Laserfiche WebLink
Geosynteco <br /> consultants <br /> SUGGESTED OPERATING PROCEDURE <br /> SOIL GAS PROBE INSTALLATION <br /> Geosyntec Consultants,Inc. <br /> Last revision: December 2009 <br /> 1 INTRODUCTION <br /> This suggested operating procedure(SOP) describes the design and methods for the installation <br /> of soil gas probes of sufficient quality to assess potential human health risks due to subsurface <br /> vapor intrusion to indoor air and subsequent inhalation exposures. <br /> 2 SOIL GAS PROBE DESIGN AND INSTALLATION <br /> 2.1 Compliance with Site Dig Permits and.Utility Clearances <br /> Site specific permits may be required prior to subsurface activities. All necessary permits will be <br /> secured in advance of any drilling activities. Underground utilities(water, sewer, electricity, gas, <br /> cable,telephone, etc.)will be reviewed prior to any,drilling. <br /> 2.2 Soil Coring via GeoProbe® <br /> Soil core will be collected with a GeoProbe® direct push system (or equivalent). This method <br /> minimizes the disturbance to the geologic materials surrounding a soil gas probe subsequently <br /> installed in the core-hole. A 2-inch diameter core barrel will be used, since this provides <br /> sufficient core volume for field screening, geologic logging, and selected laboratory analyses (if <br /> required). <br /> 2.3 Geologic Logging <br /> Soil cores will be visually inspected to record details of.the color, texture, moisture, density, <br /> cohesion,plasticity, staining, and odor.Digital photographs will be taken of each soil core. <br /> 2.4 Soil Samples for Analysis of Physical.Properties(if required) <br /> After geologic logging of the soil core soil samples will be collected for laboratory analysis of <br /> g g gg� g P rY Y � <br /> moisture content, grain-size distribution; porosity and bulk density. The analysis will be <br /> completed by a laboratory according to the following methods: <br /> Soil Moisture Content: ASTM D2216 <br /> Grain Size: ASTM D422 <br /> Porosity: API RP40 j <br /> Bulk density: API RP40 <br /> i 2009.12.03 <br />