to: Vista's Lake Charles Personnel Interoffice Communication From: Date: Subject Lake Charles Plant Managers March 9, 1990 Toxic Characteristic (TC) Environmental Remediation Project Organization - LCCC VISTA There are several projects to be executed at LCCC in response to the recently promulgated TC regulation- Basically, we will (1) re-route all TC wastewater streams to the VCM wastewater treatment system, (2) press and load LCVCM biological solids and LCLAB calcium fluoride solids at the VCM ASU area, and (3) bioremediate all LCCP and LCLAB pond sludges to below TC levels.

ItitroHtw Communication J.

TO: Distribution UK* J&ft-.

TO: Distribution Interoffice Communication FROM: DATE: SUBJ: Frank G.

TO: Interoffice Communication FROM: DATE: SUBJ: Distribution TGG: JCL: ERT: MJH: AJO:?

Vista Chemical Company 900 Threadneedle Houston, Texas 77079 (713) 588-3000 P.O.

I To: OSHA File Interoffice Communication From: Dote: Subject: Randy Istre April 12,1990 Detected Areas in Blank Wafers VISTA In determining the 95% confidence limit for EDC, several added steps were taken because of detectedi areas appearing in blank Organic Vapor Monitor Wafers which have the same retention time as EDC.

TO: Distribution TGG: JCL: FGJ: AC: AJO: RF XF: * * Interoffice Communication FROM: DATE: SUBJ: T.

TO: Dave Penney-Austin Interoffice Communication FROM: DATE: SUBJ: T.

TO: Dave Penney-Austin Tesvjei: Interoffice Communication FROM: DATE: SUBJ: T.

TO: R.

Vista Chemical Company 900 Threadneedie Houston, Texas 77079-2990 (71 3) 588-3000 P.O.

TO: Interoffice Communication FROM: DATE: SUBJ: Distribution XF: T.

Vista Chemical Company 900 Threadneedie Houston.

TO: Distribution ilV ^ - XF Interoffice Communication FROM: DATE: SUBJ: T.