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AUG 18 '89 12:12 EIO NATI(�L CORP. <br /> (C) 1989 BIO NATIONAL CORPORATION <br /> The following outline its a logical, step-by-step aroach to completion of site <br /> assessment and the planned treatment program. <br /> I. AUGUST 17, 1989 BIO NATION'ALIDAMES & MOORE WORK PLAN TO FOLLOW <br /> FOR INSTALLATION OF ADDITIONAL. MONIT6RING WELLS TO DETERMINE <br /> THICKNESS, EXTENT AND MOVEMENT OF GROLTNI)WATER CONTAMINATION. <br /> a. Soil sampling at five foot int.ervals�dtring well boring, verifying <br /> outer limit of roil and groundwater contamination. <br /> b. Establish groundwater level and gradient. <br /> C. Baildown tests to determine thickness of floating product. <br /> d. Aquifer pumping and slug tests are to determine aquifer parameters <br /> 2. THE WORK PLANE INCLUDES VERX)FICATION BORING TO DETERMINE EXTENT <br /> OF CHLORINATED lIY1DROCARBON SOIL CONAMINATION. IF NECESSARY, <br /> ESTABLISH SEPARATE MITIGATION METHODOLWIES FOR CHLORINATED AND <br /> PETROLEUM HYDROCARBON SOIL CONTAMINATT�NS. - -- <br /> a. Five spot or other suitable pattern soil dborings, Sampled at five foot <br /> intervals, made in the vicinity of the solvent tank site to verify <br /> areal extent of chlorinated hydrocarbon soil (;ontamina.tion reported <br /> in both the original tank extraction and Bio NationaljDacnes & Moore <br /> site investigations. <br /> b, If solvent tank site chlorinated hydrucarbon contamination is limited, <br /> the proposed treatment methodology should reduce the chlorinated <br /> material to below action level. <br /> C. DUr-ing review meetings with RWQCB and San Joaquin County, <br /> determine level of contamination to be 'no action", and concentrate <br /> on worst case contamination. <br /> i <br /> E <br /> 2 HOLT806 j <br /> I <br />