Document RjkyVa4Y3oL82vrDOk7JDOd18

RADIAN CORPORATION 19 April 1990 8501 Mo-Pac Blvd. RO. Box 2010S8 Austin, TX 78720-1088 |512}454-4797 Mr. Michael T. Viseley Process Engineering Department Vista Chemical Company 900 Threadneedle P.0. Box 19029 Houston, Texas 77079 RE: Proposal for Metals Removal Technology Evaluation (VCM Facility) Dear Mike: Pursuant to our discussions in Houston on 17 April 1990, Radian Corporation can provide to Vista Chemical Company the following: An engineering evaluation of alternative technologies for metals removal from organic chemicals wastewaters. This evaluation will include an analysis of state-of-the-art technologies; probable capital and operation/maintenance costs with respect to the VCM wastewater problem; and effluent quality achieved under normal operating conditions. An engineering evaluation of alternative conceptual wastewater treatment systems for dissolved and total rcetals removal. This activity will involve a review and critique of the proposed Vista VCM metals removal process flow diagram (dated 16 April 1990), and approaches suggested by Radian as possible alternatives which would also meet target effluent quality. Radian will also examine the feasibility of a combined stormwater and process wastewater treatment system for metals removal. The evaluation will include estimates of capital and operation/maintenance costs for the selected alternatives so that the roost appropriate options can be evaluated by treatability testing. Bench-scale treatability testing will be conducted on a composite sample provided by Vista Chemical. At this time, two tests are envisioned, one with equipment wash wastewater and one with a combined sxormwacer and equipment wash wastewater. Vista will also need to provide Radian with an appropriate volume of stormwater runoff for admixture with the process wastewaters. It is our intention to conduct coagulation/precipitatlon tests using a standard jar test apparatus. The samples will be evaluated for coagulant dose, Ph effects, and sludge thickening/settleability. Metals analysis will be performed by ICP and graphite furnace AAS. The results of thfe study will be presented in a brief technical memorandum to Vista within six (6) weeks of sample receipt. CUH 000010302 0`d "WlOi RADIAN Mr, Michael T. Wiseley 19 April 1990 Page 2 Program costs are estimated as follows: Task 1: Activity Technology Assessment Task 2: Treatment System Alternatives Task 3: Treatability Study Totals Labor Hours 37 50 Analytical - ODC $100 $200 Total Cost $2,890 $3.7^0 70 157 $1,980 $1,980 $500 $800 $6,750 $13,280 Analytical costs include analysis for nickel, copper, zinc, and lead in the wastewater samples, Sample duplicates, matrix spikes, and matrix spike duplicates are included in the cost of analysis. Should you require additional information or clarification of the proposed test program, please contact me. Sincerely, ,^7/W-A. Frank J, Castaldi, Ph.D., P.E. Principal Engineer Process Engineering Department FJC:kla cc: M. L. Owen (4) R. Ahmed (Houston) CWH 000010303