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South San Joaquin irrigation district <br /> DRAFT Lead Assessment&Abatement Work Plan April 9, 2017 <br /> 3.0 Assessment and Abatement Methodology <br /> 3.1 Surfacewater Sampling and Analysis <br /> Each month of the irrigation season, SSJID will collect one (1) canal surfacewater sample both <br /> upstream and downstream of the ESC. Samples will be collected approximately mid depth and from <br /> the center and of the canal. The upstream sample will be collected at Drop 7 and the downstream <br /> sample at Drop 8. Refer to Figure 5. The samples will be analyzed for total and soluble lead by <br /> USEPA Method 200.7 or equivalent. <br /> One (1) duplicate and one (1) equipment blank sample will be collected during each sampling event <br /> for quality assurance and quality control (QA/QC) purposes and in order to assess sampling <br /> accuracy and precision. <br /> Page 10 Blankinship & Associates , Inc . <br />