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' . k` ■ KLEINFELDER 1 EXECUTIVE SUMMARY ' Musco Olive Products, Inc. has a year-round olive processing and packaging facility on approximately 320 acres of land at 17950 Via Nicolo in Tracy, California (Plate 1). Process ' water from the production of olives generates non-hazardous waste streams of water. Approximately 400,000 to 500,000 gallons per day (gpd) of wastewater are generated from the facility processes. Depending on the level of salinity of the wastewater, the facility currently applies the wastewater onto crop/grazing fields, approximately 150-acres (Plate 2), or stores the wastewater in an existing one million-gallon storage pond. The wastewater generated is ' currently regulated by two separate waste discharge requirements. Order No. 96-075 regulates the Class II Surface Impoundment which stores concentrated brine waters, and Order No. 97-037 ' regulates the land application of the less concentrated process water. A 72 million-gallon surface impoundment will be constructed for storage of the wastewater. ' Kleinfelder prepared a workplan for Musco Olive Inc. in response to requests from the Central ' Valley Regional Water Quality Control Board (RWQCB) Cleanup and Abatement Order No. 5- 00-717 (C&A 5-00-717) dated November 17, 2000. The Cleanup and Abatement Order addressed violations of Order 97-037 regarding land applications of wastewater. The exploratory ' soil borings proposed in the workplan were intended to evaluate subsurface conditions at the existing one million-gallon storage pond, the proposed 72 million-gallon storage pond(s), and the ' land application disposal fields. ' Kleinfelder drilled two soil borings, one near the one-million pond, and one near the area of the proposed seventy-two million gallon pond to assess soil and groundwater. Soil samples collected ' from the observed aquitard layers were analyzed for hydraulic conductivity and grain size analysis. Groundwater samples were analyzed for sodium, chloride, total dissolved solids, -�.... dissolved inorganic solids, and e ec nca conductance. Soil samples were collected from the deep soil borings from what was interpreted to be clay ' material. The soil samples were analyzed for hydraulic conductivity using a falling head permeameter. The soil samples collected from the deep soil boring near the 1 million gallon ' pond (TW-1) had a permeability ranging from 8.0 x 10-8 cm/sec to 9.60 x10-8 cm/sec. The soil samples collected from the proposed 72 million gallon pond (TW-2) showed a permeability of ' 9.0 x 10-6 to 4.14 x 10-7 cm/sec, typically an engineered clay liner for a pond will required a permeability of 10-6 magnitude. The clays encountered in the deep soil borings are 20-2594-03.004/2011 R447 Page I of 16 ' Copyright 2001 Kleinfelder,Inc. June 8,2001