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1 • • <br />2. The samples will be retained in the sample liners with the ends covered with <br />aluminum foil or Teflon sheets. Plastic end caps will be attached and secured <br />with plastic adhesive tape. <br />' 3. Each sample will be labeled using waterproof ink with the job name, job <br />number, boring number, sample depth, date collected, and the initials of the <br />person who collected the sample. <br />' 4. A description of the soil sample will be entered on a boring log form by <br />the field geologist. This description will include soil classification <br />(ASTM D-2487-83), color, moisture content and consistency (in relative terms), <br />' and estimated degree of hydrocarbon content (e.g., using measurements made <br />from a photoionization detector). <br />5. Immediately after sample collection and labeling, the samples will be sealed <br />in a plastic bag and placed in a sturdy ice chest. <br />6. When the ice chest is full (or contains all the samples which will be stored <br />in it), a completed chain of custody form will be inserted and the chest will <br />be closed and sealed. <br />Selected soil samples (approximately two per boring) will be submitted to a State of <br />California -certified laboratory for chemical analyses (Chromalab, San Ramon). These samples <br />will be analyzed for total petroleum hydrocarbons as gasoline (TPH-G) by EPA method <br />' 5030/8015, total petroleum hydrocarbons as diesel (TPH-D) by EPA method 3550/8015, total <br />oil and grease (TOG) by standard method 5520 D&F, and benzene, toluene, ethylbenzene, and <br />xylenes (BTEX) by EPA method 8020. <br />' Groundwater monitoring wells will not be installed as part of this workplan. If it appears that <br />groundwater has been impacted at the site based on the results of this investigation, a <br />separate workplan may be prepared which addresses groundwater assessment and monitoring <br />' procedures. <br />' QUALITY ASSURANCE/QUALITY CONTROL AND CHAIN -OF -CUSTODY PROCEDURES <br />In order to ensure a successful sampling program, Quality Control and Quality Assurance <br />' procedures must be carefully followed. The key points of the Quality Assurance procedures <br />pertain to the submittal of quality assurance samples and document control (decontamination <br />' procedures have been previously discussed). <br />Quality Assurance/Quality Control Procedures <br />Soil 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 <br />sample custody procedures, standards of analytical accuracy, analyses of matrix spikes and <br />method blanks, data reduction, verification of raw analytical data, and maintenance of control <br />charts to monitor analytical performance. These QA/QC procedures are outlined in the <br />laboratory Quality Assurance/Quality Control Plan which is available upon request. Organic <br />' cca09-23-92/8787a.51/cp31 6 <br />