Our company took over the maintenance on a commercial property that has drip irrigation in the ornamental beds. It was installed in 1996 and everything did well for about 2 years. After 2 1/2 years the landscape started having problems. Seems as though material started dying. Looks as though it was the 'Skip' Laurels and Azaleas that did poorly. An occasional spruce here and there also died. Now I am to propose a rehab of the landscape but I'm concerned that the irrigation may not be working properly everywhere. First how do we find the lines? I don't want to chop them up and also, they may need location adjustments. I know that our irrigation dept. can run through the zones and determine if each one is working. Second, is there a commonsense way of determining if enough water is getting to the plantings? I'm just trying to gain some understanding of the issues before diving in. Remember, I landscape -- I don't install irrigation--but we have a department that does.