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<br />Observation of the unnamed drainage downgradient of the tailings disposal area revealed <br />the presence of a dearly defined surface water drainage channel 8-12 feet in width. The <br />channel was dry at the time of observation and exhibited no evidence of recent flow. No <br />wetlands or other sensitive environments were noted to be present in the drainage. <br />The Salazar Reservoir was completely void of water at the time of sampling; however, the <br />ditch (dimensions 2 feet by 4 feet) from which water is diverted into the reservoir was <br />flowing appreaably. , <br />Physical measurements including pH, conductivity and temperature were measured and <br />recorded for each surface water sample location. Physical measurements indicated <br />increasing trends in Rito Seco surface water pH, temperature and conductivity at <br />downstream locations. Sediment composition was visually noted and recorded. <br />Sediment samples were predominatey composed of light brown sift sand. <br />Quality Control Samples. <br />A duplicate of sample BM-SW-02 was collected and designated BM-SW-06 as a quality <br />control ched< for the CLP laboratory. An equipment decontamination rinse blank, <br />designated BM-SW-07, was collected by rinsing sampling equipment with distilled water <br />and collecting and preserving the water in appropriate containers. Matrix spike and matrbc <br />spike duplicate volumes were collected from the BMSW-03 location. <br />San~le Corttainers and Documerttatlon <br />Surface water samples designated for total metals and cyanide anayses were collected <br />in separate 1-liter polyethylene bottles. Sediment samples designated for total metals and <br />cyanide analyses were collected in a single 8-0unce glass jar. Surface water samples <br />were preserved with nitric add (total metals) and sodium hydroxide (cyanide). All <br />samples were maintained at approximately 4°C with ice at all times. <br />All samples were shipped to Southwest Laboratories of Oklahoma located in Broken <br />Arrow, Oklahoma via FedEx on April 27, 1995 under Airbill number 3569962734. All <br />samples were to be analyzed under Regular Analytical Services (RAS) protocols at low <br />or environmental concentrations for total metals and cyanide. Case #23473 was <br />assigned to analyses assoclated with this SI. <br />a~so5xoa~.m~a~mrx - 3 - m.r 4 4nLb1 <br />