Laserfiche WebLink
Appendix A <br /> Groundwater Sampling Procedures And Logs <br /> A.1 WATER LEVEL MEASUREMENT <br /> The depth to water will be measured using a solinet (or equivalent) water level ;peter to the <br /> nearest 0 01 foot The depth to the static water level will be measured by lowering the probe into <br /> the well and obtaining two successive readings that agree to within 0 01 feet Measurements will <br /> be referenced to a mark at the top of the well casing <br /> A.2 GROUNDWATER SAMPLING <br /> Routine groundwater sampling has been conducted using conventional procedures and <br /> equipment, described below by Professional Services Industries (PSI) under contract to Caltrans <br /> The conventional procedures consist of purging the well and collecting samples with bailers after <br /> ample recovery In addition, selected were sampled in April 1999 using a KabisTM H Sampler for <br /> 4-inch wells (the KabtsTm I sampler is for 2-inch wells) The Kabisrm II Sampler is designed to <br /> collect groundwater samples in triplicate at discrete depths When analyzed, the samples may <br /> provide a vertical profile of the water chemistry within the well <br /> lie A 2.1 Sample Collection using the KabISTM 11 Sampler (Vertical Groundwater Sampling) <br /> Discrete, vertical groundwater samples were collected at up to three depths within selected wells <br /> using the KabisTM II Sampler The Kab1STM H Sampler is designed to collect three 40-milliliter <br /> vials of groundwater at discrete depths The KabisTM II Sampler is described in more detail in <br /> Appendix B <br /> A.2.2 Decontamination Procedures <br /> Groundwater samples will be collected using a decontaminated KabisTM Sampler to avoid cross- <br /> contamination between wells Reusable groundwater sampling equipment will be decontaminated <br /> between each sampling interval using the following procedures <br /> 1 Wash with Liquinox and brush, to remove contaminants <br /> 2 Second wash with Liquinox and brush <br /> r3 Rinse with deionized water <br /> 4 Second rinse with deionized water <br /> 5 Dry with paper towels or drip dry <br /> A 2.3 Quality Assurance Samples <br /> Field blank and duplicate samples were collected in appropriate sample bottles during sampling <br /> • activities Samples collected using the KabisTM II Sampler will be in triplicate The laboratory for <br /> duplicate analysis retained the second and third 40-milliliter vials, where necessary One nnsate <br /> S 4PRpAg1040100044SHOP101S40P105A.DOC A-1 URS Greiner Woodward Clyde <br />