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Site Description3.0 SITE DESCRTPTION AND OPERATIONAL HISTORY

The Site description and a brief summary of Site operations related to the Order requirernents areprovided in this section. The information provided in this section is based on the best availableevidence.3.1 Site DescriptionPrior to Disney's acquisition of the property in the late 1930's, the only known use of theproperty was as a polo ground. Disney has utilized the Site since 1938 primarily for producinganimated and live-action motion pictures and original television product for network andsyndication markets. Site operations have included office buildings, sound stages and openareas/sets for filming. Other Site-related support activities have included painting, non-production black and white film processing, lithographic printing, clay modeling, former andcurrent vehicle fueling stations, and a former vehicle maintenance area (Kennedy/JenksConsultants, 1992). The majority of the original building stmctures have been retained at theSite, however, construction of office and production buildings has continued to the present date.The current Site layout is provided in Figure 2. Historical Site layouts are also shown on thehistorical Site investigation figures provided in Appendix B-3.2 Site ChronologyA brief chronology of key Site activities focused on operations relevant to the Order is providedbelow:

Date OperationSept 1938 Property purchased/construction begins. Disney obtained riglrts

from the LADWP to use underlying groundwater for aircooling/heating purposes as long as water was returned to thegroundwater basin and no chernicals were added to the water.

Nov 1938 East and West Wells installed - supplied water for once-throughair conditioning system (Section 3.3.2).1939 to 1960 Extracted groundwater from well water cooling systern discharged

to settling basins between Riverside Drive and the Los AngelesRiver per agreement with LADWP.1959/1960 Improvanents to Alameda Street storm drain.

1960 to 1992 Stormwater Diversion Sump operation (Section 3.3.2.2).1961 Stipulated judgment on water use - affrrmed Disney's right to use

groundwater as long aS use was not consumptive and was used in

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I'RS Site Description1960 to 1982

1982 to 1993

JantoFeb 1989Jan 1993

Feb 26,1993

199319961993 to present

the "same manner" and for the "same purpose" as it had since1939.Extracted groundwater discharged to City of Burbank catch basinon Buena Vista Street and then to the Los Angeles fuver, upstreamfrom a rubber dam (owned and operated by the City of LosAngeles) that diverted the water into the Headworks SpreadingGrounds.Extracted groundwater discharged to City of Burbank catch basinon Buena Vista Street and then to the lns Angeles River (use ofrubber dam was discontinued by the City of Los Angeles).North Well installed.NPDES permit iszued for well water cooling systan waterdischarge.Groundwater extraction for well water cooling systan ceased andnew cooling tower starts operation.Keystone/Parkside storm drain connection.Second cooling tower installed.Current cooling system uses City of Burbank-supplied water;blowdown discharged to sanitary sewer.

3.3 Site Operations Relevant to the Assessment Required by the OrderThe following Site operations were identified as being relevant to the LARWQCB requirernentsunder the Order and/or the subsequent technical discussions:. Groundwater extraction and discharge as part of the former well water cooling systern

operations;o Sanitary sewer effluent discharge as part of the current cooling system operations;o Stormwater run-offcontainment as part of the former stormwater diversion sump;o Potassium dichromate storage and use during film processing operations in formerBuilding 15;and. Other Site operations where the RWQCB has asked whether metals or metal-containingcompounds may have been previously used or stored, such as the Paint and Sign Shop,Central Plant sumps and clarifiers, the Former Barrel Storage Area, and the former wasteoil tanks near the former Garage Area.

The following sections summarize the operations that occurred in each of these areas.