e9dd6711_Soil_sampling__RISK_CONTROL
[SPECIFIC JOB STEPS] Wash all equipment between sampling locations. Dry on clean paper towels. Earthmoving equipment only needs the loose dirt removing from it as smaller sampling holes are made in the exposed soil surface by the smaller stainless steel equipment. [RISK ASSESSMENT] Cross-contamination [RISK CONTROL] 
Wash equipment using three buckets. One with phosphate-free laboratory detergent, one with tap water and one with distilled water. Use plastic scrubbing brushes in the first two buckets. The brushes MUST STAY IN THEIR RESPECTIVE BUCKETS so as not to transfer contaminants.
Soil sampling
RISK CONTROL