be appreciated however that more than six or fewer than six door panels are possible while installed the door panels 100 rest in tracks 115 the tracks 115 permit the remediation technician to slide each of the door panels 100 horizontally and independently because the technician can independently slide each of the door panels 100 there are infinite degrees of freedom with respect to the horizontal positioning of the door panels relative to each other therefore the size of the opening in the hood through which the technician has access to the containment area is adjustable it will be further noted that more than one opening through the hood and other configurations for mounting and adjusting the position of the door panels are possible in accordance with the preferred embodiment the door panels 100 are also removable that is the technician can slide each of the door panels 100 horizontally until they are free of the tracks 115 and completely detached from the hood 15 the ability to remove and then stack the door panels 100 allows the hood 15 to be disassembled easily and quickly and this in turn further facilitates transportability still further in accordance with the preferred embodiment the hood 15 comprises a front panel 120 and side panels 125 and 130 in addition the side panels 125 and 130 are rotatably attached to the front panel 120 by hinged edge brackets 135 these hinged edge brackets permit the technician to fold the side panels 125 and 130 relative to the front panel 120 so that the hood is collapsible and essentially flat when disassembled even further facilitating transportability of the hood and the system as a whole alternatively the side panels 125 and 130 may be detachable from the.