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3.4 Seedbed Material Sampling The laboratory selected to analyze the samples should be contacted at least 15 days In advance of the sampling period to aid In croordinating sample analysis with the beginning of revegetation activities on site. All samples should be taken with either a the spade or soil auger. This equipment will be free of all foreign substances end rust. No galvanized tools will be used. Approximately 1 quart of material need be collected for each sample. All samples will be placed In clean polyethylene bags at the time of collection end securely sealed for delivery to the laboratory. All efforts will be made to deliver the samples to the laboratory as soon es possible. YVhen samples cannot be delivered within 24 hours of collection, samples will be alr~rled, Approximately 4t3 hours can be considered a sufficient time for air-dying. Samples should be dried In es , dust-free o} ah environment as is possible. Two composite samples will be collected representing the surface 0-8 and 624 Inch depths of seedbed material. Composite samples will be composed of 3 subsamples. For each sample set, the average slope and estimated percent coarse fragment content by volume need be noted. All sample site locations will be noted on a field map. (Additional composRe samples would be required for larger areas.) Each sample should be analyzed at a minimum for: • pH, • texture (field method), • percent organic matter, • NH4-N and N03-N (ppm), • phosphorus (ppm), • potassium (ppm), • electrical conductivity (mmhos/cm), • lime estimate, and • sodium adsorption ratio, if advisable. Accompanying each composte sample should be a brief discussion of the area from which the sample was collected. The discussion should include comments concerning: • plant species to be established, • type of seedbed preparation techniques to be employed, • type of mulching practices to be employed, M applicable, • approximate slope, • any special problems or conditions, and 6