The invention relates to a process for the preparation of greaseproof packaging material with a kit number of greater than 21 by using hydroxypropylated high-amylose potato starch. The trailer when attached to the truck defines a gap between a forward most portion of the semi-trailer and rearward most portion of the operator cab. The second holding tool is configured for positioning the partially ground workpieces, and the second holding tool defines a plurality of second groove for containing the partially ground workpieces. In typical use, the inventive sensor probe is inserted into a flow cell through which the solution to be monitored flows. An illustrative waterway adapter may be constructed of a polymeric material.