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N-l Percolation Pond

An alternative mode of operation allowed the waste stream to be neutralized In the surge tanks by recirculation and pH adjustment. On reaching proper pH, the liquid was sent to the 1324 NA (120-N-l) Percolation Pond through a 20-cm (8-1n.) chemical waste pipeline. Analyses have confirmed that after neutralization the effluent stream no longer exhibited the dangerous waste characteristic of corrosivity. The surge tank is surrounded by a concrete berm capable of containing the entire volume of the tank If a spill occurred (DOE-RL 1990). [Pg.56]

In November 1988 use of the 120-N-2 (1324-N) surface impoundment was discontinued when the newly constructed ENU was put on line inside the 163-N facility. The ENU neutralizes the spent regenerant before it is discharged to the 120-N-l percolation pond, and does so with greater efficiency and operator control than was possible in the 120-N-2 facility (DOE-RL 1990). [Pg.60]

The filter backwash discharge pond was placed In service In early 1983 following reconstruction of the 120-N-l percolation pond, which was formerly used for disposal of the backwash effluent. The pond Is fed via a 25- to 30-cm (10- to 12-1n.) burled line from the 183-N filtered water plant. Approximately 1,100,000 L/day (300,000 gal/day) of backwash effluent were disposed of at the unit. The 183-N filter backwash effluent has a neutral pH and contains low concentrations of several anions and cations (DOE-RL 1990). Aluminum sulfate (alum) Is used as a flocculent and polyacrylamide Is used as a filter ald/coagulant In filtered water production (DOE-RL 1990). Analysis of the filter backwash effluent Indicates that It does not contain any listed dangerous wastes or dangerous waste sources, or exhibit any dangerous waste characteristics or criteria per WAC 173-303 (DOE-RL 1990). Table 5-9 shows representative analyses of the filter backwash effluent. [Pg.148]

Wells 199-N-16, -21, -23, -24, -25, -47, -58, -59, -60, and -61 all have had concentrations greater than 10,000 xg/L. These wells are all downgradient from the 120-N-l percolation pond and the 120-N-2 surface impoundment. The source of the sodium appears to be the sodium hydroxide used in the anion regeneration process and then discharged to 120-N-l and 120-N-2 (DOE-RL 1991). [Pg.159]

Since early 1986, the 120-N-l (1324-NA) percolation pond has received only neutralized wastewater because construction of the lined 120-N-2 surface impoundment in that year provided a means of neutralizing and mixing the spent regenerant (in batches from successive regenerations) from the 163-N facility before discharging it to 120-N-l. The neutralizing process involves treating individual batches with either sulfuric acid or sodium hydroxide, as appropriate. From 120-N-2, the neutralized wastewater was then piped to the 120-N-l for disposal (DOE-RL 1990). [Pg.60]

N-l Filter Backwash Discharge Fond. The 130-N-l filter backwash discharge pond 1s a percolation pond used for disposal of effluents generated during backwash of the sand filters In the 183-N filtered water plant. The pond Is a natural basin, marsh-like In appearance, located about 0.8 km (0.5 ml) southeast of the N Reactor building. [Pg.148]

Table 8-3 presents the estimated cost for remediation of the 100-NR-l and lOO-NR-2 operable work units, which includes the remedial action and post-closure monitoring at the 1301-N LWDF, 1325-N LWDF, 1324-N surface impoundment, and 1324-NA percolation pond the RPP facilities at 100 N). [Pg.263]


See other pages where N-l Percolation Pond is mentioned: [Pg.13]    [Pg.13]    [Pg.55]    [Pg.60]    [Pg.141]    [Pg.141]    [Pg.142]    [Pg.146]    [Pg.146]    [Pg.146]    [Pg.147]    [Pg.147]    [Pg.147]    [Pg.148]    [Pg.151]    [Pg.155]    [Pg.156]    [Pg.182]    [Pg.183]    [Pg.13]    [Pg.13]    [Pg.55]    [Pg.60]    [Pg.141]    [Pg.141]    [Pg.142]    [Pg.146]    [Pg.146]    [Pg.146]    [Pg.147]    [Pg.147]    [Pg.147]    [Pg.148]    [Pg.151]    [Pg.155]    [Pg.156]    [Pg.182]    [Pg.183]    [Pg.56]    [Pg.118]   


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