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s <br /> Mill <br /> c-a <br /> Laboratory and field handling procedures of samples are monitored by including QC <br /> r samples for analysis with every submitted sample lot from a project site. QC samples <br /> may include any combination of th-, following: <br /> • Trip Blanks: Used for purgeable organic compounds only; QC <br /> samples are collected in 40 milliliter (ml) sample vials filled in the <br /> analytical laboratory with organic-free water. Trip blanks are sent to <br /> the project site, and travel with project site samples. Trip blanks are <br /> not opened, and are returned from a project site with the project site <br /> sampies for analysis. <br /> • Field Blank: Prepared in the field using orgamic-free water. These <br /> QC samples accompany project site samples to the laboratory and are <br /> analyzed for specific chemical p..irameters 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. Occasionally, a state-certified laboratory <br /> subcontractor may be used. The subcontractor would sample for analysis at locations <br /> marked by the RESNA field geologist. The thin-diameter probes from which <br /> groundwater is collected are advanced to the water bearing stratum, sample is <br /> withdrawn to the surface, and analyzed immediately thereafter. Probe holes are <br /> backfilled with a grout slurry or as the local permitting agency requires. The shallow <br /> survey contractor will supply sampling, purging, and field chemical analysis to RESNA <br /> in their report. RES)NA considers this type of shallow probe mapping (together with <br /> shallow groundwater sampling)to be a reconnaissance technique only. <br /> RESNA INDUSTRIES, INC. <br /> Groundwater Sampling Protocol <br /> • Latest Revision: October 23, 1991 <br />