Report George Heimos
From: Ken Lee <kenichiro7 @gmail.com>
Sent: Thursday, September 18, 2014 10:23 AM
To: George Heimos
Subject: Fwd: PLM2013-00418, Storm Line for Parking Lot at Lee Office Building
Follow Up Flag: Follow up
Flag Status: Flagged
Good morning George:
I am forwarding this compaction report from Mike Baker of GeoPacific for the ADS pipe used in our 68th
Parkway project. Is this sufficient or do you need a more formal report from Geopacific to approve the storm
system?
Scott Ranes is still trying to get his camera contractor to re-shoot video of for the failed section of the system. I
will call in an inspection as soon as that is completed.
Thank you I � 03 5-11(j 6Y(-4" Pk /
Ken Lee
503-347-5605
Forwarded RECEIVED
From: Mike Baker<mbaker @geopacificeng.com> C/L�' D
Date: Thu, Sep 18, 2014 at 9:59 AM
Subject: Storm Line for Parking Lot at Lee Office Building SEP 1 8 2014
To: kenichiro7 @gmail.com
CITY OF TIGARD
BUILDING DIVISION
Hi Ken,
All of the relevant sections in the manufacturer's handbook appear as so
Installation
Installation shall be in accordance with ASTM D2321 and ADS recommended installation guidelines, with the
exception that minimum cover in trafficked areas for 4- through 48-inch (100 to 1200 mm) diameters shall be
one foot. (0.3 m) and for 60-inch (1500 mm) diameters, the minimum cover shall be 2 ft. (0.6 m) in single run
applications. Backfill for minimum cover situations shall consist of Class 1 (compacted), or Class 2 (minimum
90% SPD) material. Maximum fill heights depend on embedment material and compaction level; please refer
to Technical Note 2.02. Contact your local ADS representative or visit our website at www.ads-pipe.com for a
copy of the latest installation guidelines.
1
Where backfill is to 90% of a Standard Proctor Density (SPD). The backfill in the storm trenches at Lee Office
Building was '/4-0 crushed rock and was tested to a specification of 95% of Modified Proctor ASTM 1557. This
is a higher proctor value and should be more than adequate for the compaction.
Michael T. Baker
Senior Technician
GeoPacifi
Ingnecring.Inc.
14835 SW 72nd Avenue
Portland, Oregon 97224
503.598.8445 office
503.941.9281 fax
971.246.4080 mobile
www.geopacificeng.corn
2