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Fixed Laboratory Testing Samples collected for fixed laboratory testing will be collected in one-liter Summa canisters provided by the laboratory. The flow rate during purging and sampling will be moderated to between 100 and 200 mL/min by the sampler to limit stripping of chemical compounds, to prevent ambient air from diluting the soil vapor samples, and to reduce the variability of sampling rates. Summa canisters will be transported to the offsite laboratory under proper chain of custody protocol. Samples will be tested for VOCs by USEPA Method TO-15. Summa canisters will be decontaminated by the laboratory and used to collect only a single sample; other sampling equipment that has the potential to come into contact with soil vapor (such as tubing) shall be used only one time and then contained for proper disposal. 5.10.3 Groundwater Monitoring Well Sampling Groundwater samples will be collected from the wells in approximately 48 hours following well development. Prior to collecting groundwater samples, The wells will be purged using a low-flow technique and groundwater samples collected once the groundwater purge parameters have stabilized. Specifically, stabilization will be considered to be achieved when three consecutive readings are within the following limits: turbidity (10% for values greater than 5 Nephelometric Turbidity Units), pH (+/- 0.1 unit), specific conductance (3%), dissolved oxygen (10% for values greater than 0.5 mg/L, if three dissolved oxygen values are less than 0.5 mg/L, consider the values as stabilized), oxidation/reduction potential (+/- 10 millivolts), and temperature (3%). Purging and sampling will be conducted using a controlled-flow Grunfos Redi-Flo2 electric submersible pump. Purge water will be temporarily stored on-site in DOT- approved steel 55-gallon drums. The handling and disposal of the purge water will be conducted in accordance with the procedures described for decontamination fluids and well development water and other IDW. The groundwater samples will be contained in 40-ml laboratory-grade VOA vials. Samples for analysis of TPH, PAHs, and PCBs will be contained in laboratory one-liter amber glass bottles and samples for analysis of metals will be contained in laboratory grade unpreserved 16-ounce polyethylene bottles. Samples for analysis of metals will be filtered in the laboratory prior to being preserved with nitric acid. The samples will be labeled with the project number, sampler's initials, boring number, and the time at which the sample was obtained. Following sample labeling, each sample will be placed into a thermal chest with synthetic ice to limit the volatilization of any constituents present. Groundwater samples will be preserved and transported within cooler chests containing ice and maintained at a temperature of approximately 4 degrees Celsius. Laboratory quality assurance/quality control (QA/QC) will be performed commensurate with US EPA Level II QA/QC procedures. 6.0 MANAGEMENT OF INVESTIGATION-DERIVED WASTE Investigation derived waste (IDW) consisting of drill cuttings (soil) and any decontamination fluids will be temporarily contained in DOT-approved steel 55-gallon drums. Partner is not the generator of the soil cuttings. The generator of the IDW will be SLP, who will be responsible for signing any manifests or bills of Sampling and Analysis Plan Tracy Corners Shopping Center 3225 North Tracy Boulevard Tracy,California 95376 Partner Project Number SM14-129814 Docket Number HAS-VCA 14/15-108 August 15,2016 Page 25