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Results of this test, as well as all data collected during this test, will b e presented in a report which will be included as an appendix to the corrective action plan TASK 3 -CONDUCT A CONSTANT RATE PUMPING TEST Based on the results of the step drawdown test outlined in Task 2, a 1,000-minute constant rate pumping test will be designed to determine the hydraulic conductivity and transmissivity in the shallow water-bearing zone, calculate the capture zone radius for the shallow zone, and t o determine whether deeper zones are affected by shallow pumping A large water storage tank will be delivered to contain water produced during this test The size of this tank will be determined by the results o f the step drawdown test Water levels will be measured in all site monitoring wells and piezometers prior to pumping Pressure transducers will be placed in monitoring wells/piezometers MW-5, MW-11, P-3, P-4, and P-5, and water levels will be recorded with a data logger Manual water level measurements will also be collected as a backup from these wells Manual water level measurements will also be collected from monitoring wells MW-13, MW-14 and MW-15 across West Yosemite • Avenue during the test If these "closer in" wells are affected, then water levels will also be measured in wells further out on an as needed basis (not anticipated due to the limited available drawdown) Groundwater samples will also be collected during this test at the following times Immediately upon the start of pumping, after 240- minutes of pumping, after 600-minutes of pumping and at the end of the test These groundwater samples will be contained in 40-m1 glass VOA vials, pre-preserved with hydrochloric acid, and sealed without headspace The samples will be labeled with the site location, sample designation, date and time the samples were collected, and the initials of the person collecting the samples The samples will be placed on ice f o r transport to the analytical laboratory under chain of custody The groundwater samples will be analyzed by a CALrEPA certified analytical laboratory for TPH-G, BTEX, oxygenates, alcohols and HVOCs by FPA Method 8260 and TPH-D by modified EPA Method 3550/8015 Results of this test, as well as all data collected during this test, will be presented in a report which will be included as an appendix to the • corrective action plan Frank's One Stop Workplan — June 2000 -18-