8.5.5 Matrix and Parameter Issues

8.5.5.1 Laboratory experience

Based on the survey results, most laboratories’ ISM experience has been with metals projects. Explosives and SVOC projects are next in frequency. PCBs and TPHs make up the third tier. A few laboratories have ISM experience with VOC and dioxins, and fewer still with perchlorate and cyanide. Parameter-specific certification of the ISM laboratory processes is generally not available due to a lack of reference methods. Section 6 provides specific guidance about appropriate laboratory processes for the various parameter groups. Some laboratories have experience with a wider range of contaminants, including metals, pesticides, dioxins, PCBs, SVOCs, VOCs, and petroleum, so it is important to ask laboratories how much experience they have for contaminant analytes required by the DQOs.