Response procedures to any discharge or abnormal loss
of material from an underground storage system shall follow the requirements
of 527 CMR 9.20 or 310 CMR 30.697, whichever is applicable. In the
case of any hazardous material for which response procedures are not
specified under state law, response procedures shall be those required
for hazardous wastes under 310 CMR 30.697, unless otherwise specified
by the Board of Health.