| THIS DRAWING SHOWS ONE
VERSION OF THE ENVIROSAFE SEWER COVER, THE SURFACE DRAIN INSERT, INSTALLED IN A TYPICAL
SURFACE DRAIN CATCH BASIN. THE SURFACE DRAIN INSERT PROVIDES CONTINUOUS FLOW WHILE
MAINTAINING A WATER SEAL THAT PREVENTS HYDROCARBONS FROM ESCAPING TO THE ATMOSPHERE,
THEREBY COMPLYING WITH EPA QUALITY REGULATIONS RESTRICTING EMISSIONS OF VOC'S SUCH AS
BENZENE. THE SURFACE DRAIN INSERT ACTS AS A SEPARATOR AND COLLECTS 70% TO 80% OF ANY
SOLIDS THAT FLOW INTO THE SURFACE DRAIN. A MINIMUM WATER SEAL DEPTH OF 6" IS
RECOMMENDED TO PREVENT BACK PRESSURE FROM FORCING ANY HYDROCARBON VAPORS THROUGH THE WATER
SEAL ONCE THE SEWER SYSTEM HAS BEEN SEALED. THE SURFACE DRAIN INSERT CAN
PREVENT SEWER EXPLOSIONS BY ELIMINATING CONTACT OF SEWER GASES WITH AN IGNITION SOURCE.
|
| COVERED BY U.S. PATENT NO.'S 4,682,907; 4,776,722; 5,028,320; 5,062,735 |
