GSA Federal Acquisition Service
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Wildland Fire & Equipment
Fire & Chemical Analysis

Look here for chemical testing & analysis services, and geotechnical and thermal/fire testing & analysis.
Source
Description
MAS Multiple Award Schedule - Available offerings include commercial goods and services organized by 12 Large Categories, corresponding Subcategories, and SINs.
66 SCIENTIFIC EQUIPMENT AND SERVICES - Test and Measurement Equipment, Unmanned Scientific Vehicles; Laboratory Instruments, Furnishings and LIMS; Geophysical and Environmental Analysis Equipment; and Mechanical, Chemical, Electrical, and Geophysical Testing Services