All was going well down in Sunnyvale, albeit a little slow. A number of factors were slowing us down. We had to increase our target depth beyond 20 feet to intercept and collect groundwater samples from about 28 to 32 feet. We were hand augering the first 5 feet to clear utilities. We encountered a layer of gravel that collapsed into the hole each time we tripped out. Gravel can also have a camming affect on the rods and core barrel that can make it hard to pull them out of the the hole.
Our client called late in the afternoon and to let us know that they were also buying an adjoining parking lot that reportedly had a gas station. I quickly checked Sanborn Maps and found no gas station, but I did find that the lot had a truck repair facility in the 1940s and a print shop in the 1950s. Bad enough. We now needed to investigate soil and groundwater quality on this lot. The downside is we couldn't start for another two days. The one-call utility notification requires 48 hours before you can start drilling. This gives all the underground utilities time to mark the locations of their buried utilities. Hitting underground utilities can ruin your day and maybe get someone injured or killed.
I got the wheels in motion. I called the one-call underground notification system. I called the drilling company and fortunately they had Friday open, the soonest we could start after the 48 hour waiting period. I called our field geologist to mark out the new locations in white marking paint and to have her prepare for Friday. I love it when a plan falls apart and then comes back together nicely in a new form.