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4 a r 9 0 <br />GROUND ZERO ANALYSIS, INC. <br />0 <br />Quality Control/Quality Assurance Plan <br />The following measuring equipment may be used during the Remedial Investigation. Equipment <br />is grouped by field activity. Calibration procedures and frequency are listed for each piece. <br />• Soil Borings and Well Dimensions - <br />Steel and coated cloth tape. Calibration: none. <br />• Organic Vapors- <br />Photoionization detector. Calibration: Daily logged field calibration using a <br />isobutylene standard as per manufacturers instructions. <br />• Other Field Instrumentation or Eq <br />Calibration procedures for any other instrumentation or equipment used will be <br />documented at the request of the client or regulatory authority. <br />All equipment will be checked daily and replaced as necessary. Instrument manuals and an <br />instrument log book will accompany equipment into the field. Any calibration, repairs or related <br />information will be recorded in the log' book. <br />Soil and groundwater samples will be submitted to a State Certified Laboratory for chemical <br />analysis of selected constituents. Established QA/QC procedures for analytical operations will <br />include sample custody procedures, standards of analytical accuracy, analysis of matrix spikes <br />and method data, and maintenance of control charts to monitor analytical performance. These <br />QA/QC procedures are outlined in the laboratory QA/QC Plan which is available upon request. <br />Organic chemical analyses will be performed in conformance with standard procedures <br />established by the United States Environmental Protection Agency (EPA) in "Guidelines <br />Establishing Test Procedures for the Analysis of Pollutants Under the Clean Water Act" (40 CFR <br />Part 136, October 1984). The laboratory is periodically evaluated through external performance <br />audits conducted by EPA and DHS using QC labs. The specific analytical methods to be utilized <br />for purgeable and semivolatile hydrocarbons analyses are shown on Table 2. <br />A proposal will be submitted to the lead Regulatory Authority with proposed boring/sampling <br />locations. The exact location and number of borings at each site will be determined in the field <br />by the Project Geologist/Engineer. <br />Prior to arriving at the sample site, the drill rig/rods will be steam cleaned and all sample <br />equipment will be cleaned. Cleaning will be conducted on-site on all sampling equipment <br />between each sample interval. <br />G:\GROUNDZE\LIONUDAKIS\WorkPlan\QAQC.doc <br />4 <br />