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Smith Environmental Technologies Corporation <br />Quality Assivancc/Quality Control Plan <br />Revised February 1995 <br />All equipment will be checked daily and replaced as necessary. Instrument manuals and an instrument <br />log book will accompany equipment into the field. Any calibration, repairs or related information will <br />be recorded in the log book- <br />8.0 <br />ook <br />8.0 LABORATORY QA/QC PLAN <br />Soil and groundwater samples will be submitted to a State Certified Hazardous Waste Laboratory for <br />chemical analysis of hazardous constituents. Established QA/QC procedures for analytical operations <br />will include sample custody procedures, standards of analytical accuracy, analysis of matrix spikes and <br />method blanks, data reduction, verification of raw analytical data, and maintenance of control charts to <br />monitor analytical performance. These QA/QC procedures are outlined in the laboratory QA/QC Plan <br />which is available upon request. Organic chemical analyses will be performed in conformance with <br />standard procedures established by the United States Environmental Protection Agency (EPA) in <br />"Guidelines F_.Whhshing Test Procedures for the Ana sis of Pollutants Under the Clean Water Act" <br />(40 CFR, Part 136, October 1984). The laboratory is periodically evaluated through external <br />performance audits conducted by EPA and DHS using QC labs. The specific analytical methods to be <br />utilized for purgeable and semivolatile hydrocarbons analyses are shown on Table 2. <br />Provided the database is of sufficient size, statistical techniques may be employed for data validation - <br />9.0 GROUNDWATER MONITORING PROTOCOL <br />Monitoring of depth to water and free product thickness within wells at the site will be conducted using <br />an Interface Probe or Conductivity Meter. For consistency, all measurements will be taken from the <br />north side of the wellhead at the survey mark. To assess potential infiltration of fine-grained sediments, <br />total well depth will also be sounded. <br />m:� ..�shells\QAQC-95. WP5 <br />SMTH <br />