HomeMy WebLinkAbout2013 Dec 23 - Memo from Infiltrators Systems Inc. r
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M E M O R A N D U M
DATE: DECEMBER 23, 2013
TO: LOCAL APPROVING AUTHORITIES (LAA) IN MASSACHUSETTS
FROM: DENNIS F. HALLAHAN, P.E., TECHNICAL DIRECTOR
RE: USE OF HD CHAMBERS IN 310 CMR 15.405 APPLICATIONS '
Infiltrator Systems Inc. (Infiltrator) manufactures lnfiltrator/Quick4�brand chambers and the
ARCT"'/BioDiffuserT"'chambers. Please note the following chamber structural loading
recommendations: '
Massachusetts DEP 310 CMR 15.405 Contents of Local Upgrade Approval states in parf:
"(1) In granting local upgrade approvals... ...where full compliance '
as defined in 310 CMR 15.404(1) is not feasible... ...the options set
forth below should be considered...
(b) ...an increase in the maximum allowable
depth of system components required by 310
CMR 15.221(7),from 36" to 72" below finish I
grade, provided that... ...H-20 loading is
provided for all system components...".
Infiltrator manufactures chambers for use in this application.These chambers are known as . ,
"Heavy Duty" models, and carry a "Heavy Duty" or"HD" label. When installed in accordance
with 15.404(1)(b) and the product installation instructions, these units can sustain an H-20 load. ,
MASS DEP has approved, and Infiltrator recommends,the use of these "Heavy Duty" model .
chamber products in deep burial applications which meet these specifications.
; "Heavy Duty" chamber products recommended for use in these applications are:
I Quick4 Standard HD Chamber
Quick4 High Capacity HD Chamber
Arc 36 HD Chamber
Arc 36 HC HD Chamber
"Heavy Duty" or"HD" chambers may be installed with up to a maximum of five-feet(5') of
cover in bed and eight-feet (8') of cover in trench installations respectively. These chambers
are not designed for use in commerciai traffic loading applications. If you or others have
questions or concerns about this policy, please contact the Infiltrator Systems Technical Services
Department, Inc.at 1-800-221-4436.
4 Business Park Road•P.O.Box 768•Old Saybrook,CT 06475•Phone 860.577.7000•Fax 860.577.7001•www.infiltratorsystems.com
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