6807 EVERGREEN WAY 2016-01-01 MF Import

IMP�RTAN�' [?VFORN:,AT10N • .4BUUT YOU�2 GEOTECHNICAL ENGINEERING REPORT More construction problems are caused by site subs,ir- face conditions than any o�her factor. As troublesome as subsurfzce problems can be. their frequency and extent have been lessened considerably in recent years. due in large measure to progrems and publicati�ns of ASFE/ The Associadon of Engineering Firms Practiciag in the Geosciences. The following suggestions and observations are offered to help you reduce the georechnical-related delays, cost-overruns and othPr costly headaches that can otcur during a constru .tion p:oject. A GEOTECHNICAL ENGINEERING REPORT IS BASED ON A UNIQUE SET OF PROJECT-SPECIFIC FACTORS A geotechnical engineering report is based on a subsur- face exploration plan designed to incorporate a unique set of proiect-specific factors. These typically include the general nature of the structure involved. its size and configuration: the location of the structure on the site and its orientation: physical concomitants such as access roads. parking lots. and underground utilities. and the lev?I of additional risk which the client assumed by virtue of limitations imposed upon the exploratory progrem. To help avoid costly problems. consuit the geotechnical engineer to determine how any factors which change subsequen[ to the date of the report may a(fect its recomrnendations. Unless your consulting geotechnical engineer indicates otherwisz. ueur geotecfuiical engineering report should not 6e used: . when the nature of the proposed svucture is changed. for exam�le, if an o(fice building vrill be erecred instead of a parking garage. or if a refriger- ated warehouse will be buiit instead ot an unre- frigerated one: . when the size or configuretion of the proposed structure is altered: , . when the loca[ion or orientation of the proposed structure is modified: . when there is a change of ownership, or . for application to an adiacent site. Geotechnical enyineers cannot accept responsibilitu (or vrahlems which may develop i( theu arz npt consulted a(ter �actors tonsid- ered in their reporfs development have chanqed. MGST GEOTECHNICAL "FINDINGS" ARE PROFESSIONAL ESTIMATES Si�e explora[ion identifies actual subsurface conditions only at those points where sampies are taken, when they are taken. Da[a derived through sampling and sub- sequent laborarory testing are extrapolared by geo- technical engineers who then render an opir,ion about overell subsuriace r.onditions, their likely reaction to proposed ccnstrur.tiun activity, anc appropriate founda- tion design. F.ven under cptimal circumstances actual conditions may ciffer from those inferred co ex ;t, because no gec;cchnical engineer. no matter how qualified. and no sut�surtace expio-ation progrem, no ma[ter how comprehensive, can reveal what is hidden by earth, rock and time. The ac�ual interface between mate- rials may be far more gradual or abrupt than a report indicates. Actual conditions in areas no[ sampled may differ from predictions. Nothing can be done to prevent (he imanticipateG, but steps can 6e taken to help minimize their impacf. For this reason, most ezperienced aw,tiers retain their geotechnical consultants through Ihe constructio.a stage. ro iden- tify variances, conduce addi�ional tests wh:ch may be needed, and to recommend solurons ro problems encountered on si[e. SUBSURFACE CONDITIONS CAN CHANGE Subsurface condi�ions may be modified by constandy- changing natural forces. Because a georechnical engi- neering report is based on conditions which e•.isted a; the time of subsur(ace exploration, cons�ruction decisions slinidd nnt be Hased mi a gentec(uiical engineering report whose adrquacu mau iiavr heen a((ecteA 6y time. Speak w�th the geo- technical consultant to learn if additional tests are advisable before cons[ruction starts. Construction operations at or adlacent ro the site and natural events such as floods. earthquakes or ground- water fluctuations may also affett subsurface conditions and. dws. the continui��g adequacy of a geotechnical report. The geotechnical �. igineer should be kept apprised of any such events. and should be consulted to determine if additional tests are necessary. GEOTL-CHNICAL SERVICES ARE PERFORMED FOR SPECIFIC PURPOSES AND PERSONS Geotechnical engineers' reports are orepared ro mee[ the specific needs of specific individuals. A report pre- pared lor a consulting civil engineer may not b: ade- quate (or a cons�ruction contrector. or even some other consulting civil engineer. Unless indicated otherwise. this repor! was prepared expressly for the dient involved and expressly for purposes indicated by :he client. Use by any other persons for any purpose, or by the dient for a different purpose, may result in problems. Na indi- vidual a:her than Ihe client should apply this reDort (or its inlended purpose withaut (�rst con/erring with the geoterhnical engineer. Nn persnn should apply lhis revort �or nny purrose olher thnn that originally contcmplat^d u�ithout �irst ton(rrring wilh the geolechni:al engineer.