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• The signatures of all samplers and/or the sampling team leader in the designated signature block; • The sampling station number, date, and time of sample collection, and sample preservation type must be included on each line (each line shall contain only those samples collected at a specific location); • The field investigator and subsequent transferee(s) must document the transfer of the samples listed on the COC in the spaces provided at the bottom of the form (both the person relinquishing the samples and the person receiving them must sign the form; provide the date and time that this occurred in the proper space on the form; and usually, the last person receiving the samples or evidence should be a laboratory sample custodian); • The COC is a serialized document. Once the Record is completed, it becomes an accountable document and must be maintained in the project file. The suitability of any other form for COC should be evaluated upon its inclusion of all of the above information in a legible format. 4.2 Sample Nomenclature Groundwater, soil vapor, sub-slab vapor, and indoor/outdoor samples will be labeled in the field using the date collected in a YYYYMMDD (Year, Month, Day) format followed by the location name (ex. 20211122-MW-6C). Field duplicates will have the same format as the original sample followed by DUP (ex. 20211122-MW-6C-DUP). Equipment blank and trip blank samples will be labeled in the field using the date collected in a YYYYMMDD format followed by EB or TB, respectively, then followed by a two-digit number designating the sequence the blank was taken(ex. 20211122-TB- 01). 4.3 Sample Packajinj! and Handling As samples are collected in the field, they will be handled and placed into containers as specified by the laboratory. Each sample label will specify the analyses to be completed for that particular container(i.e. containers to be analyzed for VOCs by USEPA Method 8260B will be labeled as such, etc.). A list of appropriate analyses for each sample will be included on a completed sample COC form for the laboratory. The COCs will include the sample identification, location, date and time of the sampling, number and type of containers, and a list of analyses to be performed. Sample documentation will be completed in the field, and the COCs will accompany the samples through the transportation and analysis. Samples will be packed in ice chests containing sealed blue ice or wet ice. Special care will be taken to pack containers to minimize breakage. Appendix C 12