COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

procedures used by the laboratory during the soil sample analysis are provided in the analytical data results provided by the laboratory. Soil vapor samples will be collected in 1 -Liter Summa canisters provided by BC Laboratories. Soil vapor samples will be collected in general accordance with the Department of Toxic Substances Control (DTSC) and RWQCB guidelines set forth in their report Advisory — Active Soil Gas Investigations. Analytical methods, containers, preservatives, and hold times to be used or that may be used during the soil vapor sampling and analysis phase of the scope of work are summarized in Table 2. QAQC procedures used by the laboratory during the soil vapor sample analysis are provided in the analytical data results provided by the laboratory. Groundwater samples will be collected in 40mL glass VOAs preserved with HCl provided by BC Laboratories. The groundwater samples will be placed into the appropriate laboratory supplied containers, checked for headspace, uniquely labeled, placed into an ice chest cooled to less than 6°C, and transported to BC Laboratories under chain of custody protocol. Analytical methods, containers, preservatives, and hold times to be used or that may be used during the groundwater sampling and analysis phase of the scope of work are summarized in Table 3. QAQC procedures used by the laboratory during the groundwater sample analysis are provided in the analytical data results provided by the laboratory. 3.0 QUALITY CONTROL FIELD SAMPLES A Quality Control (QC) program independent from the laboratory's program will be instituted. The program will entail "blind" submittals to the laboratory of blank and duplicate samples. All QC samples will be assigned independent sample numbers and made indistinguishable from non -QC samples. Travel Blanks A travel blank will be used to monitor sample contamination during sampling, transport and storage. For vapor sampling, the travel blanks will be provided by the laboratory and consist of empty canisters filled with contaminant free air from a certified source. They will be taken to the field and accompany the collected samples to the laboratory for analysis. The blank will be numbered, packaged, and sealed in the same manner as the other samples. Duplicate Samples Duplicate samples equal to 10% of the total collected will be submitted to the laboratory to monitor sampling precision. The duplicate sample points will be selected randomly selected. 4.0 SAMPLE COLLECTION PROCEDURE During sampling, latex or nitrile gloves will be worn to prevent cross -contamination with other samples. The disposable gloves will be discarded after collecting each sample. Sample containers will be pre -cooled and transported to the site in the cooler. All samples will be preserved and the desired sample mass will be collected in the proper container as indicated on Table 4 and placed in a refrigerated container immediately after collection and maintained at a temperature less than 6 oC. Further discussion of sample preservation is included in the sampling protocols (Sections 9 and 10).