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N001 *MOP 7.0 FIELD EQUIPMENT CALIBRATION AND MAINTENANCE The following measuring equipment may be used during the Remedial Investigation. Equipment is grouped by field activity. Calibration procedures and frequency are listed for each piece. • oil Borings and Well Dimensions- SteeI and coated cloth tape. Calibration: none. • Water Level Measurements in Wells- Steel surveyors tape. Calibration: manufacturer supplied temperature correction will be applied as applicable for field conditions. Electrical well sounders. Calibration: check against steel surveyor's tape. • Organic Vapors- Photoionization detector. Calibration: Daily logged field calibration using a isobutylene standard as per manufacturers instructions. • Groundwater pH Measurements- Digital pH meter. Calibration: standard pH solutions of 4,7, and 10 will be utilized for daily logged field calibration according to manufacturers instructions. • Electrical Conductivity- Electrical conductivity meter. Calibration: factory-calibrated annually and periodically calibrated against laboratory prepared standard calibration solution. • Water Temperature- Mercury or digital thermometers. Calibration: one-time factory-calibrated. • Combustible Gas/Oxvaen- Combustible gas/oxygen meter calibration: Factory calibrated, field calibrated monthly, zeroed daily according to manufacturers instructions. • Other Field Instumentation or Equipment- Calibration procedures for any other instumentation or equipment used will be documented at the request of the client or regulatory authority. All equipment will be checked daily and replaced as necessary. Instrument manuals and an instrument log book will accompany equipment into the field. Any calibration, repairs or related information will be recorded in the log book. 8.0 LABORATORY QA/QC PLAN Soil and groundwater samples will be submitted to a State Certified Hazardous Waste Laboratory for chemical analysis of hazardous constituents. Established QA/QC procedures for analytical operations will include sample custody procedures, standards of analytical accuracy, analysis of matriz spikes and method data, and maintenance of control charts to monitor analytical performance. These QA/QC procedures are outlined in the laboratory QA/QC Plan which is available upon request. Organic chemical analyses will be performed in conformance with standard procedures established by the United States Environmental Protection Agency (EPA) in "Guidelines Establishing Test Procedures for the Analysis of Pollutants Under the Clean Water Act" (40 CFR Part 136, October 1984). The laboratory is periodically evaluated through 4