Near Surface Sample Collection

GRDC, Inc. is a leader in near surface geochemical analysis and interpretation with twenty years of experience in developing and applying low cost geochemical methods. These instructions are for those using indirect hydrocarbon methods for simple detection of potential microseepage anomalies.

This sampling procedure can be used for

• Eh, pH, and Conductivity
• Iodine
• Microbial

Sampling Instructions for Near Surface Soil Samples

• Locate your position on the map.
• Clear loose soil away from sample location.
• Using a simple garden trowel, dig down until soil is consolidated. Usually this is 2 to 6 inches.
• Acquire soil sample.
• Repeat two more times within a 6 foot area so that the sample is an aggregate of the sample location.
• You should have approximately half a ziploc sandwich bag of soil. Two to three cups of sample is adequate for analysis.