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Observations and Sample Collection Explanations <br /> a.When Robertson-Ceco Corp. is unable to collect any of the <br /> required samples or perform visual observations due to adverse <br /> climatic conditions, A description of why the sampling or visual <br /> observations could not be conducted, including documentation of all <br /> significant storm water discharge events will be submitted along with <br /> the annual monitoring report. <br /> b.Sampling and visual observations will be made during scheduled <br /> facility operating hours, or within two hours prior to or following <br /> scheduled facility operation hours. Visual observations will be made <br /> during daylight hours only. If samples or visual observations are not <br /> made due to this exception, Robertson-Ceco Corp. shall include <br /> documentation in the annual monitoring report. <br /> Standard Methods <br /> All sampling and sample preservation shall be in accordance with the <br /> current edition of Standard Methods for the Examination of Water and <br /> Waste water (American Public Health Association) for water samples, <br /> and EPA SW-846 Test Methods for Evaluating Solid Waste <br /> Physical Chemical Methods, for soil and sediment samples. All <br /> monitoring instruments and equipment shall be calibrated and <br /> maintained in accordance with manufacturers' specifications to ensure <br /> accurate measurements. All analyses must be conducted according to test <br /> procedures under 40 CFR Part 136, unless other test procedures have been <br /> specified in the General Permit or by the Regional Board. All metals shall <br /> be reported as total metals. Toxicity tests shall be conducted in accordance <br /> with the latest revisions of Methods for Measuring the Acute Toxicity Of <br /> Effluent to Freshwater and Marine Organisms, EPA-600/4-85-013 (March <br /> 1985). All analyses shall be conducted at a laboratory certified for such <br /> analyses by the State Department of Health Services. <br /> 15.Records <br /> Records of all storm water monitoring information and copies of all <br /> reports required by the General Permit shall be retained for a period of at <br /> least five years from the date of the sample, observation, measurement, <br /> or report. <br />