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.'"" n 3+E':ss�p �� f-,�'a",5*". ... �-t� � -�;.gra t:� �,"�`-r�C.i-�`,"4� �?�.. _ ,_,� 3� �' ��t�w-� �. `�`'"-:,� G:c ^.,w,5?�:: •R,+�C �z•.�i�+w>, ,t ..�y .�Y u E. TIM 2.0 ANALYTICAL. PROCF.DtJRFR Selected soil samples submitted to the laboratory were analyzed for BTEX,and TPH,using EPA Methods 8015 and S020. Ground water mrnples submitted to the laboratory were analyzed for the same constituents as the soil samples using EPA Methods 8015 and 8020. 3.0 QUALITY ASSuRANCF, PInN This item describes the field and analytical procedures to be followed throughout the investigation. 3.1 General Sam le CoilectlorLnd Flandllne Procedures Proper collection and handling are essential to ensure the quality of a sample. Each sample was collected in a suitable container, presened correctly for the intended analysis,and stored prior to analysis for no longer than the mabmum allo"Nable holding time. Details on the procedure for collection and handling of soil samples used on thisro'ect can be found in Section 1.0(Methods). 1 P�� J 3.2 Sample ldentiFeatien a;;t Chain-o&Custody Procrtlures Sample identifialtion and chain-of-custody procedures ensure sample integrity and document sample Possession from the time of collection to its ultimate disposal. Each sample container submitted for analysis had a label afftated to identify the job number, sampler, date, time of sample collection, and a sample number unique to 11rut sample. This information, in addition to a description of the sample,field measurements made, sampling methodology, names of on-site personnel, and any other pertinent field Observations were recorded on the borehole log or in the field records. Samples were analyzed by a California-certified laboratciry, ..A chain-of-custody form was used to record possession of the sample from time of collection In its arrival at the ?aboratory. When the samples were shipped, the person in custody of them relinquished the samplV1 by signing the chain-of-custody form and ming the time. The sample-control officer at the laboratory verified samp'e integrity and confirmed that it was 1WHected in the proper container,preserved correctly, and that there is an adequate volume for anz,lysis. Having met these conditions, the sample was assigned a unique log number for identification throughout analysis and reporting,. The log number was recorded on the chain-of-custody form and in the lcaally- required log book maintained by the laboratory. The sample description,date rec,ived, client's name,and any other relevant information was also recorded,