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Chang Geotechnical Final Inspection Report.pdfLIU & ASSOCIATES, INC. Geotechnical Engineering Engineering Geology . ... ...... - ... .... ... .. June 11, 2015 Dr. Lieh Ching Chang 17134 Talbot Road Edmonds, WA 98026 Dear Dr. Chang: Subject: Geotechnical Final Inspection Report Chang Residence 17134 Talbot Road Edmonds, Washington Edmonds Permit Noi. BLD2013,0190 L&A Job No. 12-083 Earth Science We provided geotechnical inspection services for the subject project since its start in August 2013. The items we monitored and inspected include: 1) temporary erosion control measures implemented during grading of the site, 2) verification of footing bearing soil, 3) footing drain installation, 4) infiltration trench installation for disposing water in footing drain, 5) rain garden , 6) concrete block wall construction, 6) final grading, landscaping and peri anent erosion control. The footing drain infiltration trench was found sifted and plugged and was reconstructed. The rain garden pit was backfilled as a tightline has been installed to convey collected storm runoff over roof and paved driveway through a tightline which is tied to the north neighbor's storm drain line, a revision that was approved by the city. The disturbed area on the bluff is backfilled, re- seeded, and covered with jute matting. 19213 Kenlake P,lace NE - Kenmore, Washington 980 Phone (425) 483-9134 - Fax (425) 4861-2746; June 11, 2015 Dr. Jackie Chang L&A Job No. 12-083 Page 2 A small portion of the con, had exceeded the allow heij of blocks so that the entire concrete block wall and an, backyard only covers a sma The thickness and quantity e block wall installed along the south boundary of the site of 3 feet. This has been corrected by removing the top row ,11 is not more than 3 feet tall. The fill placed behind this concrete block wall about 7 feet west of the deck in the portion of the 35 feet setback area from the top of the bluff. the fill are small that it, is our opinion that it will have no impact on the stability of the bluff. Our Daily Field Reports I It is our opinion that the compliance with city 1.2 for this project are attached hereto for your review. ical construction of the prqiect is substantially in plans and specifications and subsequently approved revisions. Please contact us if you have questions. Attach.: Daily Field Reports 1l through 12 Yours very truly, LILT SSOCIATES, INC. A J. S. (Julian) Liu, Ph.D., P.E. Consulting Geotechnical Engineer DAILY FIELD REPORT' Edmonds Permit No. �BLD20130190 LIU & ASSOCWFE�S, IN C. J01) NO, F1eFd-FqV---- 7,3-(g—e-- - 7e—P on 700 12-083 J. Liu I of 1 1 Geowhnic,M higinecring. EA) ering Gcoh gy & Lard) tc�eiw Mies es Tire—Cli—site--Ca-te---E5ay—of-VV—eek— 32 2:15P 8113/2013 "rues, 19213 KNIlake Pkwe NE 7 e —off — - ------ Kenmore. Waslflngtoll 19,8028 0.75 2:35P SLinny Phone: (425) 483-9134 Fax: (4 5)1 486-2-46 VeNde Hr�--on 3 7te—'R—rsCF—arged 7s70rs iawwmw,1.25 Chano Residence 7,e�ieral —contractor ion 17134'Talbolt Road, Edmonds 'Jackie =ent Chang GeneFgl Contractor Proj. ManaQer Bedrock Groh r), Inc. At the reque.sl by �h�� aonternporary erosioncontrol,t the timeof my site Osit, [lie eistirigouseon �ot has been demolished nd B�edrock Group has a backhoe and operator onsfte to rernove debris of the torn down house off of thb w site . A silt fence �s erected along the donhill (the north, south and west sides) of the backyard behind the footP rinMe, 't of dernolished house. The backyard is covered by overgrown grass and brush, There is no signs of erosion within the site. Based on my onsite observation, it is rty opmnio�O that lrnplemented temporary erosion control fne asure is acceDtable �opy ro,, 1) Jackie Chang 2) City oEl on Edmonds on NextConfinued 3) 4) Page ���. �1�I �'l�i'�. w � `�` � �� ;� DAILY FIELD REPORT dmoinds Permit No. BLD20130190 L.1U &ASSOCIATES,11AC. 12-083 J(LiU-N-t— 1 of 1 4 . .... . . ...... ... - Geotechn i cat Engineering, Engineering Geology & Earth Science Miles Time 06 Site Date Day of Wee 32 10:30A 11/2612013 Tues.. 19213 Kenlake Place NE Travel Time (Hrs) Time Off Site Weather Kenmore, Washington 98028 &75 11.'05A sunny Vehicle Hrs on Site H,rs Charged Visitors Phone: (425) 483-9134 Fax: (425) 486-2746 1.25 Chang Residence 17134 Talbot Road, Edmonds Jackie Chang General Contractor General Contractor Proi. Manager Received Unchecked By Aziz Aziz Earthwork Contractor Earthwork Contractor Supt. Received Checked By Bedrock Group, Inc. At the request of D,r. Chang, I come on site to observe condition of the site, as a complaint had been made to City of Edmonds concerning loose soil deposited along the north boundary of the project site whiich could be washed onto the ... .... ..... . . . . . . .... .. . ... .... .... ........ .. . neighboring property by storm runoff. It appears that most of the soil excavated out from building footprint excavation is stockpiled at the east end of the project site. Minor amount of loose soil, mostly not more than a foot high, has been placed along the boundary line of the site. .. . . .... . .... Gontlnued 1) Jackie Chang 2) City of Edmonds on Next 3) Aziz 4) Pane GRUMMUMlr r �r ASSOCIATES, INC. 12-083 J. lu 1of 1 6 Geoicchnical t:n,,gineeringE;ngineeTing Geology & Ianh Science Miles Time On Site (Gate 4ay o 4Pu 32 1030A 12/12/2013 Tht 19213 Kenlake Place NE Travel Time (Firs) Time OF Site weather Kenmore, Washington 98028 0.76 11:00A Cloudy Visitors Phone: (425) 483-9134 Fax.: (425) 486-2746 Vehicle Hrs on Site Hrs Charged 1.2611 roie o ocatson uen Chana Residence 17134 Talbot Road, Edmonds I Jackie Chano Aziz (Aziz By The ground behind the house descends gently westward towards the bluff. The spreader pipe dispersion systems to be installed along the north and south boundaries of the site would be about 6 inches off the ground at their east ends and some 2.6 to 3 feet off the ground at their west ends in order to remain level. The spreader pipes are to be supported on 2 -inch galvanized steel pipe piles spaced at no more 8 feet on centers and driven at beast 6 feet into the ground. The downspouts at the NW and SW corners of the house may be tightlined to connect to the east ends of the spreader pipes. The west ends of the spreader pipes should be capped. Aziz try to dig a trench to anchor the new silt fence installed along the edge of neighbor's gravel driveway. The ground is still frozen and hard to dig. I told Aziz that if the neighbor's driveway is lined with a layer of filter and covered'' with 2 -inch crushed rock as I recommended in my previous Daily Field Report, the silt fence can then be eliminated. Aziz covers the storm inlet at the end of the oint-use drivewav with a filter sock. ® Continued' 1') Jackie Chang 2) City of Edmond's on Next 3) Aziz 4) Page Geotechnical Engineering, Engineering Geology & Eit�clelice 32 19213 Kenlake Place NE Travel Tir Kenmore, Washington 98028 O 75 Phone: (425) 483-9134 Fax: (425) 486-2746 Vehicle H ..... ..... 7r `Mj e� � cation Chang Residence 17134Talbot Rued, UM cwl�� I of 1 1 7 , MI, Aziz try to ga trench to anchor the new silt fence installed along the edge of neighbor's gravel driveway. The .......... . .. .. .... ...... . . . ........ . ....... *round is still frozen and hard to dig. 11 told Aziz thatif the eighbor's driveway is lined wit�h a layer of filter and I n . .. . ................. . ... .. .... . covered with 2 -inch crushed rock as I recommended in my previous Daily Field Report, the silt fence can then be ................ ... ... . .... . .... . Miminated. with a filter sock, 0 Continued 1) Jackie Chang 2) City of Edmonds on Next 3) Aziz 4) 1 Pane LIU & ASSOCIATES, INC. 12-058 .-6eote--c-lini—cal-Gnginecriiig, Engineering Geology& Ea I rt I hSc . le .. n . cc Miles . . .. . ................. 32 19213 Kenlake Place NE Travel Time (I - Kenmore, Washington 98028 0 0.75 Phone: (425) 483-9134 Fax. (425) 486-2746 Vehicle Hrs on dmonds Permit No. IBLD20130190 r i eC�,K, ,cep Mage Rep—off 1116, J. JU 1 of 1 8 Time On r3ite Date — --ga-y of —Week 2:30P 10/812014 Wed. Time Off bite Weather 3:05P Sunny HisCharged lVisitors 1.25 1 Chang Residence 17134 Talbot Road, Edmonds Jackie Chang General Contractor General Contractor Proj. Manager Received unchecked By Aziz Aziz Earthwork Contractor Earthwork Contractor Supt. Received Checked By Bedrock Groue�, Inc. Atthe request of Aziz, I come onsite to meet with him and a city"s inspector to discuss footing drain: and stormwater .. . .... ...... . . . ............ .. .. . . .......... . . . . . . .............. . . . ....... .......... . . . ... . ....... disposal systems of the subiect oroiect. The city's inspector l exappears to not a good understanding of how the systems should be installed. So, plain to .. . ......... . - X - - ''-- " both Aziz and city's inspector on construction of infiltration trench for disposing water in footing drain, the rain garden . . .... ......... .... - on the east side of the garage and the spreader pipe dispersion system along the north and south side of the backyard .. . ........... .. .. . .......... . . . - . ...... . . .. ............. .... to dispose roof runoff. The, footing drain infiltration trench has been half completed with the perforated dispersion pipe placed in the trench . ........ . ....... - . ..... . . .... - and partially covered with washed gravel. I inform Aziz that the dispersion pipe should be covered by at least 6 inches .. ......... ... .. . ....... .. of washed gravel over the top of the pipe- He says he will have that corrected. El Continued 1) Jackie Chang 2) City of Edmonds on Next 3) Aziz 41 1 ppnin A�W MM M'- I LIU & ASSOCIATES, INC. Geotechnical Engineering, Engineermg-Geology & Tarth Se-Reunce- 19213 Kenlake Plac:e NE Kenmore, Washington 98028 Phone: (425) 483-9134 Fax- (425) 486-2746 Mr`= M W�l Wlllff-.MArAUllZMLU� An 11 TOM ueneral Contractor Proj. Manager Aziz J211ow 0 Continued 1) Jackie Chang 2) C4 of Edmonds on Next 3) Aziz 4) 1 Pqnp LIU & ASSOCIATES, INC. cal Engincerhag, Engineering Geology & Eardi Science . . .......... . — . .. .... ......... . ....... . .... . ... 1,9213 Kenlake Place NE Kenmore, Washington 98028 Phone: (425) 483-,9134 Fax: (425) 48 46 ,Ctanq.B.esidence F -IM FF= - At the request of Dr. Chang, 1 come o,nsite today to observe condition of runoff o I . . . . ......... At the time of my site visit, the site is almost corn !etel� -p covered by plastic tarp. Some runoff over the tarp is flov, . .... ... . . . ............. . ..... ..... towards the bluff as the site declines westerly to the bluff. A few sandbags have been placed over the plastic tarp as hold-downs. More sandbags should be - I . . ......... .... . .... . ...... . . . ....... . ..... . they can be walked on for observation of condition; of the entire site. RV Continued 1) Jackie Chang 2) City of Edmonds on Next 3) A2jz Jallow 4) PAnP