WORK PLANS - Laserfiche WebLink

Home Browse Search

4.3 SAMPLE TRACKING Each cooler shall contain at least one Chain-of-Custody (COC) form, and each sample placed in a given cooler shall be listed on a COC form placed in that cooler. The individual responsible for collecting the sample shall sign the COC form(s) and shall be responsible for com- pletely filling out the form(s) prior to shipment to the laboratory. COC form completion and maintenance will be performed in accordance with this SOP. The completed COC form(s) shall list all the samples contained in the cooler and shall specify the analytical parameters requested for each sample. The original COC forms will accompany the samples to the laboratory. Figure 3 is a typical Chain-of-Custody form. The laboratory will enter the following information on the COC form: • Name of person receiving the sample. • Date of sample receipt. • Sample condition. • Temperature of samples. All corrections to the COC record will be initialed and dated by the per- son making the corrections. Each COC form will include signatures of the appropriate individuals indicated on the form. The originals will accompany the samples to the laboratory, and copies documenting each custody change will be received and kept on file. Chains-of Custody will be maintained on file until final disposition of the samples. 4.4 QA/QC SAMPLES To identify potential errors, four types of QC samples will be analyzed by the analytical laboratory. All QC samples are labeled and sent to the laboratory along with the actual samples for analysis. The collection and handling of all QC samples will be documented in the field note- book. The five types of QC samples are described below. 4.4.1 Trip BIanks Trip blanks check for contamination due to handling, transport, contact with other samples during storage, or lab error. A VOC set filled with organic-free water is obtained from a lab. This set, along with the em- pty containers, are taken to the field, labeled with company name, date, A-%