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Samples of the groundwater will be collected using a Teflon or disposable bailer which has been washed <br /> in a solution of Alconox or non-phosphate TSP followed by several rinses with potable water. The <br /> groundwater samples collected from the well will be decanted into two appropriately prepared 40-m1 organic <br /> analysis (VOA) bottles and two 1-L amber bottles. The sample containers will be labeled with the site <br /> location, well I.D. number, date, time, and initials of the person collecting the samples. Care will be taken <br /> when transferring the water from the bailer to the VOA bottles to avoid turbulence and the containers will <br /> be filled above the top of the opening to form a positive meniscus. No headspace will be present in the <br /> sample container once it is sealed. The samples will then be placed in an ice chest with the completed <br /> chain-of-custody form and maintained at 4°C until delivered to a State of California-certified analytical <br /> laboratory (Chromalab, San Ramon) for chemical analyses. The groundwater samples will be analyzed for <br /> TPH-G (EPA method 5030/8015), TPH-D (EPA method 3510/8015), TOG (standard method 5520 B&F or <br /> EPA method 418.1), and BTEX (EPA method 602). <br /> QUALITY ASSURANCE/QUALITY CONTROL AND CHAIN OF CUSTODY PROCEDURES <br /> In order to ensure a successful sampling program, Quality Control and Quality Assurance procedures will <br /> be carefully followed. The key points of the Quality Assurance procedures pertain to the submittal of quality <br /> assurance samples and document control (decontamination procedures have been previously discussed). <br /> Quality Assurance Samples <br /> Quality assurance samples will be used to evaluate the quality of the data obtained from the field program. <br /> Two distinct types of quality assurance samples will be used for this purpose. <br /> 1. Blind duplicates of water samples will be submitted to the testing laboratory at a minimum rate <br /> of 1 per 10 regular samples obtained. <br /> 2. Field travel blanks will be submitted at a rate of 1 per 10 water samples collected, but no less than <br /> one per ice chest in order to determine if cross contamination occurred in transit. All field travel <br /> blanks will be supplied by the testing laboratory. <br /> Soil and groundwater samples will be submitted to a State of California-certified analytical laboratory for <br /> chemical analyses. Established QA/QC procedures for analytical operations will include sample custody <br /> procedures, standards of analytical accuracy, analyses of matrix spikes and method blanks, data reduction, <br /> verification of raw analytical data, and maintenance of control charts to monitor analytical performance. <br /> These QA/QC procedures are outlined in the laboratory Quality Assurance/Quality Control 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 "Guidelines <br /> cca/9-30-92/8913a/JAWP13 12 <br />