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- Field Blank: Prepared in the field using organic-free water. Field <br /> ' blanks accompany project site samples to the laboratory and are <br /> analyzed for specific chemical parameters unique to the project site <br /> ' where they were prepared. <br /> - Duplicates: Duplicated samples are collected "second samples" from a <br /> selected well and project site. They are collected as either split samples <br /> or second-run samples collected from the same well. <br /> - Equipment Blank: Periodic QC samples collected from field <br /> equipment rinseate to verify decontamination procedures. <br /> The number and types of QC samples are determined and analyzed on a project-specific <br /> basis. <br /> Shallow Groundwater Survey <br /> A shallow groundwater survey employs reconnaissance field sampling and chemical <br /> analysis for rapid plume mapping. A state-certified mobile laboratory may be used. <br /> The subcontractor would sample for analysis at locations marked by the RESNA field <br /> geologist. The thin-diameter probes from which groundwater is collected are advanced <br /> to the water bearing stratum and a groundwater sample is withdrawn to the surface, and <br /> analyzed immediately thereafter. Probe holes are backfilled with a grout slurry or as <br /> ! the local permitting agency requires. The contractor will report the details and results <br /> sampling, purging, and chemical analysis to RESNA. RESNA considers this type of <br /> shallow probe mapping (together with shallow groundwater sampling) to be a <br /> reconnaissance technique only. <br /> i <br /> !I • <br /> RESNA INDUSTRIES INC. <br /> Groundwater Sampling Protocol <br /> Latest Revision: September 18, 1992 <br />