Part 13 (1/2)

”I don't know what the truth is. Maybe that will help tell us,” he said, staring at the water sample kit.

Dirk piloted the boat at top speed for over two hours until they reached the Hecate Strait. Tracking the navigation system, he cut the engine when they reached the GPS coordinates where the last water sample had been taken. Summer dropped a Niskin bottle over the side and scooped up a vial of seawater, then inserted a probe from the water a.n.a.lyzer.

”The pH reading is about 6.4. Not nearly the extreme we found two days ago, but still well below normal seawater levels.”

”Low enough to create havoc with the phytoplankton, which will ultimately sound a death knell up the food chain,” Dirk noted.

Summer gazed at the serene beauty of Gil Island and the surrounding pa.s.sage inlets, then shook her head. ”Hard to figure what could be causing the high acidity levels in such a pristine area,” she said.

”Maybe a pa.s.sing freighter with a leaky bilge or one that outright dumped some toxic waste,” Dirk posed.

Trevor shook his head. ”It's not very likely here. Commercial traffic generally runs on the other side of Gil Island. Typically, the only traffic through here is fis.h.i.+ng boats and ferryboats. And of course the occasional Alaskan cruise s.h.i.+p.”

”Then we've got to expand our sampling until we can pinpoint the source,” Summer said, labeling the specimen and preparing the Niskin bottle for another drop.

For the next several hours, Dirk steered the boat in ever-widening circles, while Summer and Trevor took dozens of water samples. To their chagrin, none of the samples approached the low pH levels reported by the Seattle lab. Letting the boat drift as they took a late-afternoon lunch, Dirk printed out a chart and showed it to the others.

”We've run a series of circles extending to an eight-mile radius from our initial sample. As it turns out, that was our peak reading. Everything south of there showed normal pH levels. But north of that point, it is a different story. We're picking up reduced pH levels in a rough cone shape.”

”Flowing with the prevailing currents,” Trevor noted. ”It might well have been a onetime spill of pollutants.”

”Perhaps it's a natural phenomenon,” Summer suggested. ”An underwater volcanic mineral that is creating a high acidity.”

”Now that we know where to look, we'll be able to find the answer,” Dirk said.

”I don't understand,” Trevor replied with a blank look.

”NUMA technology to the rescue,” Summer replied. ”We've got side-scan sonar and an ROV aboard. If there is something on the bottom, we'll be able to spot it one way or another.”

”But that will have to wait for another day,” Dirk said, noting the late hour. Restarting the motor, he nosed the research boat in the direction of Kitimat and accelerated to twenty-five knots. When they drew closer to Kitimat, Dirk let out a low whistle when he noticed an LNG tanker tucked under a covered dock off a small inlet.

”Can't believe they run one of those babies in and out of here,” he said.

”She must be offloading at Mitch.e.l.l Goyette's carbon sequestration facility,” Summer replied. As she and Trevor explained to Dirk the function of the facility, he eased off the throttle and turned toward the docked tanker.

”What are you doing?” Summer asked.

”Carbon sequestration. Carbon dioxide and acidity go together like peanut b.u.t.ter and jelly-you said so yourself,” he replied. ”Maybe there's a connection with the tanker.”

”The tanker is bringing in CO2 to offload at the facility. An inbound s.h.i.+p could have had an accidental leakage in the pa.s.sage,” Trevor said. ”Though that particular tanker must have come in last night or early this morning.”

”Trevor's right,” Summer added. ”The tanker wasn't there yesterday, and we didn't see it in the channel before that.” She studied the facility's pier, which stretched out into the channel, noticing that Goyette's luxury yacht and the other visiting boats had all disappeared.

”No harm in collecting a few samples to make sure they're honest,” Dirk countered.

Seconds later, a dark speedboat came roaring out of the covered dock and headed directly for the NUMA vessel. Dirk ignored the boat and held his course and speed.

”Somebody's awake,” he muttered. ”We're not even within a mile of the place. A tad touchy, aren't they?”