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HomeMy WebLinkAboutCT 73-03; OCEAN STREET CONDOMINIUMS; REPORT OF ENVIRONMENTAL IMPACT; 1972-12-04" . ~. • '. . DAVID D. SMITH AND ASSOCIATES Mr. Jack Raines Project Engineer Rick Engineering Company 509 Elm Avenue Carlsbad, California 9200B Dear Mr. Raines: • ENVI R01'JMENT AL CONSULTANTS 72-30BA December 4, 1972 The attached report represents our analysis of the environmental impact of the development the Ocean Street co site on the iological conditions rchaeological esources at the evelopment site. Except . scussion or conference as you may request, this report completes our work on this project as quoted in our letter 72-30BA dated November 30, 1972 . . If you have any questions regarding our report or its findings please contact me. We appreciate this opportunity to be of ser:vice to Rick Engineering Company. DDS:dap Attachment Sincerely, (). /I~4.~- David D. Smith, Ph. D. Environmental Consultant BOX 929-E, SAN DIEGO, CALIFORNIA 92109 TELEPHONE (714) 273-3250 " • • REPORT ON ENVIRONMENTAL IMPACT ANALYSIS OF THE BIOLOGICAL CONDITIONS AND ARCHAEOLOGICAL RESOURCES OF MORRIS AND COMPANY OCEAN STREET CONDOMINIUM SUBDIVISION CARLSBAD, CALIFORNIA RICK ENGINEERING COMPANY 509 Elm Avenue Carlsbad, California 92008 By DAVID D. SMITH AND ASSOCIA TES ENVIRONMENTAL CONSULTANTS Box 929-E San Diego, California 92109 DDS&A 72-30BA December ~ t 1972- . , " • SECTION A-2 • DDS&A 72-30SA Decembe r 3. 1972 ENVIRONMENTAL SETTING BIOLOGICAL CONDITIONS The _ ...... _ acre development site was examined by the biological team on November 29. 1972. VEGETATION A denuded trail angles back and forth across the property. The sloping bluff from Ocean Street to the sandy beach is covered primarily with ice plant. In addition, bam.boo is present at the lower levels and sand verbena occurs along the sandy beach front. FAUNA No mammals were observed on the site, however SOlue rodents would be expected to be found in the habitat available. A western fence lizard was observed. The shore birds utilizing the proposed developm.ent site are transitory and use the beach area only for feeding purposes. They would not be expected to nest on either the sand beach or the bluff. -, .~ • PLANTS OBSERVED Ice Plant Sand verbena Bamboo MAMMALS None Observed MAMMALS EXPEC TED Pocket mouse Peromyscus Ground squirrel REPTILES OBSERVED Vv estern Fence Lizard BIRDS OBSERVED Black belli~d plover Marbled Goduit Western Grebe Brown Pelican Sea Gull Sand Piper SPECIES LIST eDDS&A 72-30SA December 3, 1972 Mesembryanthemum sp. Abronia maritima, Unidentified Perognathus sp. Peromyscus sp_ Otospermophilus varigatus Sceloporus occidentalis Sguatarola sguatarola Limusa fedoa Aech..TTIophorus occidentalis Pelicanus occidentalis Larus sp. Erclia sp. This list includes birds observe~ on the beach and in flight or " on the water offshore. It should be noted that because of. the transitory nature of shore bird:::use of the beach area, not all shore . bird species which may use th~ beach area could be expected to be observed during the relatively brief period of obser~ation. • • DDS&A 72-30BA December 3, 1972 SECTION A-2 (Continued) ARCHAEOLOGICAL RESOURCES BACKGROUND Early man probably entered the San Diego County area as early as 20,000 years ago. As that culture, the San Dieguito. entered a second phase, it moved across the mountains to the coastal foothills and lagoons. A third phase flourished throughout the area until about 7, 000 B. C. A second culture (the La Jollan) replaced the San Dieguito after a m.ajor change in environmental conditions. The La Jollan people generally lived near the coast, gathered shellfish for food', and produced large mounds of waste shells. The site of the proposed development lies in the area which was utilized by the La Jollans and the earlier San Dieguito. Therefore, an archaeological survey was carried out to determine whether or not the developm.ent would significantly affect any archaeological resources. SURVEY RESULTS The site lies on a slope from the edge of Ocean Boulevard down to the Carlsbad Beach. The slopes are relnnants of a bluff which originally extended considerably farther seaward but which has been cut back by wave erosion and m.ass wasting. I .<, • • • DDS&A 72-30SA December 3. 1972 Near the foot of the slope, several flakes of crudely modified cobbles were recovered. A single rnano-griding stone and a cobble chopper were also found. A recent bulldozer in the bluff cut exposed a layer of trash deposited in the early part of this century. Broken bottles, c:al1.S, dishware, pickling cloocl,ery, European tradeware date the trash from 1920 to about 1940. This material was found about six feet below the surface where the street now rests. Directly below lies a thin veneer of La Jollan shell debris. This must have been associated with the flakes and stone tools. A single shell scraper was found in the La Jollan component. Shell genera include oyster (Ostrea), mussel (Mytilus ), Chama, scallop (Pecten), wedge clam (Donax), and Pismo. The Chama, Pecten, Mytillls, and Ostrea would not be found on a sandy beach, but rather on a rocky reef-type coast. Therefore, the La Jollan component rtlust have been in use when sea level was considerably lower than it is today. • • SEC TION A-3 ~ El\j'VIRONMENTAL IMPAC TS BIOLOGICAL EFFECTS DDS&A 72-30SA December 3, 1972 The ground cover of ice pl~nt and sand verbena will be removed with a corresponding reduction in (or destruction of) the rodent population. Increased use of the beach area Inay somewhat reduce the time and space available to shore birds for feeding. No rare and endangered species of plants or animals will be affected by this project. ARCHAEOLOGICAL EFFECTS' The sparseness of the La Jollan material indicates the site was only a one or two day encampment and of trivial resource value. The later 20th Century trash midden is common toda.y and of no resource or research value. t ' , . • SECTION B • DDS&A 72-308A Decem.ber 3, 1972 UNAVOIDABLE ADVERSE EFFECTS BIOLOGICAL EFFEC TS With development of the site, the ground cover of ice plant and verbena will be removed with a corresponding reduction in habitat for rodents. Because of the developed nature of the imm.ediate surrounding property, and the disturbed nature of the site; the biological effects of this project are deemed insignificant. ARCHAEOLOGICAL EFFECTS Because there are no significant archaeological resources there are no unavoidable adverse effects. J • SECTION C • DDS&A 72-30BA December 3, 1972 PROPOSED 1tfITIGA TION MEASURES BIOLOGICAL CONDITIONS Care should be taken,during grading and construction, to prevent excessive use of the sand beach area by heavy equip:ment. This would preserve the integrity of the shore bird feeding areas. ARCHAEOLOGICAL RESOURCES No :mitigation measures are appropriate. I . :1 • BENTON ENGINEERING. INC. APPLIED SOIL MECHANIC~ -FOUNDATIONS PHILIP HENKING B'ENTON PRESIDENT. CIVIl-ENGINEER Rick ~ngineering Company 509 Elm Street Carlsbad, California 92008 Attention: Mr. Jack Raines -6741 EL CAJON BOULEVARD Sr'N DIEGO. CALIFORNIA 92115 December 4, 1972 Subject: Project No. 72-2-26A Gentlemen: Reconnaissance Geologic Investigation, Environmental Impact Statement, for Proposed Carlsbad Beach Condominium Carlsbad, California SAN DIEGO: 583·5654 . LA MESA', 469·5654 In accordance with your request, we hove completed the subject reconnaissance geologic investigation, environmental impact statement and transmit herewith our findings~. The intent of this letter is to summarize our observations concerning the geQlogy and potential geologic hazards at the subject site in relationship to the environment. The scope of fhis investigation - . consisted of two study phases, a visual site examination and library research. On April 21, 1972, a visual examination of. the site was made and surrounding areas were inspected to serve as relative points of reference. Available literature was searched. for dafa on-geology and geologic hazards in the area. -In general, we found no unusual or potentially hazardous geologic conditions on the site. The site is underlain by Eocene marine deposits, Pleistocene marine terrace deposits, and Recent beach deposits. This rectangular shaped parcel consists of approximately 1.1 acres bounded by the Pacific Ocean on -the west, Ocean Street on the east, and is located between the westward proiections of Grand and Elm Avenues, Carlsbad, California. It is described as: Lots 1 through lOin the sout~ast 1/4 of section 1, T12S, RSW, SBBM, Carlsbad, California. Topographically, the eastern portion of the site slopes moderately to the west from the west edge of Ocean Street and the western pOrtion slopes gent I y west~rly across the broad sandy beach to the Pacific Ocean. Elevations vary from 0 feet at the western boundary along the Pacific Ocean to approximately 45 feet along the eastern boundary. The soils and geology were observ~d at surface exposures and nearby and adJacent ~atural and cut banks. In addition, boring logs from our previous solis investigation, ProJect No .. 72-2-26A, , ,< ,Protect No. 72 .. 2-26A • • December 4, 1972 Carlsbad Beach Condomini entitled, II Partial Report of Soils Investigation, Carlsbad Beach Condominium, Carlsbad, California, il dated September 8, 1972, were reviewed. Land forms consist of a broad sandy beach on the wes't which abuts the eroded and sloping sea cliffs to the east. Beach sands and underlying gravels, shift with the changing ocean currents and are constantly being removed and replaced by new materials from the north. The sea clif,fs, which have been eroded to a moderate slope (3.8 horizontal tc? 1 vertical), rise to about Elevation 45' feet to a nearly flat mesa which was formed during Pleistocene time by a former higher stand of sea level. Both of these adjacent land forms are in a delicate balance with the natural weather- ing processes, however, in our opinion, the proposed project, because of Its small size and location, will not significantly alter the natural processes. Eocene sedimentary deposits underlie the entire site. These older soils are overlain by Pleistocene terrace deposits along the eastern portion of the site (sea cliff slope) and by Recent beach sands along. the western portion of the site (broad sandy beach). These soils are all primarily granular- type sand and gravel soils and are presently in a stable condition. No expansive soils were .found within the zone of influence on the proposed structures. In our opinion, both compacted and existing nqtural soils will be stable during the developmental and operational phases if graded in accordance with good engineering practice and approved specifications. Footings and floor slabs wUl be founded only on nonexpansive soils during development and will remain so during the operational phase. For purposes of this study, the Eocene sedimentary deposits may be considered to be bedrock. These older deposits are eSsentially flat lying (Dip,' tess than 50) and stable.. In our opinion, thi$ condition will remain the same during both the development and operational .phases. No potentially hazardous geologic conditions were found on the site, however two possible off ... site generated hazards shouid be recognized. One is earthquake generated g'round accelerations and the other is abnormally high surf action. The potentially hazardous affects of both of these natural phenomena can be easily cancelled by normal engineering design during .the developmental phase so that no adverse"effect will occur to the profect during the operational phase. The closest large potentially active faults are the Rose Canyon and the Elsinore, located 1 mile southwest and 25 miles northeast, respectively. The most active large fault is the San Jacinto, Icated 49 miles northeast. The closest major earthquakes to the Carlsbad area have occurred to the northeast along the San Jacinto fault and to the northwest along the Newport-Inglewood fault. These earthquakes had Richter Scale magnitudes ranging from 6.0 to 6.8 and produced Modified Mercalli scale intensities in the Carlsbad area in the order of V to VI. These intensities are approximately equivalent to ground accelerations of 0.·015 9 to 0.032 g, respectively. In our opinion, similar earthquakes in the future, during development and operational phases, will generate similar ground accelerdtions at Carlsbad. The affects of abnormally high surf action may be eliminated or at least minimized by designing the ocean-facing sides of all structures to withstand any abnormally high surf action. Proper engineering design will minimize this hazard both during developmental and operational phases,. No evidence for mafor subsidence or mudflows was observed and none are qnticipated during developmental or operational phases of the project. However, during development, grClding will take place "accordIng to good engineering practice and approved specifications so that future con- BENTON ENGINEERING, INC. , , Project No. 72-2-2.6A .• (.. . Carlsbad Beach Condomint . -3-• December 4, 1972 solidation of filled ground and/or natural soils will be within tolerable I linits. Furthe~re, soil erosion and mudflows will be minimized to within tolerable limits by acceptable ground cover and drainage faciU ties approved by the City of Carlsbad • . If you have any questions after reviewing this letter please do not hesist(lte to contac::t this office. . . This opportunity to be of service is sincerely appreciated. Respectfu II y submitted, i: BENTON ENGINEERING, INC. ReVi.wedbYQ~~~ Philip H. Benton, Civil Engineer Distr: (3) Addressee WJE/PHB/ew BENTON ENGINEERING, INC. CITY OF CARLSBAD PLANNING DEPARTMENT ANALYSIS FOR FEBRUARY 27, 1973 TO: PLANNING COMMISSION TENTATIVE TRACT MAP CASE NO. CT 73-3 DESCRIPTION OF APPLICATION The applicant, R. D. MILLER, is requesting approval of\t'dne-1ot (1) 'sub-'~ . division to.allow development of a 21 unit condominium project·on·O.72· . a'cres of land on the west side of Ocean Street, between Grand and Elm .' Avenues. DESCRIPTION OF PROJECT Building permits for a 21 unit development are pending~ awaittng approval of this one-lot subdivision. The subdivision would consolidate n;'ne' existing lots and include a condominium note to allow the .. sale of each· unit, in conformance with State and local subdivision requirements. The building plans have been reviewed and meet all City R~quirements .. 'DESCRIPTION OF PROPERTY / . . ,-.'-.. '~.'- , ': " '" . , , , . ' " .. . .. ' .. The subject property is presently vacant and is adjacent 'to the Pacific . Dcean, just west of Ocean Street and south of Grand Avenue. Thet~ is , .;,. • .7' : _ a four-unit apartment on the northpl us mul tipl e dwell ings: to the east and " south. There is an approximate 27% slope from Ocean Str~et down to the' " ..... ' ... ' beac;h.· .' " ZONING AND GENERAL PLAN 1. ZONING -Existing: R-3 Proposed: R-3 Adjacent; R-3 2. GENERAL PLAN -Land Use Amendment No.' 1,. datedN~vember.4, 1970, designates area as !IHigh Density" residential, ",lith a maximum" af 70 dwelling units per acre. Applicant is proposing 29 units .. ,: per acre. There is a deficient circulation syste~ in 'the area tbat will ',' .. ', '. ' ~ , CT 73-3" Page 2. '.' , .-', be discussed under "Environmental Impact Considerations h • The Planning Department finds that the proposed subdivision is cons:; stent with the General Pl an. ENVIRONMENTAL IMPACT CONSIDERATIONS The appl icant has submitted an Environmental Impact A~s~ssme'nt per' Ci ty requirements and the proposed development has been declared to have ,a non-significant impact on the environment. . . .' '. , , In the staff's declaration analysis, two major problems werepofnted out. Hoth are common to all development along Ocean Street. One problem i-s circulation, and the other is the sewer capacity prohlem. '. 1. Circulation -The applicant ii providing f6r ~ll re~uired patking on-site, and is proposin~ a 10 ft. de~it~tion alo~if the " subject propertys' frontage on Ocean Street. This problem is. ' somewhat minimized along the southerly portion of Ocean Street because of the ingress and egress provided by Grand AVen\1e, Elm Avenue and Carlsbad Blvd. ' . " 2. Sewer Capacity -Development on this property was 'constder.ed .. , by the Consultants who prepared the Ocean Street,AreaSewer.Study dated October, 1972, which stated up to 200:additional dw~llings could be served by the existing sewer. This development, plus ot~ers that have been approved and are currently under way, bring the tota·l u'p tb thi"s 200 figure. The applicant is also proposing to. install a holding tank to release flows at off-peak hours. . . ~ '. " .. ' . ::'. ,.' ,:~ , , RECOMMENDATION .' •• -: > " , --.:. ,'. r.' ". Staff recommends approval of the Tentative Subdivlsion',r4ap CT 73..,3 'subject to the execution and/or fulfillment of the following conditions: " -, , . 1., .An offer of dedic'ation':shal1 be made to the-.City Of ,: ' .' Carlsbad' for additional right-of-way along·Ocean ·Street ... _'. 2. A future agreement shall be entered: into "'Ii th the' City: for half-street, full frontage improvements along Ocean Street (including curb, gutter, sidewalks, paving, 'str.eet lighting, drainage and new sanitary sewer). .' 3. All domestic water shall be supplied by the City of Carlsbad Water Department. -2" , '-- .. , .. : • . .. ~ ~. ..' -, ~. . ',', ' ,: . CT 73-3 • •••• Page 3. 4. Sewer service shall be by connection to the Carlsbad Public Sewer System. 5.' Sewer and water lines shall not be laid in,the s~me tfench; 6. Proper drainage shall be maintained 'throughout the, s~bdlviSion so as to prevent ponding and/or storage of su~face,water. 7. All fire protection appurtenances shall be 'constructed in . " accordance with City Fire Department requirements in lieu of required access roads, and·said appurtenances shall be installed and functioning prior to framing construction •. : B. Final map approval shall be subject to paymeritof Parks- in-Lieu Fees. .' ,. , , , ' c , . ;' <, • 9. The applicant shall enter into a'mutuall./'~~~e~tabie'agre·~men{::'··.~·";:."··: .; with the Carlsbad Unified School District to provide for future ' :' school requirements that will result 'from the, .constrl,lction of these residences. ,10. All utilities, including electrical~ telephone and tefevision shall be installed underground and/or shall be completely co~cealed from view. " ' . ','. " . ",', ' . , 1/;. ·tjf( ',;jh'C"';';)' , . ~'. . ~ . . ." ,-.' .... -~ .' . " .: - -3- I' ! '" • ~'// fII ,ek,tI-, h. "/~~ BENTON ENGINEERING. INC. -, APPLIED SOIL MECHANICS -FOUNDATIONS';;;~C" -~>-:--e$a" 7· 73 3 6717 CONVOY COURT ~ ~4i' _. L-:-:J SAN DIEGO. CALIFORNIA 9211"1 .~ /O/lSfY73 PHILIP HENKING BENTON PRESIDENT -CIVIL ENGINEER R()bert D. Miller, Architect 6746 Magnol iQ Avenue RiversIde, CalJfornia 92506 SubJect:''''" Project No. 73-9-13D October 16, 1973 Fi na I Report on Compacted Filled Ground 21 Un it Apartmen t . Re~idential Community Ocean Street Carlsbad,. Cal ifQrnia Gent.lemen: TELEPHONE (714) 565-1955 RECEIVED o.CT17 1973 CITY of CARLSBAD Engineering Department This is to report the results of tests and obselYations made in order tq inspect the compaction of fUled ground placed on certain areas of the 21 Unit Apartment Residenfial Community located on the wesf side of Ocean Street between Grand Avenue and Elm Avenue, Carlsbad, California. The fills were placed during the period between September 21 and October 9, 1973. The approximate areas and depths of filled ground placed un.der our inspection in accordance with the approved specifications are shown on the attached Drawing No.1, entitled IILocation of Compacted Filled Ground.1I The plan used for the placement of filled ground was prepared by Robert D; Miller, Architect, dated Janu~ry 8, 197~. The approximate locations at which the tests were taken and the final test results are presented on pages 3 and 4, under the "Table of Test Results. II The laboratory determinations of the maximum dry densities and optimum moisture contents of the major fill materials are presented on page 4, under the II Laboratory Test Results." Some of the maximum dry densities shown in the "Table of Test Results" were combinations of these. The tests were taken during the weekly periods indicated below: Test Number 1 2 to 14, inclusive 15 to 35, inclusive 36 to 47, inclusive Week Ending September 21, 1973 September 28, 1973 October 5, 1973 October 9, 1973 (date of last test) & ProJect No. 73-9 ... 130 e Robert D. Miller, Architect • October 16, 1973 ~i The final results of tests and observations indicate that the compacted filled ground has been placed at 90 percenl...of the maximum-dry density or greater. The recommended safe allowable "95tiaring varues for property designed footings placed in the fill materials, compacted to at least 90 percent of mc;lximum dry density, are presented in our report submitted under Profect No. 72-2-26A entitled, IISoils /nvesHgation, 20 Unit Residential Communlty, West of Ocean Street Betw~en Grand Avenue and Elm Avenue, Carlsbad, California, II dated December ]9, 1972. It should be noted that during grading operations soft and spongy soils unsuitable in their natural conditibA' were encoyntered on a part of the site below the depths of the required removal and recompaction as originally expected. This material was excavated and then properly recompacted in aCC6rdanc~ with the approved filled ground grading specHications. The limits of the ov~r­ excavation are shown on the attached Drawing No.1. RespectfuHy submitted, BENTON ENGINEERING, INC. Reviewed by ~ ::; a~ . PhfiPH.BlltOn, C i~n-Erlgineer -> Distr: {2}Robert D. Miller, Architect (1) Marron Brothers, Inc. (1) City of Carlsbad Attention: Engineering Department DFL/PHB/meg BENTON ENGINEERING. INC. ,( Project No. 73-9-13D , -3-• October 16, 1,973 " , Robert D. Mil'Ier, Arch Hec ~ :1 TABLE OF TEST RESULTS '," Approx.,. Depth Maximum imate of Fill Fi.eld Dry Dry Test Location at Test Moisture DensHy Density Percent " No. Lo:t 1)10. in Feet % dry Ib/cu ft Ib/cu ft Compactedn Remarks 1 Building B 2.0 10.9 108.0 109.8 98.4- 2 Building B 4.0 6.4-105.7 109.8 96.2 3 Building B 2.0 9.7 116.8 125.1 93.2 4-Building B 4.0 11.0 113.5 125.1 " ,90.7 5 Building B 4.0 12.8 122 .. 3 125.1 97.7 6 ~uilding A 2.0 10.5 115.0, 125.1 ' 91.9 7 Building B 8.0 11.4 115.2 125.1 92.0 8 Building A 2.0 4.7 100.4 109.8 91.4 9 Building A 4.0 8.0 105.0 109.8 95.5 , 10 Building A 2.0 9.6 107.8 109.8 98.1 11 Building B 2.0 9.4 109.2 109.8 99.4 12 BuilCding B 4.0 7.9 116.2 117.5 98.9 13 Building A 2.0 11.8 1~18. 3 125.1 94.5 14 Building B 6.0 8.4 ] 12.9 125.1 90.2 15 Building A 2.0 8.2 ' 109.2 109.8 99.4 16 Building A 4.0 7.3 116.8 125.1 93.2 17 Building B 7.0 10.2 117. 1 125.1 93.5 18 Building A 6.0 6.3 117 ;8 125.1 94.0 19 Parking Deck 10.0 6.5 112.0, 116.0 96.4 20 Building A 5.0 12.3 114.8 125.1 91.7 21 Building A 6.0 9.6 120.6 125.1 96.3 22 Building B 3.0 10.3 114."8 125.1 91.8 23 Parking Deck 12.0 10.8 121.7 1'25.1 97.0 24 Parking Deck 14.0 10.6 118.0, 123.4 95.6 25 Parking Deck 16.0 11.7 117.9 125.1 94.2 26 Parking Deck 18.0 10.9 .?-120.7 121.8 99.0 27 Parking 'Deck 0.0* 2.2 110~6 116.0 95.3 2e Park i ng Deck 18.0 12.7 116!7 125.1 93.1 29 Building B 9.0** 10.3 112.9 125.1 90" 1 30 Building A 8.0** 9.2 108.8 125.1 86.8 Reworked 31 Paddng Deck 7.0 7.6 116.7 121.8 95.8 32 Building A 2.0 9.2 110.0. 117.5 93.6 33 Parking Deck "23.0 8.5 104.6, 12'1.8 85.9~ Reworked" ) 34 Building A '8.0** 8.5 111.9, 125.1 a9.4 --, Reworkecl 35 Parking Deck 23.0 8.9 106.9, 121.8 87.8 ~ Reworked 36 Parking Deck 10.0 8.5 105.3. 121.8 86.6 Reworked 37 Parking Deck 10.0 ' 9.5 108.9 121.8 89.4 Reworked 38 Parking Deck 10.0 10.3 113.6 121.8 93.2 Ck. on #36 & #37 39 Parking Deck 10.0 8.0 115.4, 121.8 94.9 40 Parking Deck 23.0 10.5 111.1. 121.8 91.2 Ck. on #33 & #35 BENTON ENGINEERING, INC. <f" ProJect No. 73-9-130' • , Robert D. Miller,. Archrte. -4- TABLE OF TEST RESULTS (CONT~) Approx-Depth Maximull) imate ' of Fill Field Dry Dry Test Location at Test Jv\oisture Density Density No. Lot No. in Feet % dry wt Ib/cu ft Ib/cu ft 41 Parking Deck 20.0, . 14.6 117.6 121.8 42 Parking Deck 2.0 11.1. 121.8 121.8 43 Parking Deck 1.0 10.1 114.6 121.8 44 Parking Deck 16.0 12.1 119.1 121.8 45 Parking Deck 15.~ 13. 'I 118.1 121.8 October 16, '1973 Percent Compaction Remarks ;: ~, . 96.5, _ 100.0 94.2 97.7 97.0 46 . Building A 8.0** 8.0 120.0 125.1 98.5 ek. on #30 & #34 47 Parking Deck 17.0** 7.5 114.8 121.8 94.3. * -fndicates tests taken in natural ground ** -Indicates tests taken in subgrade LABORATORY TEST RESULTS The ma~imum dry densities and optimum moisture contents of the major fill materials as deter- mined by the A.S. T .M. D-1557-70 method, that uses 25 blows of a 10 pound rammer falling from a heigh't of 18 inches on each of 5 ~ayers in a 4 inch diameter 1/30 cubic foot compa~ti(;m cylinder, are presented as follows: Soil Description Light gray fine sand Light gray fine sand with slight clay binder Yellow-brown slighfly clayey fine to medium sand (Import) Light red-brown fine sand with slight clay binder Maximum' Dry Density Ib/cu ft 109 .8 116.0 12,1.8 125.1 BENTON ENGINEERING, INC. Optimum Jv\ois- ture Content % dry wt 15.4 12.9 11.1 9.1 I;"