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<br /> WASTE DISCHARGE REQUIREMENTS -2-
<br /> USC/A DIVISION OF HYDRITE CHEMICAL COMPANY
<br /> CLASS II SURFACE IMPOUNDMENT
<br /> SAN JOAQUIN COUNTY
<br /> accomplished by pumping wastewater from the bottom of the surface
<br /> impoundment through 12 spray nozzles.
<br /> 7. Raw materials used at the facility are divided into twelve chemical
<br /> groups: acids, bases, chlorinated compounds, defoamers, fabric whitening
<br /> agents, preservatives, anti-redeposition agents, surfactant anionics,
<br /> surfactant cationics, surfactant aphoterics, surfactant nonionics, and
<br /> solvents. Dyes and scents used in manufacturing at the plant are less
<br /> than 0.00129 percent and 0.50 percent, respectively, of total chemical
<br /> usage. No agricultural chemicals are manufactured at the facility.
<br /> 8. The existing waste management unit was sampled and the following were
<br /> detected:
<br /> A) August 1990- Wastewater flow to the surface impoundment- 1 .5 to 13
<br /> pH, 1 ,800 to 64,000 mg/l TDS, 500 to 2,400 mg/l sulfate, 290 to
<br /> 3,000 mg/l chloride;
<br /> B) August 1990- Surface impoundment wastewater- 62,000 to 64,000 mg/l
<br /> TDS, 16,000 to 17,000 mg/l sodium, 8,600 mg/l sodium, 0.1 mg/1
<br /> arsenic, less than 25 mg/l volatile organics;
<br /> C) August 1990- Surface impoundment sludge- 1 ,000 mg/kg 1 ,2
<br /> dichlorobenzene, 450 mg/kg naphthalene, 1 ,900 mg/kg 2-
<br /> methylnapthalene, 270 mg/kg phenanthrene, 210 mg/kg d-n-
<br /> butlyphthalate, 270 mg/kg fluoranthene, 380 mg/kg pyrene, 220 mg/kg
<br /> chrysene, 4.8 mg/kg arsenic, 41 mg/kg total chromium, 7.2 mg/kg
<br /> cobalt, 160 mg/kg copper, 31 mg/kg lead, 1. 1 mg/kg mercury, 22 mg/kg
<br /> nickel , 31 mg/kg vanadium, 100 mg/kg zinc; surface impoundment
<br /> sludge aquatic toxicity of LC50 of 625 mg/l and wastewater aquatic
<br /> toxicity of LC50 greater than 750 mg/l .
<br /> D) October 1991- Surface impoundment wastewater- Aquatic toxicity
<br /> testing resulted in an LC50 of greater than 500 mg/l for 4 samples,
<br /> 0.58-0.80 mg/l arsenic, 10.5-10.9 mg/l boron, 3.0-4.2 mg/l nickel ,
<br /> 23,300-23,800 mg/l sodium.
<br /> E) October 1991- Surface impoundment sludge- Aquatic toxicity testing
<br /> resulted in an LC50 of 653 mg/l for one vertical composite sample
<br /> adjacent to the discharge pipe and four sludge samples with LC50
<br /> values of less than 500 mg/l , ranging from 354-392 mg/1 .
<br /> 9. Facility plant managers have stated that the chemical processing schedule
<br /> changes hourly. The schedule is based on the quantity and type of a
<br /> customer' s order.
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