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Appendix 8 - Standard Operating Procedures Page 2 of 2 Updated 08/1/2014 a ntea g ro u p Organic Vapor Procedures Soil samples are collected for analysis in the field for ionizable organic compounds using a photo-ionization detector (PID). The test procedure involves measuring approximately 30 grams from an undisturbed soil sample, placing this sub-sample j in a Zip-type bag or foil-wrapped jar. The container is warmed for approximately 20 minutes in the sun, then the head- space within the container is tested for total organic vapor measured in parts per million as benzene (ppm; volume/volume). The instrument is calibrated prior to drilling. The results of the field-testing are notedon the boring logs. PID readings are useful as a qualitative indication of relative levels of contamination, but cannot be used to quantify i petroleum hydrocarbon concentrations with the confidence of laboratory analyses. Equipment Decontamination Equipment that could potentially come in contact subsurface media and compromise the integrity of the samples is carefully decontaminated prior to drilling and sampling. Drilling auger and other large pieces of equipment are decontaminated using high pressure hot water spray. Soil and groundwater sampling apparatus, groundwater pumps, liners and other equipment are decontaminated in an Alconox scrub solution and double rinsed in clean tap water rinse followed. by a final distilled water rinse. The rinsate and other wastewater are contained in 55-gallon DOT-approved drums, labeled (to identify the contents, generation date and project) and stored on-site pending waste profiling and disposal. Waste Handling and Disposal (Soil Cuttings and Rinsate/Purge Water) Soil cuttings and rinsate/purge water generated during drilling and sampling are stored on-site in DOT-approved 55-gallon steel drums pending characterization. . A label is affixed to the drums indicating the contents of the drum, suspected contaminants, date of generation, and the boring number from which the waste is generated. The drums are removed from the site by a licensed waste disposal contractor to an appropriate facility for treatment/recycling.