The potential for contamination of groundwater samples by poly(vinyl chloride) (PVC) primer and adhesive was studied in both a laboratory simulation and actual groundwater samples. Tetrahydrofuran, methylethylketone, methylisobutylketone, and cyclohexanone were identified as the major constitutents of PVC primer and adhesive, and were found to be leached into the water surrounding bonded joints. The amount of organics released to the water declined with successive washes of water. The occurrence of such compounds can mask the presence of priority pollutants and create uncertainties in the determination of groundwater quality. Recommendations are given for the elimination or minimization of potential problems.