Relaxation doesn’t come naturally to everyone, so when I grudgingly slipped into the steamy, mineral-rich water at Radium Hot Springs, I couldn’t help but think of that deadly day in 1967 when a semi truck hauling gasoline lost control on the steep mountain highway nearby and crashed, killing the driver and spilling more than 7,000 gallons of fuel into the creek that ran beside the hot pool and under the main stone building.