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In October 1978, Cal Cedar applied for a wastewater discharge permit from the MUD. The permit was issued on November 28, 1978. Wastewater is generated from the operation of the steam condenser at the kilns and railcar heating system. Small amounts of stain wash into the drain during cleanup operations. The stain contains 98.35 percent water, 1.5 percent wax, 0.12 percent color, and 0.03 percent emulsifying agent. (23) In 1977, grease traps were installed for all wastewater that enters the city sanitary sewer line (23, 24). There was no sampling information prior to the permit being issued (25). Permits have been issued for wastewater discharge for Cal Cedar from 1978 to present. On April 27, 1992 and May 14, 1992, Cal Cedar was found to have discharged wastewater containing oil and grease at concentrations of 662 milligrams per liter (mg/I) and 933 mg/1, respectively. The pretreatment standards for oil and grease were set at a maximum concentration of 100 mg/1. Cal Cedar was fined for its violation and was ordered to submit a compliance schedule. The compliance schedule was to include a detailed engineering plan, signed by a California registered engineer, for installing pretreatment equipment to achieve consistent compliance with effluent standards. (26) In January 1989, the MUD found damage to a city storm sewer line on Cal Cedar's property. A sample collected from this storm sump had a pH of 12.2. (2, 3) 2.4.6 City of Stockton Fire Department (SFD), Hazardous Material Division. The SFD has been actively involved at the site since 1979, when Cal Cedar applied for, and was granted, a flammable liquid permit. In 1986, a hazardous material permit was granted to Cal Cedar. There have been no violations with regard to these permits, and no chemical fires have been recorded. In 1989, one hydroxide spill into the city's storm drain was recorded. The District Attorney's office handled the incident and Cal Cedar corrected the violation. In April 1989, an inspection conducted by the SFD at Cal Cedar noted 34 violations (27,28). The SFD conducts detailed inspections of the site annually. (29) 2.4.7 San Joaquin Valley Unified Air Pollution Control District (APCD). The APCD has been involved with the site since 1974 (9). Inspections of the site are conducted quarterly (5). There have been numerous notices of violations and notices of compliance for the site (9). Cal Cedar has corrected conditions leading to violations. (30) The boiler on site was permitted and began production sometime in the early 1970s (Permit N150-8-0). The boiler has not been in production for more than 10 days since 1991 (8). Wood chips with wax and oil were used as fuel for the boiler (30). A notice of violation for visible emissions exceeding 40 percent opacity was recorded in 1991 by the APCD (9). Cal Cedar monitors its emissions and submits an annual report to the APCD (8). 3.0 HAZARD RANKING SYSTEM FACTORS 3.1 Sources of Contamination Sources of contamination are approximately 37 drums of hazardous wastes observed during the site visit. Twenty-eight drums were stored in the two containment pallets and nine drums were located at collection points throughout the site. (5) Totals from an annual U.S. EPA 1991 Hazardous Waste Report were divided by the quarter to establish maximum quantity on site at any given time. Therefore, a conservative estimate of 3,310 gallons of ha7ardous waste may be on site at any given time. (11) PA Califomia Cedar Products-W (F) • 5/93 7 Printed on 50% recycled paper. qie