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5 5.0 IDENTIFICATION AND SCREENING OF REMEDIAL TECHNOLOGIES The process of identifying and screening remedial technologies was performed in accordance with applicable Federal Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) guidelines and the California DSH Site Mitigation Decision Tree manual. The first step in this ' process was the identification of general response categories that address specific problems at the site. Technologies which correspond to each response category were then identified. The list of remedial technologies contained in the California DHS Site Mitigation Decision Tree Manual was used as the basis for identification of technologies potentially applicable to the former AFDC site. Those technologies were then screened to eliminate technologies considered: (1) too difficult to implement, (2) unproven, or (3) unable to achieve the remedial objectives within a reasonable time frame. Selection of the appropriate technologies was guided by the site conditions as well as the criteria discussed in Section 5.1 below. • 5.1 Screening Crittria and Methodology Five criteria were used to screen technologies. These criteria are: (1) effectiveness; (2) reliability; (3) availability; (4) timeliness of implementation; and (5) cost. Screening of remedial technologies also considers other information on environmental concerns, public health, and future liability, but these criteria are not used to screen technologies ' except where they impact on the five screening parameters. ' 5.1.1 Effectiveness Remedial technologies were evaluated on their ability to reduce the ' toxicity, volume, or mobility of the contaminants, and ability to reduce the risks posed by the contaminants. Best Demonstrated Available Technologies (BDAT) were the criteria for effectiveness. Specific waste characteristics that limit effectiveness of technology groups were identified. 5-1 GGA/0186b