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| Title | Basic American Foods Class II Groundwater Inspection | |||
| Month-Year Published | October 1998 | |||
| Online Availability |
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| Short Description |
The Washington State Department of Ecology (Ecology) conducted an NPDES Class II inspection of the Basic American Foods (BAF) vegetable processing facility in Moses Lake on April 27-29, 1998. The groundwater portion of the inspection consisted of: an audit of BAF groundwater sampling procedures, evaluation of the BAF groundwater monitoring network, comparison of Ecology and BAF split samples results, and an evaluation of BAF compliance with the NPDES permit effluent limits . (Also see abstract below) | |||
| Publication Number | 98-330 | |||
| Author(s) | Sinclair, K. | |||
| Print Availability | ||||
| Number of pages | 19 pp. + app.(36 total) | |||
| Keywords | ammonia, chemical, chemical oxygen demand, chloride, drinking water, effluent, flow, Ground Water, groundwater, Inspection, irrigation, lake, nitrate, nitrite, nitrogen, NPDES, protocol, waste, water, water quality, wells | |||
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| Abstract | Long Description |
The Washington State Department of Ecology (Ecology) conducted an NPDES Class II inspection of the Basic American Foods (BAF) vegetable processing facility in Moses Lake on April 27-29, 1998. The groundwater portion of the inspection consisted of: an audit of BAF groundwater sampling procedures, evaluation of the BAF groundwater monitoring network, comparison of Ecology and BAF split samples results, and an evaluation of BAF compliance with the NPDES permit effluent limits. BAF land applies an annual average of approximately 1.3 million gallons of wastewater per day to roughly 1,755 acres of agricultural farmland and treatment fields. The wastewater is high in chemical and biochemical oxygen demand, ammonia and organic nitrogen, phosphorous, total solids, and inorganic salts. The facility groundwater monitoring network consists of 12 dedicated monitoring wells and three irrigation wells. The monitoring well network adequately defines groundwater flow directions and facility impacts to groundwater quality within the sprayfield area. However, the network does not adequately characterize background conditions. All but two of the monitoring wells were constructed in accordance with Washington State well construction standards. BAF groundwater sampling procedures are consistent with current industry protocols. Differences between Ecology and BAF split sample results were generally within acceptable limits for all parameters except chloride, sulfate, and ortho-phosphate. BAF is complying with permit limits for annual and monthly discharge volumes. BAF wastewater management practices have resulted in degraded groundwater quality within the sprayfield vicinity. Groundwater nitrate+nitrite (N) concentrations exceeded the drinking water standard by more than 400 percent while TDS concentrations exceeded the standard by nearly 200 percent. |
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