Perris Municipal Code Art. IV Traps for Sand, Grease and Oil

A restaurant or other establishment discharging greasy wastes which, under the conditions existing in sewers downstream therefrom, cause or threaten to cause stoppages or grease accumulations shall be required to install a grease trap and to maintain it so as to prevent excessive discharges of grease into the sewer.

(Code 1972, § 14.24.150; Ord. No. 352, § 405A, 1970)

(a) A vehicle service station or garage maintained for the servicing or repair of motor vehicles shall install and maintain a sand and grease interceptor. Waste waters from toilets shall not pass through this interceptor, but all waste waters arising from the servicing and repair of vehicles shall pass through it before discharge to a public sewer of the city.

(b) If the service station or garage does not include facilities for the washing of more than one vehicle at a time, the interceptor shall have an operation fluid capacity not less than nine cubic feet and an accessible effective water surface not less than five square feet. The term "accessible effective water surface," for the purposes of chapters 14.12 through 14.40, means a surface which is easily accessible for cleaning and which, at the same time, will retain oil floating on the surface of the water passing through the trap under conditions of use. If waste water enters the interceptor by way of a floor grate, the grate shall be over only one end, with the effluent pipe at the opposite end, and a partition between. If the waste water enters by way of a pipe terminating below the surface, the partition is not required. The interceptor shall be designed to retain any oil and grease which will float and any sand which will settle. It shall be watertight and structurally sound and durable. It shall be easily accessible for cleaning and for inspection.

(Code 1972, § 14.24.160; Ord. No. 352, § 405B, 1970)

A car wash establishment equipped to wash several autos at one time shall have a sand and grease interceptor with an operating fluid capacity not less than 100 cubic feet and a water surface not less than 30 square feet. The interceptor shall also be sufficiently large to permit a seven-day accumulation of sand and oil which will not, together, fill more than 25 percent of the fluid capacity.

(Code 1972, § 14.24.170; Ord. No. 352, § 405C, 1970)

An interceptor legally and properly installed at a vehicle service station or car wash establishment before December 30, 1970, shall be acceptable as an alternative to the interceptor specified in sections 14.24.160 and 14.24.170; provided such interceptor is effective in removing sand and oil and is so designed and installed that it can be inspected and properly maintained. If the city manager finds that an interceptor is incapable of retaining adequately the sand and oil in the waste water flow from a service station or car wash establishment, he shall give the proprietor a written notice requiring that an adequate interceptor be installed within 60 days. If an adequate interceptor is not installed within 60 days, the city manager may disconnect the property from the sewer.

(Code 1972, § 14.24.180; Ord. No. 352, § 405D, 1970)

The city manager may maintain an information file, available for public use, of acceptable designs of sand and grease interceptors. Installation of an interceptor of a design shown in this file, or of any design meeting the size requirements set forth in chapters 14.12 through 14.40, shall not impute any liability to the city for the adequacy of the interceptor under actual conditions of use. It shall not relieve the owner or proprietor of responsibility for keeping sand and oil out of the sewer. If his interceptor is not adequate under the conditions of use, he shall construct one which is effective in accomplishing the intended purpose.

(Code 1972, § 14.24.190; Ord. No. 352, § 405E, 1970)

A sand and oil interceptor required by chapters 14.12 through 14.40 shall be properly cleaned and maintained to ensure that the accumulations of sand and oil do not impair the efficiency of the interceptor, or pass out with the effluent. An interceptor will not be considered properly maintained if sand and oil accumulations total more than 25 percent of the operating fluid capacity.

(Code 1972, § 14.24.200; Ord. No. 352, § 405F, 1970)