In some cases, specific information regarding the historical use of land or property may not be available. PAL has the capability to perform multi-residue pesticide screenings in soil and solid matrices. This multi-residue technique can screen for over 230 compounds with a single extraction and a combination of modified EPA 8000 series methods. When there is limited information about a specific site, or land is transitioning from one use to another, a broad-spectrum residue screen can provide a valuable snapshot of residues that may be present. Examples may include development of former agricultural lands to commercial/residential uses, crop rotations, converting land from conventional to organic farming practices and environmental assessment for phase one cleanup projects. For land transitioning to hemp production, soil and water can be screened for residual pesticides to identify potential problems prior to planting.
Pesticide contamination of both surface and groundwater can come from several sources. In addition to testing for specific residues, PAL offers the multi-residue screening in aqueous matrices. This multi-residue technique provides a comprehensive screen using recognized combinations of modified EPA 8000 series methods. Broad spectrum residue screening can provide valuable information if the specific chemicals are not known. Examples may include stormwater runoff, environmental assessment for phase one cleanup projects and testing of irrigation wells for contaminants.