COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

WASTE DISCHARGE REQUIR. _ENTS ORDER NO. 5-01-055 -3- TRI VALLEY GROWERS PLANT NO. 4 STOCKTON, SAN JOAQUIN COUNTY range of electrical conductivity, total dissolved solids, and fixed dissolved solids from 1998 and 1999 is also presented. BOD Range Total Nitrogen EC TDS FDS (lbs/acre day) (lbs/acre day) (umhos/cm) imgm Lmgm min max min max min max min max min max January 3.0 - 16.9 0.05 - 0.34 527- 1,105 797- 1,762 430 - 1,060 February 8.4 - 45.4 0.18 - 1.5 690- 1,402 957-2,637 463 - 1,038 March 8.6 - 59.9 0.28 - 1.23 862-862 1,575-4,575 760- 960 April 5.1 - 16.1 0.12 - 0.3 770-815 1,100- 1,122 568 - 733 May 1.6 - 7.9 0.04 - 0.19 1,130- 1,132 770- 1,395 450 - 670 June 2.4 - 24.0 0.04 - 0.82 877- 1,022 1,447- 1,692 623 - 945 July 4.9 - 46.5 0.1 - 1.03 885- 1,477 1,607-9,302 935 - NA August 16.2 - 93.8 0.53 - 2.26 605-712 855-937 368 - NA September 9.8 - 57.5 0.53 - 2.39 530-752 560-892 503 - NA October 1.6 - 16.3 0.07 - 0.65 490-683 510-926 450 - NA November 0.1 - 10.0 0.01 - 0.2 540-985 453- 875 333 - NA December 2.0 - 23.5 0.07 - 0.93 503- 1,025 647-2,105 327 - NA NA denotes only one datum was available for the time period indicated. EC denotes Electrical Conductivity. TDS denotes Total Dissolved Solids. FDS denotes Fixed Dissolved Solids. BOD denotes five day Biochemical Oxygen Demand. 16. Prior to the adoption of WDRs No. 95-167, the Discharger was discharging wastewater with a electrical conductance of 700 to 12,000 µmhos/cm. As required by the WDRs, the Discharger implemented process changes at the facility and significantly reduced the electrical conductivity of the wastewater. The wastewater continues to contain excessive concentrations of dissolved solids. This Order requires reductions in dissolved solids concentration reductions. 17. Each field is divided into irrigation checks, and the furrows are graded with a shallow slope to distribute the wastewater. 18. Checks receive the wastewater by flood irrigation until they become saturated. The discharge is then directed to a different field. There are no tailwater return systems, so all wastewater must percolate or evaporate. 19. Order 95-167 limited land application of wastewater to the land application area north of Bear Creek during the wet months due to a restriction imposed by the U.S. Corps of Engineers for flood control purposes. The Discharger installed conveyance piping beneath the stream bed of Bear Creek and can now discharge to the areas south of Bear Creek during wet months if conditions allow. 20. The water balance provided by the Discharger indicates rainwater will pond in the fields in the months between November through February during the 100-year return annual total rainfall events, and between December and January during a normal rainfall year. Because this Order states that wastewater shall not be discharged when the soil is saturated, the Discharger must provide storage capacity for the wastewater or halt all wastewater discharges.