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Home My WebLink AboutX2016-3766 - Soils (3)X,2016- 3766 Zy01 A 14 V's la Dr MILLER GEOSCIENCES, INC Environmental and Geotechnical Services July 22, 2019 M16-601-1 Joshua Pukini Cal Pac Capital 3700 Campus Dr. Newport Beach, CA 92660 Subject: Final Grading Report, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California Reference: 1) Preliminary Engineering Geologic and Geotechnical Exploration, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., M16-601, dated 6-14-16 2) Response to City Review Letter, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., M16-601-1, August 22, 2016. 3) Rough Grading Report, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., F16-601, dated 4-12-17. Introduction Pursuant to your request, this letter serves as a final grading report for the proposed construction. The site preparation phases of the project in the area of the proposed residence has been completed. Grading Procedures During the site preparation phases of the project, the grade of the lot was then lowered by about 12 inches to remove any planter fill and organic landscape material. On March 23, 2017, it was observed that the proposed building surface exposed natural sand and silty sand as encountered in our borings. Most of the excavated material was removed from the site. Minor amounts of the cleaner sand remained around the perimeter of the 23890 Copper Hill Dr. #111, Valencia, California 91354 *(661)299-2206 * millergeosciences@gmail.com 7-22-19 2401 Alta Vista Page 2 F16-601-1 residential area. No artificial fill was placed for primary or secondary structural support during the site preparation. Subsequently, no compaction testing was conducted. The natural soils exposed surface support of the completed residence. In August of 2017, a retaining wall was added on the plans on the south facing slopes so that a spa could be built. The wall footings were observed and approved and the wall was constructed. A sub -drain was placed behind the wall and the spa was constructed. An excavation was then made for the spa and the area between the spa and the wall was backfilled with concrete durign the construction of the spa. The remainder of the wall was backfilled with a %-inch gravel, capped with 2 feet of compacted fill. The compacted fill was tested for relative compaction at the slab sub -grade surface. The fill exeeded the required 90 percent relative compaction as recommended in our referenced reports. A 4 inch concrete slab, reinforced with #3 bars placed 16 inches on -center, in two directions, was constructed on top of the compacted fill. Final drainage around the site is collected by eave drains and down spouts direct the roof drainage to the yard drain system. The yard drains outlet to the street. Foundations Building and retaining wall foundations are supported on native soil suitable to handle the bearing loads. Foundations were designed in accordance with recommendations found in our referenced report. Reaulatory Compliance Conditions encountered during the grading operations were essentially as anticipated in the original investigation. Based on our observations, the grading procedures were conducted in compliance with City regulations. If you have any questions, please call. Respectfully, MILLER GEOSCIENCES, VevenExp. 7-31-21 No. 1303 • Exp.7-31-21 eona�a GE386, Exp., 9-30-19 No. 386 Exp. 9-30-19 MILLER GEOSCIENCES, INC. —13890 Copper Hill Dr., 4111 Valencia, California 91354 *(661) 299-2206* millergeosciences@gmail com MILLER GEOSCIENCES, INC Environmental and Geotechnical Services August 20, 2019 F16-601-2 Joshua Pukini Cal Pac Capital 3700 Campus Dr. Newport Beach, CA 92660 Subject: Final Grading Report, Two-story Residential Construction, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California Reference: 1) Preliminary Engineering Geologic and Geotechnical Exploration, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., M16-601, dated 6-14-16 2) Response to City Review Letter, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., M16-601-1, August 22, 2016. 3) Rough Grading Report, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., F16-601, dated 4-12-17. Introduction Pursuant to your request, this letter serves as a final grading report for the proposed construction. The site preparation phases of the project in the area of the proposed residence has been completed. Site Development Procedures During the site preparation phases of the project, the grade of the lot was lowered by about 12 inches to remove any planter fill and organic landscape material and loose debris from the demolition of the original residence. On March 23, 2017, it was observed that the proposed building surface exposed natural sand and silty sand as encountered in 23890 Copper Hill Dr. #111, Valencia, California 91354 * (661)199-2206 * millergeosciences@gmaitcom 8-20-19 Page 2 2401 Alta Vista F16-601-2 our borings. Most of the excavated material and debris was removed from the site. Minor amounts of the cleaner sand remained around the perimeter of the residential area. No artificial fill was placed for primary or secondary structural support during the site preparation. Subsequently, no compaction testing was conducted. The natural soils exposed surface support of the completed residence. Footings for the residence were observed and approved by this firm on April 6, 2017. In August of 2017, a retaining wall was added on the plans on the south -facing slopes so that a spa could be built at pad g rade. The wall footings were observed and approved on November 17, 2019. The wall footings extended into native soil as recommended. Once constructed, a sub -drain was placed behind the wall and the narrow portion of the wall was backfilled with a %-inch gravel up to within 3 feet of finished grade. Compacted fill was then placed behind the wall up to the finished sub -grade to cap the gravel. On June 22, 2018, the bottom excavation for the spa was observed and approved by this firm and compaction testing of the wall backfill was conducted. Results of the compaction testing are provided on Table 1. The excavation for the spa was then backfilled with concrete for construction of the spa. Testing of the compacted fill yielded results that exeeded the required 90 percent relative compaction as recommended in our referenced reports. A 4 inch concrete slab, reinforced with #3 bars placed 16 inches on -center, in two directions, was constructed on top of the compacted fill. The slab was poured on August 8 and 9, of 2018. Recently, we were informed that the final grading report needed to include compaction testing for the utility lines. On August 8, 2018, the City inspection provided approval to pour the slab without requesting any compaction testing of the utility trenches, inferring that testing was not required for the utility trenches. Subsequently, a visit was made to the site to test the fill in the utility trenches on August 13, 2019. The surface of the site was reviewed with the contractor indicating where the utility lines were placed. The areas were then probed to verify the trench locations. The backfilled trenches are 2 to 3 feet deep. Tube samples were then obtained to evaluate the compaction of the trench backfill. Four additional tests were obtained. The results are provided herein. Test results MILLER GEOSCIENCES, INC. —23890 Copper Hill Dr., #111 Valencia, California 91354 *(661) 299-2206* millergeosciences@gmaiLcom 8-20-19 Page 3 2401 Alta Vista F16-601-2 indicate that the utility trenches were properly compacted. Grading Procedures Grading equipment used for compacting the fill included gas -powered compactors. A local source of water was applied as required to obtain near -optimum moisture conditions. No seepage pits, groundwater or subsurface cavities were encountered during soil removal. All bottom excavations were observed by our representative to verify that all loose, surficial soils were removed to dense, native terrace deposits. All bottoms were then scarified, rolled to a firm, unyielding surface, and compacted to a minimum of 90 percent of the maximum laboratory density. Onsite soils were placed in 6 to 8 -inch lifts and tested every 2 feet of elevation or every 500 cubic yards of fill placed, whichever was applicable. Compaction testing was performed in accordance with the in-place density test standard ASTM D1556 of D2937, whichever was applicable. Areas which did not meet the 90 percent compaction requirement were reworked and recompacted to required compaction standards. Soil types used for compacted fill were tested to determine the maximum density and optimum moisture in accordance with ASTM Method D1557. Laboratory test results are presented in Table II. Foundations Building, retaining wall foundations and the spa are all supported on native soil suitable to handle the bearing loads. Foundations were designed in accordance with recommendations found in our referenced report. On -grade Slab Preparation The soils on the site are primarily well -sorted sand. Interior floor slab sub -grades were prepared on top of the natural soil by placing a sub -grade consisting of 2 inches of sand placed over a 15 mil vapor barrier, over 2 more inches of sand, over 4 inches of 1/2" of larger clean aggregate. All interior utility trenches were filled with the similar materials and the sub -grade materials were wetted prior to pouring concrete. Floor slabs placed have a 4" nominal thickness with #3 reinforcement bars placed 16 inches on -center, both ways. MILLER GEOSCIENCES, INC.-- 23890 Copper Hill Dr. #111, Valencia, California 91354 *(661)299-2206 * millergeasciences@gmai1.COM 8-20-19 2401 Alta Vista Final Site Drainage Page 4 F16-601-2 Final drainage around the site is collected by eave drains and down spouts that direct the roof drainage to the yard drain system. The yard drains outlet to an on-site runoff retention system using one, 31 -foot long gravel bed at the toe of slope adjacent to Alta Vista and one, 24 -foot long gravel bed at the toe of slope and adjacent to Alepo Street as approved by the City. Drainage on the slopes sheetflows towards the street. Regulatory Compliance Conditions encountered during the grading operations were essentially as anticipated in the original investigation. Based on our observations, the grading procedures were conducted in compliance with City regulations. If you have any questions, please call. Respectfully, MILLER GEOSCIENCES, INC. V AMiller ,Exp. 7-31-21 No. 1303 Exp. 7-31-21 �i eonard C, Hayes GE386, Exp., 9-30-19 No. 386 Exp. 9-30-19 MILLER GEOSCIENCES, INC. —23890 Copper Hill Dr., #111 Valencia, California 91354 *(661) 299-2206*millergeosciences@gmaii.com 8-20-19 2401 Alta Vista TABLE SUMMARY OF FIELD DENSITY DETERMINATIONS TEST STANDARD ASTM D1556 or D2937 Page 5 F16-601-2 Test # Date Soil Type Elevation (feet) Location Dry Density (pcf) Moisture Content N Relative Compaction N 1 6-22-18 SP 193 See Plan 115.6 13 98.4 2 6-22-18 SP 195 114.7 12 97.6 3 8-13-19 SP 190 112.5 10 95.7 4 SP 193 111.7 10 95.1 5 SP 189 112.9 11 96.1 6 SP 196 113.8 9 96.9 TABLE II LABORATORY DENSITY DETERMINATION ASTM D1557-90 Soil Type Maximum Dry Density (pcf) Optimum Moisture Content (%) I 1 117.5 12 MILLER GEOSCIENCES, INC. —23890 Copper Hill Dr., #111 Valencia, California 91354 *(661)299-2206*millergeosciences@gmaii.com 8-20-19 2401 Alta Vista Page 6 F16-601-2 ENGINEERS'S CERTIFICATE OF COMPLIANCE FOR COMPACTED EARTH FILLS LEGAL DESCRIPTION: Lot 65, Tract 4705, APN 440-032-03 ADDRESS: 2401 Alta Vista Drive, Newport Beach, California SOIL TESTING AGENCY: Miller Geosciences, Inc. PROPERTY OWNER'S NAME: Cal Pac Capital Attn: Joshua Pukini OWNER'S ADDRESS: 3700 Campus Dr. Newport Beach, CA 92660 AREA TESTED: See Plot Plan, Plate 1 PER REPORTS ON OUR PROJECT NO: M16-601 DATE WORK STARTED ON PROJECT: 3-23-17 DATE FILL WAS COMPLETED: 8-13-19 DATE OF THIS DECLARATION: 8-20-19 TO THE SUPERINTENDENT OF BUILDING: *1 hereby declare that I have personally tested the placing of compacted earth fill on the above described property. It is the professional opinion of the licensed engineering that the observation and t s conducted are consistent with sound engineering practices and incorporate ap g&Q, des, ordinances and regulations. J9-30-1 - ' �) Leonard C. Hayes, GE 386 Expiration Date: 9-30-19 *To "have personallyy oUs—erved and tested" shall include observation and testing per- formed by any person responsible to the licensed engineer signing this certificate. Where the observation and testing of the work above is delegated, responsibility shall be assumed by the licensed engineer whose signature is affixed thereon. MILLER GEOSCIENCES, INC. —23890 Copper Hill Dr., #111 Valencia, California 91354 *(661) 299-2106* millergeosciences@gmaibcom �bbbbbbbbb b b b bb bbd bbbb� 1� r i k? s� V"i VF ke Ig'}Y - a>ggk �Xg 1 �r g � Y a I s� � s a J,STAEETas� a ALEPPOgi SIR Q pFp.ptptp� y 'fit MILLER GEOSCIENCES, INC. Environmental and Geotechnical Services April 12, 2017 F16-601 Studio Z Consulting 4521 Campus Drive, Ste., 234 Irvine, CA 92612 Attn: Richard Denzer Subject: Rough Grading Report, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California Reference: 1) Preliminary Engineering Geologic and Geotechnical Exploration, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., M16-601, dated 6-14-16 2) Response to City Review Letter, Proposed Two-story Residence, Lot 65, Tract 4705, APN 440-032-03, 2401 Alta Vista Drive, Newport Beach, California; Miller Geosciences, Inc., M16-601-1, Aug ust22, 2016. Introduction Pursuant to your request, this letter serves as a rough grading report for the proposed construction. The site preparation phases of the project in the area of the proposed residence have been completed. Grading Procedures During the site preparation phases of the project, the grade of the lot was lowered by about 12 inches to remove any planter fill and organic landscape material. On March 27, 2017, it was observed that the proposed building surface exposed natural sandand silty sand as encountered in our borings. Most of the excavated material was removed from the site. Minor amounts of the cleaner sand remained around the perimeter of the residential area. No artificial fill was placed for primary or secondary structural support 23890 Copper Hill Dr. #111, Valencia, California 91354 * (661) 299-2206 * millergeosciences@gmaiLcom 4-12-17 2401 Alta Vista Page 2 F16-601 during the site preparation. Subsequently, no compaction testing was conducted. The natural soils exposed surface is considered suitable for support of the proposed structure. If you have any questions, please call. Respectfully, MILLER GEOSCCIENCES, INC. U" 2ven B. Miller CEG1303, Exp. 7-31-17 No. 1303 * Exp. 7-31-17 eonard C, Hayes GE386, Exp., 9-30-17 0 No. 386 Exp. 9-30-17 0 MILLER GEOSCIENCES, INC. —23890 Copper Hill Dr., #111 Valencia, California 91354 *(661)299-2206*millergeosciences@gmaii.com From: X20J6 � 3766 9140 6 A If a V;s$a ®r CITY OF NEWPORT BEACH COMMUNITY DEVELOPMENT DEPARTMENT BUILDING DIVISION 100 Civic Center Drive I P.O. Box 1768 1 Newport Beach, CA 92658-8915 www.newportbeachca.gov 1 (949) 644-3200 CIVIL ENGINEER'S CERTIFICATION FORM Date: L(. S Eo tvee6'nc,)) Inc, + �',h y (o Z8 N EG-kho4 S&+rcc`t" Ofc,- rqe) CA 9&f3bD ATTENTION: GRADING ENGINEER, BUILDING DIVISION GPC No.: Tract/Subdivision/Lot No.: (o 5 Rough: _Final: X Project Names: Z4(21 Au -FA V 1 STA b021V E Owner/Developer: Type of Project: Notes: Tract: Drainage J OQQ`O�FpELSSIpNA'.. �Q� E,� ' gy�Fyc� _ Commercial _ Otherf / y _ Industrial _ W Q No. 44931 6 a'1 Yardage for Protect: Notes: 50 Cut: Borrow: l a` QFill: So Export: FCAI I hereby approve the grading for this project in accordance with my responsibilities under the City Grading Code. I have inspected the project and hereby certify that all areas exhibit positive surface flow to public ways or City approved drainage devices. The grading has been completed: in conformance with, X with the following changes to the approved grading plan. Description of Changes: 744E ADD)T)9r4 or b-AAvi7Y Rt:7A)M)14b WALLS ALV I,- -TW5 RIbNT-of-WAY; •THFC�A7T)).!! A"_0 ER,D R,IYC)1(46 nt= �rNt FL24-r .AIf�D GiD6_ YARDSTNF ns FT117 ) ; WE aAA 7T[si'S AMD R15- COW FI(, -V. iNATt OF fa)E ?1Sg5t�, l�irr. Company: Name: L r Crt e5 c r,ct)X. ; Qr U L�5-- — - - ofint) V V1 T .0, n ,��, License No.: a 4`f 3 1/ 8 6 (RCE/LS) �rm9YAvl1 Cn01nwro GeMICBnon roan H iu LGS Engineering, Inc. 628 N. Eckhoff Street • Orange, CA 92868 Tel: 714.385.0017 6 Fax: 714.385.0019 Engineering Inc., May 14, 2018 18-128 City of Newport Beach Building Division 100 Civic Center Drive P.O. Box 1768 Newport Beach, CA 92658-8915 Attention: To whom it may concern Subject: Change of Civil Engineer 2401 Alta Vista Dear City of Newport Beach, Please accept this letter as confirmation that I, Loren Sandberg, P.E., P.L.S., President of LGS Engineering, Inc. will accept responsibility to complete the project at 2401 Alta Vista Drive based on the approved drawings prepared by Mr. Will Rolph, P.E., President of Civil Scapes Engineering. I have reviewed the approved drawings and found them lacking in detail as to how construction was to be accomplished. And given the current as -built condition, fail to see how the city's requirements for water quality improvements can be accomplished without revision to the currently approved plans. I have prepared the attached sheet as a supliment to the approved drawings, addressing how to incorporate the required infiltration trenches into the proposed storm drain system. The revision also includes a minor change to the site walls and the addition of a spa per the owner's request. I reserve the right to make additional revisions as additional plan deficiencies are discovered. If you have any questions or concerns, please feel free to call me. Sincerelyyy, ?