APPROVED BLD2022-0462+TESC-DEWATERING_ PLANS+6.3.2022_5.15.46_PM+2911890Dewatering Layout/Erosion Control Notes I
Permit Application No. BDL2022-0462
23625 84th Avenue West, Edmonds
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238th Street Southwest
NOTES: Water will be pumped from excavation and conveyed to storage tank using HDPE or PVC pipe. OWNER/CONTRACTOR IS RESPONSIBLE FOR
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BLD2022-0462
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RESU B
Jun 06 2022
".� CITY E
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SERVICES
_ DEPARTMENT
Water will be transported off site for recycling/treatment at fully -permitted facility located in Seattle. EROSION CONTROL AND DRAINAGE ALL DISTURBED SOILS SHALL BE A roximate Scale: 1"- 50'
pp
Erosion control will consist of visgqueen sheeting for stockpile(s) and CB inserts
COMPOST AMENDED PER CITY OF
EDMONDS STANDARD DETAIL SD-642 OR
APPROVED EQUAL. 0 25 50
100 N
= See Figure 2
Applicant shall repair/replace all
Corporate Office Edmonds Terrace Development
Figure 1
= Test probes in vicinity of Remedial Excavation Site by RGI, 02 22
/
damage to utilities or frontage
improvements in City right-of-way
per city standards that is caused or
17522 Bothell WayNortheast
oreasRGI Project Number:
� Bothell, Washington 98011 Dewatering Erosion Site Plan
Date Drawn:
— =Approximate Property boundary
occurs during the permitted project.
2021-847-2 06/2022
Phone: 425.415.0551
KEYERUP
Fax: 425.415.0311 Address: 23625 84th Avenue West, Edmonds, Washington
98026
mom
1 LW
RILEYGROUP
June 1, 2022
Liu Brothers LLC
1641 Evergreen Point Road
Medina, Washington 98039
clo Lobsong Dargey — Anandacom
Subject: Response to City of Edmonds Comments
Terrace Place Edmonds
23625 84th Avenue West
Edmonds, Washington 98026
RGI Project No. 2021-847-2
BLD2022-0462
RESUB
Jun 06 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
References: Geotechnical Report, prepared by The Riley Group, Inc. dated April 12, 2022
Review Comments, prepared by City of Edmonds dated May 24, 2022
Dear Mr. Dargey:
As requested, The Riley Group, Inc. (RGI) has evaluated the impact to the neighboring property
and provided response to Comment #3.
Comment #3. Provide a profile showing that the excavation will not impact the neighboring sites
and structures.
RGI Response: The proposed remediation excavation is about 10 feet from the property line and
14 feet from the building. The maximum depth of the excavation will be about 15 feet deep and
most of the excavation will be in very dense glacial till.
The bottom of the excavation will be above the projected 45 degree line from the building
foundation. Therefore, the proposed remediation excavation will not affect the neighboring
building. When the excavation extends to the bottom 5 feet, it will be below the projected 45
degree line from the property line. Since the native soil is very dense and the excavation will last
very short time, RGI doesn't believe that it will have any impact to the stability of the property.
We trust the information presented is sufficient for your current needs. If you have any questions
regarding this letter report or require additional information, please call us at (425) 415-0551.
Sincerely,
THE RILEY GROUP, IN(
Ricky R. Wang, PhD
Principal Engineer
Attachment: Excavation Profile
Corporate Office
17522 Bothell Way Northeast
Bothell, Washington 98011
Phone 425.415.0551 4 Fax 425.415.0311
6l!/ZozZ
www.riley-group.com
2-Story
Commercial P.L.
Building
Concrete slab -
on -grade
IT
Footing
ND
350 ug/L \
Surcharge Zone
Looking North
Grass
TP6A
51 Clean Soil Overburden
—, __[ — —
17.5' bgsl
17.5' bgs \ 20'
45'
Pybu ppm
170,000 u
BLD2022-0462
P.L.
6'
Depth to
Groundwater
15'
Depth to Remedial
Excavation
= Remedial Excavation & Dewatering
Diesel -range total
Petroleum Hydrocarbon
Contaminated Soil & Perched Groundwater
m (in blue) = Diesel Soil concentration (mg/kg)
♦ (in red) = Diesel groundwater concentration (ug/L)
ND = Not detected at the analytical laboratory Practical Quantification Limit (PQL)
RESUB
Jun 06 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
Approximate Scale: 1"= 10'
0 5 10
20 N
Corporate Office
Edmonds Terrace Development
Figure 2
17522 Bothell Way Northeast
Bothell, Washington 98011
Phone: 425.415.0551
RGI Project Number:
2021-847-2
Cross -Section A -A'
Date Drawn:
06/2022
ILEY
Fax: 425.415.0311
Address: 23625 84th Avenue West, Edmonds, Washington 98026