They look at lead and DDT, as well as PCB's.

Part of this concern stems from the small anticipated sample size, leading to low statistical power, and pan from the lack of documentation ofthe performance of these techniques outside of extremely strong and highly specific associations (such as VCM and angiosarcoma of the liver).

Time Weighted Average (TWA) 1 ppm, OSHA Short Term Exposure Limit (STKI.) 5 ppm, ACGI1I 8 hr TWA 5 ppm Bill of leading Description aJfviVmylCMonde/5labilizedW2 I HUmmahU n limb KQ (Vinyl ChlorideV/Placardcd: Flammable Gas Emergency contact: 1-800-424-9300 Hazmat STCC = 4905792 /V.

Joe's participation in the Lead Industries Association, we should not yet push too hard for voluntary discontinuance, as such might stimulate plaintiffs' increased scrutiny of that aspect of their case.

DCBU is a lead ing North American manufacturer of electrical distribution equipment and industrial controls, headquartered in Pittsburgh.

(Must have two leads if its capacity is 250 KVA and above) 8.

CONFIDENTIAL Page 2 EPCRA Reporting Center July 24, 1997 CHEMICAL NAMBER ACETALDEHYDE ALLYL ALCOHOL AMMONIA ANTHRACENE ASBESTOS BARIUM BENZENE BIPHENYL BIS(2-CHL0R0-1 -METHYETH) CARBON DISULFIDE CARBON TETRACHLORIDE CHLORINE CHLOROBENZENE CHLORODIFLUOROMETHANE CHLOROETHANE CHLOROFORM CHLOROMETHANE CHROMIUM CRESOLS(P-ISOMER) CYANIDE COMPOUNDS CYCLOHEXANE DICHLOROBROMOETHANE DICHLORODIFLUOROMETHANE DICHLOROMETHANE DIETHANOLAMINE EPICHLOROHYDRJN ETHYLBENZENE ETHYLENE ETHYLENE GLYCOL ETHYLENE OXIDE ETHYLIDENE DICHLORIDE FLUORINE FORMALDEHYDE FORMIC ACID GLYCOL ETHERS HEXACHLORO-1,3-BUTADIENE HEXACHLOROBENZENE HEXACHLOROETHANE HEXANE (N-HEXANE) HYDROCHLORIC ACID ISOPROPYL ALCOHOL LEAD COMPOUNDS MERCURY METHANOL BROMOMETHANE METHYL ISOBUTYL KETONE REPORT YEAR 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 CAS NUMBER 000075070 000107186 007664417 000120127 001332214 N040 000071432 000092524 000108601 000075150 000056235 007782505 000108907 000075456 000075003 000067663 000074873 007440473 000106445 N106 000110827 000075274 000075718 000075092 000111422 000106898 000100414 000074851 000107211 000075218 000075343 007782414 000050000 000064186 N230 000087683 000118741 000067721 000110543 007647010 000067630 N420 007439976 000067561 000074839 000108101 DO A 054943 CONFIDENTIAL Page 3 EPCRA Reporting Center July 24,1 997 CHEMICAL NAMBER METHYL TERT BUTYL ETHER N-BUTYL ALCOHOL NAPHTHALENE NITRATE COMPOUNDS PHENOL PHOSPHORIC ACID PROPIONALDEHYDE PROPYLENE PROPYLENE OXIDE PYRIDINE SILVER COMPOUNDS STYRENE SULFURIC ACID TETRACHLOROETHYLENE TOLUENE TRICHLOROETHYLENE TRICHLOROFLUOROMETHANE VINYL CHLORIDE XYLENE(MIXED ISOMERS) REPORT YEAR 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 CAS NUMBER 001634044 000071363 000091203 N511 000108952 H3P04 000123386 000115071 000075569 000110861 N740 000100425 007664939 000127184 000108883 000079016 000075694 000075014 001330207 The hard copies of the Form R's are provided in alphabetic order.

The emphasis on preventive medicine was one source, but pres sure also came from the insurance bureaucracy, whose administra tors worried that tobaccogenic illnesses could lead to financial drains on the health insurance system.

All the actions identified to reduce or eliminate PVC utise were substitutes, the costs of which were used to provide the first estimate of the appropriate input tax schedule that would lead to virtual elimination.

Therefore, aside from profit or lees froe th* Bast Helena operation, the only situation direetly affected by a decision as to afoother Bast Helens slag troatsant is resumed or not shea lead sseltlag operations are recused, is th* natter ef rate ef depletion of our siae sonoeatrato supply.

Conceptual Approach (Mike/Andrew) Define Path Forward (Ah) E ID 911358 GZ0Z00H SV To review the required scope and schedule for RFI activities IZ 0ZQOHSV EID911359 CUSSION TOPICS List of SWMUs to be addressed in RFI Current conditions and VI results RFI workplan technical approach and schedule f 2Z0Z00HSV EID911360 I 30-DA Y RESPONSE EC050GHSV EID911361 CURRENT CONDITIONS SUMMARY WOE00HSV EID911362 GEOLOGY & HYDROGEOLOGY \ sso zo o h sv E ID 911363 Simple stratigraphy--Ohio River Terrace Deposits >Fine grained soils near surface and along riverbank Sand and gravel primary site geologic unit and aquifer Overlies Permian age bedrock (shale/ss) 9OK00HSV EID911364 ROGEOLOGY Flow direction controlled by groundwater pumping centers Pumping induces recharge--flow into site from river East Well Field 2000 gpm Ranney Well 800-1000 gpm Lubeck 500-700 gpm 30200HSV EID911365 WASHINGTON WORKS VI RESULTS KEY CONSTITUENTS DETECTED IN GROUNDWATER (by SWMU) Concentration Range (mg/1) RIVERBANK LANDFILL Freon 113 G-8 Tetrachloroethylene Chloroform Arsenic Mercury .081-3.1 .052-7,1 .019-.22 .005-.006 .007-.38 .0005-.028 ANAEROBIC DIGESTION PONDS Freon 113 Methylene Chloride C-8 Barium Lead .015-4.0 ,26-.29 .025-38.0 2.9-3.8 .13-36 BURNING GROUND Carbon Tetrachloride Tetrachloroethylene Trichloroethylene Freon 113 .009-036 .011-.025 027-.32 .Q27-.039 ASH002028 E ID 911366 RFI WORKPLAN TECHNICAL APPROACH t i 620Z00HSV EID91X367 TECHNICAL APPROACH Fully understand hydrogeologic system (i.e., confirm gw capture) Identify key data needs (hydro. & analytical) Meet applicable EPA standard RFI requirements Refine Site Conceptual Model (SCM) 0EGC0OHSV 'E CONCEPTUAL MODEL Present hypothesis to confirm or refute current understanding Supports risk-based decision making i Aids in identifying potential remedial alternatives Focuses RFI activities I lEOZQOHSV E ID 911369 K-BASED DECISION KING Screen VI data against Region III residential RBCs to identify applicable analytical list Development of site-specific RBCs eeozooHsv EID911370 WORKPLAN CHNICAL APPROACH STEP 1-Identify initial data needs (included in workplan) STEP 2-Construct groundwater flow model to fully define hydrogeologic system (identify additional data needs) STEP 3-Refine site conceptual model to confirm or identify final data needs STEP 4-Submit tech, memo to EPA with final RFI data collection points :* STEP 5-Field implementation tCOZOOHSV EID911371 WORKPLAN TABLE OF 'NTENTS Introduction Current Conditions (SWMUs, Geo/Hydro, SCM) RFI Technical Approach Report Preparation References K 0Z00H SV EID911372 WORKPLANENDICES Proj.

Experience has concluded that purification generally leads to a reduction in the concentration of higher and lower molecular weight homologues, as well as, potentially, a change in the relative composition of the isomers.

. ----------------- use common sense...................... 3.2 If the plant will be down for an extended period of time the oxide line will have to be isolated, nitrogen purged, nitrogen padded and red tagged. 4.0 Procedure: 4.1 Lead senior operations specialist actions: Data Printed: April 18, 1998 Page 1 Of 3 Paper copies of this document are Uncontrolled & Not Subject To Update.

(Soaafic CDamiol Idemily: Common Namota CARBON BLACK CAS01333-86-4 TRIBASIC LEAD SULFATE CAS012202-17-4 OSHA PEL ACGM TLV 3.5MG/M* . 15MG/M* Other Umns Recammenaafl % ioex, v 4 Section III -- Physlcai/Chemlcal Characteristics SbiubiJiry m Water N/A N/A " ^ N/A N/A Specific Gravey (HjO 1) Matog Point eapDtaunn Nate TBD N/A N/A SOLID PLASTIC , .

Asbestos dust was identified as a pulmonary irritant in the 1930s, and by the 1960s, was widely ac cepted to be a leading cause of lung scarring and lung cancer in workers closely and regularly exposed to it.