Performs laboratory tasks including but not limited to use of analytical balances, measuring volumes, proficient at dispensing volumes with devices such as syringe, pipet, or graduated cylinder, preparation of buffer solutions, use of pH meter, sample processing/ homogenization, microbial analysis, total organic carbon measurement, wet/dry determinations, sample combustions, use of liquid scintillation counters and assist with experimental setup such as preparation of traps for volatile components. Performs sample extraction and sample clean up techniques for water, soil, crop and animal tissues, including maceration, partitioning of sample extracts, extract cleanup by solid phase extraction (SPE), QuEChERS.