The invention involves a method of preparing an alkaline-earth metal oxide-containing polishing pad useful for polishing at least one of semiconductor, magnetic and optical substrates. An organic solvent forms a layer within a vessel and adding a pulp containing black liquor will establish three layers. The biosensor may be attached to the body through the use of a garment which may be fastened in multiple locations on the human body. An engaging device is mounted to the shoulder strap unit and is releasably engaged with the positioning device on the pouch, thereby releasably attach the shoulder strap unit to the pouch. These tools and methods allow a user to select and maintain different guidewire stiffness characteristics such that a single guidewire can address a range of access capabilities. The assembly also includes a parking meter having a front face that includes a coin slot a card slot and a control panel.