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1 � • Van Buskirk Park Golf Course TL No. A68101.02 March 10, 1995 Page 10 A-3 Sample Handling and Chain-of-Custody: Records will be developed for soil and groundwater samples including: sampling date, sample type, location, depth, job number, ' name of sampling personnel, and method of preservation. Each sample container will be labelled immediately following collection in the field. Chain-of-custody protocol, described in United States Environmental Protection Agency (U.S. EPA), 1986, Test Methods for Evaluatiniz Solid Waste, SW-846, 3rd edition, will be followed. Samples will be placed in an ice chest and maintained at approximately 4°C until they are delivered to the laboratory. The temperature within the ice chest will be monitored and recorded during the course of transport and delivery. Samples will be accompanied by proper chain-of-custody documentation. Upon arrival at the laboratory, the samples will be preserved for analysis in accordance with U.S. EPA and state of California requirements. Samples will be delivered to TwiningCalifornia. Analytical chemistry laboratory in Fresno, y methods with corresponding method detection limits and copies of the chain-of-custody records will be provided in the technical report. A-4 Laboratoa QualityAssurance/Quality Control A C :This section describes the laboratory QA/QC procedures which will be followed during the analyses of the soil and groundwater samples by Twining's analytical chemistry laboratory. The QA/QC procedures will be developed to minimize outside interferences during analyses for each sample. The laboratory manager will be in charge of creating and maintaining the program. In general, QA/QC proposed for this investigation are summarized as follows: W Analytical instruments are serviced on a regular basis to monitor accurate calibration; ' ■ Organic-free water will be monitored daily for quality; ■ Gas chromatographs will be calibrated daily; will be tested to check whether the glassware and reagents are free ■ Method blanks g g of interference from chemicals that would invalidate the analyses; and ■ Standards will be prepared using the applicable reference materials. ' A-5 Standard Operating Procedures for Using Photoionization Detector(PID) and/or Dra er® 1�be : The PID will be calibrated in accordance with the manufacture's recommendations prior to use in the field. Upon arrival at the project site, the PID will be used to monitor background concentrations of organic vapors in the atmosphere at the site. The background concentrations will be measured in a location upwind and removed as possible from sources of organic vapors on the site. When background concentrations of organic vapors register as "0.0" on the PID, subsequent readings of "0.0" registered from i 1 _ _J