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3. 1 Sampling Procedures (Section B.4.0 of the Phase II Work Plan) Tables 3-1 and 3-2 list the proposed samples to be collected for soils/sediments, and waters, respectively. 3.2 Analytical Procedures (Section B.7.0 of the Phase II Work Plan) Chemical analysis of the Phase III samples will be performed by Environmental Science and Engineering, Inc. (ESE) in Gainesville, Florida and Quanterra, Inc. (Quanterra) in Sacramento, California. ESE will perform all analyses except for total petroleum hydrocarbons and total and hexavalent chromium. Both laboratories are approved by the U.S. Army Corps of Engineers (USACE), MRD Division and the State of California to perform the required analyses. In addition to the methods listed in Table B-5 of the Phase II Work Plan,Method 7196 will be used for the analysis of groundwater and soil samples for hexavalent chromium. The method reporting limits for the total and hexavalent chromium analyses are shown in Table 3-3. Sample container requirements and maximum acceptable holding times will be as noted in the Phase II Work Plan with additional requirements for chromium analyses, as noted in Table 3-4. 3.3 Data Reduction, Validation, and Reporting (Section B.8.0 of the Phase II Work Plan) All Phase III data will be subject to baseline data validation (Level III) as described in Section B.8.2 of the Phase II Work Plan. Due to the limited number of samples to be collected and to the condensed schedule associated with the Phase III investigation, Level IV data validation will not be conducted. 4.0 PHASE III HEALTH AND SAFETY PLAN Health and safety procedures will be performed in accordance with Appendix C of the Phase II Work Plan. There are no planned modifications for Phase M. 5.0 PHASE III SCHEDULE The proposed schedule for conducting the Phase III investigation is presented in Figure 7. As the project progresses, the consultant will continuously monitor actual progress against the schedule due dates. The consultant will then be responsible for maintaining, and if necessary, updating the project schedule. The consultant will keep the CEHND informed of any known or anticipated delay or acceleration of project activities. 4