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EWWONMEIVTAL TECHIVOLOCIES Task IV: Implementation of Attenuation and Leaching Studies Deliverable: Experimental studies and chemical results of leaching and attenuation studies Following discussions with regulatory agencies, the experiments designed in Task H will be revised as necessary and implemented. Moju E.T. will retain Clayton Environmental Laboratories as subcontractors to conduct the site-specific leaching studies for CAM metals, solvent organics, PNAs, phenols,petroleum hydrocarbons, and any chemical constituent selected in Task Il, as well as the measurement of critical parameters such as organic matter, clay content, grain-size distribution and oxide composition of site soil, and permeability of waste. Moju E.T. will design and set up necessary experiments studies in Clayton's laboratory. Chemical analysis of effluents will also be conducted by the subcontrator laboratory. Task V: Preparation of Designated Levels Report Deliverable: Site-specific designated levels report and regulatory approval of report. Moju E.T. will prepare a report summarizing all the designated levels for each chemical identified in Tasks I through IV. The report will contain the designated levels for chemicals estimated using: 1) the generic values of attenuation and leachability factors; 2) the critical parameters used to determine site-specific attenuation and leachability factors; 3) the empirical models for predicting site-specific attenuation or leachability factors; and 4) experimental verification of the factors for those chemicals with site-specific designated levels. Tables summarizing designated levels for the landfill will be included in the report. SCHEDULE The overall duration of the Tasks I through V is projected at 12 to 16 weeks. Task I will commence within a week following Forward's approval of this Work Plan and will be conducted over a period of two weeks. Task II will be conducted following the completion of Task I, over a period of three to four weeks. Task III should occur during the sixth or seventh week of the project. Two to four weeks will be used to set up attenuation and leaching studies and another three to four weeks will be required to obtain the analytical results described in Task IV. Task V will commence concurrently with Task IV and be completed about two weeks following the completion of Task IV. August 15, 1990 5 Revision 2.0 7255 Saroni Drive-Oakland,California,USA 94611 TEL(415)339-1543-FAX(415)339-6775