PARTON 31
and that is what they went through in drilling the well but below 150 feet the levels are within sampling error. In the discussion that followed, Bob answered several questions asked by Scott McMullen (Oracle resident) and responded to several comments made by Frank Pierson (Oracle resident). Frank stated that the migration of contaminants shown in the analyses of the core samples from the second well looked significant to him and he saw it as concrete evidence of migration. Bob emphasized that 50.0 ppb is an extremely low concentration in the soil but said more core samples down to about 170 feet would be taken to define the plume. Also, he further explained water migration as compared with gas diffusion.” (29) 
       While the 1984 monitoring well test results were troubling, what resulted from the findings was a second monitoring requirement which didn’t come to fruition until 1989. This was imposed by the Arizona Department of Environmental Quality (formerly known as the Arizona Department of Health Services). This second monitoring requirement resulted in a document entitled Subsurface Soil Investigation Report, Phase Two, Page-Trowbridge Ranch Landfill (36). It was dated March 22, 1989, and followed an earlier February, 1989, request from the University for a waiver of groundwater monitoring requirements. 

       This sampling event consisted of drilling 14 sampling locations and one background location. Ten of the bores were drilled to a depth of 15 feet, the 4 remaining were drilled to a depth of 35 feet. Sampling was taken at 15, 25, and 35 feet. Like the first findings, volatile organic compounds were again detected in the soil. The reporting document reads (36): 

“Six VOC’s were detected in the analysis of all soil samples collected at the site during the Phase Two investigation. The most common contamination point was C-1. At C-1, five VOC contaminants were found. They were: 1,1 Dichloroethene Carbon Tetrachloride