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0 • J. H. KLEINFELDER & ASSOCIATES File No. 5-2737-1 May 7, 1985 Page Two Phase 1 At this time, we propose to further evaluate the sludge and liquid con- tained in the pond by obtaining and testing two sludge samples from near the inlet, one liquid sample, if available, and two soil samples from inside the pond and adjacent to the inlet area. The sludge and liquid samples will be collected in glass jars, labeled and sealed, and delivered to Canonie Engineers of Stockton for laboratory testing. The soil samples will be obtained using J. H. Kleinfelder h Associates hand sampling equipment. Relatively undisturbed samples will be obtained by driving a 2-inch inside diameter sampler lined with brass tubing into the soils to a depth of approximately 1 foot below the sludge layer. The brass tubes will be removed, sealed, and cooled until delivery to the laboratory for testing. At this time, we anticipate that chemical analysis will consist of EPA test methods 601 and 602, with primary concern for methylene chloride and toluene. Cc Phase 2 At this time, it is our recommendation to abandon the existing pond and utilize an alternative method of waste disposal. This decision is based on the costs which would be incurred to meet all Chapter 15 requirements for wastewater disposal ponds. The results of the chemical analyses will be used to define existing conditions presented by the current disposal method, determine how the sludge and wastewater in the pond can be disposed of, and if any additional evaluation such as groundwater monitoring wells, soil borings, etc., will be required. If the test results are negative or below the State's levels of concern, we propose to evaluate the feasibility of discing the existing sludge material into H & M Trucking's adjacent field. The pond could then be backfilled to the level of the surrounding property. An alternative method for future waste disposal would then be evaluated such as a septic tank/leach field system or spray irrigation and land farming system. The detailed evaluation and recommendations will be submitted as the report of waste discharge requested by the Central Valley Regional Water Quality Control Board. r If test results indicate possible sludge contamination, an additional plan of study will be prepared in concert with the C.V.R.W.Q.C.B. Again, if this option is required a more detailed outline will be presented in the plan of study prepared after chemical analyses are completed.