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Eli <br /> PRE-TANK REPLACEMENT Site Assessment work Plan <br /> 420 WEST KETTLEMAN LANE,LODi, CA. <br /> Aegis Project No. 89-013 <br /> — Page 13 <br /> 4.2 Soil classification <br /> As the samples are obtained in the field, they are classified by the <br /> engineer or geologist in accordance with the Unified Soil <br /> Classification System (USCS) . Representative portions of the samples <br /> are then returned to the laboratory for further examination and for <br /> verification of the field classification. Logs of the borings <br /> indicating the depth and identification of the various strata, the <br /> N. value, and pertinent information regarding the method of maintaining <br /> and advancing the borehole are also made. <br /> 4.3 Soil Sample Screen:4n . Portable Photoionization Detector Method <br /> After soil sample jars have been brought to ambient temperature, the <br /> head space of the soil sample jars will be screened with a portable <br /> photoionization detector equipped with a 10.2 eV lamp calibrated to <br /> benzene for direct reading in ppm. The sample jar lid will be opened <br /> and the detector probe -Immediately placed within the head space of the <br /> jar. The highest observed reading will be recorded. <br /> 4.4 Anal tical Procedures <br /> —-, All soil samples submitted to the laboratory will be analyzed for <br /> BTEX, 1,2-dichlorobenzene, 1,3--dichlorobenzene, and 1,4-dichloro- <br /> benzene by EPA method 8020, TPH by EPA method 8015 (modified) , total <br /> lead (TTLC) by EPA method 7421, inorganic lead (SCLC) by EPA method <br /> ( <br /> 6010 and organo lead by ASTM d3237-79 (modified) . <br /> 4.5 Quality Assurance Plan <br /> 4._5_...1 General Sample Collection and Handling Procedures <br /> Proper collection and handling are essential to eneure the quality of <br /> a sample. Each sample will be collected in a suitable container, <br /> -' preserved correctly for the. intended analyses, and stored prior to <br /> analysis for no longer than the maximum a'�lowable. holding time. <br /> Details on the procedure for collection and handling of soil samples <br /> J to be used on this project can be found in Section 4.1. <br /> # 4.5.2 Sample Identification and Chain-of-Custody Procedures <br /> i <br /> Sample identification and chain-of-custody procedures ensure sample <br /> . integrity and document sample possession from the time of collection <br /> ' to its ultimate disposal. Each sample container submitted for analysis <br /> -E will have a label affixed to identify the job number, date, and time <br /> of sample collection, and a sample number unique to that sample. This <br /> information, in addition to a description of the sample, field mea- <br /> surements made, sampling methodology, names of on-site personnel, and <br /> =--- -=.— =------any---other-pertinent--field-observat-ions-will-be-recorded--on--the-bore-- -- �- - _---- --- <br /> t <br />