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Field Investigation Work Plan Brookside Estates,Stockton, California 1/9/07 Sert Consulting, Inc. 4.2.4 Sample and Location Naming Convention P � ' The following sample identification system will be used for labeling all samples for laboratory use and data management. Sample type identifier: SS= Soil Sample,GW=Groundwater Sample SERT Subdivision Location Number: 1 =Brook Hollow, 2=Nostalgia,3 =Poppy Hills,4= Spyglass Sample Type Descriptor(SB)=Soil Boring ' Groundwater(GW) Unique Sample Location Number(SN) ' 4.2.S Sample Labelin,-Procedures Groundwater samples will be placed in containers provided by the analytical laboratory. A label will be firmly attached to the container side(not lid). The following information will be legibly written with indelible ink on the sample label attached to the sample container side: • Sample identification number • Preservation method, if any • Analyses to be performed s Sampling date ' • Sample time • Sample collector's name or initials. 4.2.6 Chain-of-Custody Procedures A chain-of-custody record is required for each shipment of samples. The form will be completed with all applicable information for each sample in the shipment. The record will be completed in indelible ink. Changes or corrections to the record will consist of line-out deletions(e.g., no"white-out" correction fluid)which are initiated and dated by the author of the change or correction. A copy of the chain-of- custody and other field documentation forms are provided in Appendix A. The chain-of-custody record will be completed by the field personnel who performed and/or witnessed the sample collection activity. After completion of the record down through the initial "Relinquished by" trow, a copy will be made of the record for retention by the originating field technician or designee. The original record will then be sealed in a plastic bag and secured in the shipping container. Samples will always be accompanied by a chain-of-custody record. When transferring samples,the individuals relinquishing and receiving the samples will sign and date the chain-of-custody record. Custody seals are not deemed necessary when the samples will be in continuous possession of technical or laboratory personnel. Custody seals will be used when samples are shipped via courier services. The chain-of-custody record will accompany each shipment. The method of shipment, couriers name(s), and other pertinent information will be entered in the chain-of-custody. 4.3 Field Quality Control Samples One duplicate groundwater sample will be retrieved from one location to measure the repeatability of the water analyses. 5.0 SCHEDULE \y�/ The anticipated schedule of the field activities described in this SAP during the period of January 14-1-x, 200V. Evaluation of the soil and groundwater testing is expected to be completed by early March, 200 . ®o