While manually drawn or “dipped” samples are commonly taken at the bulk tank, silo or hauler tank, these are always grab samples and thus not truly representative of the overall components of the raw milk which can impact payment. Because the sample is so limited, it may inaccurately convey the relative quality, SCC counts or presence of any contaminating elements in the actual tank or silo. The potential for introducing outside contaminants while the individual is performing manual dipping is always a risk.