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GROUND ZERO ANALYSIS, INC. Quality Control/Quality Assurance Plan <br />7.0 FIELD EQUIPMENT CALIBRATION AND MAINTENANCE <br />The following measuring equipment may be used during the Remedial Investigation. Equipment is <br />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 />Water Level Measurements in Wells- <br />Steel surveyors tape. Calibration: manufacturer supplied temperature correction will <br />be applied as applicable for field conditions. Electrical well sounders. Calibration: <br />check against steel surveyor's tape. <br />Organic Vapors- <br />Photoionization detector. Calibration: Daily logged field calibration using a <br />isobutylene standard as per manufacturers instructions. <br />Groundwater pH Measurements- <br />Digital pH meter. Calibration: standard pH solutions of 4,7, and 10 will be utilized <br />for daily logged field calibration according to manufacturers instructions. <br />Electrical Conductivity- <br />Electrical conductivity meter. Calibration: factory-calibrated annually and <br />periodically calibrated against laboratory prepared standard calibration solution. <br />Water Temperature- <br />Mercury or digital thermometers. Calibration: one-time factory-calibrated. <br />Combustible Gas/Oxygen- <br />Combustible gas/oxygen meter calibration: Factory calibrated, field calibrated <br />monthly, zeroed daily according to manufacturers instructions. <br />Other Field Instrumentation or Equipment- <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 />8.0 LABORATORY QA/QC PLAN <br />Soil and groundwater samples will be submitted to a State Certified Hazardous Waste Laboratory <br />for chemical analysis of hazardous constituents. Established QA/QC procedures for analytical <br />operations will include sample custody procedures, standards of analytical accuracy, analysis of <br />matrix spikes and method data, and maintenance of control charts to monitor analytical <br />performance. These QA/QC procedures are outlined in the laboratory QA/QC Plan which is <br />available upon request. Organic chemical analyses will be performed in conformance with standard <br />procedures established by the United States Environmental Protection Agency (EPA) in <br />"Guidelines Establishing Test Procedures for the Analysis of Pollutants Under the Clean Water <br />Act" (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 <br />GAData\GROUNDZOGOEMAN ACAMPO\REPORTS \QAQC.doc <br />4