <?ffillmg.,o:ver·the s:ubdr.ains. • 92. Ty,pfoal b~ckdraji.is :for-stability, side hill? and. shear. k~y fills ·shall be installed in ac;cordauce:•With the•,details provided on Figure A, Fjgtire I\ and Figuie G of.these ~uidelihes. 9.3. Roof~ :pad7 and .slope utainage s4a:ll .'be .such that it is away· from sJopes an<;l struc- ture~ to suitable discharge areas· by nonetodible dev1ees (~.g., gutters,, downspouts, concrete. ·swales, e{Q.). .. • 9.4. ·P.o&iti:ve.·drainag~ a:dj:acen.t'te sttuetutes $h;µ'l be. establishe4.anq rpai:ntaJned. Posi,. ti.ve 4rainage m~y, be accomplished by· p:ro:¥idmg dta.i:pa~ away .from the foun:O;1#ons. ,of th~ $it:ti~tµt$ .. at a .gr-~rdfo,nt of'.2 p©JJc·en~ or, '.ste~~r for a distance of 5 feet •<l>r.m.o.re outside. th~· buildiRg perimeter,. furlh~t ~.aintained by a graded sw"!le ~e~<;ling ·to-an appropriate outlet, .. an 'E).'ee<;,rdant:e with the :rec.o:tmnend~tioBs 0f the pxoj~ot civil' •~htine-er ,and/or landscap~ .ar~hiteet. 9 5. 8Jtr.faQe· drainag~, <m: :the :site shall be p.i:o:vided so. that water is· not p.ermitted to pon<\L A gradient.pf2 pe:rcent.-0.r st~~.per -sb:a11 be :in~mtafned over the pad area and drainage patterns: shall be established t~ xe:rpove w~:t¢r· from the site to, an appropri- ate .0utlet. 9 .6, Care ~hal.l be· t9,lceµ it?Y the co.n:t;r~ctqr du'l;',ing :fini$h. :gtadir1g to pteserve any berms} drainage terraces~. ipterc.eptor swaJes or· o.ther &a.ini:i;ge ,qevi~¢s of a p.ennanent na~ fure on or ~djacent to the property. Drainage patterns established at the time of. :finish gr,adin,g shall he maintained for the life of the project Property o;wners shall be made vezy cJeady aware that altering, drainage patterns may be detrimental to slope stability and founoation performamee. 106333001 TEG.doc 13 Romeria Street Drainage Improvement Project Carlsbad, California 10. SITE PROTECTION The site shall be protected as outlined in the following sections. Appendix C Project No. 106333001 10.1. Protection of the site during the period of grading shall be the responsibility of the c0ntraet0r unl~ss other provisions are made in writing and agreed upon among the concerned parties. Completion of a portion of the project shall not be considered to preclude that portion ·or adjacent areas from the need for site protection, until such time as the -project is :finished as agreed upon by the geotechnical consultant, the client, and the regulatory agency. 10.2. The contractor is responsible for the stability of temporary excavations. Recom- mendation_s by the geotecbnical consultant pertaining to temporary ex.cavations are made in consideration of stability of the finished project •and, therefore, shall not be considered to preclude the responsibilities of the contractor. Recommendations by the geotechnical consultant shall also not be considered to preclude more restrictive requirements by the applicable regulatory agencies. 10 .3. • Precautions shall be taken during the performance of site clearing, excavation, and grading to protect the site from flooding, ponding, or inundation by surface runoff. Temporary provisions shall be made during the rainy season so that surface runoff is away from and off the working site. Where low areas cannot be avoided, pumps shall be provided to remove water as needed during periods of rainfall. 10.4. During periods of rainfall, plastic sheeting shall be used as needed to reduce the po- ten#al for unprotected slopes to become saturated. Where needed, the contractor shall install check dams, desilting basins, riprap, sandbags or other appropriate de- vices or methods to reduce erosion and provide the recommended conditions during inclement weather. 10.5. During periods of rainfall, the geotechnical consultant shall be kept informed by the contractor of the nature of remedial or precautionary work being performed on site (e.g., pumping, placement of sandbags or plastic sheeting, other labor, dozing, etc.). 10.6. Following periods of rainfall, the contractor shall contact the geotechnical consult- ant and arrange a walk-over of the site in order to visually assess rain-related damage. The geotechnical consultant may also recommend excavation and testing in order to aid in the evaluation. At the request of the geotechnical consultant, the contractor shall make excavations in order to aid in evaluation of the extent of rain-related damage. 10.7. Rain-or irrigation-related damage shall be considered to include, but may not be limited to, erosion, silting, saturation, swelling, structural distress, and other ad- verse conditions noted by the geotechnical consultant. Soil adversely affected shall be classified as "Unsuitable Material" and shall be subject to overexcavatjon and I063JJOOI TEG doc 14 Romeria Street Drainage Improvement Project Carlsbad, Ca1ifomia Appendix C Project No. 10633-3001 replacement with compacted nH 0r t~ other remedial gradhrg as recomm,ended by the_._geotechnical consultant. 10.8. Relatively leyeJ. areas.where saq.1tated. soils .and/or erosion gullies exist to depths greater than 1 foot ,shall be· ov.erexeav~t,ed to. competent materials. ~s ev.~luated. by tb:e-.:geqt~c)uical cJn;1.:&:ultaJ.1t, Wher~·:ad:verse conditions extend to less than 1 foot fo depth~ -satutateeJ::a:ngi<:>ter0cled mate,tialtmay.be processed in-~fac~, Overexcavated or i.nt-pla¢e p:tdGe$sed materials :shall ,:be n10isture· conditro;ned ~d: ~ompacte¢1 ip: ac- corµa,n~~ wi1lh. th~ r~¢qmme:nclatipn:s·J>roviijed .in Section 5, ff the-desired re$ults are n0t achieved~ the. l:iffeeted materials,: shall'be ov:~:texc~rvated~ moisrure ·cpnqitioned, ;im:l compacted uptH 1he: sp.e;cific.atfons are met. 10.9. Slope·,are~ wl),e.r~·$atur:a.t~d_:'$pil anolor er,osfon gullies exist t0:.depths greater than 1 foot-shall be .. ever.excavated and,te,pfa¢~d 1as .. c~ni;pacted.ti1Hn: a,c,cordap.ee with the :ijppliGal;>le spe~,ii£i:c.at1.o.li\$, \Vh(};re :ad;v.er,se};y affe.cted materials exist to depths .of 1 ·fo0t 0r -Ies.s below pro;pQ,sed fjnj_sh¢.:d' grade, t~medial '.grading by mowture condi- tiol).in;g fo7place and comp.adion-in,accortlance. with the J~pptop:riate 'Spe.cific~~lo11si may be ~tte~pt~d. If the' desire.d results are not achieved, the affected materials shall be overexcav.ated~ ·meistme· ·c◊r:tditio!}e.d;; and compacted until the Speqifrca- tions ·ar¢-met. As conditions dktate7 :€},ther· slqpe• repair 'procedures may also· be recommended by tae.•ge01€~JmicakG0.tisultant 10.10.. During constmuctiort~ thtfcontractor shati:.grade the-site to-.prov:ide positive dtainage ~wa,y from: s:tp,i¢tures and· to keep water: from ponding adjacent to structures. Wsater shall.not be::alfow.ecl: to .d1ti);l~gp 1adjr~c·ent :pr~p:erties. Positi:ve:·clrnil).ag1:1. ,sbaU. ·l?e:main- t~ed. by.· the •contraci◊r·uniil-p:ei:nnm~nt-.:dtai::rrag¢ ana ernsi:on teducing,·devices -are installe_d· in a~c.0.rQ.@Q.e ·witb p,rojeet.plan~., • 106:l)JOOI TEG doc 15 Rev 12105 Romeria Street Drainage Improvement Project Carlsbad, California Appendix C ProjectNo. 106333001 lL DEFINITIONS OF TERMS ALLUVIUM: AS-GRADED (AS-BUILT): BACKCUT: BACK.DRAIN: BEDROCK: BENCH: BORROW (IMPORT): BUTTRESS FILL: CIVIL ENGINEER: CLIENT: COLLUVIUM: COMPACTION: 106333001 TEGdoc Unconsolidated detrital deposits deposited by flowing water; includes sediments deposited in river beds, canyons, flood plains, lakes, fans at the foot of slopes, and in estuaries. The site conditions upon completion of grading. A temporary construction slope at the rear of earth-retaining structures such as buttresses, shear keys, stabilization fills, or retaining walls. Generally a pipe-and-gravel or similar drainage system placed behind earth-retaining structures such as buttresses, stabilization fills, and retaining walls. Relatively undisturbed in-place rock, either at the surface or beneath surficial deposits of soil. A relatively level step and near-vertical riser excavated into sloping ground on which fill is to be placed. Any fill material hauled to the project site from off-site areas. A fill mass, the configuration of which is designed by engi- neering calculations, to retain slopes containing adverse geologic features. A buttress is generally specified by a key width and depth and by a backcut angle. A buttress normally contains a back drainage system. The Registered Civil Engineer or consulting firm responsible for preparation of the grading plans and surveying, and evaluating as-graded topographic conditions. The developer or a project-responsible authorized represen- tative. The client has the responsibility of reviewing the findings and recommendations made by the geotechnical consultant and authorizing the contractor and/or other con- sultants to perform work and/or provide services. Generally loose deposits, usuaBy found on the face or near the base of slopes and brought there chiefly by gravity through slow continuous downhill creep (see also Slope Wash). The densification of a fill by mechanical means_ 16 Res. 12105 Romerla Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 1,06333001 CONTRACTOR: A per$on or qqmpany undei-t .C0E1ti:act or .0tberwi;;e :retained .by the. olient to perform demolition, grading, and other site :hnpfovernents~ DBBRlS:. The products -of <;leariirg,· gm1ibing, and/or dem,o1ition, or .c.ontantlna;ted:.soiI•material-unsui:tahle·fot :reuse '.as -co~pa0,teq fjll~ au,d7iw .any other. :materiaJ $0--designated by the geot-ech- nical eonsui:tant. •• ENGJNEE~D FltL; A·fi1i wmch the .geotechnicaf consultant or -the consultant~ representative ha,s:. Qbservecl and/or tested ·during pfacement,. .enabling, the :consultant to conclude that the fill .ha$. be.en. pJiw~g ~n .. ~pst1mtial qorop.Uance· with the. r:ecornmendatlt1>ns • of.the geot¢c~cal e:onsi;iltant/aµd·th.e g9verning ~gency re~ qui;remenis.. ENGINEERING GEOLOGIST: A g~Ql<1>_gi$t 1;egjm.e.rce<;i by the· state licensing agency who ap- plies. geofogic knowled;ge and principles to the exploration a,nd ,,ev,c_d.uation pf natut.~lly 0ccurring rock and, soil, as· re ... l,afe_d to UJ,e d¢~~gn Q;f civil W;Qrks. EROSlON; The wearing-aw.ay .ef the grou;tia. sµrfac.e a.s a t~sult of the. m~vem.ent ·of wind., water, and/or ice> EXCA'VAflO:N': T;h~ .m,ech:~9,m).t1em:0~'!'.tof~!imh:11,1ate#al.s. EXIS:tM.G·GRAJJEi the .gi;otind ·surface _e(?:tµjg1;1r!:J.tfori· pri.:of tq .grading; original ,g:r:a,d~ .. FILL: Any dep<;>.sft gf.:sqµ,. r.ock, soil.:rock blend~, fit otq,!;l:r. similar materiais,placed by man. FJNISH GRADE: ·Th.e·as--:graqed grotmt.f surface elevation. that conforms to the gr~ding p,an. GEOFA'.BRIC~ An engineering textile utilized m geoteclmical applications such ~s su'bgracle stabilization and filteiin/$- GEOTECHNICAL CONSULTANT: The geotechnfoal ~ngineerlng ~d .engineering geology con- sultfog finn retained to pi:ovide technical services for the project. F0r the purpose of these_ sp.ecifications~ observations by the :geotedmical cons.ult&nt include observation~ by the geotecb.hical engineer, ~ngineering geologist and other per~ sous employed by and responsible to the geotechnical consultant. 106333001 TEG.doc 17 Re" 1210$ Romeria Street Drainage Improvement Project Carlsbad, California Appendix C Project No. 106333001 GEOTECHNICALENGINEER: A licensed civil engineer and geotechnica] engineer, regis- tered by the state licensing agency, who applies scientific methods, engineering principles, and professional experience to the acquisition, interpretation, and use of knowledge of materials of the earth's crust to the resolution of engineering problems. Geotechnical engineering encompasses many of the engineering aspects of soil mechanics, rock mechanics, geology, geophysics, hydrology, and related sciences. GRADING: Any operation consisting of excavation, filling, or combina- tions thereof and associated operations. LANDSLIDE DEPOSITS: Material, often .porous and of low density, produced from instability of natural or manmade slopes. OPTIMUM MOISTURE: The moisture content that is considered optimum to compac- tion operations. RELATIVE COMPACTION: The degree of compaction (expressed as a percentage) of a material as compared to the dry density obtained from ASTM test method D 1557. ROUGH GRADE: The ground surface configuration at which time the surface elevations approximately conform to the approved p]an. SHEAR KEY: Similar to a subsurface buttress; however, it is generally con- structed by excavating a slot within a natural slope in order to stabilize the upper portion of the slope without encroach- ing into the lower portion of the slope. SITE: The particular parcel of land where grading is being per- formed. SLOPE: An inclined ground surface, the steepness of which is gener- ally specified as a ratio of horizontal units to vertical units. SLOPE WASH: Soil and/or rock material that has been transported down a slope by gravity-assisted by the action of water not confined to channels (see also Colluvium). SLOUGH: Loose, uncompacted fill material generated during grading operations. SOIL: Naturally occurring deposits of sand, silt, day, etc., or com- binations thereof l06333001 TEG doc 18 Rev 12/05