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Austin Road Landfill Appendix B Contaminant Plume Characterization Report Field Procedures bags and placed in the ice chests. All ice chests were sealed with strapping tape and chain-of- custody seals. Groundwater samples for volatile organic compound(VOC)analyses were collected in three 40-ml glass vials with Teflon-lined silicon septa and black phenolic caps. Each sample vial was preserved with two drops 1:1 HCL Soil samples for TOC grain size and surface area analyses were collected in ziplock bags. These samples were placed into ice chests,chilled to 4°C,and shipped via courier to APPL. B.4.3 Sample Identification A coding system was used that is designed to uniquely identify a sample and to allow tracking and retrieval of specific information concerning the sample. The coding system used for the soil borings in this study is as follows: ■ The first three letters represent the site investigation identification code,established as ARL(Austin Road Landfill)and will be followed by a hyphen. ■ The next alphanumeric set indicates the boring location:l followed by A,B,or C for the borings in the first transect area;2 followed by A for the borings in the second transect area;and 3 followed by A or B for the borings in the third transect. This alphanumeric set is also be followed by a hyphen. ■ The next two letters followed by a hyphen represents the media type if the media was groundwater(GW). The lack of these letters indicates that the sample media was soil. ■ Finally,a two-to three-digit code will be used to establish the sample depth in feet. For example,the code ARL-1A-GW80 would indicate a groundwater sample(GW)collected from a depth of 80 feet from the initial boring of the first transect during the plume study at the Austin Road Landfill(ARL). In some cases(ARL-3B and ARL-4A),the letters GW were not inserted into the groundwater sample names. This has been changed in the tables and figures in this report to reflect the coding system as describe above,but remains as initially documented in the log book and analytical reports. B.4.4 Sample Labeling Sample labels contained an abbreviated summary of the information contained in the field log book. Sample label information was written with waterproof,indelible ink. Sample labels contained the following information: ■ job name and number ■ Sampling site CS 010812 CDM Camp Dresser&McKee city of Stockton 190855-00% B-5 W:IREPORTMTOCKTON A.RLKUME.WWPXMWPO