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HomeMy WebLinkAboutLUA-08-090_MiscGEOTECHNICAL ENGINEERING STUDY SOUTHWEST 43rd STREET AND OAKSDALE AVENUE SW RENTON, WASHINGTON ~~ ~vi~~ E-3000-3 ~~~ti.~O .,~\.Q...O ~" c<;>o' December 8, 1SS7 ~~ \ 'l. i ~ c~i GEOTECHNICAL ENGINEERING STUDY SOUTHWEST 43rd STREET AND OAKSDALE AVENUE SW RENTON, WASHINGTON E-3000-3 December 8, 1997 PREPARED FOR ZELMAN DEVELOPMENT COMPANY _ .... '-l:,:;"r~·=:. l,/t$\'ib' ------ Kyle R. Campbell, P.E. Manager of Geotechnical Service:5 Earth Consultants, Inc. 1805 -136th Place Northeast, Suite 201 Bellevue, Washington 98005 1425) 643-3780 IMPORTANT INFORMATION ABOUT YOUR GEOTEG-INICAL ENGINEERING REPORT More construction problems are caused by site subsur- face conditions than any other factor. As troublesome as subsurface problems can be. their frequency and extent have been lessened considerably in recent years. due in large measure to 'programs and publications of ASFE/ The Association of Engineering Firms Practicing in the Geosciences_ The following suggestions and observations are offered to help you reduce the geotechnical-related delays, cost-overruns and other costly headaches that can occur during a construction project_ A GEOTECHNICAL ENGINEERING REPORT IS BASED ON A UNIQUE SET OF PROJECT~PECIFIC FACTORS A geotechnical engineering report is based on a subsur- face exploration plan designed to incorporate a unique set of project-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 level of additional risk which the client assumed by virtue of limitations imposed upon the exploratory program. To help avoid costly problems. consult the geotechnica\ engineer to determine how any factors which change subsequent to the date or the report may affect its recommendations. Unless your consulting geotechnical engineer indicates otherwise. your geoleclinica/ engineering report s~"ld not be used: • When the nature of the proposed structure is changed. for example. if an office building will be erected instead of a parking garage. or if a refriger- ated warehouse will be built instead of an unre- frigerated one: • when the size or configuration of the proposed structure is altered: • when the location or orientation of the proposed structure is modified: • when there is a change of ownership. or • for application to an adjacent site. Geolechnical engineers cannol accept responsibility for problems which may deoe/op if lhey are not consulled after factors consid- eml in their report's development have ,hanged. MOST GEOTECHNICAL "FINDINGS" ARE PROFESSIONAL ESTIMATES Site exploration identifies actual subsurface conditions only at those points where samples are taken. when they are taken. Data derived through sampling and sub- sequent laboratory testing are extrapolated by geo- . technical engineers who then render an opinion about overall subsurface conditions:their likely reaction to proposed construction activity, and appropriate founda- tion design. Even under optimal circumstances actual conditions may differ from those inferred to exist. because no geotechnical engineer, no matter how qualified. and no subsurface exploration program. no matter how comprehensive. can reveal what is hidden by earth. rock and time. The actual Interface between mate- rials may be far more gradual or abrupt than a report indicates. Actual conditions in areas not sampled may differ from predictions_ Nothing can be done to prevenl the unanticipated, bul steps can be taken to help minimize !tteir impact. For this reason. most experienced owners rruiln their geoteclinical ,onsultants through the construction stage. to iden- tify variances. conduct additional tests which may be needed. and to recommend solutions to problems encountered on site. SUBSURFACE CONDITIONS CAN CHANGE Subsurface conditions may be modified by constantly- changing natural forces. Because a geotechnical engi- neering report is based on conditions which existed at the time of subsurface exploration, ,onstruction decisions slaould not be based on a geotechnica/ engineering report whose adequacy may hav, been affected by lime. Speak with the geo- technlca\ consultant to learn if additional tests are advisable before construction starts. Construction operations at or adjacent to the site and natural events such as floods. earthquakes or ground- water fluctuations may also affect subsurface conditions and. thus. the continuing adequacy of a geotechnical report. The geotechnical engineer should be kept apprised of any such events. and should be consulted to determine if additional tests are necessary. GEOTECHNICAL SERVICES ARE PERFORMED FOR SPECIFIC PURPOSES AND PERSONS Geotechnical engineers· reports are prepared to meet the specific needs of specific individuals. A repcrt pre- pared for a consulting civil engineer may not be ade- quate for a construction contractor. or even some other consulting civil engineer. Unless indicated otherwise. this report was prepared expressly for the client involved and expressly for purposes indicated by the diem. Use by any other persons for any purpose. or by the client for a different purpose. may result in problems. No indi- vidual other titan !he client should apply 1/,Js report for Its i•tended purpose without first conferring with the geotechnical engineer. No pmoo should apply this report for any purpose other titan that originally conttmf](ated w•ilhout first conferring with lhe geolechnical enginee, A GEOTECHNICAL ENGINEERING REPORT IS SUBJECT TO MISINTERPRETATION Costly problems can occur when other design profes- sionals develop their plans based on misinterpretations of a geotechnical engineering report. 'lb help avoid these problems, the_geotechnical engineer should be retained to work with other appropriate design profes- sionals to explain relevant geotechnical findings and to review the adequacy of their plans and specifications relative to geotechnical issues, BORING LOGS SHOULD NOT BE SEPARATED FROM 1HE ENGINEERING REPORT Final boring logs are developed by geotechnical engi- neers based upon their Interpretation of field logs !assembled by site personnel) and laboratory evaluation of field samples. Only final boring logs customarily are induded in geotechnical eJl€lneering reports_ These logs should not under any circumstances he redrawn for lndusion in architectural or other design drawings, because drafters may commit errors or omissions In the transfer process. Although photographic reproduction eliminates this problem, It does nothing to minimize the possibility of contractors misinterpreting the logs duriJl€ bid prepara- tion. When this oocurs. delays, disputes and unantici- pated costs are the all-too-frequent result. 1b minimize the likelihood of boring log misinterpreta- tion, give contractors ready access to tfle complete geotechnical engineering report prepared or authorized for their use, Those who do not provide such aocess may proceed un- der the mistaken impression that simply disclaiming re- sponsibility for the accuracy of subsurface Information · always insulates them from attendant liability. Providing the best available information to contractors helps pre- vent costly construction problems and the adversarial attitudes which aggravate them to disproportionate scale, READ RESPONSIBILITY CLAUSES CLOSELY Because geotechnical engineering is based extensively on judgment and opinion, it is lar less exact than other design disciplines. This situation has resulted in wholly unwarranted daims being lodged against geotechnical consultants. 'lb help prevent this problem. geotechnical engineers have developed model clauses for use in writ- ten transmittals. These are not exculpatory clauses designed to foist geotechnical engineers' liabilities onto someone else. Rather, they are definitive dauses which identify where geotechnical engineers' responsibilities begin and end. Theiruse helps all parties Involved rec- ognize their individual responsibilities and take appro- priate action. Some of these definitive clauses are likely to appear in your geotechnical engineering report, and you are encouraged to read them close!)( Your geo- technical engineer will be pleased to give full and frank answers to your questions. 01HER STEPS YOU CAN TAKE TO RE;DUCE RISK Your consulting geotechnical engineer will be pleased to discuss other techniques which can be employed to mit- igate risk. In addition. ASFE has developed a variety of materials which may be beneficial. Contact ASFE for a complimentary copy of its publications directory Pu&lis/,ed by A5FeTHEASSOCIATION OF ENGINEERING FIRMS PRACTICING IN THE GEOSCIENCES 8811 Cole!Nille Road/Suite G 106/Silver Spring. Maryland 20910/(301) 565-2733 .. 0788/'.iM l ' t ! I 1 l December 8, 1997 Zelman Development Company 707 Wilshire Boulevard, Suite 3036 Los Angeles, California 90017 Attention: Sanford Kopelow Dear Sanford: E-3000-3 We are pleased to submit our report titled "Geotechnical Engineering Study, SW 43rd Street and Oaksdale Avenue SW, Renton, Washington." This report presents the results of our field exploration, selective laboratory tests, and engineering analyses. The purpose and scope of our study was outlined in our October 7, 1997 proposal. Based on the results of our study, it is our opinion the site can be developed generally as planned. In our opinion, the proposed buildings can be supported on conventional spread and continuous footing foundation systems bearing on at least two feet of structural fill following the successful completion of a preload program, or surcharge program in areas where minimal raising of site grades will be required. Slab-on-grade floors can be supported directly on the fills required to bring the site to grade. We appreciate this opportunity to have been of service to you. If you have any questions, or if we can be of further assistance, please call. Very truly yours, EARTH CONSULTANTS, INC. Kyle R. Campbell, P. E. Manager of Geotechnical Services KRCJl<ml 1805-1361h Place N.E., Suite 201, Bellevue, Washington 98005 Bellevue (425) 643-3780 Seattle (206) 464-1584 FAX (425) 74-608-60 Tacoma (253) 272-6608 TABLE OF CONTENTS E-3000-3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . 1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . 1 Project Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SITE CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Subsurface . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Groundwater . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . • . 2 Laboratory Testing . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DISCUSSION AND RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 General ..•.......•..... .' ..... , . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Site Preparation and General Earthwork • . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Preload/Surcharge Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Foundations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Retaining and Foundation Walls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Slab-on-Grade Floors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . 8 Seismic Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Excavations and Slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 o Site Drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Pavement Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Utility Support and Backfill . . . . . . . . . . . . . . . . . . . . . • . . . . . • . . . . . . . . 13 LIMITATIONS .................................................. 13 Additional Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 APPENDICES Appendix A Appendix B ILLUSTRATIONS Plate 1 Plate 2 Plate 3 Plate 4 Plate 5 Plate A1 Plates A2 through A9 Plates A10 through A30 Plates A31 through A38 Plates 81 through B5 Plates 86 and B7 Field Exploration Laboratory Test Results Vicinity Map Boring and Test Pit Location Plan Typical Settlement Marker Detail Typical Footing Subdrain Detail Utility Trench Backfill Legend Boring Logs Test Pit Logs Previous Exploration Logs Sieve Analysis Atterberg Limits Earth Coru;ultants, lne. General GEOTECHNICAL ENGINEERING STUDY SOUTHWEST 43RD STREET AND OAKSDALE AVENUE SW RENTON. WASHINGTON E-3000-3 INTRODUCTION This report presents the results of the geotechnical engineering study completed by Earth Consultants, Inc. (ECI} for the proposed development on the northwest corner of the intersection between Southwest 43rd Street and Oaksdale Avenue Southwest in Renton, Washington. The general location of the site is shown on the Vicinity Map, Plate 1 . The purpose of this study was to explore the subsurface conditions at the site and based on the conditions encountered to develop geotechnical recommendations for the proposed site development. Project Description We understand the site is to be developed with several dock-high, tilt-up concrete warehouse buildings, with associated parking and driveway areas. These structures will range in size from approximately 7,000 to 170,000 square feet. The preliminary locations of the buildings are shown on Plate 2. We understand some raising of site grades will be required to achieve the dock-high floor elevations. At the time this report was written, design loads for the proposed structures were not available. However, based on our experience with similar structures, we anticipate wall loads will be in the range of three to five kips per lineal foot, and column loads will range between approximately seventy five (75) to one hundred twenty (120) kips. Floor loads for the warehouse and office areas will be in the range of three hundred fifty (350) and one hundred (100) pounds per square foot (psf), respectively. If any of the above design criteria are incorrect or change, we should be consulted to review the recommendations contained in this report. In any case, ECI should be retained to perform a general review of the final design. SITE CONDITIONS Surface The subject property is approximately 48.0 acres in si:ze, and is located northwest of the intersection of Oakesdale Avenue Southwest and Southwest 43rd Street in Renton, Washington (see Vicinity Map, Plate 1 ). The most significant topographic feature on the property is Springbrook Creek which approximately bisects the property in a southwest to northeast direction. With the exception of the Springbrook Creek channel, the topography of the property is relatively flat. The elevation of the Springbrook Creek stream channel ranges between approximately eight to ten feet below the elevation of the surrounding site. Earth Con11uftsnts, lnec. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page·2 Several abandpned one-and two-story structures are present on the site. These structures were associated with the agricultural and industrial operations previously performed on the property. An automobile wrecking yard and associated warehouse are still in operation at the northeast portion of the site. Several stockpiles of automobile waste (auto fluff) are located at the northwest corner of the site. Subsurface The site was explored by drilling four borings and excavating 21 test pits at the approximate locations shown on Plate 2. In addition, we previously performed five borings and six test pits for a preliminary geotechnical engineering study prepared for the site dated June 4, 1986. Please refer to the Boring and Test Pit Logs, Plates A2 through A38, for a more detailed description of the conditions encountered at each location explored. A description of the field exploration methods Is included in Appendix A. The following is a generalized description of the subsurface conditions encountered. The borings and test pits generally encountered ten ( 10) to twenty (20) feet of loose to medium dense, interbedded silt and silty sand. Varying amounts of fill were encountered in the explorations. The upper compressible materials are generally underlain by medium dense to dense silt, silty sand and poorly graded sand with varying amounts of silt. Expansive soils were not encountered on the site. Groundwater Groundwater was observed in all four borings while drilling at depths of ten ( 10) to twelve and one-half (12.5) feet below the existing ground surface. Groundwater was encountered in test pits TP-102, TP-108, TP-118 and TP-121 at depths ranging from eight (8) to fourteen (14) feet below existing grades. Groundwater conditions are not static; thus, one may expect fluctuations in groundwater conditions depending on the season, amount of rainfall, surface water runoff, and other factors. Generally, the water level is higher in the wetter winter months (typically October through May). Earth CoMultl!lnte. Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 Laboratory Testing E-3000-3 Page 3 Laboratory tests were conducted on several representative soil samples to verify or modify the field soil classification of the units encountered and to evaluate the general physical properties and engineering characteristics of the soils encountered. Visual classifications were supplemented by index tests, such as sieve analyses and Atterberg Limits on representative samples. Moisture contents were performed on all samples. The results of laboratory tests performed on specific samples are provided either at the appropriate sample depth on the individual boring log or on a separate data sheet contained in Appendix B. However, it is important to note that these test results may not accurately represent the overall in-situ soil conditions. Our geotechnical recommendations are based on our interpretation of these test results and their use in guiding our engineering judgement. Earth Consultants, Inc. {ECI) cannot be responsible -for the interpretation of these data by others. DISCUSSION AND RECOMMENDATIONS General In our opinion, the proposed buildings can be supported on conventional spread footings with slab-on-grade floors after the successful completion of a preload and/or surcharge program. A preload program involves placing the fill necessary to raise grades to the finish floor level and allowing the settlement induced by the fill to occur before construction of the building commences. A surcharge program involves placement of additional fill to elevations above the finish floor elevation and allowing settlement to occur. The purpose of the pretoad and surcharge programs is to reduce the amount of expected post-construction settlements from fill and static building loads. Based on the soil conditions and our experience with similar conditions, the estimated total post-construction settlements are in the range of one to one and one-half inches, after successful completion of a preload and/or surcharge program. In general, for this project, a preload program can be used provided the finish floor elevation is a minimum of two feet above the existing grades. A surcharge program will be necessary in areas were the existing grades are within two feet or less of the planned finish floor elevation. Specific surcharge recommendations for individual buildings can be made once building locations and finish floor elevations are available. Foundation elements should bear on a minimum of two feet of structural fill. Depending on grade modifications, this will require overexcavation of native soils. Slabs-on-grade should be supported on a minimum of one foot of imported granular structural fill, or one foot of cement treated on-site soil, or a combination thereof. Eerth Con1ulter1ts, lrte. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 4 We understand it is planned to utilize the on-site auto fluff as fill material after it is treated with cement .. OHM Remediation Services Corporation prepared a Draft Engineering Design Report dated August 1997 which provided site remediation recommendations. Included in this report are laboratory test results for unconfined compression strength tests performed on samples of the auto fluff mixed with various percentages of cement. The report indicates the fluff will be mixed with 7.5 percent cement for remediation purposes. Based on the unconfined compressive strength test results, in our opinion, the 7.5 percent cement/auto fluff mixture would provide a material suitable for use as structural fill. Specific geotechnical recommendations for use of the treated auto fluff will be presented in a supplemental report. This report has been prepared for specific application to this project only and in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area for the exclusive use of Zelman Development Company and their representatives. No warranty, expressed or implied, is made. This report, in its entirety, should be included in the project contract documents for the information of the contractor. Site Preparation and General Earthwork The building and pavement areas should be stripped and cleared of surface vegetation, organic material and other deleterious material. The root mat of the existing vegetation can be left in place in fill areas, provided a minimum of two feet and one and one-half feet of structural fill underlie foundations and pavements, respectively. The vegetation should be removed. Following the clearing operations, the fill placement should commence. The ground surface where structural fill, or slabs are to be placed should be proofrolled. Proofrolling should be performed under the observation of a representative of ECI. Soil in loose or soft areas, if recompacted and still excessively yielding, should be overexcavated and replaced with structural fill or crushed rock to a depth that will provide a stable base beneath the general structural fill, or will provide suitable support for slabs. A geotextile fabric could also be used to aid in stabilizing the subgrade. Structural fill is defined as compacted fill placed under buildings, roadways, slabs, pavements, or other load-bearing areas. Structural fill under floor slabs and footings should be placed in horizontal lifts not exceeding twelve {12) inches in loose thickness and compacted to a minimum of 90 percent of its maximum dry density determined in accordance with ASTM Test Designation D-1557-78 {Modified Proctor). The fill materials should be placed at or near the optimum moisture content. Fill under pavements and walks should also be placed in horizontal lifts and compacted to 90 percent of maximum density except for the top twelve (12) inches which should be compacted to 95 percent of maximum density. Eerth Con6ult.ents, 1ne. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 5 The existing site soils are moisture sensitive due to their relatively high fines content. As such, even after placement as structural fill, they will become disturbed from normal construction activity during or after periods of wet weather. Once disturbed, in a wet condition, they will be unsuitable for support of floor slabs and pavements. Therefore, the upper foot of subgrade should consist of a granular material suitable for use during wet weather or the upper foot of on-site fill soil could be cement treated. If the earthwork operations are conducted during the dry weather season as planned, it is our opinion that the on-site soils can be used as structural fill, including use as utility trench backfill. However, it must be emphasized that the native soils must be aerated in order to lower the moisture content to levels that will allow adequate compaction. Normal grading operations will provide some aeration; however, additional working of the soil will be necessary prior to or during grading in order to lower the moisture content to levels that will allow adequate compaction. If the on-site soil is exposed to moisture and cannot be adequately compacted then it may be necessary to use an imported free draining granular fill. Fill for this purpose and for use in wet weather should consist of a fairly well graded granular material having a maximum size of three inches and no more than 5 percent fines passing the No. 200 sieve based on the minus 3/4-inch fraction. Samples of materials proposed for use as structural fill during wet weather should be provided to us for testing in order to determine the suitability of the materials. Preload/Surcharge Program We estimate settlements of two to four inches could occur from the placement of dock high fills and buildings loads. In order to induce the majority of this settlement prior to construction, we recommend the use of a preload and/or surcharge program. We estimate the preload/surcharge would remain in place for a time period <>f four to six weeks. A preload program consists of placing structural fill to the finish floor elevation and allowing consolidation of the compressible soil beneath the buildings to occur prior to constructing the buildings. As mentioned previously, surcharge fills should be placed above finish floor elevations in areas where building pad grades will be raised less than two feet above existing site grades. We anticipate surcharges would be approximately two feet in height. More detailed surcharge recommendations can be made when finish floor elevations tor individual buildings have been established. In building areas where greater than two feet of fill is required to achieve finish floor elevations, a preload can be used. A surcharge program consists of placing structural fill to the finish floor elevation, and then placing additional fill above the finish floor elevation as a surcharge, and allowing consolidation of the compressible soil beneath the buildings to occur prior to constructing the buildings. Based on the soil condrtions and our experience with similar conditions, the estimated total post-construction settlements are in the range of one to one and one-half inches, after successful completion of a preload and/or surcharge program. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 6 The preload/surcharge fill should extend at least five feet beyond the building footprints. The side slopes of the fill should be sloped at a gradient of 1 H:1 V or flatter. If future expansion of any building is anticipated, the preload fill should extend at least twenty (20) feet in the direction of the future addition. The purpose of extending the surcharge is to reduce the possibility of settlement of the then-existing building from future building or surcharge loads. Because the purpose of the preload/surcharge is to induce settlement, it is necessary to monitor both the magnitude and rate of such settlement. To accomplish this, settlement markers should be installed within the building pads. The number of settlement markers placed will depend on the size of the building. As a general rule, one settlement marker should be placed for every 10,000 to 15,000 square feet of floor area. The settlement markers should be placed on the existing site subgrade before fill is placed. A typical settlement marker is depicted on Plate 3, Typical Settlement Marker Detail. Once installed, and while fill is being placed, the settlements caused by the filling operation should be recorded daily. For the first two weeks after the preload/surcharge fill is in place, readings should be acquired at two to three day intervals. Subsequently, readings may be obtained on a weekly basis, until either settlements cease, or the anticipated remaining settlements are within the previously specified settlement ranges. We should be retained to install the settlement markers and acquire the settlement readings. Should the readings be made by another organization, the measurements must be provided to us in a timely manner to allow for interpretation of the data. This will help avoid any misinterpretation or misunderstanding regarding the success of the preload/surchargeprogram. The settlement markers must be kept intact during earthwork.operations. In our experience, earthwork equipment (dozers and trucks) often destroy or damage markers. This adds to the project costs as the markers typically must be replaced and makes the settlement data obtained less reliable. In order to attempt to avoid this scenario, we recommend the project specifications include a requirement that the earthwork contractor is required to immediately replace any damaged settlement markers and have the settlement readings re-obtained at his own cost. This requirement makes the earthwork contractor more conscious of the importance of the preload/surcharge program and will aid in maintaining the integrity of the monitoring program. Fill tor landscaping purposes should not be placed near the building since additional fill could induce further settlements after the building is constructed. If such fill ls planned, the preload fill should be extended to five feet beyond the planned landscape fill, or a lightweight fill should be used. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 Foundations E-3000-3 Page 7 In our opinion, the proposed buildings can be supported on conventional spread and continuous footing foundations bearing on a minimum of two feet of structural fill after successful completion of the preload and/or surcharge program. Depending on grades it may be necessary to overexcavate the existing soil in order to provide the two feet of structural fill. If extremely soft soil is exposed in the foundation excavations, it may be necessary to extend the excavation to provide additional structural fill beneath foundations. Exterior footing should be bottomed at a minimum depth of eighteen (18) inches below the lowest outside grades. Interior footings may be bottomed at a depth of twelve I 12) inches below the top of the slab. Footings may be designed for an allowable bearing capacity of two thousand five hundred (2,500) pounds per square foot (psf). Loading of this magnitude would be provided with theoretical factor-of-safety in excess of three against actual shear failure. For short-term dynamic loading conditions, a one-third increase In the above allowable bearing capacities can be used. Continuous and individual spread footing should have minimum widths of eighteen (18) and twenty-four (24) inches, respectively. Lateral loads due to wind or seismic forces may be resisted by friction between the foundations and the supporting subgrade or by passive earth pressure on the buried portions of the foundations. For the latter, the foundations must be poured "neat" against the existing soil or backfilled with compacted fill meeting the requirements of structural fill. A coefficient of friction of 0.4 may be used between the foundation elements and the supporting subgrade. The passive resistance of native soil or structural fill may be assumed to be equal to the pressure exerted by a fluid having a unit weight of three hundred (300) pounds per cubic foot (pcf). These lateral resistance values are allowable values, a factor-of-safety of 1.5 has been included. As movement of the foundation element is required to mobilize full passive resistance, the passive resistance should be neglected if such movement is not acceptable. With structural loading as expected, total settlement in the range of one and one-half inches is anticipated with differential movement of about one inch. Most of the anticipated senlements should occur during construction as the dead loads are applied. Footing excavations should be observed by a representative of ECI, prior to placing forms or rebar, to verify that conditions are as anticipated in this report. E6rth Coni.uftants, Inc:. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 Retaining and Foundation Walls E-3000-3 Page 8 Retaining and foundation walls should be designed to resist lateral earth pressures imposed by the retained soils. Walls that are designed to yield can be designed to resist the lateral earth pressures imposed by an equivalent fluid with a unit weight of thirty-five (35) pcf. For walls that are restrained from free movement the equivalent fluid weight should be increased to fifty (50) pcf. These values are based on horizontal backfill and that surcharges due to backfill slopes, hydrostatic pressures, traffic, structural loads or other surcharge loads will not act on the wall. If such surcharges are to apply, they should be added to the above design lateral pressure. Calculation of lateral resistance should be based on the passive pressure and coefficient of friction design parameters given in the previous foundation section. If it is desired to include the effects of seismic loading in the design, a rectangular pressure distribution equal to six times the wall height should be added to the above lateral earth pressure values. Retaining walls should be backfilled with a free-draining material conforming to the WSDOT specification for gravel backfill for walls IWSDOT 9-03.12{2)). The free-draining material should extend at least eighteen (18) inches behind the wall. The remainder of the backfill should consist of structural fill. A perforated drain pipe should be placed at the base of the wall. Drain pipes should be surrounded by a free-draining soil that functions as a filter in order to reduce the potential for clogging. Drain pipes located in the free-draining backfill soil should be perforated with holes less than one-quarter inch in diameter. The drain pipe should be surrounded by a minimum of one cubic foot per lineal foot with three-eighths inch pea gravel. Alternatively, retaining wall drainage systems such as Miradrain could be used. If any such product is used, it should be installed in accordance with the manufacturer's specifications. Slab-on-Grade Floors Slabs-on-grade should be supported on a minimum of one foot of imported granular structural fill, or one foot of cement treated on-site soil, or a combination thereof. Cement treatment of the subgrade, if used, should consist of mixing a minimum of 8 percent cement by weight into the upper twelve inches of subgrade soil. Slab-on-grade floors supported on a minimum of one foot of imported granular structural fill, or one foot of cement treated on-site soil, or a combination thereof may be designed for a modulus of soil subgrade reaction of three hundred fifty (350) pounds per cubic inch (pci). Earth Ccnaultants, Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 9 Concrete slabs resting on soil ultimately may cause the moisture content of the underlying soils to rise.. This results from continued capillary rise and the ending of normal evapotranspiration. As concrete is permeable, moisture will eventually penetrate the slab resulting in a condition commonly known as a "wet slab", and poor adhesion of floor coverings may result. In our experience, these conditions rarely occur in dock-high, open air warehouses, except in areas were floor coverings are used. To minimize the potential for a wet slab, in areas where floor coverings will be used, suitable moisture protection measure should be used. Typically, such protection measures include placement of a vapor barrier and a capillary break. A capillary break, if used, should consist of a minimum of four inches of clean sand or washed rock. Samples of materials proposed for use as a capillary break should be submitted to us for review and/or testing prior to their use. Seismic Design Considerations The Puget Lowland is classified as a Seismic Zone 3 by the Uniform Building Code (UBC). The largest earthquakes in the Puget Lowland are widespread and have been subcrustal events, ranging in depth from thirty {30) to fifty-five (55) miles. Such deep events have exhibited no surface faulting. Structures are subject to damage from earthquakes due to direct or indirect action. Direct action is represented by shaking. Indirect action is represented by movement of the soil supporting foundations and is typified by ground failure (rupture), liquefaction, or slope failure. Liquefaction is a phenomenon in which soils lose all shear strength for short periods of time during an earthquake. The effects of liquefaction may be large total and/or differential settlement for structures with foundations founded in the liquefying soils. Groundshaking of sufficient duration results in the loss of grain to grain contact and rapid increase in pore water pressure, causing the soil to behave as a fluid for short periods of time. To have a potential for liquefaction, a soil must be cohesionless with a grain size distribution of a specified range (generally sands and silt); it must be loose to medium dense; it must be below the groundwater table; and It must be subject to sufficient magnitude and duration of groundshaking. Earth Consultan~. Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 10 Based on the information obtain from our borings, the loose soils encountered during our field exploration consist of interbedded silts and silty sands. Given this information, it is our opinion that the potential for widespread liquefaction over the site during a seismic event is low. Isolated areas may be subject to liquefaction; however, the effect on structures is anticipated to be minimal if the recommendations contained in this report are followed. Should liquefaction occur, the liquefying zones would be several feet below the footings of the buildings. We estimate liquefaction induced settlement would be in the range of two inches, which is slightly higher than the estimated post construction settlements (1.5 inches) discussed earlier. The UBC Earthquake regulations contain a static force procedure and a dynamic force procedure for design base shear calculations. Based on the encountered soil conditions, in our opinion a site coefficient of S 3 = 1 .5 should be used for the static force procedure as outlined In Section 1634 of the 1994 USC. For the dynamic force procedure outlined in Section 1629 of the 1994 UBC, the curve for Soft to Medium Clays and Sands (soil type 3) should be used for Figure 3, Normalized Response Spectra Shapes. Excavations and Slopes The following information is provided solely as a service to our client. Under no circumstances should this information be interpreted to mean that ECI is assuming responsibility for construction site safety or the contractor's activities; such responsibility is not being implied and should not be inferred. In no case should excavation slopes be greater than the limits specified in local, state and federal safety regulations. Based on the information obtained from our field exploration and laboratory testing, the soils expected to be exposed in excavations can be classified Type C as described in the current Occupational Safety and Health Administration (OSHA) regulations. Therefore, temporary cuts greater than four feet in height should be sloped at an inclination no steeper than 1.5H:1V or they should be shored. Shoring will help protect against slope or excavation collapse, and will provide protection to workmen in the excavation. If temporary shoring is required, we will be available to provide shoring design criteria, if requested. If slopes of this inclination. or flatter, cannot be constructed, temporary shoring may be necessary. Shoring wlll help protect against slope or excavation collapse, and will provide protection to workers in the excavation. If temporary shoring is required, we will be available to provide shoring design criteria. Eer1;h Cons1.1ln1nl$. Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 11 Permanent cut and fill slopes should be inclined no steeper than 2H:1 V. Cut slopes should be observed by ECI during excavation to verify that conditions are as anticipated. Supplementary recommendations can then be developed, if needed, to improve stability, including flattening of slopes or installation of surface or subsurface drains. In any case, water should not be allowed to flow uncontrolled over the top of any slopes. All permanently- exposed slopes should be seeded with an appropriate species of vegetation to reduce erosion and improve stability of the surficial layer of soil. Site Drainage The site must be graded such that surface water is directed off the site. Water must not be allowed to stand in any area where buildings, slabs or pavements are to be constructed. During construction, loose surfaces should be sealed at night by compacting the surface to reduce the potential for moisture infiltration into the soils. Final site grades must allow for drainage away from the bullding foundations. We suggest that the ground be sloped at a gradient of 3 percent for a distance of at least ten ( 10) feet away from the buildings, except in areas that are to be paved, which can be sloped at a gradient of 2 percent. If seepage is encountered in foundation or grade beam excavations during construction, the bottom of the excavation should be sloped to one or more shallow sump pits. The collected water can then be pumped from these pits to a positive and permanent discharge, such as a nearby storm drain. Depending on the magnitude of such seepage, it may also be necessary to interconnect the sump pits by a system of connector trenches. Foundation drains should be installed where landscaped areas are immediately adjacent to non dock-high portions the building. In our opinion, foundation drains are not necessary in areas where pavements extend to the building walls. The drains should be installed at or Just below the bottom of the footing, with a gradient sufficient to initiate flow. A typical detail is provided on Plate 4. Under no circumstances should roof downspout drain lines be connected to the foundation drain system. Roof downspouts must be separately tightlined to discharge. Cleanouts should be installed at strategic locations to allow for periodic maintenance of the foundation drain and downspout tightline systems. Elllrth Coruiultant&, Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 Pavement Areas E-3000-3 Page 12 The adequacy of site pavements is related in part to the condltion of the underlying subgrade. To provide a properly prepared subgrade for pavements, the subgrade should be treated and prepared as described in the Site Preparation and General Earthwork section of this report. At a minimum, the top twelve (12) Inches of the subgrade should consist of imported granular structural fill suitable for use during wet weather conditions, compacted to 95 percent of the maximum dry density (per ASTM D-1557-78). It is posslble that some localized areas of soft, wet or unstable subgrade may still exist after this process. Therefore, a greater thickness of structural fill or crushed rock may be needed to stabilize these localized areas. As an alternative to placement of a minimum of one foot of imported granular structural fill, consideration could be given to cement treating the subgrade soil. Specific recommendations for cement treatment can be provided upon request. The following pavement sections are suggested for lightly-loaded areas: • Two inches of asphalt concrete (AC) over four inches of crushed rock base (CRB) material, or • Two inches of AC over three inches of asphalt treated base (ATB) material. Heavier truck-traffic areas will require thicker sections depending upon site usage, pavement life and site traffic. As a general rule the following sections can be considered for truck- trafficked areas: • Three inches AC over six inches of CRB • Three inches of AC over four and one half inches of ATB Asphalt concrete (AC), asphalt treated base (A TB), and crushed rock base (CRB) materials should conform to WSDOT specifications. Rock base should be compacted to at least 95 percent of the ASTM D-1557-78 laboratory test standard. We suggest the use of Class B asphalt. Earth Cem1;uftanta. Inc. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 Utility Support and Backfill . E-3000-3 Page l3 The site soils should provide adequate support for utilities located above the groundwater table. The soil that is located below the groundwater table may not provide adequate support in their present condition. The inability of soils located below the groundwater table to adequately support utilities would result from both the loose condition of the soil and the effect of the groundwater table de-stabilizing the trench bottom as the trench is excavated. Thus, If utilities will be located below the groundwater table, remedial measures will likely be required in order to provide adequate support. Remedial measures could include dewatering the trench, using steel sheeting to create a barrier of flow to the groundwater or placement of quarry spalls in the bottom of the trench as it is excavated. Use of a geotextile to provide separation between the native soils and quarry spoils may also be necessary If heaving soils are encountered. Utility trench backfill is a primary concern in reducing the potential for settlement along utility alignments, particularly in pavement areas. It is important that each section of utility line be adequately supported in the bedding material. The material should be hand tamped to ensure support is provided around the pipe haunches. Fill should be carefully placed and hand tamped to about twelve inches above the crown of the pipe before any heavy compaction equipment is brought into use. The remainder of the trench backfill should be placed in lifts having a loose thickness of less than twelve ( 12) inches. A typical trench backfill section and compaction requirements for load supporting and non-load supporting areas is presented on Plate 5. Trench backfill beneath building, parking and roadway areas may consist of native soils or imported materials provided they are near optimum moisture content as determined by our field representative. Based on current conditions, the majority of the on-site soil would require aeration to reduce the moisture content to near the optimum to allow compaction. During wet weather, a granular fill, as described earlier, should be used. LIMITATIONS Our recommendations and conclusions are based on the site materials observed, selective laboratory testing and engineering analyses, the design information provided to us by you, and our experience and engineering judgement. The conclusions and recommendations are professional opinions derived in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area. No warranty is expressed or implied. GEOTECHNICAL ENGINEERING STUDY Zelman Development Company December 8, 1997 E-3000-3 Page 14 The recommendations submitted in this report are based upon the data obtained from the test pits. Soil and groundwater conditions between test pits may vary from those encountered. The nature arid extent of variations between our exploratory locations may not become evident until construction. If variations do appear, ECI should be requested to reevaluate the recommendations of this report and to modify or verify them in writing prior to proceeding with the construction. Additional Services As the geotechnical engineer of record, ECI should be retained to perform a general review of the final design and specifications to verify that the earthwork and foundation recommendations have been properly interpreted and implemented in the design and in the construction specifications. ECI should also be retained to provide geotechnical services during construction. This is to observe compliance with the design concepts, specifications or recommendations and to allow design changes in the event subsurface conditions differ from those anticipated prior to the start of construction. We do not accept responsibility for the performance of the foundation or earthwork unless we are retained to review the construction drawings and specifications, and to provide construction observation and testing services. Eerth Con•ultann. Inc. I r· Reference: King County I Map 41 By Thomas Brothers Maps Dated 1990 . ·,, ."•' ·-~-. ··~ --... :. --1---,-,..-,+.r."-":.:..""~· ··::;-~~-~·:..·-1. · ::~.t/ 1. ·.~it:: ~~rfl.·~1: ··-• }:·; ij· n ... y~,i': ·.,cf,,·_ .. · .. ·· ...•.. . ···•·•·· .•..• ·-~ > ~i . i ,,,,,. ..... f., 'fr:~~ ~i,. lWi• . . .. i,~.T-·'-'.··t-l-.,.a"'I .. ,.,..;;,v 71 ~ .., ~ :., .;.i}f < · .. __ ·1-~·" ··( .·.--.L, rnw ·, .. :·../J : .tr• -~ \ ·: ~ . ,, ·: '.") .·.·:q · .. ·: ~ .. ,., ''•flt. ': }1:i ' ' ft'i:i::l'i'.I d .( ::J_ r,_r __ ·-.·. \i . -~r··.•- -~2,~.£~!2~~.t~U.!~~.!~.~.; Vicinity Map Zelman Property Parcels A, B and C Renton, Washington Drwn. GLS Date Oct. '97 Pro). No. 3000-3 Checked RAC Date 10/28/97 Plate 1 1- TP--ti6~-"""-· ,1' " Rilirci8dTi:ack:II ~ +.;: +-rs= ~.,. ·~ ..---•-I •B-3 . tJ :~ C, [..-' -· 'TP-107 -·-TP-101' ' -•· TP-102' S.W. 43rd STREET ' -•-TP-1051 ~ "' w ::, z ~ ' e-s -o-TP•104 r -•· ' \I w l 'ij ~ ' ' ·•-TP-103' Note: Auto and Wire Fluff Areas Referenced from Site Operations Area \ Fig 1•2 OHM ProJ. No. 20004 By OHM Remediation Services Corp. Dated 8/5ft.¥7 -~~~.'!..~~- 0 Rf ~roxlmate Scale 0 100 200 400ft. !.EG!ilill B-1 ·*· Approximate Location of ECI Boring, Proj. No. E-3000-3, Oct. 1997 TP-101-ili-Approxlrnate Location of ' ECI Test Pit, Proj. No E-3000-3, Oct. 1997 G-101 .., ' S-1 ---r- TP-1 -[?- ~ f!,1"l l;:sJ D l---t ' ' I __ _J Approximate Location of ECI Grab Sample, Proj. No. E-3000-3, Oct. 1997 Approximate Location of ECI Boring, Proj, No. E-3000, May 1986 Approximate Location of ECI Test Pit, Proj. No. E-3000, May 1986 Auto Fluff Area Wire Fluff Area Proposed Building Existing Building Boring and Test Pit Location Plan Zelman Property Parcels A, B and C Renton, Washington ProJ Ne. 3000-3 I Drwa,, GLS Date Oct. '97 I Checked RAC I Date 10J30/!jl7 Plate 2 SCHEMATIC ONLY -NOT TO SCALE NOT A CONSTRUCllON DRAWING Surcharge or Preload Fill Surcharge or Preload Fill STANDARD NOTES 1) Base consists of 3/4 inch thick, 2 foot by 2 foot plywood with center drilled 5/8 inch diameter hole. 2) Bedding material, if required, should consist of Traction Sand. 3) Marker rod is 1 /2 Inch diameter steel rod threaded at both ends. 4) Marker rod Is attached to base by nut and washer on each side of base. 5) Protective sleeve surrounding marker rod should consist of 2 inch diameter plastic tubing. Sleeve is NOT attached to rod or base. 6) Additional sections of steel rod can be connected with threaded couplings. 7) Additional sections of plastic sleeve can be connected with press-flt plastic couplings. 8) Steel marker rod should extend at least 6 Inches above top of plastic sleeve. 9) Marker should extend at least 2 feet above top of fill surface. TYPICAL SETTLEMENT MARKER DETAIL Zelman Property Parcels A, B and C Renton, Washington Prof. No. 3000-3 Drwn. GLS Date Oct. '97 Checked RAC Date 10/30/97 Plate 3 . . . • C,.: .,• t;; • 0 0 o; it> o ........... .. 18 inch mln. 41nc Diameter w!;:rai~~:inage ~-·-···· .. • Q • 0 • • •• 0 • ' • , :ffln-/~4-ln_c_h_m_ax_. ~ ,,;:::~' :, ... •: • • _-. • • • • 0 LEGEND mm. SCHEMATIC ONLY -NOT TO SCALE NOT A CONSTRUCTION DRAWING 2 inch min. Surface seal; native soil or other low penneability material. Fine aggregate for Portland Cement Concrete; Section 9-03. 1 (2) of the WSDOT Specfflcatlons. Drain pipe; perforated or slotted rigid PVC pipe laid with perforations or slots facing down; tight jointed; with a positive gradient. Do not use flexible corrugated plastic pipe. Do not tie building downspout drains into footing lines. Wrap with Mirafi 140 Filter Fabric or equivalent TYPICAL FOOTING SUBDRAIN DETAIL Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-3 Drwn. GLS Date Oct. '97 Checked RAC Date 10/30/97 Plate 4 Non-Load Supporting Areas Floor Slab or Roadway Areas Varies 1 Foot Minimum Back!ITI Varies Bedding vanes Proj. No. 3000-3 Drwn. GLS LEGEND: Asphalt or Concrete Pavement or Concrete Floor Slab Base Material or Base Rock Backfill; Compacted On-Site Soll or Imported Select Fill Material as Described in the Site Preparation of the General Earthwork Section of the Attached Report Text. Minimum Percentage of Maximum Laboratory Dry Density as Determined by ASTM Test Method D 1557-78 (Modified Proctor), Unless Otheiwise Specified in the Attached Report Text. Bedding Material; Material Type Depends on Type of Pipe and laying Condttions. Bedding Should Conform to the Manufacturers Recommendations for the Type at Pipe Selected. TYPICAL UTILITY TRENCH FILL Zelman Property Parcels A, B and C Renton, ·Washington Date Oct. '97 Checked RAC Date 10/30/97 Plate 5 APPENDIX A FIELD EXPLORATION E-3000-3 Our field exploration was performed on October 20 and 23, 1997. Subsurface conditions at the site were explored by drilling four borings and 21 test pits. The borings were drilled by Associated Drilling and the test pits were excavated by Northwest Excavating, using a track- mounted excavator. Approximate exploration locations were determined relative to existing landmarks. Approximate locations should be considered accurate only to the degree implied by the method used. These approximate locations are shown on the Boring and Test Pit Location Plan, Plate 2. The locations of borings and test pits performed in 1986 are also shown on Plate 2. The field exploration was continuously monitored by an individual from our firm who classified the soils encountered and maintained a log of each test pit, obtained representative samples, measured groundwater levels, and observed pertinent site features. All samples were visually classified in accordance with the Unified Soil Classification System which is presented on Plate A 1, Legend. Logs of the borings and test pits are presented in the Appendix on Plates A2 through A38. The final logs represent our interpretations of the field logs and the results of the laboratory examination and tests of field samples. The stratification lines on the logs represent the approximate boundaries between soil types. In actuality, the transitions may be more gradual. Representative soil samples were placed in closed containers and returned to our laboratory for further examination and testing. Earth CQnsultimta. Inc. MAJOR DIVISIONS GRAPH SYMBOL TYPICAL DESCRIPTION Coarse Grained Soils More Than 50% Material Larger Than No.ioo Sieve Si:.e Frn, Grained Soils More Than 50% Matl!(lal Smaller lt-an No-200 Sieve Size C qu w p • pcf LL Pl Gravel And Gra\lEIIIY Sous More Than 50% Coarse Fracl10n Retained On No . .t. Siew Sand And Sandy Soil& More Than SO"!. coal'Se rraction Passing No. 4 Sieve 5111-s And Clays Silts And Clays Gravels With Finu ( appreciable aml)unt of lines l Sands With Fines ( apprec:lable amounl ol Jines I Uciufd limit leisa Than 50 Liquid Limit Greater Than 1-rtgtily Organic So1b. Fill Silt)' Gravels. Gravel-Sand - Silt Mixtures Cla)'&Y Gravels. Gtavel ~ Sand~ Clay Mixtures Silty Sands, Sand -Sitt Mixtures Cfayey Sands, Sand -Clay Mixtures Inorganic Slits & Very Fine Sands, Flock Flow ,Silty- Qayey Fine Sands;Clayey Slit$ 'NI Slight PIUtlclty IIIOrganic Clays: or Low To Medium P1asticlty. GraV!!'IIY Clays, Sanely Clays, ~Jty CfaY$, Lean Organl.c: Silis And OrgJniC Silly Clays Of t.ow P!asJlcity lnol'Q;l.nlc Sills, Micaceous Or Diatomaceous Fll"E: $and o, Silty Soils Inorganic Clays Of High PJU,icltY, Fal Clafli. Organic Clays 01 MedrUm lo High Plasticity' Orga.niC Sills Peat. Humus. Swamp Soils With High Organic con1e.n.&s Humus And Dull Layer Hi~y Vauiable Constl!uent.s The discussion in the text of tn1s n•port is necessary to, a p,ope, unde,standing Of the md\Jre of the material presented in the attached logs. DUAL SYMBOLS are used to Indicate borderUne aoif claaall'lcm:ion. TORVANE READING, tsf PENETROMETER READING, tsf MOISTURE, "' d,y weight SAMPLER PUSHED SAMPLE NOT RECOVERED DRY DENSITY, lbs. per cubic ft. uaum uMrr, % PLAST1CINllEX I l!' O.D. SPLIT SPOON SAMPLER j[ 24" I.D. RING OR SHELBY TUBE SAMPLER I WATER OBSERVATION WELL lZ DEPTH OF ENCOUNTERED GROUNDWATER DURING EXCAVATION ,: SUBSEQUENT GROUNDWATER l.EIIEl. W/ DATE LEGEND Proj. No.3000-3 Date Nov. '97 Plate Al .... .. ' ... ' M "' .. "' "' ..J "' Boring Log Project Name: I Sheet Of . Zelman Pron rtv Parcels A, B and C 1 2 Job No. Logged by: Start Date: Completlon Date: Boring No.: 3(1@;3 RAC 10/23/97 10/23/97 B-1 Drilling Contaotor. Drllllng Method: SampRng Method: Associated HSA SPT Ground Surface Elevation: Hole Compl~tion: ±24' 0 MonltorinQ Well 0 Piezometer IXJ Abandoned sealed with bentonlte 0 -• -Surface Conditions: No. -0 .c " 0 w .c Jl + Blows .. u .D ... .. + • "' • (%) Ft. . :,, • lL • ::, ,, ,;. "' Q ., ., ><;><; . 1--SM f};tfsoil to 4'~ __ • Gray sU fine SANO, loose, wet, considerable wood, plastic, ~ 1 1--glass debris, some slag >i: r-- 2 1-- ;;: . ,__ ij 3 ,_,_ 7.4 59 ~ ,__ -through debris at 3.5' to 4.0' , ... 4 SM Brown silty fine to medium SAND with gravel, medium dense, wet ::; ;; . 1-- ' ,,. LL•35PL=29 5 >-- Pl=6 -f--6" coarse sand lense 12.9 18 6 --,_,_ 7 ML Gray SILT, loose, saturated -- 8 --40.0 5 -- 9 --- 10 ---increasing sand and sandy slit, very lose, groundwater teble --encountered 39.7 2 11 -- f-- 12 ,__ ·-- 13 26.1 8 ir-, ,P-SI Blacl poorly graded fine to medium SAND, loose, water bearing ~~ . ,..- ~4 14 >-- tm~ . ,__ ~1 15 ---increasing silt, some silty sand ··:,; ;'t .f-.f- 11.0 11 18 ,__ .. ,__ xi~ d: .__ ~Ji/· 17 l! i/i ·>-- .· 18 f-- f-- }'lf" ' 19 f-- •f-- \ .. -~~~!~!!~- Boring Log Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-3 Own. Gl.S Date Nov. '97 Checked RAC Date 11/3/97 I Plate A2 Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineenng tests, analysis and judgment. They are not necessarily representative of other times and looatioM. We cannot aocept responstbllity for the use or interpretmton by othen;; of Information presented on thfs log, .. .. ' :: Boring Log Project Name: Zelman Pro BandC Sheet 2 Of 2 Job No. 3000-3 Logged by: Start Date: 10 23 97 Complatlon Date: 10 23 7 Boring No.: RAC DriHing Contaetor: Associated Ground SUrface 8&vation: ±24' . w No. Blows (%) A. 10 25.0 12 58.8 4 0 - -0 .c .0 a. e . " Ii, .. ,: +-...... ... C • Df!Jffng Method: HSA Hole Completion: 0 Mcnltorin Well -Ill 0 IL U .0 e ,. • • ::, > Ill Ill D Plezometer ML Gra SILT, loose saturated B-1 Sampling Method: SPT 00 Abandoned, sealed wiU, bernonlte 1,ll~21 -l-'+-:-M""L+""G'ra_y_S=cla-cLT"',.,.loo-se-,-sa--,-tu-rat---,-ed-,--------------1 " '" ""' 22 PT PEAT layer and organic slit 23 1---k,,..,d-~B""la-ck-,-p-o-o"""'rl,...y_g_ra_d,..ed--,-,ll'"'n-e7to_m_ed~iu-m-_,sAN==o---c, l'oo-se_to,_m-ed"""l""u_m_d~e-n-se-.---4 water bearing 24 25 26 27 28 29 -10% fines 30 f--r+:-:-:-:+-::-----,---;-;--:;:,=--:---;---:::--;:--:----,:-;--:--c:-;--;-,-,----1 MH Brown elastic SILT and organic sfft, soft, saturated, lnterbedded organic fragments 31 Boring terminated at 31.5 feet below exlsting grade. Groundwater table encountered at 10.0 feet during drilling. Boring backfilled with cuttings and bentonlte . :!;1-----.._ _ _.___ ...... _ _,'---'--'--'-----,-----------------------1 Boring Log Zelman Property Parcels A, B and C Renton, Washington U: Proj. No. 3000~ Own. GLS Date Nov. '97 Checked RAC Date 11/3/97 Plate A3 Subsurface canditions. depicted repteSent out observation& a; the time and location of this exploratory hole, modified by engineering tests.. analysis and judgment. They are not necessarUy representative of other times and locations. We cannot accept responsibiilty for the use or interpretation by othera of information presented on this log. ,._ .. ' .. ' " Ol "' .. " --' al Boring Log Project Namij: I Sheet of. Zelman Prooertv Parcels A B and C 1 2 Job No. Logged by: Start Date: ComplaUon Date: Boring No.: 3000-3 RAC 10/23/97 10/23/97 B-2 Dr1111ng Contactor: Drilling Method: Sampling Melhod: Associated HSA SPT Ground Surface Bavation: Hole COmplation: ±23' 0 Monitorlno Well D Piezometer IX] Abandoned, soeled wllh bentonlte " -r. • -Surface Conditions: No. -Q -f/1 0 w r. Jl .. 0. 0 .Q Blows 0. • 0. +-E "' e (%) Fl . :,, ... • ::, :,, Ji f/1 0 "' u, ~ -SM AU.: ~rown sK% SAND with gravel, loose, moist . -contains organ s 1 >----becomes gray, no apparent organics - @ 2 --- 13.3 3 SM ALL: Brown to black sUty SAND, medium dense, moist 1Q ---contains organic debris 4 ---copper wire i~ - 5 ----34.4 10 6 ---- I Q'S 7 --- 8 ---no recovery 10 ---cuttings same as at 5' 9 -- ~] - 10 -LL=37 PL=31 Pl=B 43.5 8 ML Gray SILT, loose, saturated (native) 11 ---contains organics -- 12 1---- 13 ---trace sand 41.5 5 -~- 14 -~ -15 ,__ -becomes very loose .,... ,--contains peat lnterbeds 44.3 2 16 --,__ 17 1-- •I-- 18 -- 19 - ·I-- -Earth Consultants Inc. Boring Log Zelman Property Parcels A, B and C ~~~A~SC:lentl!U Renton, Washington Proj. No. 3000·3 Own. GLS Date Nov. '97 Checked RAC Dalo 11/3/97 I Plate M Subsurface conditions d'eptcted represent our observations at tho tlme and location of this exploratory hale, modified by engineering tests 1 analysis and judgment. They are not necessarUv representative of other times and locations. We cannot accept. responslbllity for th& use or intetpretatton by others of informatlon presented on this log. ,.. .. ' .. ' ~ ~ M .. .. .. M -' Ill Boring Log Project Name: I Shoot of Zelman ?rooertv Parcels A. B and C 2 2 Job No. Logged by: Start Date: Completion Date: Bering No.: 3000.(l RAC 10/23/97 10/23/97 8-2 DrUUng Contactor: Drilling Method: Sampling Method: Associated HSA SPT Ground Surtace Elevation: Hole Completion: ±23' 0 Mortltorinn Well D Plezometer 00 Abandoned. seeted with bentonite u -,:; • -w No. :;: 0 .... -" 0 Blows .. .a .. + .. u .<I (%) • • ... • " . Fl. L :,, • ::, " .. " C "' .. w ML Grav SILT, loose, saturated . 84.4 8 PT Layer of PEAT and organic snt fl~~ 21 -- :::· .. , 22 '--SM Gray silty SAND, medium dense, saturated '-- 23 '--' ~ /: 24 '--..__ 25 1-- [ , ~~ 29.8 16 i· ?i 25 '-'-, Boring terminated at 26.5 feet below existing irade. Groundwater table encountered at 10.0 feet during drilling. oring backlnled with cuttings and bentonlte. -Earth Consultants Inc. Boring Log Zelman Property Parcels A. B and C ~~~ .. ~Sdo112sts Renton, Washington Ptoj. No. 3000-3 Dwn. GLS Date Nov. '97 Checked RAC Date 11/3/97 f Plate A5 Subsurface 1;:0ndltions depicted reptBsent cur observation$ at the time and location of this exPio,atory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of Qthe, times and jQcat{ons. We cannot accept responsibllity for the use or interpretation by others of information preeented on thi!3. log. Boring Log Project Name: Zelman Pro Job No. 3000-3 Drilling Contactor. Associated Parcels A, B and C Logged by: RAC Slart Date: 10 23 97 Dn16ng Method: HSA Hole Completion: Completion Date: 10 23 97 Boring No.: B-3 Sampling Method: SPT Sheet 1 of 2 Ground Surface B~on: ±24' D Monitarln Well 0 Piezometer 00 Abandoned, sealed wtth bentanlte " .. ' .. w No. Blows (%) R. 33.3 11 35.3 7 16.3 16 15.6 13 30.8 6 44.7 10 0 - :;; a .. .a • • L > .... .c ... ..... .... C • -.. 0 .. 0 " S (I) E • ::, > .. " SM Surlace Conditions: /4" Topsoil) FILL Brown silty SANO with gravel, loose, moist 21-+~c-4-~-------~=-~-~------------1 ML Mottled brown and gray SILT, medium dense, moist 3 4 5 6 7 8 9 10 11 13 14 15 18 17 18 19 -trace fine sands -contains small roots -becomes loose SM Mottled brown and gray silty fine SAND, medium dense, moist SM Gray silty fine SAND, loose, saturated -increase in silt content -30% fines -contains large (4') pieces of wood -becomes medium dense ' ~1------'---'--....W ~ -Earth Consultants Inc. g ~~~·~~ t'1 Boring Log Zelman Property Parcels A, B and C Renton, Washington .l ProJ. No. 3000-3 Dwn. GLS Date Nov. '97 Checked RAC Date 11 /3/97 Plate AS SUbsurface conditions depicted represent our observations at the time and location of this explofatory hole, modified by engtneerlng tests, analysjs and judgment. They are not necessarily representative of other limes and Joca1ions. We cannot accept responsibifity for the use or Interpretation by ethers of Information presente<t on this log. .... ,,. ' ~ Boring Log Project Name: Zelman Pro e Parcels A. B and C Job No. 3000--3 logged by: RAC Orlling Contaotor: Associated Ground Surf.ace Elavai.tion; ±24' w No. Blows (%) Ft 26.S 28 45.8 14 ~-.c 0 .. ,, • • L :,, .. " .c • +-.. +-~ • h. • " • " Start Date: 10 23 97 OriHing Method: HSA Complettoo Date: 10 23 97 Boring No.: B-3 SampHng Melhod: SPT Sheet 2 of 2 Hole Completion: 0 Monitorin Well D Piezomater 00 Abandoned, sealed with bentonlte -" 0 0 .n " • :, " " Black poorly graded SAND with silt. medium dense, saturated -sand Is fine to medium grained -contains large piece of wood ~no recovery Boring terminated at 31.5 feet below existing grade. Groundwater table encountered at 12.5 feet during drilling. Boring backfUled with cuttings and bentonite . ~1-----.L._.J..._-1._......Jl-.J.........J __ L_ ____ r----------------------l Boring Log Zelman Property Parcels A, B and C Renton, Washington ;;I Proj. No. 3000--3 Own. GLS Date Nov. '97 Checked RAC Date 11/3/97 Plate A7 Subsurtace conditions depleted represent our observatlans at the time and IQC:ation of this explorata,y hole, modified by engineering tests, analysis and Judgment. Thay are not necessarily rE!p,esentative ot other times and locations. We cannot aoeept responsibility for the uw or interpre1atlon by others of iofo,mation p,e$ented on th!S log. ... .. ' " ' Boring Log Projeet Name: ZelmanPro e Parcels A, B and C Sheet 1 of 2 Job No. 30()()-3 Logged by: RAC Drilling Contactor: Associated Ground Surface Ele1JatJon: ±24' w No. Blows (%) Ft. 15.7 12 6.6 11 9.9 g 18.8 7 33.3 7 30.0 8 a - -0 .r:: .a .. . . " iii " .r:: • .. .... .. E • IL • 0 " 1 2 3 4 Start Dato: 10 23 97 OrUlfng Method: HSA Hole Completlon: 0 Monttorin Woll C.Ompletlon Date: 10 23 97 D Piezometer - " 0 u .a Surface Conditions: o, E :, :,, Ill Boring No.: B-4 SampUng Method: SPT 00 Abandoned, sealed with bentonite GM All.: Sil GRAVEL, medium dense, moist ML Brown SILT with fine sand, medium dense, moist 5h-!---1------------==-------------f SM Mottled brown and gray fine SAND, medium dense, moist 6 7 8 9 10 11 12 13 14 -37% fines -becomes loose SM Gray silty line SAND, loose, saturated· 151--.--1----1----------------------------e SM Black silty fine to medium SAND, loose, saturated 16 -14% fines 17 18 19 :::1-----.L-..L. _ _£1 Boring Log Zelman Property Parcels A, B and C Renton, Washington j;l Proj. No. 3000-3 Own. GLS Date Nov.'97 Cheel<&d RAC Date 11 /3/97 Plate AS Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modified by engineering tests, analysis and judgment. They ate not necessarily representative of other times and locations. Wet cannot aoeept 1asponslbillty for the use or interpretation by others of information presented on this Jog. ... 0- ' .. ' -- "' .. .. .. M .J .. Boring Log Project Name: I Sheet of Zelman Pro=rtv Parcels A. B and C 2 2 Job No. I logged by: Start Date: I Completion Date: Boring No.: 3000-3 RAC 10/23/97 10/23/97 8-4 Drilling Contaotoc. DrUIJng Method: Sampling Method: Associated HSA $PT Ground Surface Sevation: Hole Completion: ±24' 0 Monitorino Well 0 Piezometer [j) Abandoned, sealed wlth bentonile o_ J: • -w No. :i: 0 ... -(I) 0 Blows .. .,, ..... .. (J .!I (%) • • ... • ., . Ft. L :,, C • :, "' "'(I) .. (I) I SP-$1 Black poorly graded SAND wtth sUt, medium dense, saturated >->--sand 1s fine to medium grained .26.9 22 ·. 21 >-- . Boring terminated at 21.5 feet below existing irade. GroundWater table encountered at 12.5 feet during drilling. oring backfilled with cuttings and bentonite . -Earth Consultants Inc. Boring Log Zelman Property Parcels A, B and C ~~~ .. ~scsentl9t9 Renton, Washington Pro). No. 3000-3 I 0wn. GLS Oe .. Nov.'97 0,ec:1:ed RAC Date 11/3/97 I Plate A9 Subsurface conditions depicted ,epresent our observations at the time and location of lh,s exploratory hote, modified by engmeenng test$, analysis and jl.ldgment. They are not necessarily representative of other times and locations. We cannot accept responsibility for the use or intetpu1taUon by otheri of information presented on this log. ... .. ' V ' " " M " " .. M .J .. ... Test Pit Log Project Name: I Sht of Zelman Prot>ertv Parcels ,,. B and C 1 Job No. Logged by: I Oat0: Test Pit No.: 300()-3 DSL 10/20/97 TP-101 Excavation Contaclor: Ground Surlace 8evation: N.W. Excavatlno Notes: u -• Surface Condltions; Grass -0 .c "' Q w .c .., .... .. u " (%) 0. E .... e "' . . ,, 0 LL d :::, :, J; "' Q "' "' -SM Fili.: Brown silty SAND with gravel, medium dense, moist 20.0 1-- 2-- a~ ....... 4- ·r-- 5 ML Gray sandy SILT, medium dense, moist r-- 22.1 5..--.,..,.... 71---mottlings from 5' 1-- s~ •r-- 9~ ......... 10 r--21.6 r-- 11 ,__ ·- 12 1--- 13 - ·- 14 Test pit terminated at 14.0 feet below existing grade. No groundwater encountered during excavation . -Earth Consultants Inc. Test Pit Log Zelman Property Parcels A, B and C ~~~t.,~SClentt!D Renton, Washington Proj. No. 3000-3 I 0wn. GLS Date Nov. '97 Checi<ed RAC Dato 11/3/97 I Plate A10 Subsurface conditions depicted represent our observations at the lime and location of this exploratory hole, modifl&d by englneel'ing tests, analys!s and judgment. Tuey "'9 not necessarily representative of other lim8$ end locations. We cannot acoept respon&ibTHty for the use or interpretation by ottiers. of Information J)(&Sented on this log. ,... .. ' .., ' ~ .J Test Pit Log Project Name: Zelman Pro e Parcels A S and C Job No. 300()..3 Logged by: DSL Excavation Contactor: N.W. Excavatin Notes: 0 :;:; 0 L w .. Jl .. .... ('4) • e ... L :, 0 <!) .. 5.5 2 • --.. D .. " Jl • " • • :, :, .. .. SM Date: 10 20 97 Test Pit No.: TP-102 Sheet 1 Ground Surface Seva.tion: Surface Conditions: Grass FILL: Brown silty SANO with gravel, dense, moist -plastic of 1 a 1--1--S~M,..,..i--(2-'-sod-)-----------------------1 Brown silty SAND, medium dense, moist 27.8 70.5 4 5 6 7 8 9 10 11 12 -sloughing in sides -fines content decreases -slow Inflow of groundwater Test It terminated at 13.5 feet below existing grade. Groundwater table encountered at 13.0 feet during excavation. Test Pit Log Zelman Property Parcels A, B and C Renton, Washington ~ Pro]. No. 3000-3 Own. GLS Data Nov.'97 Chocked RAC Do.ta 11 /3/97 Plate A11 Subsurtace conditions depicted reptesent our obseMl.tlons at \he time and location of this exofcnatory hole1 modified by engineeflng tests, analysis and judgrnent. They are not necessanly reptesentative of other timeia and locatloos. We cannot accept responS1billty for the use or Interpretation Oy others of information presented on this log. Test Pit log Project Name: Zelman Pro Job No. 3000-3 E>ccavation Contactor: N.W. Excavati Notes: u -.c +-• a. ... • u. 0 . --.. 0 .. 0 Jl . " . • ::, > "' .. Date: 10 20 97 Surface Conditions: Grass Test Pit No.; TP-103 Sheet 1 Ground &irtace BevatiOfl: of 1 w :c j (%) 1 i :. .. i-----t---t cr1-.--t--;:;S:;,M;-t--;:B:-:ro=w=n:-::;sil;;:ty=s'-"A::;N:;;D~.-:-1o=ose=710=-=med=1=um=-=d:-:e-=n=se:-,-::mo=1st::----------; " ~ .. ' ~ 12.9 32.3 40.9 2 4 5 6 7 8 9 10 11 12 13 14 ML Brown SILT, medium dense, moist SM Gray silty fine SAND, loose to medium dense, moist -becomes dense -becomes wet -6' diameter log 15 161----t----i--:,------c-,-----,-----,----,-"C"CC-=-c-..,.-.,.....-...,.-,.,----,--.,.,-----------l T est pa terminated at 16.0 feet below existing grade. No groundwater encountered during excavation. ~t-------~-~-~~-~-------,,------------------------l Test Pit Log Zelman Property Parcels A, B and C Renton, Washington .,t-------"T"-------,--------11-------,--------...-------I l: ProJ. No. 3000-3 Own. GLS Dale Nov. '97 Checked RAC Date 11/3/97 Plate A12 Subsurla.oo cond[tlons depicted represent our observatlons at the time and loca.Uon of this exploratory hole, modified by engineering te.stt., analysis arid jodgment. They are not necessarily representative of other times and location$. We cannot accept fes.ponsibClity for the use or interpfetation by others of Information presented on this log. " .. ' .. ' ~ ~ I') " .. " I') -' a. ... Test Pit Log Project Name: I Sheet of Zelman Pronertv Parcels A B and C 1 1 JobNa. T l..cgged by: I Oale: Test Ptt Noc 3000-3 OSL 10120/97 TP-104 Excavation Contactor: Ground Surface E!evation: N.W. Excavatlnn Notes: 0 -• -Surfaee Conditions: Grass -0 ..r:. -., 0 w .t: .a .. a. 0 .a a. e .... e Ill e (%) • :> . ... • :, :> .; ., 0 ., ., ' '--SM ALI.: Dark brown/gray sHty SAND with gravel, medium dense to dense, moist 16.6 1---concrete debris 2- ~ ~ a- '-- 4~ - 5 ML Brown SILT, medium dense, moist '--34.1 a~ '-- 7 '---12' diameter log '-- a~ '---becomes dense 25.S 9 '-- '-- 10 '-- ·'-- 11 Test pit terminated at 11.0 feet below existing grade. No groundwater encountered during excavation. -~~~!~!1~- Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Proi No. 3000-3 I 0wn. GLS Date Nov. '97 Olecked RAC Date 11/3/97 I Plate A13 Subsurface conclitloni. deiiiO'ted repreaent our oburvauons at toe time and location of this ilXPloratOJY hole, modified by engineering telils, analysis and judgment. Thay are not necessartty representative of other times aod locations. We cannot aocept respon.slbltity fer the use or interpretattan by others of information presented cm this log. " .. ' ~ ' ~ Test Pit Log Project Name: Zelman Pro e Parcels A B and C Sheet 1 of 1 Job No. 3000-3 Logged by: Date: Teot Pit No.: TP-105 DSL Excavation Contact«: N.W. Excavatln Notes: 0 - w -0 .c: .<I ._ e (%) • JI cl;"' 23.4 21.8 11.4 10 20 97 Ground Surface Eleva.Uon: .c: • .. -"' 0 .. 0 Jl .... e "' e 0 II. a • ::, "' "' .. Surface Condi1lons: Grass SM ALI.: Brown silly SAND with gravel, dense, moist 2 3 -4• layer of sod 41--1----4-----'"------------------------........f SM Brown silty SAND, dense, moist 5 6 7 8 g 10 11 -decrease in fines content 12f---+----+-'"""--,-----,----,---,--,,.,,--c-c--~~----c-~----c-----1 Test pit terminated al 12.0 feet below existing grade. No groundwater encountered during excavation. ~1-----'---'---'--'-...J...--'-------~----------------------1 Test Pit Log Zelman Property Parcels A, B and C Renton, Washington .J ~ Pro1.No. 3000-3 Own. GLS Dato Nov. '97 Checked RAC Date 11/3/97 Plate A14 Subsurface conditions depicted represen1 our observations at the time and looation of this e)tploratory hole, modHfed by eogtneering tests, analysis and judgment. They are not necessarily repre&entalive of other times and locatiOffli. We cannot accept responsibility for the use or interpretetion by others of information p<esented on this log. " .. ' ... ' ~ .., .. .. .. I"! .J .. .. Test Pit Log Project Name: I Sheet of Zelman Prooertv Parcels A BandC 1 1 Job No. I logged by, I Date: Test Pit No.: 3000-3 DSL 10/20/97 TP-106 Excavation Conta.ctcr: Ground Surface Erevation: N.W. Excavatlna Notes: o_ G -Surtace Conditions: Grass -D " -Ill D w " .0 ... .. 0 /J a. e .... 6 Ill & ('I,} • ll . ... • :, ,. .; "' " "' (I) a -SM All.: Brown silty SAND with gravel, medium dense. moist 23.7m 1- 21-ML Brown SILT/ sandy SILT, medium dense, moist ·- a- -·--becomes gray 4--roots (4'-6" diameter) - 00.4 5-·-s- ·I-- 7- I- 8>---91---decrease in fines +-- 21.0 10 I--11 I- ·I- 12 I- •I- 13 Test pit terminated at 13.0 feet below existing grade. No groundwater encountered during excavation. -~!!~~!~~· Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-3 Own . GLS Date Nov. '97 Checi<od RAC Data 11/3/97 I Plate A15 Subsurface conditions depicted represent our obsesvaUons at the time and lor:a:tion of thls exploratory hole, modified by engineering tests, analysis and judgment. They are not necessarily representative of other times and looatlons. We cannot accept responsibility for the use o, Interpretation by othM of information presented on this log. ,.. 0-, ~ - Test Pit Log Project Name: Zelman Pro e Parcels A B and C Sheet 1 of Job No. 3000"'3 Logged by: Date: Test Pit No.: DSL Excavation Contactor. N.W. Excavatin Notes: 0 - -0 w .c ... (%) a. E • :a .\; Ill 10 20 97 TP-107 Ground Surface Elevation: .c • -"' 0 .. a. u ii .... e "' E .... • ::, :a C " "' Surface Conditions: Grass SM AU.: Brown silty SAND with gravel 21-4---4------------------------------I ML Gray brown mottled SILT, medium dense, moist 31--+-=-+-~--~~~==-~~-,---'7C------------1 SM Brown silty fine SANO, medium dense, moist 4 5 6 7 8 9 10 11 12 13 14 -sit content decrease 151---l----l----------------,--.,----,..,---------1 Test pit terminated at 15.0 feet below existing grade. No groundwater encountered during excavation. -·i-----..L.--L--1-..l--1--'-------~---------------------1 ..J Test Pit Log Zelman Property Parcels A, B and C Renton, Washington ~ Proj. No. 3000-3 Own. GLS Date Nov. '97 Checked RAC Date 11/3/97 Plate A16 Sub.surface conditions depleted represent our observatiOns at the t1me and location of this exploratory ho[e1 modified by engineering tests, ~ and Judgment They are not necessarily representative of othet ttmes and locatfons. We cannot accept responsibility for the use or inte,pretation by others of informatton pre&ented on this log. " .. ' .. ' ~ Test Pit Log Proj<>ct Name: Zelman Pro Job No. 3000-3 Excavatfon Contactor: N.W. Excavatin Notes: w (%) 45.8 27.8 36.1 u - -0 .c: .0 o. e . :,, .l; ., • -.c: -., 0 +-.. 0 .0 .. +-e ., e D IL • ::, :,, C " "' ML 2 Date: 10 20 97 Surfaoe Conditions: Grass Test Pit No.: TP-108 Sheet 1 Ground Surface Elevation: Brown sandy SILT, medium dense, moist of 1 3 f-+.S"M.+-G,_..-ra'd.ce-s -:-to"""'bccr--:o:-:w=n--=s"Hty=S"AN=o"'.-m'""e-d"'lu"'m-:-d,-eccn,-se:-,-m'""o,.,is""'t,------------1 4 5 6 7 8 9 10 11 12 13 14 -decrease in fines content -becomes wet -caving -slit lenses, extremely slow in flow 1sf-+---l---cc=--r-,-----.,..-,--,;-,-...,.-c,--,-,,--_.,....._..,....,..----c---,,----,----,--,-----l Test pit terminated at 15.0 feet below existing grade. Groundwater table encountered at 14.0 feet during excavation. ~ ...... ____ .,_ _ _,_ _ _,__.,__,_ _ _, ______ -ir----------------------l M .. .. .. .., ~ Earth Consultants Inc. ~ ~~~~~Sdentl$$ Test Pit Log Zelman Property Parcels A. B and C Renton, Washington .,1-------.--------,--------t-------T""---------,-------1 e; ProJ. No. 300~ Own. GLS Oat• Nov. '97 Checked RAC Dato 11/3/97 Plato A17 Subsurface conditions depicted represent our observations at the time and location of this exploratory hole, modlfled by &nglneertng tests, analysis and .it:fdgment. They are not necessarily repr8$8ntative of other times and locations. We cannot accept respoos.ibHity for the use or lnterprelatJon by others of lntonnation presented on this: log. " .. ' " ' ~ Test Pit Log Ptoject Name: Zelman Pro Parcels A, B and C Sheet 1 of 1 Job No. 3000-3 Logged by: Oaie: Test Pit No.: DSL Excavation Contac:tor: N.W. Excavatln Nctes: 0 -w .c 0 .. "' {%) • • L :,, .. (/) 15.3 LL=36 PL•28 33.4 Pl•8 29.2 30.7 .t: .. .... • IL " 2 3 4 5 • -n. • • "' (/) 0 u"' (I) • :, :> .. SM Ml 10 20 97 TP-109 Ground Surface Seva.tlon: Surlace Conditions: Brush ALL: Brown silty SAND with gravel, loose to medium dense, moist .powdered brick, metal Gray sandy SILT, loose to medium dense sl-+=+-=-,------,,--==--::---:----,-,----------l SM Grades to gray silty SAND, medium dense, moist 7 a g 10 11 12 13 14- -caving ·becomes wet and mottled 151----+----f-~----------,---------,.,----------1 T est pit terminated at 15.0 feet below existing grade. No groundwater encountered during excavation. ~-1-------'---l..--'--"'-...J.-......JL.....------,----------------------l Test Pit Log Zelman Property Parcels A, B and C Renton, Washington ..,,t--------,--------.-------1--------.--------.------1 i: ProJ. No. 3000-3 Dwn. GLS Date Nov. '97 Checi<ed RAC Date 11 /3 97 Plate A18 Sub8urface conditions depicted represent our ohservations at the time and location of thla exploratory hote, modified by engineering tests, ana.1)'$is and Judgment. They are not necessarily ,epresentative of other times and looaUons. We cannot accept responslblUty for 1he use or interpretation by others of fnforma1lon presented on this tog. • I' "' " .. " ~ Test Pit Log Ptojoct Name: Zelman Pro BandC Sheet 1 Of 1 Job No, 3000-3 Logoedby: Date: Test Pit No.: OSL Excavation Contactoc. N.W. l::xcavatln Notes: " -w :i: 0 ~ .c (%) -e L :,, .... 31.5 27.9 25.0 10 20 97 TP-110 Ground Surface Elevation: .c • - + "' 0 " " J) ..... • .. • 0 ... • "' :,, 0 "' ., Surlac<> Condmons: Brush ML Brown sandy SILT, loose to medium dense, moist 2 41--+-=cc-:-i--=--:-----:::---::::-==---,,----,----;-:-----------i SM Grades to gray sUty $AND, medium dense, moist 5 6 7 8 9 10 11 12 13 -decrease in fines content -becomes wet -caving 141--+---;-~~-::-:----c---c--;--:-.,.,--:,-:,---:-:---:---...,.-.,,---.,---:-,-----,:--.,...------1 Test pit terminated at 14.0 feet below existing grade. No groundWater encountered during excavation. "·t-____ .._ _ _._ _ _._..__. __ ...__ ______ ~---------------------i .., -Test Pit Log * ~~~}~~!1,.S:· Zelman Property Parcels A, Band C • :1-------,--------,--------1-------,R_e_n_ton_,_w_a_s_h_in_gt_on_.,... _____ ; ,.. Proj. No. 3000-3 own. GLS Date Nov. '97 Checked RAC Date 11 /3 /!17 Plate A 19 Subsurface conditions ~picted represent our observations at the time and location of thls explora.tory hole, modlfled by engineer1ng tet:ts, analysis and judgm~nt. Tuey S<e not neeessadly rept8$8ntaTive of other times and toca.ttons. We cannot acc;:ept responalbility for the use 01 interpretation by othors ot Information pA$8nted on this tog. ,... .. ' .,. ' ... .. .. .. r, .J Q. ... Test Pit Log Project Name: I Sheet of Zelman Prone"'• Parcels A, B and C 1 1 Job No. l Logged by; I O.te: Test Pit No.: 3000--3 DSL 1Q/20/97 TP-111 Exeavation Contactor: Ground Suri.ace 8evation: · N.W. Excavatlna Noles: 0 -,: • -Surface Conditions: Brush w ,: 0 + -.. 0 -" Q. " -" (%) .. • ..... • .. ~ • "' . "-• ::, "' t. .. C .. .. ., L..-ML Brown sandy SILT, loose to medium dense, moist 19.3 1'---...._ 2...._ ·'--- 31-- ~ 4'---,,__ 36.6 5...._ L-- IS...._ h- 7'--- .L-- 8 ......... ~ 9 L-- L---becomes wet 10 ,__ -caving :r, JJ L-- 11 L..- ·'-- 12 ~ -6" diameter log L-- 13 L-- L-- 14 Test pit terminated at 14.0 feet below existing grade. No groundwater encountered during excavation. -~~~~!1~· Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Pro]. No. 3000-3 I awn • GLS Date Nov. '97 Checked RAC Date 11/3/97 I Plate A20 Subsurface conditions de~eted represent our cbservatioos at the time and location of this exploratory hole, modified by eng,neermg tests, analysis and' Judgment. Yhey are not necessarffyrepresentatlve ol other ~mes and locations. We cannot accept n,spon.siblrrty for the use or interpretation by others of lnfotmatfcn presented on this log. ,.. .. ' ... ' ~ Test Pit log Project Name: Zelman Pro Pa,cels A. B and C Sheet 1 Qf 1 Job No. 3000-3 logged by: Date: Tm Pit No.: DSL CXcavation Contactor: N.W. Excavatln Notes: ~-w r. 0 .. ,, ('L) O E ~ :> .. " 32.2 33.0 31.4 s:. .. ..... . ... C 2 3 4 • -.. e • " -"' 0 0 ,, "' E :, ,, "' ML 10 20 97 Swface Condmons: . Blackberry Bushes TP-112 Ground Surface Elevation: ± Brown SILT, loose to medium dense, moist 5 1-+""s'"'M:+--:G""ra--=d-es-:-to_g __ r-ay-,sil""ty....,,SAN==o---. ,..loos--e .,..to_m_ed-::-iu_m_d.,.e_ns_e_, m-o..-ls7t ------1 5 7 8 9 10 11 12 13 -caving -becomes wet 141--+--+--:..---c--::-:---:--:--:--:--:-:--=-a---:-,--..--.,.-,------,---,-;----.,----,-·----l Test pit terminated at 14.0 feet below existing grade. No groundwater encountered during excavation. ~·1-----.l--....L.._.....,__.,__,__.....1 ______ .....,,__ ___________________ --i Test Pit Log Zelman Property Parcels A. B and C Renton, Washington .,i--------.-------,--------1-------,--------,--------i I!; ProJ. No. 3000-3 Own. GLS Date Nov. '97 Cllacked RAC Dote 11 3/97 Plate A21 Subsurface conditions depicted ,epresent our obs1KVations at the time anQ location of this exploratot'y hole, modified by engineering tests, analysis and judgment. They are not necessas1ly representative of other times and locatioos. We cannot accept responsibility for the use or interpretaUon by others of information p~sented on 1his log. ... .. ' .. ' ~ ~ "' " " " "' .J .. ... Test Pit log Project Name: I S!w,at of Zelman Pron '1v Parcels A, B and C 1 1 Job No. Logged by: l Date: Test Pit No.: 3000-3 DSL 10120197 TP-113 Excavation Contactor: Ground Surface Beva.Uon: N.W. Excavatino Notes: 0 -• -Swfaoe Conditions: Grass :i: 0 ,: ., 0 w .. .Q + .. " .a ..... • ., . (%) • E . ... • :, " L :,, 0 0) .. " " .,.._ ML Brown SILT, loose, wet 37.4 P-- Ll=42 PL=30 .,........ Pl=12 2 ,--,.._ 3 I- .. ,........ 4 I--mottled I- s I- _,__ 6'-,__ 39.7 7 >-- I- 8 SM Brown silty SAND, loose to medium dense, wet '·· ,__ ; 91--28.5 -caving I- 10 I- i·' I- 11 Test pit terminated at 11.0 feet below existing grade due to caving. No groundwater encountered during excavatlori . -~2~!~l':~· Test Pit Log 2elman Property Parcels A, B and C Renton, WashingtOn Proj. No. 3000-3 Dwn . GLS Date Nov. '97 Checked RAC Date 11/3/97 I Pla1o A22 .. Subsurfaoe oond1t1ons depicted represent our observations at the tirne and location of this e,cpl~ratory hole, modlfled by engineering tests, analY$is. and judgment They are not neoaasarity tapresentative of other times and locations. We cannot accept responsibllify for the use or lnterpretauon by othen: of htfonnation presented on this 1og. ... .. ' .., ' - Test Pit Log Project Name: Zelman Prooertv Parcels A, B and C Job No. 3000~ Logged by: Excavation Contacto.-: N.W. Excavatina Note~ w (%) 31.9 DSL u - -0 ,: .0 a. • . :,, .\; ., ,: • -... a. a. +-• . ... • 0 ., ·I- 1-·-2e---3>---4- +--- 5,--- 6- ·- 7-- 8- ·- -.. 0 " .0 ., • :, :,, " ML I Date: 10/20/97 Surfaca Conditions: Blackbeny Bushes Brown SILT with sand, loose, moist -becomes sandy Test Pit No.: TP-114 Ground Surface 8evation: ol 1 28.9 ;1111: ,_=_......,S_M-1--~B-ro_w_n_s_llty_S_A_N_D-.-,-00-s-e-to_m_ed_lu_m_d_e_n_se_,_m_ol_st_t_o_w_e_t ______ _. ';; .. ' .. .. ' 33..5 - 11 -- 12 -- 13 -14 -- 15 ---16 ML -caving Gray sandy SILT, medium dense, wet Test prt terminated at 16.0 feet below existing grade. No groundwater encountered during excavation • -1-----'--..l...-..J..-.!--..J..--"-------,r----------------------1 ~ Pro). No. 3000-3 I Own. GLS D•1• Nov. '97 Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Checked RAC Date 11/3/97 I Pta1• A2s Subsurface conditions depicted represent our observations at the tame and location of this exl)foratoty hole, modified by engineenng tests, analysis and judgment. Th&y are not necessarily r~ntative of other times and locatlons. We cannot aocept respooslbillty ior the use or lntecpreta1ion by other& of information presented on this log. ... .. ' " ' - Test Pit Log Projoot Name: Zelman Pro JobNo. 3000-3 &cavation Contactor: N.W. Excavatln Notes: w (%) 38.1 PL=36 PL•Zl 38.4 Pl=7 37.3 Zl.4 0 - -0 ,:; .,. a. e • :> l;; ., .r: .. .... .... C 2 3 4 5 6 7 8 9 BandC • .. 0 Cl 0 .tl e .. e • ::, JI ., ., ML Date: 10 20 97 Surface Conditions: Blackbeny Bushes Brown SILT, loose, wet -becomes mottled Te$! Pit No.: TP-115 Sh .. t 1 Ground Surface Bevatton: or 1 101---+~~+-~-~~~-~---------------~-------I SM Gray silty SAND, loose, wet 11 12 13 14 -caving 1sf---+----f----c=---,---,.-.,---.,..--,---,---,--,----,--.---......,......,..,...---,-----l Test pit terminated at 15.0 feet below existing grade. No groundwater encountered during excavation . -'1-------'---1--..L......Jl-..J..-.....Jl-------~-----------------------1 ..J Test Pit Log Zelman Property Parcels A, B and C Renton, Washington e, Pfoj.No. 3000-3 Own. GLS Oat• Nov. '97 Checked RAC Date 11/3/97 Plate A24 Subsurface condffions depk:ted repr8680t our observations at the time and location of this explo<atory hole, modified by engineering tests, analysis and iudgmant. They are not necessarity representative 01 other times and locations. We cannot accept responsibility 10< the use or 1nterpreta1ion by others of inlormadon presented on this log. 1') .. .. .. M .J Test Pit Log Project Namo: of Zelman Pro e Parcels A, B and C Sheel 1 JobNo. 3001).3 Logged by: Date: Test Pit No.: DSL Excavation Contactor: N.W. Excavatln Notes: Q ,: 0 w .... ('X,) • e ~ ,. ., " 40.1 33.0 40.1 ,:: + a.+ ... C 2 3 4 • -.. e • "' 10 20 97 TP-116 Ground Surlace Elevation: -"' 0 Surface Conditions; Grass " .0 " e :, ll " ML Brown SILT, loose, moist -becomes mottled 5!---1-~-1----------=----.,----------------1 SM Grades to brown silty SAND, loose, wet 6 7 8 9 10 11 12 -becomes gray -caving -peat seams 131--..+---+---,.,,....----.,----,----,.-~.,----,--,-----,---,..,----~-----1 Test pit terminated at 13.0 feet below existing grade. No groundwater encountered during excavation. ~ Earth Consultants Inc. ~ ~~~·~SOcnl1sts Test Pit Log Zelman Property Parcels A, B and C Renton, Washington ~ Proj. No. 3000-3 Own. GLS Dato Nov. '97 Oieoked RAC Date 11 /3/97 Plato A25 Subsurface conditions d~lcted represent our observations at the time and location of thrS exploratory hole, modlfled by engineering teslS, analysts and judgment. Tiley are not necessarily representative of other times and looatlons. We cannot aocept responslblllty for the use or Interpretation by othafS of lnfonnatron pre:sE11nted. "" this log. ... .. '\ " '\ ~ " " " " " .J .. I- Test Pit Log Project Name: I Sh-,et of Zelman Prooertv Parcels A B and C 1 1 Job No. I I.egged by: I Date: TOSI Pit No.: 3000-3 DSL 10/20/97 TP-117 Excavation Contactor; Ground Surface Elevation: N.W. Excavatino Notes: u -s:. • Surface Conditions: Bare w :c 0 .. .. 0 .. .,, .. u .0 a. .. • 0) E (%) • • . ... • ::, :> L :> c· .... "' .. ·-SM ALL: Brown and gray silty SAND, loose, moist 1---appearance similar to car battery terminal 2--debris corrosion ·--brick 3--vibram shoe sole .- 4 ML Gray SILT, loose to medium dense, moist ·- LL.m:38 ?L•31 39.4 5- f'!-=7 'C-- a-,,...._, 1--s--strong acidic odor --becomes wet 9 ,__ 41.7 .,-- 10 Test pit terminated at 10.0 feet below existing grade. No groundwater encountered during excavation . -~2!!,..U}~~-Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-3 I 0wn . GLS Date Nov. '97 Checked RAC Oal9 11/3/97 I Plate A2f3 Subsurhtce <:onditions depicted represent our observations at the tlme and location of this exploratory hole, modified by engmeeriflg t88ts1 anafysls and }udgment. They are not neoessa,Uy representative of other times and locations. We cannot accept responsibility for the use or Interpretation by othBfs of informa~on presented on this log. Test Pit Log Project Name: Zelman ProM-· Parcels A. 8 and C Job No. I logged by: 3000-3 DSL Excavation Contactor: N.W. Excavatlnn Notes: w (%) 16.9 o_ -0 " .0 D. E . ::, .Ii .. m " • .. .. .... e ... • Q (/1 ·'--, '-- ~ 2'-- ·'-- 3'-- . ·'-- 4'-- ·'-- 5..__ L- 6'-- ·'-- 1~ '-- 8 -~ 9 "' 0 <.) Jl ... :, ::, "' ML SM I 0 ~ 1 ~120197 Test Pit No.: TP-118 Ground Surface Elevation: Surtace Cond!Uons: Bare, shredded wire pile Gray sandy sf LT, medium dense, moist -caving Gray silty SAND, medium dense, wet Test pit terminated at 9.0 feet below existing grade. Groundwater seepage encountered at ao feet during excavation. Test Pit Log Zelman Property Parcels A, B and C Renton, Washington ol 1 ~ Proj. No. 3000-3 Own. GLS Date Nov. '97 Checked RAC Date 11 /3/97 I Plate A27 Subsutface conchtkms depicted represent our observations at the time and IQCation of this exploratory hole, mocUfied by engineering tests, analysis and judgment. Thay al'8 not necessarily representative of other times and locations. We cannot accept responsibility for the use or Interpretation by others of lnformation presant&d on this log. ,.. .. ' .. ' I') .. .. .. I') .J .. ... Test Pit Log Projed Name: I Sheet of Zelman Pron ,rtv Parcels A. B and C 1 1 Job No. Logged by: I Date: Test Pit No.: 3000-3 DSL 10/20/97 TP-119 Exca\18lion Contactor: Ground Surface Eleva1icn: N.W. Excavatlnn Notes: 0 -J; • -Surface Conditions: Bare w :;; 0 ..... "' 0 .. .a u .D (%) • & ..... " . L :,, S IL • :, :,, ., .. 0 " .. I t--ALI..: Rubber upholstery, wires, metal debris n-- +- 20-- t---minimal natural sou 31-- 1--- 41-- 1-- 5 Test pit terminated at 5.0 feet below existing grade. No groundwater encountered during excavation. -~~~.1~~-Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Ptoj. No. 3000-3 I ewn. GLS Date Nov. '97 Checked RAC Date 11/3/97 I Plate A28 Subsurface conditions. depicted represent our observations at the time and location of this expl9ratory hole, modified by e~lneenng tests, analysis and judgment They are not necessarily representative of other times &r!d locations. We cannot accept responslbillty for the UH or Interpretation by oUlers of information presented on this log. .... .. ' .. ' " " M .. .. .. "' ... .. ... Test Pit Log Project Name: I Sheet of Zelman Pron ,nv Parcels A, B and C 1 1 Job No. I.Dgged by: I Date: Test ?tt Ne.: 3000-3 DSL 10/20/97 TP-120 Excavation Contactor. Ground Surface Elevation: N.W. Excavatirm Notes: 0 -.c 0 Surface Conditions: Bare -0 -" 0 w .c .0 ...... u ll (%) ... a.,_ E ., . . ,. .... ::, ,. ~ " a 0 " ~ "' ~ ALI..: Wood waste, rubber, metal, wires, upholstery ~ 1--~ I 2-r~ ·--minimal natural son s--·-~ 4-. ......_ ~ 5 Test pit terminated at 5.0 feet below existing grade. No groundwater encountered during excavation • -~~~.1~!1~· Test Pit Log Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-3 I 0wn . GLS Date Nov. '97 Checked RAC Date 11/3/97 I Plate A29 Subsurface conditions deflicted represent our observations at the time and locatiOn of this: exploratory hole, modified by engmee,ing tests, anal}'$1S and Judgment. They are not necessarily representative of other times and locations. We cannot accept ,esponslblllty for the use or interpretatJon by others of infonnation presented on this log. .... .. ' V ' -- "' .. .. .. I') ..I .. ,.. Test Pit Log Project Name! I Sheet of zeJman Pron nv Parcels A B and C , 1 Job No. Logged by: I Datfl: Test Pit No,: 3000-3 DSL 10/20/97 TP-121 Exeavation Contact.or: Ground Surfaoe Elevation: N .W. Excavatioo Notes: u -L • -Surface Conditions: Grass w -0 .. "' 0 .c Jl .. u Jl ('>I) o. e .... • ., e . " . ... • :, :, i ., C, .. ·"' ij :s -SM RU.: Muffler, metal debris, brown and gray silty SAND with gravel, dense, moist 1-- 2--coke cans 16.3 ~ -X 3 ,--·plastic .--I ·-·brick debris Q~ -s-·pipe fitting --""""" 6 e-'-ML Gray SILT, medium dense, moist U.=38 PL=30 36.8 7f--- Pl~s -- 8'---- a- '-- 10 ---caving due to seepage - 11 -..i,ecomes wet and dense 3/l.7 -- 12 -- '"' 13 -Test pit terminated at 13.0 feet below existing grade. Groundwater table encountered at 13.0 feet during excavation . -~~~U}~~-Test Pit Log Zelman Property Parcels A, B and C Renton, Washington ProJ. No. 3000-3 I 0wn. GLS Da16 Nov. '97 Choolced RAC Dalli 11/3/97 l Plate A30 Subsudace conditions dePieted represent our observations at the time and loeation of this exploratory hole, mocftfied by enganeertng tests, analysi$ and judgment. They are not necessarily representath,o of other times and locations. We cannot accept respoosibltity for the use or interpretation by others of information presented on this tog. Graph BORING NO. logged By RWB Date us cs sm Sp 0 0 sm ml sp 0 sm 5L10LB6 Soil Description Silty SAND, brown, loose, moist SAND, dark gray, medium to fine~ medium dense, wet. Silt% increases with depth grading to sili:y sand Sandy SILT, light gray, medium dense, some organic fragments, wet SAND, dark gray, medium to fine., dense to very dense, wet Total Depth= 58.S feet (B) denotes bentonite pellets Earth ·l!jl Consultants Inc. 1 1 ELEV. +14± Depth (N) w Sample Blows (ft.) Ft. (%) I 5 22 52 I 3 28 10 I 13 15 -. 19 24 -L 20 I 15 25 I 10 30 30 ...L 11 35 I 19 40 T 52 -1... 45 I 52 50 I 31 55 30 BORING LOG STERNOFF l1ETALS PROPERTY RENTOll, WASHINGTON As -Built Well Diagram . ... • u • ;,(U. t, . ,... • <J • .... g• ~ .. CJ: ... . . . . .... u·: .• · ... ·-·.o· : ·,·; . ~: ·•·· :-:':"'.; GEOTIE:CHNICAL ENGINEERING & GEOLOGY Praj. Na. 3000 Date May' 86 Plate A31 BORING NO. _2L...._..... Graph Logged By RWB Date 5/ 10/86 us cs Soil Description · .. :;:...ii. ... sm Topsoil, silty SAND, brown Silty SAND, brown/mottled, medium to fine, subangular to subrounded, loose, wet medium dense dense Total depth m 29 feet (B) denotes bentonite pellets Earth ~ Consultant:s Inc.~ Depth (ft.) s 10 2: 15 20 25 ELEV. +14± Sample I I I I I (NJ Blows Ft. 5 6 4 10 9 35 w (%) 32 30 22 BORING LOG STERNOFF METALS PROPERTY RENTON, WASHINGTON As -Built Well Diogrom .. • •., ~ .. -"' . .. . " . " . ... .. .,. •.a . ., •:, . "4 .Ghc .-; ..... • •O • ..0 • p.. ..... "' . c., . . :> <>< ~~~:~:·::~ ·::~=/·:=: i~,~ • ••ID•', ·:::~~; lli~f GEOTECHNICAL ENGINEERING & GEOLOGY Proj. No. 3000 Date May' 86 Plate A32 Graph BORING NO. ___,,,3.___ Logged By RWB Date 5/10/86 us cs sm Soil Description Silty SAND, bluish-gray, medium dense, (fill), noticeable odor Silty SAND, gray, looset wet, some odor Total depth= 44 feet (B) denotes bentonite pellets Earth Consultants Inc. Depth (ft.) ELEV. _+'-'1~4~+'----- (N) Sample· Blows Ft. w (%) As-Built Well Diagram . . . . . I 17 30 .. "' .... 4 . . . "'~" 6 s I 4 10 I 7 15 I 12 20 I 10 25 I 12 30 I 12 17 35 I 47 0 40 BORING LOG STERXOFF ~!ET,>.LS PROPERTY RENTON, WASHINGTON GEOTECHNICAL ENGINEEAING & GEOL.OGY Proj. No. 3000 Date May' 86 Plate A33 . BORING NO. ___.4_ Logged By RWB Date 5 /l 4 /86 Graph I 'I! ::,..~J.. --:.. us cs ml Soil Description Sandy SILT, gray, some clay. Brick rubble at surface, mottledi low plasticity ~-=-:~=.:,:; pt PEAT; brown ~ibrous, very so£t 1 wet ~-=ti:ti"S --------. JJ ··· sm If ... Silty SAND, gray, medium to fine, medium dense1 wet •• 11: ·:: Total depth= 49 feet Earth ~ Depth (ft.) -10 ' -- - -20 - ' f-25 ' ' ~30 ' " -35 ~o ELEV. +14~ Sample I I I I I I I I I T (N) Blows Ft. 9 4 2 13 15 2 0 16 21 29 w (%) 32 35 30 16 22 BORING LOG STERNOFF METALS PROPERTY RENTON, WASHINGTON Consultants Inc~ GEOTECHNICAL ENGINE;ER1NG & GEOL.OG'f Proj. No. 3000 I Date May' 86 Plate A34 • Graph BORING NO. --""5"--- Logged By RWB Date 51)4/86 us cs Soil Description Total depth -29 feet fine sand, Depth (ft.) .. .. .. I -5 .. 2 .. .. -10 .. .. r-15 ,. .. .. r-20 .. c r-25 c .. .. ELEV. +14+ Sample I I I I I T (N) Blows Ft . 5 3 2 24 24 25 w (%) 30 25 22 28 BORING LOG STERNOFF METALS PROPERTY RENTON, WASHINGTON ~--· GEOTECHNICAL ENGINEERING 8: G£0LOGY Proj. No. 3000 I Date May' 86 I Plate A35 Depth Logged By RWB Date 5/10/86 TEST PIT NO. _.._1 _ Elev. +14:t: (ft.) USCS Soil Description 0 ....... =...----,----------'----------r--,----, w (%) -lil44'a----FILL ------- N/A FILL, unit consists of shredded non-metalic auto xx, parts in sand/silt matrix. Unit is gray and wet -..... =~---------------l '1 ' -"flill~ f.c~:i:~t sm Silty SAND, bluish gray1 medium to fine, loose, occaSional clay-silt inc:::lusions 10 -Total depth= 9 feet 10 - . . - Logged By RWB Date 5/10/86 TEST PIT NO. 2 Elev. +14/; N/A FILL, mixture of steel slag mixed with native soilJ traces of oil ml/mh Clayey SILT, bluish gray, mottled, soft, medium plasticity, moist Total depth Earth \, 8 feet TEST PIT LOGS STERNOFF METALS PROPERTY RENTON, WASHINGTON Consultants Inc. ' GEOTECHNICAL ENGlNEERlNG 8: GEOLOGY Proj. No. 3000 Date May' 86 Plate A36 Depth (h.) 0 - - - 5- - - - - 10 - - - - - 15 - - -- 10 - - - - - 15 TEST PIT NO. 3 Logged By E WB Date 5/]Q/86 > jl uses Soil Description ><}I ~"'._-_::_L_:-:.__:~_:Y_ :'~d, black with some oil ml SILT, tan with fine sand, loose, non-plastic, moist Total depth~ 6 feet Logged By RWB TEST PIT NO. 4 Date 5/10/86 ml/ sm Sandy SILT, brown to tan, loose to medium dense, some roots Total depth• 5 feet Elev. +14+ w (%) Elev. +l 4 ~ Earth ~ Consultants Inc~ TEST PIT LOGS STERNOFF METALS PROPERTY RENTON, WASHINGTON Proj. No. 3000 I Date May' 86 GEOTECHNICAL E;N(i1N££FUNG & GE:OLOGY Plate A37 . TEST PIT NO. 5 Logged By RWll Date 51'.lOL86 Elev. +14± Depth w (ft.) uses Soil Description (%) 0 _18& N/A FILL, debris includes ash-slag, brick, c.onc.rete and scrap iron ------------ml SILT, bluish-gray, slightly mottled, occasional 5-organics, noticeable H2S odor - -Total depth = 7 feet - 10 - - - - - 15 logged By RWB 6 TEST PIT NO. Elev. +14± Date 5llOL~6 0 "i3J I -l· -,U I ml/ Sandy SILT, brown, f ioe, loose, moist -J Sm -:.. --------------5-1 ml Clayey SILT, brownish-gray, mottled, soft, moist t.o wet -Total depth = 7 feet - 10 - - - - - 15 Earth • TEST PIT LOGS STERNOFF METALS PROPERTY RENTON, WASHINGTON . Consultants Inc. I Date GEOTE;CHNICAL ENGJN!:ERING & GEOLOGY Proj. No. 3000 May'86 Plate A38 APPENDIX B LABO RA TORY TEST RES UL TS E-3000-3 EM'th C,onr.ultaot11, Inc. PERCENT COARSER BY WEIGHT ..I I I I I a. I I I 1 0 ~ 0 0 0 0 0 0 0 0 0 0 N .. .. "' ., " ., m ~ -I I I I ~r-Loo· ..J 1 I I I wo· ..J . <n ZOO' zoo· ~~ en i3 ~ 0 00 "' 0 >-EOO" ~c "' 0 "' 0 rocr ·-m ..J o~ N "' ,., <(:, POO' wo· :,.; 5 2:, u <(;;; 900' 900' "' a: w eoo· w wl~ socr 2 1-1« L<r LO' ;;: wz :;;'<i: 0 a: zo· zo· 0 >-£0' co· :r: 1,{)' •o· 90' 90· f-ooz so· ,-,-~ • i:,.· ... : .,. ~ , . 2 <( ... ~y ~y~ 0 0 ... ... ~ "' 1= z OOL a: .. ~ 0 <( 08 z·~ z ~ ,_ u: 0: ~ .. . w (.) "' .; 09 £' ;'!§ "' "' ::i OS w Ul ;,,, ...J 0 .. :c 017 ~ t:,·~ t-'O .... z :,.; 0 ., .... ,_ 'O (/J 0 0£-9·~ z .. 0 ~ :, <( ... :'ii >, s·w ::, "' O' " "' .. N Q "' ... :c . I-L ;; w >, "' >, .. 9 :, .... >, .. 2 ... .. "' .... < ,-a .... " .... & .... "' ., <n OL z 0: .. .. en"' Cl ., i "' 8 a: >, >, " >- £ <( .. .. 0 .. ..J 0 ... ... ... .... ~z • u Cl Cl "' "' " ,--<t:- 9 :e: ·~ U) "' w 8 w u I :e: :e: :e: > z U) "' "' "' "' w Bit OL ;;: ::, "' cno "'' ... :,: w "' ;;; .,. > t:; "' "' -<( N N "' ..... ;;; .,. oz a: w-.... CJ l w CJ 0-z o,: "' ~ ti 2 .,, a: o• <( oz w Z,,L 0 .,,~ .... "' " " I& u c-I I I I z ·-0.. "' "' "' "' 09 ~~ u. 0 ~ 0 "' i! w £ 08 ,--N OOL U) I '" " w ! ..J > I 9 a, w I I "' "' . ooz 0 0 <l 0 • u r--?L 00£ -0 0 0 0 0 0 0 0 0 ~ 0 ~ m .. " ., "' .. "' N PERCENT FINER BY WEIGHT (N.t !:~l~.;,~12~~~!~~,::,} .. ~~.:"' GRAIN SIZE ANALYSES Zelman Property Parcels A, B and C Renton, Washington Proj. No.3000-3 I Drwn. GLS I Date Nov. 1 97 Checked RAC I Date 11/4/97 Plate Bl PERCENT COARSER BY WEIGHT ..J ' I I 11. I I I 0 0 0 0 0 0 0 0 0 0 ~ 0 ~ N I') " "' "' " ., m l I I --~00' r---' 1,1)()" -' ' I I en wo· ioo· ~~ in " ~ 0 "' "' >-too· ~ C too· .,, ~ 0 rl "' ..J o~ "' "' "' <( 1'00. too· :;; g z CJ <(;:; 900" -eoo· "' a:;w eoo· w w ~800' z I-., ur ,o· u.. w :E Oc, ZO" zo· a:: Cl :,.. to· to· J: t,Q" oo· 90· 90· -IC ooz eo· --a: !, 1· z .. 0 0 • "' ;: 00<: a; w 11. 08. z·~ ;:; a; " y w ~ CJ ~: 09 t· :§ "' OS w I -' Q :,: 01' t·:: t-u i :;; Q I!. 0 0£ ' 9·z z ;\j .. :i: <l ..., .. a·w :, ., "' H oi: I !::! ;; "' "' w t' >, E< w 9L :i: :. I z ..... -g ..., .... H ~ ,, <l ,-" "' "' cno °' z cc w "' <ii a: (!I " " " 8 a: >-~ < :< >, ~ t D "' a ..J :E 0 .. .. ... <(:, " " "' (!I "' zZ ,-t"" <(~ 9 '• "' "' ..., ..., IJJ 8 w C.l "' "' "' > z "' IJJ ., ""' OL ii: ::, _w cnz "· _, w :c ;:; . > t:-:: 0 1!! r-<l rl rl rl .. , oz a: ~= 0 L w Cl z Ot ., -0 I~ >t,L a: .,,1 o• < 0 2: rl rl "' 0 "'~ 0 0 0 0 " ·= a: rl rl rl z 09 -~ ' I I 00 "' "' "' I~ £ 08 ,--a:, i!! .. .. .. .; " OOL "' w ..J >-9 "' w "' " t-ooz 0 0 <I 0 u --ii 00£ -0 0 0 0 0 0 0 0 0 0 0 0 ,. m " "' .. .. M N ~ ~ PERCENT FINER BY WEIGHT ~-GRAIN SIZE ANALYSES • I <~~,.~~ •• s.~~:~~!!~~:,.,:,~;,:"' Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-31 Drwn. GLS I Date Nov. '97 Checked RAC I Date 11/4/97 I Plate B2 PERCENT COARSER BY WEIGHT ..I I I I D.. I I I 0 ;! 0 0 0 0 0 0 0 0 0 0 N M ~ "' "' " .. '" ~ LOO' r--I I I ,__ ..I l.00' ..I I I I z:oo· e~ :!2 wa "' " -.... <r "' >-EOO' _;; . &oa "" .... 0 ...J o-1100· :;; g "' .... "' <( :; voo· z~ (.) 900" "' <( -900' a:,::, 800" w 800' 2 W-10· u:: t:;; ,a :a: ;l' 0" zo· a: zo· Cl >-to· to· ::i: i,o· •o· 90· 90' ,_ .. :--,_ ooz so· 0: '. z "' 0 0 "' i'.= ~ oo, a: w "-OB z·~ z ii: ... ~ ;;: "' w (.) :; 09 s· ;!: "' w OS ..I 0 :c Ot, : ~· ::::! t- ~ :;; 0 0 OE. 9' ~ z ~ ~ ~ :. "' Ul e·w =, " .. oz L ~ 0 >, :c .. w "" ., "' 9C "' :; .., .... ~ ~ u 2 .... ..... Cll .. .... ~ "' I-Cll CJ)O OL z a: w ~ " <i5 0: Cl "' 2 :,, 0: ll "' >-t "' ... 0 ...J :; " "' "' Cl <(~ ... -- ~L.. .. 9 "' w •• (.) ~ :,;: ~ 8 w "' "' r;; "' OL ;', ::, % u. "' ..., "' w :,:: % .... ~ :;::-. "' 0 !' oz w,!, .... "' 'It 0: "' '" " 0 L Ot " -0 z '"' 0: o• "' oz "' "' "' w .,,, 0 0 0 0 .. .. -c., c-.... .... .... 0 z ·-D.. I I I u. 09 --0 ~ t "' 0. 0 .. I-.... CD ~ E< E< w t OB I- N OOL "' I I ;;; • w ..I >-I 9 a, w I CD " ooz 0 0 <l 0 (.) 1-L. ZL OOt ~ 0 0 0 0 0 0 0 0 0 0 0 ;! "' .. " <O ., ., M N - PERCENT FINER BY WEIGHT tfl! ' i1!l1 ' GRAIN SIZE ANALYSES (~-I ,~:!,~,~~12:.::.'.!!~,~:,},~i~,;,,, Zelman J?roperty Parcels A, 8 and C Renton, Washington Proj. No.3000-31 Drwn. GLS I Date Nov.1 97 Checked RAC I Date ll/4/97 I Plate B3 . I SIEVE ANALYSIS HYDROMETER ANALYSIS "O I Sl7E r F OPENINt'~ 1ru LNr"fiS:S IN B"'R Of MESM PE"" INCH US ~TANnAR .... AIN E 'MM ~. I 00 o.., " "' ., <D ~ §. s 8 N Ji;'~r~§~.f 0 ~ !<I 0 0 00 N q~ ~ z ~ "' v M ;,}! r I') ~ IOICI ., l2 ~q q C! q q ? 100 ..... -. 0 w .... ... 0 ... ... . . 0 .... 0 90 10 I w r-i {Tl 0 a o., -C 80 20 ~ I ::\. ~ m -c ? ~ ::, :JJ m ! () ~ 70 30 :JJ 2 n G) Jo -I m t" I' ::i 2 ti) :n 60 .__ 40 -I ~ (/J -IE 2 n m 0 ....... :U 50 L..,_ )> " § 50 0 ~. :JJ .. ro en ~ ' ...... -< m .. ~ Cf> ~ 00 :JJ z r - GO 0 1 :J m ro < -< l () G"l -t . ::C 30 ' ~ ,!> 70 " , -I m G"l () :r 20 "' 80 J: -I n "' 7C "' .. - C. ,... ~ 10 90 !:! " (1 "' ' ' ' ' l" ... Cl 0 100 .. 0 ;II 8 0 0 0 0 0 0 0 0 " .. .. "' ... -m"' .. "l N r 0, W ¢ M g r-co 10 ~ ~ ~ ---:, "' 0 0 " .. " M N r '~ 0 q 0 0 0 O 0 rt .. )> "' ... r GRAIN SIZE IN MILLIMETERS . ~ C! q 0 0 ... 2 .. :, rr COBBLES : COARSE I FINE I COARSE I MEDIUM I FINE I ~ -'< FINES .. Cl) GRAVEL I SAND I ~ "' N I-' I);~ m I-' " :r 0 )> Boring or DEPTH Moisture .. ~-" z KEY uses DESCRIPTION LL PL " " ,... )> Test Pit No. /ft. I Content(%) ,!> "' "' ~ ..., g:,, "' ---::, -rn "O "' o--TP-109 l SM Brown silty SAND with gravel 15.3 ;; ----.. "' " 6---C. TP-111 l ML Brown sandy SlLT 19.3 ---- "' (1 ... O···· ....... TP-112 l ML Brown SlLT 32.2 ---- ' I PERCENT COARSER BY WEIGHT _, I I 0.. I I 0 0 0 0 0 0 0 0 0 0 0 0 N ... .. "' "' ~ "' "' ~ 1..00· ........-I I ~-_, LOO" ..J I I Cl) zoo· f~ zoo· Cl) :, ~ "' "' >-wo· ,; :; ...J wo· o~ ..... "' ooo· le g (') ..... ~i j,()Q' u <(,; 900' eoo· "' 0: w 800· w u.t !::! 800" z I-~ LO' LO' ;;: ~- 0 0: zo· zo· Cl >-£0' £0' J: 170' .a· 90' 90' ~I-ooz 80' ,__ 0 ,, L. 2 a: .. 0 0 "' i= z OOL 0: w ... <( OB i·~ ;,; 0: w ~ 0 ,~. 09 .-~ "' rn; w 1l " _, 0 :t 01' ··= I-"' ~ le 0 "' -0£ g·z z ;:: ~ a: ~ :, <( ... 1::' e·w :, "' .... H :t m: I-' ~ a 3' "' "' "' w ~ 9L :i; ~ :>, z "' ;;: I-H ~ C/llt "' OL z 0: w "' -~ a Cl "' C Cl) "' a: " :>, >-II) £ <( 2 "' ...J :, 0 .. <( z • u "' " ~~ _,_ •,, 9 "' w a w 0 ..., 'il > ;,; "' "' w % OL :::, ti; :t ~ "'• .J :c ~ w -> t-:: ..... ..... -<( ;,; .,. O< a: b~ I~ L w " 0£ "' -0 12 ~,L a: ... "' "i,L o, <( oz ..... ..... w 0 ..... ..... .. "'~ 0 u c·-I I z ·-0.. ~ "' OS -~ 0 ~ ... ,_ I-a, m I!' C 08 I- "11 17 001 "' I l w _, >-I 9 "' 111 I "' "' ~ Oil<! 0 0 <J u ..... ~ ZL 00£ .__ 0 0 0 0 0 0 0 0 0 e 0 e "' .. ~ "' "' q "' N PERCENT FINER BY WEIGHT -,;~~~~.s~l2:!:1:~~'~: .. !.,,~:,~,, GRAIN SIZE ANALYSES Zelman Property Parcels A, B and C Renton, Washington Proj. No. 3000-3 J Drwn. GLS I Date Nov. '97 Checked RAC I Date 11/4/97 I Plate BS 100 80 X 60 w V 0 ?; ,, >-@ V I--g40 /.._A-Line ~ / V @ I V 20 ,, V ~ V ,1 CL-ML / ~ I/ I 0 20 40 60 80 100 LIQUID LIMIT Natural Key Boring/ Depth Soil Clossificotion uses LL. P.L. P. I. Water lest Pit (ft) Content • B-1 7.5 Gray SILT ML 35 29 6 34. 7 • B-2 10 Gray SILT ML 37 31 6 37.5 Atterberg Limits Test Data -!;<1~~~~1!~~~~-Zelman Property Parcels A, Band C Renton, Washington Proj. No.3000-31 Date Nov. '97 I Plate B6 100 80 --·-- X 60 . Lu V 0 ~ ,,. >-@ V I- 0 /.._A-Line i= 40 U) /,,,. .,: _J a. @ V 20 ,,. V @1I0 / • -~ CL-ML / -rQL) I/ - 0 20 40 60 80 100 LIQUID LIMIT Boring/ Depth N<rtural Key Soil Classification uses LL. P.L. P.L Water lest Pit (ft) Content • TP-109 4 Gray SILT ML 36 28 8 37.1 • TP-113 1 Brown SILT ML 42 30 12 42.2 • TP-1.15 5 Bro'lttn SILT ML 36 29 7 35.4 0 TP-117 5 Gray SILT ML 38 31 7 39.5 6 TP-121. 7 Gray SILT ML 38 30 8 38.2 Atterberg Limits Test Doto -~~~~~}~:!!:.~-Zelman Property Parcels A, Band C Renton, Washington Proj. No.3000-3r Date Nov. '97 I Plate 87 _A_ Copies DISTRIBUTION E-3000-3 Zelman Development Company 707 Wilshire Boulevard, Suite 3036 Los Angeles, California 90017 Attention: Sanford Kopelow Earth Can1,ult-enw, Inc.