At several aircraft hangars in a previous life because 409 used to contain testing requirement. It may still. We used a combination of weirs with automatic sluice gates and EPDM effluent ponds to satisfy that airfield, the local sewer authority and the EPA (state and fed). We did not do these on base but I have heard it, or a similar strategy, is employed in sensitive coastal areas.
Normal circumstances; pond sits open to the sky and storm drainage, hangar drains thru OWS to sanitary. Apron also drains to OWS IF they are fueling - designate an area or it gets absurd - otherwise it goes to storm. Event involving AFFF occurs; first weir shuts to OWS and opens to effluent pond, at the same time second weir shuts off pond from storm and contains all effluent in pond until local sewer authority is informed of coming discharge to sanitary. They may dictate rate of flow as it is likely to contain petroleum products or worse and AFFF depletes oxygen in streams as well as settling basins. Actuaries for an unnamed insurance company determined likelihood of two fires at same airfield in same containment period (assumed two days) to be ten to the negative 11th. Think flat slopes with no perched pipes - agitated AFFF foams up and becomes difficult to contain. Examples: Black oval @ 40°00'18.05" N 82°54'00.89" W.; black rectangle @ 39°06'34.24" N 84°24'58.03" W ROBERT HOLLAND Jr. AIA, CDT, LEED AP, PMP ARCHITECTS / ENGINEERS / INTERIOR DESIGNERS 7400 West Campus Rd. Suite 150 New Albany, OH 43054 www.shremshock.com t 614 545 4550 x 286 f 614 545 4555 [email protected] Please consider the environment before printing this e-mail. -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, March 11, 2015 1:29 PM To: [email protected] Subject: Foam system testing Has anyone had to test a foam sprinkler system where it was required to contain the discharge from the test and not let it flow into sewers or other site drainage systems? Basically it had to be contained and removed from the site? Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
