Samples should be submitted with detailed identification on company letterhead or purchase order. When submitting samples, please identify your samples properly , along with the specific test to be performed and estimated expected levels. Perishable samples should be packed on dry ice and shipped in coolers. Coolers will be returned, if requested . Hazardous samples may be returned at our discretion. Samples will be retained for 30 days, unless otherwise instructed . Certain types of samples require extensive preparation for analysis and may entail a sample preparation charge. Please observe proper sampling techniques, as our analysis is representative only of the sample submitted. Download Sample Submission Form