SW_Review_Comments.pdf
City of Edmonds
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121 5 AVENUE NORTH
EDMONDS, WA 98020
(425) 771-0220
FAX(425) 771-0221
Website: www.ci.edmonds.wa.us
DEVELOPMENT SERVICES DEPARTMENT
Planning Building Engineering
Stormwater Review Comments
Permit : Date:
# BLD20070594 08/02/2007
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Project Name/Address:
Pinsoneault New SFR/820 9 Avenue S.
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Contact Person/Address/Fax: ____________
James Pinsoneault 820 9 Avenue S.
_____________________________________________
Edmonds, Wa 98020
Reviewer: Division: Engineering
Blaine Chesterfield
During review of the subject submittal it was found that the following information,
corrections, or clarifications will need to be addressed:
1.soils
Per the 1998 Surface Water Design Manual Section 5.1.1. Item 1. A
report
must be prepared by a geotechnical engineer. The report must
reference a sufficient number of soils logs to establish the type and limits of
soils on the project site. The report should at a minimum identify the limits of
any outwash type soils(i.e., those meeting USDA soil texture classes ranging
from coarse sand and cobbles to medium sand) versus other soil types.
2.
Per the 1998 Surface Water Design Manual Section 5.1.1. Item 3. On lots or
sites containing outwash type soils (coarse to medium sand), additional site-
specific testing must be done. Individual lot or site tests shall consist of at
least one soils log, a minimum of 4 feet in depth (from proposed grade),
identifying the SCS series of the soil and the USDA textural class of the soil
horizon through the depth of the log, and noting any evidence of high
groundwater level, such as mottling, Note: This testing is also required on
lots or sites where downspout infiltration is being proposed in soils other than
outwash.
3.
Show infiltration rate for each test hole. Rapid is not as precise a unit of
measurement as what is needed in the soils report.
4.
Some analysis is needed to show that the infiltration rates will be adequate to
handle the volume and flow rates for the 100-yr event.
Please resubmit three copies of the revised plans/documents to a Development
Services Coordinator. You may contact me at 425-771-0220 if you have specific
questions regarding these plan corrections.