14.60.5125 Limited discharge limitations and monitoring requirements

14.60.5125 Limited discharge limitations and monitoring requirements.

Constituents	Maximum Limits
Flow per day	5,000 gallons
BTEX (benzene, toluene, ethylbenzene, xylene)	2 mg/L
TPH gas and diesel (Total petroleum hydrocarbons)	15 mg/L
pH	5.0 – 11.0
Lead	1.5 mg/L
Zinc	1.5 mg/L
LEL (lower explosive level)	10%
Closed cup flashpoint*	>140/F
Settleable solids	7 ml/L

*Test method specified in 40 CFR 261.21

Parameters	Frequency	Sample Type/Method
Flow	Daily	Metered or as measured on Baker Tank
BTEX	Every 3 months	Grab/EPA Method 602
TPH	Every 3 months	Grab
pH	Every 3 months	Grab
Lead	Every 3 months	Grab
Zinc	Every 3 months	Grab
LEL	Daily	Meter
Closed cup flashpoint	Every 3 months	Grab
Settleable solids	Prior to each discharge	Grab/Imhoff Cone

1. There shall be no pronounced odor of solvent or gasoline.

2. There shall be no pronounced oil sheen or unusual color.

3. There shall be no pronounced hydrogen sulfide (rotten egg) odor.

D. Sampling Site. All samples shall be taken at the effluent of the treatment system before the wastewater enters the city sewer collection system.

E. Reporting Requirements. All monitoring reports shall be submitted to the city of Lynnwood at least 48 hours prior to discharge. The report shall include volumes of discharge as well as the analytical results.

If any discharge limits or operating procedures are exceeded, the city pretreatment coordinator shall be notified immediately. The recovery system shall cease discharging if the BTEX concentration, TPH concentration, LEL of 10 percent or the closed cup flashpoint of less than 140/F is exceeded.

A drawing showing the dewatering site, holding tank and discharge location shall be submitted prior to discharge.

At all times the contaminated water shall be prevented from entering any natural waters or drain system. (Ord. 3220 § 2, 2016)