Basement water leak is resolved. I found the 3/4 inch water line had a pinhole leak as it came through the 8 inch basement concrete wall. The hole was 1 inch from the outside and 7 inches from the inside and the 90 degree fitting. The pipe through the wall from the fitting and out into the earth 3 feet was flexible copper that was installed in 1975. The picture shows a slight kink 2 inches from the leak. The leak was where you can see the slit on the left side of the picture.
Next is a closer shot of the leak. The leak was small but after I cleaned up the pipe for examination it looks like the leak would be quite a spray now.
You can see in the next picture the leak occurred quite a was from the slight kink. I checked on the internet and leaks in water pipes occur especially in homes built prior to 1970. The reason for the corrosion causing the leak is unknown. The failure occurred in the only chunk of flexible copper that I used in our water line. About 15 years ago I reconfigured the outside line and remember making a new gentle bend in the flexible pipe, but also remember the slight kink. I am not sure if that contributed to the failure. The bad area is repaired now with standard copper pipe.
The last picture above shows the leaking copper pipe removed.