This picture is a two dimensional view of tanks under a reinforced concrete slab like it is at Satish chopra's Shell statoin in Corona. A 2D test is not as accurate as a 3D test and is more prone to failure. However, as you see here, a 2D test can find items under the rebar. I am virtually certain Shell did a deceptive 2D test as a means to NOT find the buried sump and hydraulic lifts. Either they used a very poor 2D test equipment, the wrong antennae (here's what the right antennae would show) or the tester was not experienced enough to read past the concrete and rebar.
Shell, Governor Schwarzenegger and the Water Board all actively refused to tell me that Shell had done a failed GPR test when I was demanding one. Shell knew I could successfully do the test and did not want to tell me they did a failed one. So why would the Governor and the Water Board collude with Shell by aiding Shell in that effort to deceive me (Dr Phil says "lie by omission")?
I had to find out from the District Attorney Investigator that Shell did a failed GPR test. He has been the only "Player" that has been transparent in the pursuit of the truth. I have a geophysicist with lots of experience that can do a 3D test above the floor and find the equipment. It is not an "IQ test" for this "good ole country boy." Why is this an "IQ test" for Shell?