îlJUiri 572^ STOPPING WATER POLLUTION AT ITS SOURCE Ê^m^m^*^^ MISA Municipal/lndusfrlai Strategy for Abatement ACUTE LETHALITY DATA FOR ONTARIO'S INORGANIC CHEMICAL SECTOR EFFLUENTS Covering the Period from June 1990 to November 1990 Ontario ISBN 0-lll^-Q9%l-l ACUTE LETHALITY DATA FOR ONTARIO'S INORGANIC CHENHCAL MANTTACTURING SECTOR EFFLUENTS COVERING THE PERIOD FROM JUNE 1990 TO NOVEMBER 1990 OCTOBER 1993 Cette publication technique n'est disponible qu'en anglais. Copyright: Queen's Printer for Ontario, 1993 This publication may be reproduced for non-commercial purposes with appropriate attribution. PIBS 2728 ACUTE LETHALITY DATA FOR ONTARIO'S INORGANIC CHEMICAL SECTOR EFFLUENTS - COVERING THE PERIOD FROM JUNE 1990 TO NOVEMBER 1990 Report prepared by: J.T. Lee, M.C. Mueller, D.G. Poirier, G.F. Westlake Aquatic Toxicity Unit Water Resources Branch Ministry of Environment and Energy Contents page Introduction jjj Background iji Discussion jv Conclusions vi Appendix x Albright and Wilson Americas Inc., Port Maitland 1 Cabot Canada Ltd., Sarnia 5 Cyanamid Canada Inc. (Niagara plant), Niagara Falls 7 Cyanamid Canada Inc. (Welland plant), Niagara Falls 11 Exolon-Esk Company of Canada Ltd., Thorold 15 Explosive Technologies Int. Ltd., North Bay 17 Fiberglas Canada Inc., Sarnia 19 General Chemical Canada Ltd., Amherstburg 21 ICI Canada Inc., Cornwall 26 ICI Canada Inc., Courtright 28 International Minerals & Chemicals, Port Maitland 30 Liquid Carbonic Inc., Courtright 32 Liquid Carbonic Inc., Maitland 35 Nitrochem Inc., Maitland 37 Norton Canada Inc., Niagara Falls 39 Partek Insulations Ltd., Sarnia 43 Puritan-Bennett Canada Ltd., Maitland 45 Stanchem, Cornwall 47 Suico Chemicals Ltd., Elmira 49 UCAR Carbon Canada Ltd., Welland 51 Union Carbide Canada Ltd., Moore TWP 55 Union Carbide Canada Ltd., Sarnia 57 Union Carbide Canada Ltd., Sault Ste. Marie 59 Washington Mills Electro Minerals, Niagara Falls 61 Washington Mills Ltd., Niagara Falls 65 Welland Chemicals Ltd., Sarnia 67 Introduction Under the MISA program, the Inorganic Chemical Sector was required to monitor its discharges (both process and cooling waters) for acute lethality to trout and to Daphnia magna by conducting laboratory toxicity tests. Specific details on the toxicity testing requirements may be found in the General Effluent Monitoring Regulation (Ontario Regulation 695/88) and the Effluent Monitoring Regulation For The Inorganic Chemical Sector (Ontario Regulation 395/89). For the purposes of the Monitoring Regulation, the Inorganic Chemical Sector is defined to include all direct discharging plants, primarily engaged in the processing, manufacturing, packaging or blending of inorganic materials. The majority of the plants are located in southern Ontario. The products of the Inorganic industry include acids and bases, caustic soda, soda ash, fertilizers, explosives, carbon black, detergent additives, bleaches and industrial gases. Some of these are used as ingredients to manufacture other commercial products such as dyes, plastics and pharmaceutical. An overview of the sector is described in the publication 'The Development Document For The Effluent Monitoring Regulation For The Inorganic Chemical Sector, Env. Ontario July 1989". Toxicity information collected under the MISA effluent monitoring program will form the most comprehensive database available on the Inorganic Chemical Sector and will be used toward the development of compliance limits for acute toxicity. This report presents the toxicity results of the second six months of self-monitoring, from June 1, 1990 to November 30, 1990, along with the results of Ministry inspection samples that were tested at the Ministry's laboratory in Rexdale. Toxicity tests of some intake waters were also submitted by industry and these have been included in this report. The results of toxicity testing for the first six months of industry monitoring were reported in " Acute Lethality Data For Ontario's Inorganic Chemical Sector Effluents Covering The Period From December 1989 To May 1990, Env. Ontario 1992 ". Although this report is focused on the second six months of monitoring, the Conclusion section does provide a brief overview on the complete year of monitoring. Background in general, toxicity tests are used as a rapid technique to assess the potential impact of complex effluents on the aquatic environment. The tests have been designed to answer whether or not an effluent produces an effect on a biological system and the degree of the measured effect. In acute lethality testing, aquatic organisms are exposed to undiluted effluent, and several effluent dilutions, for a fixed period of time. The toxicity test protocols require a 98 hour exposure for trout and a 48 hour exposure for Daphnia. For both tests, the number of organisms which have died is the measured parameter. The LC50 or the estimated concentration of effluent that causes 50 % mortality is generally used as the quantitative measure of toxicity. For complex waste water samples, the LC50 measurement is usually expressed as a percentage of effluent volume. For example, a 96 o c ii- OS o D) ■5 o o E o c SI O O o a> ° 5 2 5 c < D -^ ^ Oi "CI 0:2 ^ O 2 O < " = o 3 .-t; tji (/) E 2 2 2 §o o i2 en D >^ 0) (J -^ tn £=25 3^^c^o,^— o_cn o c o .^ ë E .?> "O — — o o -. 't) £ o "D O o Li. 1— 0) en " E n o E O 1 c > 'en l2 our o-e -e c ^ o o t Ô a O a? (n O > a> q; 0) O) ^ 3 c -1-1 -n T-i -n •*= -*^ V _o c o •- "2 ."S ."9 S -O T3 o "î 2 " oc 2 2 o O-ii^ï.ticSoôo c en "O c r c n in en ^ < 3 o ■- Csi f^ ^ ir>0'- cMro hour LC50 = 35 % can be explained as the percent by volume of effluent required to kill 50 % of the test fish within a 96 hour exposure period. LC50 percentages are inversely related to the degree of toxicity; lower numbers representing greater effect. Effluent samples where no animals die in full strength (100 % ) effluent or in any of the diluted concentrations are considered non-lethal. Non-lethal effluents are considered less likely to produce adverse impacts in the environment after dilution. For bioassays where less than half the test animals die in full strength effluent, and the data does not support the calculation of an LC50, the acute lethality is usually reported as "LC50 > 100 % ". This designation indicates that mortalities occurred during the test, but the LC50 cannot be accurately calculated from the data and is probably greater than full strength effluent. As directed by the Effluent Monitoring Regulation, the Inorganic Chemical Sector was required to collect and provide information on its operations including analytical chemical characterization and toxicity analysis of its waste water discharges. The timing of toxicity sampling was arranged as much as possible to coincide with chemical characterization. The frequency of sampling was monthly for both toxicity test procedures on process effluents with the exception that if trout tests showed insignificant mortalities over three consecutive months then in subsequent months a single concentration trout test may be used. For cooling water effluent, the required frequency of sampling and testing was quarterly. All acute lethality testing by the Sector plants were conducted according to Ministry protocols (Protocol To Determine The Acute Lethality Of Liquid Effluents To Fish, Env. Ontario, July 1983 and Daphnia magna Acute Lethality Toxicity Test Protocol, Env.Ontario, April 1988). The regulations also required specific information on sampling and testing procedures for each bioassay, in addition to the mortality data. All data was reported in an electronic and hardcopy report. The Ministry's TOXDATA computer program was provided to industry as a method of managing toxicity data and as a route for data submission. Additional information on this computer program is provided in the publication titled " Toxicity Relational Database System TOXDATA User's Manual, Env. Ontario, May 1989". Discussion General The Inorganic Chemical Sector plants submitted data for 42 sampling locations at a total of 26 plants for the second six months of monitoring. Starting in June 1990 and ending November 1990, a total of 388 trout and Daphnia toxicity test results were submitted by the plants. An additional 40 inspection tests were conducted by the Aquatic Toxicity Unit of Environment Ontario. Liquid Carbonic Inc. (Courtright), Liquid Carbonic Inc. (Maitland), Puritan Bennett Canada Ltd. (Maitland), Union Carbide Canada Ltd. (Moore Twnshp), Union Carbide Canada Ltd. (Sarnia), and Union Carbide Canada Ltd. (Sault Ste. Marie) were all brought under monitoring through regulation amendments after initial promulgation date. Therefore, acute toxicity data submitted beyond November 1990, for these plants, have been included in this report. Three companies, Allied Chemicals Canada Inc., Canadian Liquid Air Ltd., and Columbian Chemicals were not required to monitor for acute toxicity during the Monitoring Regulation period. These plants were considered exempt from acute toxicity monitoring since they did not discharge process effluent directly into the natural environment. Albright and Wilson Americas Inc. and General Chemical Canada Ltd. voluntarily submitted test results for acute toxicity tests conducted on intake water samples. The data collected during this six months of monitoring indicated that the majority of the inorganic chemical sector's effluents were not acutely lethal. Over 88 % of the samples tested for trout acute lethality and 77 % of the samples tested for Daphnia acute lethality were non-lethal or had insignificant mortalities (LC50s > 100 % effluent). Most of the samples that were acutely lethal to trout and/or Daphnia originated from sites at the following seven plants: Cyanamid Canada lnc.(Welland plant). General Chemical Canada Ltd., Nitrochem Inc., Partek Insulations Ltd., Puritan-Bennett Canada Ltd., Union Carbide Canada Ltd.(Sarnia plant), and Welland Chemical Ltd. All these plants reported that one or more of their discharges were acutely lethal to Daphnia and/or trout, at least 50 % of the time when sampled. Trout Test Results Of the 193 samples that were tested for acute toxicity to trout, 144 (74.6 %) were not acutely lethal. The effluent samples collected from 7 of the 26 plants were consistently not acutely lethal. Companies included in the non-lethal effluent category were : Exolon-Esk Company of Canada Ltd., Explosive Technologies Int. Ltd., ICI Canada Inc.(Courtright), International Minerals & Chemicals, Suico Chemicals Ltd., Washington Mills Electro Minerals and Washington Mills Ltd. An additional 27 samples, 1 1 .4 % of total, resulted in LC50S > 100 %. Many of these tests had only one fish die during the test and may be interpreted as being not acutely lethal. Nine plants submitted data that showed their effluent samples were either non-lethal or had LC50s > 100 % throughout this six month period. This category included the following companies : Albright and Wilson Americas Inc., Cabot Canada Ltd., Fiberglas Canada Inc., Liquid Carbonic lnc.(Maitland plant), Stanchem, UCAR Carbon Canada Ltd., Union Carbide Canada Ltd. (Moore Twp), Union Carbide Canada Ltd.(Sarnia), and Union Carbide Canada Ltd.(Sault Ste. Marie). Twenty-two samples, 11.4 % of the total number of samples tested, were acutely-lethal to trout (96 hour LC50 <100 %). All of the acutely lethal results were submitted by the following ten plants :Cyanamid Canada Inc. (Niagara Falls plant), Cyanamid Canada lnc.(Welland plant). General Chemical Canada Ltd., ICI Canada Inc. (Cornwall), Liquid Carbonic Inc.(Courtright), Nitrochem Inc., Norton Canada Inc., Partek Insulations Ltd., Puritan-Bennett Canada Ltd., and Welland Chemical Ltd. Daphnia magna Test Results Of the 195 samples tested for acute toxicity to Daphnia magna, 116 samples (59.5 %) were not acutely lethal. The effluent samples from three plants, Exolon-Esk Company of Canada Ltd., Explosive Technologies int. Ltd., and ICI Canada Inc.(Courtright) were consistently not acutely lethal to Daphnia throughout the second six months of monitoring. An additional 35 samples (17.9 %) had 48 hour LC50s >1(X) %. Many of these samples had only one neonate die during the test, and might be interpreted as being not acutely lethal. Seven plants have one or more test results with an LC50 > 100 %. Included in this category were : Cyanamid Canada Inc. (Niagara plant). Liquid Carbonic Inc.(Maitland), Norton Canada Inc., Suico Chemicals Inc., UCAR Carbon Canada inc., Washington Mills Electro Minerals and Washington Mills Ltd. Forty-four samples (22.6 %) were acutely lethal to Daphnia (48 hour LC50s < 100 %). The following sixteen plants reported that during this second six months of monitoring, one or more of their effluent samples was acutely lethal to Daphnia: Albright and Wilson Americas Inc., Cabot Canada Ltd., Cyanamid Canada lnc.(Welland plant), Fiberglas Canada Inc., General Chemical Canada Ltd., ICI Canada Inc. (Cornwall plant), International Minerals and Chemicals, Liquid Carbonic lnc.(Courtright plant), Nitrochem Inc., Partek Insulations Ltd., Puritan-Bennett Canada Ltd., Stanchem, Union Carbide Canada Ltd. (Moore Twp plant). Union Carbide Canada Ltd.(Sarnia plant), Union Carbide Canada Ltd.(Sault Ste. Marie), and Welland Chemical Ltd. Conclusions In general, the reporting of toxicity data by the industries went smoothly. The data was usually submitted accurately and according to schedule. Where the Ministry requested industry for data resubmission to correct data entry errors and/or for additional information, the companies complied. Where Ministry audit samples were collected and tested, the results were consistent with results submitted by industry. The full year of MISA acute toxicity data for the Inorganic Chemical Sector indicated that the majority of inorganic chemical plant effluent samples were not acutely lethal. Although the majority of the samples were non-lethal, only a few companies could report that their effluents were non-lethal every time when tested. Only four of the twenty-six plants which submitted acute trout toxicity data had non-lethal effluents throughout the full year of monitoring. None of the plants were able to report their effluents were consistently non- lethal to Daphnia throughout the year. Overall, the effluents were more toxic to Daphnia than to rainbow trout. For the second six months of monitoring, twice as many plants reported Daphnia toxicity as did trout toxicity. Over the full year, eight plants; Cyanamid Canada lnc.(Welland plant), General Chemical Canada Ltd., ICI Canada Inc., Nitrochem Inc., Partek Insulations Ltd., Puritan-Bennett vi Canada Ltd., Union Carbide Canada Ltd.(Sarnia) and Weiland Chemical Ltd. were in the category where at least 50 % of the samples collected from a discharge were lethal to Daphnia and/or trout. For several of the toxic samples, a quick review of the matching analytical chemistry monitoring data has revealed some probable causes of the observed acute toxicity. Where this was possible, a brief explanation to the probable causes of toxicity are described below. The toxicity tests will detect harmful concentrations of chemical constituents in the effluents. Compliance with "end of pipe" limits for acute toxicity does not necessarily control the potential effects of environmental contamination that can be caused by loading of bioaccumulative substances. These substances are generally non- polar organic chemicals of high molecular weight and low water solubility or metals that can be accumulated in their organic form. For this industrial sector, several of these contaminants have been measured in some effluents at sublethal concentrations. This list includes dioxins, octachlorostyrene, hexachlorobenzene, lead, cadmium and mercury. Cyanamid Canada inc., (Weiland plant), Niagara Falls Cyanamid Canada Inc. manufactures inorganic nitrogen and phosphorous products and discharges the wastewater into the Niagara River via Thompson's Creek and the Weiland River. The Miller Creek discharge, during the second six months of monitoring , was consistently lethal to Daphnia and occasionally to trout. It is unclear at present to the causes of lethality. Cyanamid Canada Inc. has undertaken a study to evaluate all sources of toxicity at this site. General Chemical Canada Ltd., Amherstburg General Chemical Canada Ltd. produces soda ash (sodium carbonate) from common salt and the wastewater from the plant is discharged into the Detroit River via the Main Drain and North Drain. The North Drain is also used to discharge wastewater from the Genetron and Hydrofluoric acid plants operated by Allied Chemicals Canada Inc. The effluent samples from the Main Drain were consistently non-lethal to Daphnia magna and trout while the North Drain effluent samples were consistently acutely lethal to both species. For the year of monitoring, the trout bioassay LC50s ranged from 20 % to 40 % effluent, while all the Daphnia LC50s were reported as less than 10 % effluent. The alkaline condition of the North Drain wastewater could alone account for the lethal response reported in the bioassays. The pH measurements for the North Drain effluent were consistently above 11 .5 on days when toxicity samples were collected. Usually water with a pH greater than 10.5 would be acutely lethal to both Daphnia and trout. General Chemical's effluent also contained very high concentrations of chloride ions, as much as 47,900 ppm. Chlorides are found in practically all natural waters and are not usually considered a hazardous contaminant. However, the amount of chloride discharged at this vii site are well above levels which would kill fish and would have contributed to the lethality observed in the bioassays. Nitrochem Inc., Maitland Nitrochem Inc. manufactures ammonia, nitric acid, ammonium nitrate and other nitrogen solutions. Nitrochem's wastewater is discharged directly into the St. Lawrence River. The final effluent was consistently acutely lethal to Daphnia magna and trout throughout the year of monitoring. Un-ionized ammonia (NH3) concentrations in the discharge 0400 were above 50 ppm for several of the days when samples were lethal and would have contributed to the acute toxicity. Cyanide concentrations (12 month average 321 ppb) measured in the 0400 discharge may have also contributed to the observed toxicity. Partek Insulations Ltd., Sarnia Partek Insulations Ltd. manufactures insulation fibre and discharges its wastewater into the St.Clair River. The effluent samples collected from the C Water Overflow were consistently acutely lethal to Daphnia and trout. The cooling water overflow effluent is straight-through non-contact city water and the probable cause of lethality is the chlorine present in the supply. Union Carbide Canada Ltd., Sarnia Union Carbide Canada Ltd. manufactures nitrogen gas and discharges its wastewater into the St. Clair River. The effluent samples collected from the Cole Drain were consistently lethal to Daphnia magna and only lethal to trout in one test throughout the year of monitoring. For several of the samples, the copper (12 month average 134 ppb) and zinc (12 month average 454 ppb) concentrations exceeded levels known to be acutely lethal and could have contributed to the lethality observed in the bioassays. Welland Chemicals Ltd., Sarnia Welland Chemicals Ltd. manufactures anhydrous aluminum chloride, sodium hypochlorite, and packages chlorine gas. The plant's wastewater is discharged through several sewers into the St.Clair River via the Talford Creek. The effluent samples collected from the South Lagoon discharge point were consistently lethal to Daphnia and trout throughout the year of monitoring. It is suspected the high levels of aluminum (12 month average 3710 ppb), and cadmium (12 month average 4.2 ppb) discharged in this effluent could have contributed to the acute lethality observed in the bioassays. VIII The data in the Appendix, presents the summaries of the acute lethality results, grouped by company in alphabetic order. These summary pages are part of the complete database, that includes the Toxicity Test Report submitted by industry for each test sample. The complete database is available from Environment Ontario upon request. The results of Ministry inspection tests are also presented in the individual summaries. The comment fields on individual Toxicity Test Reports were entered by the industry's laboratory performing the tests, and may not to be consistent across samples and may not necessarily represent the views of the Ministry. IX Appendix COMPANY: Albright and Wilson Americas Inc. , Port Maitland (1810001) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for six trout bioassays, conducted on final discharge effluent samples collected between June 1990 and Novemeber 1990, were provided by Albright and Wilson Americas Incorporated. Three of the six effluents samples were not acutely lethal to test fish. The other three samples had 96 hour LC50s > 100 % effluent. Final Discharge 06900738 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06900915 sampled: 07/11/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 10% MORTALITY IN 100% TEST CONCENTRATION. 06901159 sampled: 08/15/90 non-lethal 95% fid. aimits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901418 sampled: 09/12/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 4 0% MORTALITY IN 100% TEST CONCENTRATION. 06901632 sampled: 10/09/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901896 sampled: 11/14/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 3 0% MORTALITY IN THE 100% CONCENTRATION Intake Water 06900740 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06900917 sampled: 07/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901161 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OF SUBLETHAL IMPAIRMENT OBSERVED Albright and Wilson Americas Inc. (continued) 06901416 sampled: 09/12/90 LC50: 87.3 % 95% fid. limits: 65.0 - 100.0 % comments: 80% MORTALITY IN 100% TEST CONCENTRATION. 06901630 sampled: 10/09/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901898 sampled: 11/14/90 LC50: 80.6 % 95% fid. limits: 65.0 - 100.0 % comments: 100% MORTALITY IN THE 100% CONCENTRATION COMPANY: Albright and Wilson Americas Inc., Port Maitland (1810001) SECTOR: Inorganic Chemical REGION: West Central SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Final Discharge (0100) were submitted by Albright and Wilson Americas Inc. of Port Maitland. Five of six samples of Final Discharge were not acutely lethal to Daphnia. The November sample was acutely lethal to Daphnia and had a LC50 of 77.9 %. Final Discharge 06900739 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06900916 sampled: 07/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901160 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901419 sampled: 09/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901633 sampled: 10/09/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901897 sampled: 11/14/90 LC50: 77.9 % 95% fid. limits: 72.9 - 83.1 % comments: 10% MORTALITY IN THE 65% CONCENTRATION Intake Water 06900741 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06900918 sampled: 07/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901162 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS Albright and Wilson Americas Inc. (continued) 06901417 sampled: 09/12/90 LC50: 80.6 % 95% fid. limits: 65.0 - 100.0 % comments: 100% MORTALITY IN 100% TEST CONCENTRATION. 06901631 sampled: 10/09/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901899 sampled: 11/14/90 LC50: 57 . % 95% fid. limits: 50.0 - 65.0 % comments: 100% MORTALITY IN THE 65% CONCENTRATION COMPANY: Cabot Canada Ltd., Sarnia (4260006) SECTOR: Inorganic Chemical REGION : Southwest SUMMARY The data for six trout bioassays, conducted on control point #100 discharge samples collected between June 1990 and November 1990, were provided by Cabot Canada Ltd. Four of the six samples were not acutely lethal to the test fish. The other two samples had 9 6 hour LC50s > 100 % effluent. Discharge 05900133 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900154 sampled: 07/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : . 05900170 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 01900181 sampled: 08/22/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 05900194 sampled: 09/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900204 sampled: 10/10/90 LC50: >100 95% fid. limits: 0.0 - 0.0 % comments: 05900213 sampled: 11/14/90 LC50: >100 95% fid. limits: 0.0 - 0.0 % comments : COMPANY : Cabot Canada Ltd . , (4260006) SECTOR: Inorganic Chemical REGION: Southwest Sarnia SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Discharge Effluent (0100) were submitted by Cabot Canada Ltd. of Sarnia. One of the six samples was acutely lethal to Daphnia and had a LC50 of 79.0 %. Three of the remaining samples were non-lethal and the other two had LC50s of > 100 % effluent. A sample collected and tested by the Ministry in August was acutely lethal with a LC50 of 56.6 %. Discharge 05900133 sampled: 06/13/90 95% fid. limits: 0.0 - comments: non-lethal 0.0 % 05900154 sampled: 07/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900170 sampled: 08/08/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 02900182 sampled: 08/21/90 LC50: 56.6 % 95% fid. limits: 44.1 - 69.4 % slope: 6.9 comments: MISA Audit 05900194 sampled: 09/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900204 sampled: 10/10/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 05900213 sampled: 11/14/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : 79.0 COMPANY: Cyanamid Canada Inc. (Niagara plant) , Niagara Falls (1550003) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for 18 trout bioassays, conducted on samples of Hydro Canal effluent, cooling pond overflow, and south fork sewer effluent collected between June 199 and November 1990, were provided by Cyanamid Canada Incorporated. All the samples collected from the Hydro. Canal were non-lethal. Five of the six samples from the South Fork Sewer were non-lethal and the remaining had a LC50 of > 100 %. Five of six Cooling Pond Overflow samples were non-lethal. The July sample was acutely lethal to fish with a LC50 of 78.6 %. Whitty Creek Final Effl Effluent to Hydro Canal 03900499 sampled: 06/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900602 sampled: 07/17/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900715 sampled: 08/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900830 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900908 sampled: 10/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non Lethal; single concentration test 03901028 sampled: 11/27/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non^lethal cooling pond overflow 03900501 sampled: 06/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal Cyanamid Canada Inc. (Niagara plant) (continued) 03900600 sampled: 07/17/90 LC50: 78.6 95% fid. limits; comments :~ 57.2 - 108.0 % slope; 3.6 03Ô00716 sampled: 08/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900829 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900909 sampled: 10/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non Lethal 03901029 sampled: 11/27/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal south fork sewer 03900500 sampled: 06/19/90 95% fid. limits: 0.0 - comments: Non-lethal 03900601 sampled: 07/17/90 95% fid. limits: 0.0 - comments: Non lethal 03900714 sampled: 08/21/90 95% fid. limits: 0.0 - non-lethal 0.0 % non-lethal 0.0 % LC50: 0.0 % >100 comments: Single Cone. Test; 5% mort. @100% effl. cone. 03900828 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration test; non-lethal 03900910 sampled: 10/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non Lethal; single concentration test 03901030 sampled: 11/27/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal COMPANY : SECTOR: REGION : Cyanamid Canada Inc. (Niagara plant) , Niagara Falls (1550003) Inorganic Chemical West Central SUMMARY Results from eighteen Daphnia magna acute lethality toxicity tests conducted on samples from three separate outfalls were submitted by Cyanamid Canada Inc. (Niagara Plant) of Niagara Falls. Five of six samples from Effluent to Hydro Canal were not acutely lethal to Daphnia, and the remaining sample had 48 h LC50 > 100%. Five of the six cooling pond overflow samples were not acutely lethal to Daphnia and the remaining sample had a LC50 of > 100 %. Four of the six South fork sewer samples were not acutely lethal to Daphnia and the remaining samples had a LC50 of > 100 % effluent. Whitty Creek Final Effl Effluent to Hydro Canal 03900499 sampled: 06/19/90 95% fid. limits: 0.0 - comments: Non-lethal non-lethal 0.0 % 03900602 sampled: 07/17/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900715 sampled: 08/21/90 LC50; 95% fid. limits: 0.0 - 0,0 % comments: LC50 >10 >100 03900830 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900908 sampled: 10/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03901028 sampled: 11/27/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal Cyanainid Canada Inc. (Niagara plant) (continued) cooling pond overflow 03900501 sampled: 06/19/90 95% fid. limits: 0.0 - comments: LC50 >100 03900600 sampled: 07/17/90 95% fid. limits: 0.0 - comments: Non lethal 03900716 sampled: 08/21/90 95% fid. limits: 0.0 - comments: Non-lethal 03900829 sampled: 09/19/90 95% fid. limits: 0.0 - comments: Non-lethal 03900909 sampled: 10/16/90 95% fid. limits: 0.0 - comments: Non-lethal 03901029 sampled: 11/27/90 95% fid. limits: 0.0 - comments: Non-lethal south fork sewer 03900500 sampled: 06/19/90 95% fid. limits: 0.0 - comments: Non-lethal 03900601 sampled: 07/17/90 95% fid. limits: 0.0 - comments: LC50 >100 03900714 sampled: 08/21/90 95% fid. limits: 0.0 - comments: LC50 >100 03900828 sampled: 09/19/90 95% fid. limits: 0.0 - comments: Non-lethal 03900910 sampled: 10/16/90 95% fid. limits: 0.0 - comments: Non-lethal 039010:^0 sampled: 11/27/90 95% fid. limits: 0.0 - comments: Non-lethal LC50: 0.0 % >100 non-lethal 0.0 % non-lethal 0.0 % non-lethal 0.0 % non-lethal 0.0 % non-lethal 0.0 % non-lethal 0.0 % LC50: 0.0 % LC50; 0.0 % >100 >100 non-lethal 0.0 % non-lethal 0.0 % non-lethal 0.0 % 10 COMPANY: Cyanamid Canada Inc. (Welland plant) , Niagara Falls (1550102) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for ten trout bioassays, conducted on Miller's Creek effluent and Dicy cooling water effluent samples collected between June 1990 and November 1990, were provided by Cyanamid Canada Incorporated. Five of six Miller's Creek samples were non-lethal to test fish. The other sample was lethal with a LC50 of 90.6 %. Also a sample collected and tested by the Ministry in September was acutely lethal and had a 96 hour LC50 of 70.8 %. All three Dicy cooling water samples were non-lethal. Millers Cr 06900771 sampled: 06/18/90 LC50: 90.6 % 95% fid. limits: 0.0 - 0.0 % comments: CONFIDENCE LIMITS CAN NOT BE CALCULATED. 06900945 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901231 sampled: 08/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIPilENT OBSERVED 01900194 sampled: 09/1.0/90 LC50: 70.8 % 95% fid. limits: 61.7 - 81.2 % comments: MISA Audit 06901443 sampled: 09/17/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901665 sampled: 10/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901921 sampled: 11/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 11 Cyanamid Canada Inc. (Welland plant) (continued) cooling water process effluent Dicy Cooling Water 06900947 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901667 sampled: 10/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901923 sampled: 11/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 12 COMPANY: Cyanaitiid Canada Inc. (Welland plant) , Niagara Falls (1550102) SECTOR: Inorganic Chemical REGION: West Central SUMMARY Results from ten Daphnia magna acute lethality toxicity tests conducted on samples from Millers Creek (0100) , and Dicy Cooling Water (01300) were submitted by Cyanamid Canada Inc. (Welland Plant) of Niagara Falls. Seven of eight samples from Millers Creek were acutely lethal to Daphnia, with 48 h LC50 values ranging from 24.5% to 9 0.6 %. The two samples of Dicy Cooling Water were not acutely lethal to Daphnia . Millers Cr 06900771 sampled: 06/18/90 LC50: 90.6 % 95% fid. limits: 0.0 - 0.0 % comments: CONFIDENCE LIMITS CAN NOT BE CALCULATED 06900772 sampled: 06/18/90 LC50: 24.5 % 95% fid. limits: 20.0 - 30.0 % comments: 100% MORTALITY IN THE 3 0% CONCENTRATION 06900944 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901232 sampled: 08/20/90 LC50: 79.1 % 95% fid. limits: 66.6 - 103.1 % slope: 7.5 comments: 80% MORTALITY IN 100% TEST CONCENTRATION. 02900194 sampled: 09/10/90 LC50: 5.0 - 15.0 ' 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit 06901444. sampled: 09/17/90 LC50: 77.9 % 95% fid. limits: 72.9 - 83.2 % comments: 100% MORTALITY IN 100% TEST CONCENTRATION. 06901666 sampled: 10/15/90 LC50: 72.7 % 95% fid. limits: 65.7 - 80.3 % comments: 3 0% MORTALITY IN 65% TEST CONCENTRATION. 06901922 sampled: 11/19/90 LC50: 77.9 % 95% fid. limits: 72.9 - 83.1 % comments: 10% MORTALITY IN THE 65% CONCENTRATION 13 Cyanamid Canada Inc. (Welland plant) (continued) cooling water process effluent Dicy Cooling Water 06900948 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901924 sampled: 11/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED 14 COMPANY: Exolon-Esk Company of Canada Ltd., Thorold (1640002) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for six trout bioàssays, conducted on Beaver Dam Rd. Outfall effluent samples collected between June 1990 and November 1990, were provided by Exolon-Esk Company of Canada Limited. All six samples were not acutely lethal to test fish. A sample collected and tested by the Ministry in July had a 96 hour LC50 of > 100 %. Outfall Beaver-Dam Rd 03900470 sampled: 06/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 01900139 sampled: 07/09/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit 03900584 sampled: 07/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900688 sampled: 08/14/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900805 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900890 sampled: 10/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900986 sampled: 11/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single cone, test; non lethal 15 COMPANY: Exolon-Esk Company of Canada Ltd., Thorold (1640002) SECTOR: Inorganic Chemical REGION: West Central ' SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Outfall at Beaver Dam Road (0100) were submitted by Exolon-Esk Company of Canada Ltd. of Thorold. All six samples were non-lethal to Daphnia. A sample collected and tested by the Ministry in July had a LC50 of > 100 % effluent. Outfall Beaver-Dam Rd 03900470 sampled: 06/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 02900139 sampled: 07/09/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit >100 03900584 sampled: 07/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900688 sampled: 08/14/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900805 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900890 sampled: 10/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900986 sampled: 11/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 16 COMPANY: Explosive Technologies Int. Ltd., North Bay (80200) SECTOR: Inorganic Chemical REGION: Northeast SUMMARY The data for two trout bioassays, conducted on Weir Discharge effluent samples collected between June 1990 and November 1990, were provided by Explosive Technologies International Limited. Both samples were determined not acutely lethal to test fish. A sample collected and tested by the Ministry in November was non-lethal. Discharge at Weir 03900455 sampled: 06/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900824 sampled: 09/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 01900261 sampled: 11/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit 17 COMPANY: Explosive Technologies Int. (80200) SECTOR: Inorganic Chemical REGION: Northeast Ltd. , North Bay SUMMARY Results from two Daphnia magna acute lethality toxicity tests conducted on samples from Discharge at Weir (0100) were submitted by Explosive Technologies International Ltd. of North Bay. Both samples were not acutely lethal to Daphnia. A sample collected and tested by the Ministry in November was also non-lethal. Discharge at Weir 03900455 sampled: 06/06/90 95% fid. limits: 0.0 - comments: Non lethal non-lethal % 03900824 sampled: 09/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 02900261 sampled: 11/13/90 95% fid. limits: 0.0 - non-lethal 0.0 % comments: MISA Audit; Non-lethal 18 COMPANY: Fiberglas Canada Inc. , Sarnia (270306) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for six trout bioassays, conducted on main effluent samples collected between June 1990 and November 1990, were provided by Fiberglas Canada Incorporated. Five of the six samples were not acutely lethal. The remaining sample produced a 96 hour LC50 of > 100 % effluent. Main Effluent 03900466 sampled: 06/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900578 sampled: 07/09/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single concentration test; Non lethal 03900673 sampled: 08/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900793 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900891 sampled: 10/08/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: Single Cone. Test; 90% mort. @ 100% eff.con 03900980 sampled: 11/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : Non lethal 19 COMPANY: Fiberglas Canada Inc. (270306) SECTOR: Inorganic Chemical REGION: Southwest Sarnia SUMMARY Results for five Daphnia magna acute lethality toxicity tests conducted on samples of Main Effluent (0100) were submitted by Fibreglas Canada Inc. of Sarnia. Four of five samples were not acutely lethal to Daphnia. The October sample was acutely lethal to Daphnia, with an LC50 of 18.0 Main Effluent 03900466 sampled: 06/11/90 95% fid. limits: 0.0 - comments: Non lethal 03900673 sampled: 08/13/90 95% fid. limits: 0.0 - comments: Non-lethal non-lethal 0.0 % non-lethal 0.0 % 03900793 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900891 sampled: 10/08/90 LC50: 95% fid. limits: 13.0 - 25.0 % comments : 03900980 sampled: 11/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 18.0 20 COMPANY: General Chemical Canada Ltd., Amherstburg (10009) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for eleven trout bioassays, conducted on North Drain effluent and Main Drain effluent samples collected between June 1990 and November 1990, were provided by General Chemicals Canada Limited. All six samples of North Drain effluent were acutely lethal to the test fish. For these samples, the 96 Hour LC50s ranged from 22.6 % to 28.3 % effluent. Also a sample collected and tested by the Ministry in October was acutely lethal and had an LC50 of 14.1 %. Three of five Main Drain effluent samples were not acutely lethal to the test fish. The remaining two samples had LC50S of > 100 % effluent. A Main Drain effluent sample, collected and tested by the Ministry in October, was non-lethal. North Drain 03900479 sampled: 06/12/90 LC50: 28.3 % 95% fid. limits: 20.0 - 40.0 % comments: Lethal 03900587 sampled: 07/10/90 LC50: 22.6 % 95% fid. limits: 17.4 - 29.3 % slope: 5.5 comments : 03900690 sampled: 08/14/90 LC50: 25.3 % 95% fid. limits: 18.8 - 33.9 % slope: .5.5 comments : 03900804 sampled: 09/11/90 LC50: 28.3 % 95% fid. limits: 20.0 - 40.0 % comments : 03900896 sampled: 10/09/90 LC50: 28.3 % 95% fid. limits: 20.0 - 40.0 % comments : 01900226 sampled: 10/10/90 LC50: 14.1 % 95% fid. limits: 10.0 - 20.0 % comments: MISA Audit 03900988 sampled: 11/13/90 LC50: 25.3 % 95% fid. limits: 18.8 - 33.9 % slope: 5.5 comments : 21 General Chemical Canada Ltd. (continued) Main Drain 03900480 sampled: 06/12/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: Single cone, test - 5% mort. @ 100% eff. cone 03900585 sampled: 07/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900691 sampled: 08/14/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; 5% mort §100% effl 03900803 sampled: 09/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 01900225 sampled: 10/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 03900989 sampled: 11/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal Intake Water 03900481 sampled: 06/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single concentration test; Non lethal 03900586 sampled: 07/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900689 sampled: 08/14/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900802 sampled: 09/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900990 sampled: 11/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 22 COMPANY: General Chemical Canada Ltd. , Amherstburg (10009) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY Results for twelve Daphnia magna acute lethality toxicity tests conducted on samples from North Drain and Main Drain effluent were submitted by General Chemical Canada Ltd. of Amherstburg. All six samples from the North Drain (0100) were acutely lethal to Daphnia, with LC50s between 7.9 % and 8.8 %. Four of six samples from the Main Drain (0200) were not acutely lethal to Daphnia and the remaining two samples had LC50S > 100%. A sample collected by the Ministry from the Main Drain effluent in October was acutely lethal to Daphnia and had a LC50 of 18.8 %. A sample collected by the Ministry from the North Drain effluent in October was acutely lethal and had a LC50 of 5.0 - 15.0 %. North Drain 03900479 sampled: 06/12/90 LC50: 8.8 % 95% fid. limits: 6.0 - 13.0 % comments : 03900587 sampled: 07/10/90 LC50: 7.9 % 95% fid. limits: 5.9 - 10.4 % slope: 5.5 comments : 03900690 sampled: 08/14/90 LC50: 8.5 % 95% fid. limits: 6.9 - 10.3 % slope: 9.3 comments : 03900804 sampled: 09/11/90 LC50: 7.9 % 95% fid. limits: 5.9 - 10.4 % slope: 5.5 comments: 03900896 sampled: 10/09/90 LC50: 8.8 % 95% fid. limits: 6.0 - 13.0 % comments : 02900226 sampled: 10/10/90 LC50: 5.0 - 15.0 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit\High conductivity & pH 03900988 sampled: 11/13/90 LC50: 8.8 % 95% fid. limits: 6.0 - 13.0 % comments : 23 General Chemical Canada Ltd. (continued) Main Drain 03900480 sampled: 06/12/90 95% fid. limits: 0.0 - comments: Non lethal 03900585 sampled: 07/10/90 95% fid. limits: 0.0 - comments: Non-lethal 03900691 sampled: 08/14/90 95% fid. limits: 0.0 - coinments: Non-lethal 03900803 sampled: 09/11/90 95% fid. limits: 0.0 - comments: LC50 >100 03900897 sampled: 10/09/90 95% fid. limits: 0.0 - comments: Non Lethal 02900225 sampled: 10/10/90 95% fid. limits: 13.9 - coinments: MISA Audit 03900989 sampled: 11/13/90 95% fid. limits: 0.0 - comments: LC50 >100 Intake Water 03900481 sampled: 06/12/90 95% fid. limits: 0.0 - comments: Non lethal 03900586 sampled: 07/10/90 95% fid. limits: 0.0 - comments: Non-lethal 03900689 sampled: 08/14/90 95% fid. limits: 0.0 - comments: LC50 >100 03900802 sampled: 09/11/90 95% fid. limits: 0.0 - comments: Non-lethal 03900898 sampled: 10/09/90 95% fid, limits: 0.0 - comments: Non Lethal non-lethal 0.0 % non-lethal 0.0 % non-lethal 0.0 % LC50: >100 0.0 % non-lethal 0.0 % LC50: 18.8 % 26.3 % LC50: >100 0.0 % non-lethal 0.0 % non-lethal 0.0 % LC50: >100 0.0 % non-lethal 0.0 % non-lethal 0.0 % 24 General Chemical Canada Ltd. (continued) 03900990 sampled: 11/13/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0-% comments: LC50 >100 25 COMPANY: ICI Canada Inc., Cornwall (390401) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY The data for four trout bioassays, conducted on LEL-2 effluent samples collected between June 1990 and November 1990, were provided by ICI Canada Inc. One of the four samples (collected in July) was acutely lethal to test fish and had a 96 hour LC50 of 84.5 %. The remaining three samples were non-lethal. A sample collected and tested by the Ministry in September had a LC50 of > 100 % effluent. Effluent in LEL-2 06900673 sampled: 06/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06900929 sampled: 07/10/90 LC50: 84.5 % 95% fid. limits: 72.6 - 100.7 % slope: 11.7 comments: 80% MORTALITY IN FULL STRENGTH EFFLUENT 06901107 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901314 sampled: 09/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 01900195 sampled: 09/10/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit effluent in manhole 15 26 COMPANY: ICI Canada Inc., Cornwall (390401) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY Results from six Daphnia magna acute lethality toxicity tests conducted on samples from Effluent in LEL-2 were submitted by ICI Canada Inc. Five of six samples were not acutely lethal to Daphnia magna. The remaining sample was acutely lethal to Daphnia and the LC50 was 39.0 %. A sample collected and tested by the Ministry in September was non-lethal. Effluent in LEL-2 06900674 sampled: 06/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED 06900930 sampled: 07/10/90 LC50: 39.0 % 95% fid. limits: 30.4 - 48.6 % slope: 4.7 comments: 70% MORTALITY IN 50% TEST CONCENTRATION. 06901108 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901315 sampled: 09/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 02900195 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 06901509 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901844 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED 27 COMPANY: ICI Canada Inc., Courtright (390203) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for six trout bioassays, conducted on plant final effluent samples collected between June 1990 and November 1990, were provided by ICI Canada Inc. All six samples were not acutely lethal to test fish. A sample collected and tested by the Ministry in August was also non-lethal. Plant Final 05900141 sampled: 06/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900159 sampled: 07/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : non-lethal 0.0 % 01900169 sampled: 08/08/90 95% fid. limits: 0.0 - comments: MISA Audit; Non-lethal 05900172 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900200 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: 05900207 sampled: 10/17/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900215 sampled: 11/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 28 COMPANY : SECTOR: REGION: ICI Canada Inc (390203) (formerly CIL Inc.) Inorganic Chemical Southwest Courtright SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Plant Final Effluent (02 00) were submitted by ICI Canada Inc. All six samples were not acutely lethal to Daphnia. A sample collected and tested by the Ministry in August had a 48 h LC50 > 100%. Plant Final 05900141 sampled: 06/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900159 sampled: 07/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 02900169 sampled: 08/08/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit >100 05900172 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900200 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900207 sampled: 10/17/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900215 sampled: 11/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 29 COMPANY: International Minerals & Chemicals, Port Maitland (1500008) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for six trout bioassays, conducted on final effluent samples collected between June 1990 and November 1990, were provided by International Minerals and Chemicals. All six samples were non-lethal to test fish. Final Effluent 03900468 sampled: 06/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentraion test 03900603 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal ; single concentration test 03900653 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900806 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900907 sampled: 10/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900987 sampled: 11/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 30 COMPANY: International Minerals & Chemicals, Port Maitland (1500008) SECTOR: Inorganic Chemical REGION: West Central SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Final Effluent (0300) were submitted by International Minerals and Chemicals of Port Maitland. Four of six samples were not acutely lethal to Daphnia, and one sample had 48 h LC50 > 100%. The sample collected in June was acutely lethal to Daphnia and the LC50 range was 50 - 100 %. Final Effluent 03900468 sampled: 06/11/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments : 50.0 - 100.0 03900603 sampled: 07/16/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 >100 03900653 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900806 sampled: 09/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900907 sampled: 10/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non Lethal 03900987 sampled: 11/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 31 COMPANY: Liquid Carbonic Inc., Courtright (36250306) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for seven trout bioassays, conducted on South ditch effluent samples collected between June 1990 and January 1991, were provided by Liquid Carbonic Incorporated. One of the seven samples, collected in June, was acutely lethal to test fish and had a LC50 of 13.0 %. A sample collected in January 1991 had a LC50 of > 100 % effluent. The remaining five samples were non-lethal. A sample collected and tested by the Ministry in September had a LC50 of > 100 %. Effluent to South Ditch 08900703 sampled: 06/20/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : 13.0 08900831 sampled: 07/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901011 sampled: 08/22/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 01900196 sampled: 09/12/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: MISA audit sample. >100 08901151 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: 08901641 sampled: 11/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: 08901863 sampled: 12/11/90 non-lethal 95% fid. limits: 0.0 -' 0.0 % comments: 08910191 sampled: 01/23/91 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 32 COMPANY: Liquid Carbonic Inc., Courtright (36250306) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY Results for eight Daphnia magna acute lethality toxicity tests conducted on samples of Effluent to South Ditch (0100) were submitted by Liquid Carbonic Inc. of Courtright. Four of the eight samples were not acutely lethal to Daphnia and three samples have LC50s of > 100 % effluent. The sample collected in June was acutely lethal to Daphnia and the LC50 was 16.8 %. A sample collected and tested by the Ministry in September was non-lethal. Effluent to South Ditch 08900704 sampled: 06/20/90 LC50: 95% fid. limits: 15.6 - 17.9 % comments : 16.8 08900832 sampled: 07/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901012 sampled: 08/22/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 02900196 sampled: 09/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 08901152 sampled: 09/19/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08901392 sampled: 10/24/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments : >100 08901642 sampled: 11/21/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: >100 08901864 sampled: 12/11/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 33 Liquid Carbonic Inc. (continued) 08910192 sampled: 01/23/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 34 COMPANY: Liquid Carbonic Inc. , Maitland (36250108) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY The data for seven trout bioassays, conducted on Main Outfall effluent samples collected between June 1990 and January 1991, were provided by Liquid Carbonic Incorporated. Six of the seven samples were not acutely lethal to test fish. The remaining sample, collected in January 1991, had a LC50 of > 100 % effluent. A sample collected and tested by the Ministry in October had a LC50 of > 100 % effluent. Effluent to Main Outfall 08900701 sampled: 06/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08900833 sampled: 07/17/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: 08901001 sampled: 08/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % $ comments : $ 08901251 sampled: 09/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900211 sampled: 10/10/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: MISA audit sample. >100 08901393 sampled: 10/24/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901861 sampled: 12/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910151 sampled: 01/16/91 LC50; 95% fid. limits: 0.0 - 0.0 % comments : >100 35 COMPANY: Liquid Carbonic Inc., Maitland (36250108) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY Results for seven Daphnia magna acute lethality toxicity tests conducted on samples of Effluent to Main Outfall (0100) were submitted by Liquid Carbonic Inc. of Maitland. Five of the sevensamples were not acutely lethal to Daphnia, and the other two samples have 48 h LC50s of > 100% effluent. Effluent to Main Outfall 08900702 sampled: 06/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901002 sampled: 08/21/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: >100 08901252 sampled: 09/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900211 sampled: 10/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA audit sample. 08901394 sampled: 10/24/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08901682 sampled: 11/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901862 sampled: 12/12/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910152 sampled: 01/16/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 36 COMPANY: Nitrochem Inc., Maitland (1710003) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY The data for six trout bioassays, conducted on final effluent samples collected between June 1990 and November 1990, were provided by Nitrochem Incorporated. All six samples were acutely lethal to the test fish. The 96 hour LC50S ranged from 3.1 % to 14.1 % effluent. Final Effluent 03900482 sampled: 06/12/90 LC50: 14 . 1 % 95% fid. limits: 10.0 - 20.0 % comments : Lethal 03900589 sampled: 07/10/90 LC50: 7.1 % 95% fid. limits: 5.0 - 10.0 % comments : 03900700 sampled: 08/14/90 LC50: 3.1 % 95% fid. limits: 2.1 - 4.5 % slope: 4.5 comments : 03900807 sampled: 09/11/90 LC50: 14 . 1 % 95% fid. limits: 10.0 - 20.0 % comments : 03900895 sampled: 10/09/90 LC50: 3.5 % 95% fid. limits: 2.5 - 5.0 % comments : 03900966 sampled: 11/06/90 LC50: 6.3 % 95% fid. limits: 4.7 - 8.5 % slope: 5.5 comments : 37 COMPANY: Nitrochem Inc., Maitland (1710003) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Final Effluent (0400) were submitted by Nitrochem Inc. of Maitland. All six samples were acutely lethal to Daphnia with 48 h LC50s between 4.7 % and 18.0 %. Final Effluent 03900482 sampled: 06/12/90 LC50: 10.6 % 95% fid. limits: 4.8 - 16.2 % slope: 2.2 comments : 03900589 sampled: 07/10/90 LC50: 14.5 % 95% fid. limits: 10.9 - 19.2 % slope: 4.5 comments : 03900700 sampled: 08/14/90 LC50: 4.7 % 95% fid. limits: 3.4 -. 6.3 % slope: 4.1 comments : 03900807 sampled: 09/11/90 LC50: 5.6 % 95% fid. limits: 3.6 - 8.5 % slope: 2.5 comments : 03900895 sampled: 10/09/90 LC50: 12.7 % 95% fid. limits: 10.0 - 16.0 % slope: 5.6 comments : 03900966 sampled: 11/06/90 LC50: 18 . % 95% fid. limits: 13.0 - 25.0 % comments : 38 COMPANY: Norton Canada Inc., Niagara Falls (1650001) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for eighteen trout bioassays, conducted on Sewer B, C and D effluent samples collected between June 1990 and November 1990, were provided by Norton Canada Incorporated. Five of the six samples collected from Sewer B were not acutely lethal to the test fish. The remaining sample had a LC50 of > 100 % effluent. A sample collected and tested by the Ministry had a LC50 of > 100 %. Four of the six Sewer C samples were non-lethal. A sample collected in September was acutely lethal to test fish. The 96 hour LC50 was 65 % - 100 % effluent. All six Sewer D samples were non-lethal. Sewer B 03900476 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single concentration test; Non lethal 03900569 sampled: 07/04/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; 5% mort. @ 100' 01900150 sampled: 07/23/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit 03900657 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900771 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900875 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900944 sampled: 11/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 39 Norton Canada Inc. (continued) Sewer C 03900477 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900570 sampled: 07/04/90 LC50: >'100 % 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; 100% mort. @ 100^ 03900658 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900772 sampled: 09/05/90 LC50: 65.0 - 100.0 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 03900876 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900945 sampled: 11/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal Sewer D 03900478 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single concentration Test; Non lethal 03900571 sampled: 07/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; Non lethal 03900659 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900773 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900877 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; Non-lethal 03900946 sampled: 11/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration test; non-lethal 40 COMPANY : SECTOR: REGION: Norton Canada Inc., Niagara Falls (1650001) Inorganic Chemical West Central SUMMARY Results for eighteen Daphnia magna acute lethality toxicity tests conducted on samples from three separate outfalls were submitted by Norton Canada Inc. of Niagara Falls. Four of the six samples from Sewer B (#200) were not acutely lethal to Daphnia, and the other two samples have 48 h LC50s > 100%. A sample collected and tested by the Ministry in July also had a LC50 of > 100 %. Three of the six samples from Sewer C (03 00) were non-lethal, and the other three samples have LC50S of > 100%. Four of the six samples from Sewer D (0400) were non-lethal and the other two samples have LC50s of > 100 % effluent. Sewer B 03900476 sampled: 06/13/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900569 sampled: 07/04/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: LC50 > 100 >100 02900150 sampled: 07/23/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit >100 03900657 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900771 sampled: 09/05/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 >100 03900875 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900944 sampled: 11/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 41 Norton Canada Inc. (continued) Sewer C 03900477 sampled: 06/13/90 95% fid. limits: 0.0 - comments: Non-lethal 03900570 sampled: 07/04/90 95% fid. limits: O.O - comments: LC50 > lOO 03900658 sampled: 08/08/90 95% fid. limits: 0.0 - comments: Non-lethal 03900772 sampled: 09/05/90 95% fid. limits: 0.0 - comments: LC50 >100 03900876 sampled: 10/02/90 95% fid. limits: 0.0 - comments: Non-lethal 03900945 sampled: 11/05/90 95% fid. limits: 0.0 - comments: Non-lethal Sewer D non-lethal 0.0 % LC50: >100 0.0 % non-lethal 0.0 % LC50: >100 0.0 % non-lethal 0.0 % LC50: >100 0.0 % 03900478 sampled: 06/13/90 95% fid. limits: o.O - comments: Non-lethal 03900571 sampled: 07/04/90 95% fid. limits: 0,0 - comments: LC50 > 100 03900659 sampled: 08/08/90 95% fid. limits: o.O - comments: Non-lethal 03900773 sampled: 09/05/90 95% fid. limits: 0.0 - comments: LC50 >100 03900877 sampled: 10/02/90 95% fid. limits: 0.0 - comments: Non-lethal 03900946 sampled: 11/05/90 95% fid. limits: o.O - comments: Non-lethal non-lethal 0.0 % LC50: >100 0.0 % non-lethal 0.0 % LC50: >100 0.0 % non-lethal 0.0 % non-lethal 0.0 % 42 COMPANY: Partek Insulations Ltd.-, Sarnia (20150009) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for two trout bioassays, conducted on C Water Overflow samples collected between June 1990 and November 1990, were provided by Partek Insulations Limited. Both samples were acutely lethal to the test fish . The measured 96 hour LC50S were 51.1 % and 44.3 % effluent. C Water Overflow 05900187 sampled: 08/27/90 LC50: 51.1 '- 95% fid. limits: 41.2 - 63.5 % slope: 3 comments: Probit Program by J.T.Trevors 198 6 05900217 sampled: 11/26/90 LC50: 44.3 : 95% fid. limits: 36.3 - 53.8 % comments : 43 COMPANY: Partek Insulations Ltd., Sarnia (20150009) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for two Daphnia bioassays conducted on C water Overflow samples were provided by Partek Insulations Ltd. Both samples were acutely lethal to Daphnia. The LC50s were 70.8 % and 19.6 %. C Water Overflow 05900187 sampled: 08/27/90 LC50: 70.8 % 95% fid. limits: 59.1 - 84.9 % slope: 4.5 comments: Probit Program by J.T.Trevors 1986 05900217 sampled: 11/26/90 LC50: 19.6 % 95% fid. limits: 18.1 - 21.3 % comments : 44 COMPANY: Puritan-Bennett Canada Ltd. , Maitland (36910008) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY The data for two trout bioassays, conducted Effluent to Creek samples collected between June 1990 and December 1990, were provided by Puritan-Bennett Canada Limited. Both samples were acutely lethal to the test fish. The 96 hour LC50S were 59.2 % and 43.2 %. Effluent to Creek 16900026 sampled: 09/19/90 LC50: 59.2 95% fid. limits: 59.1 - 59.1 % comments : 16900045 sampled: 12/18/90 LC50: 43.3 95% fid. limits: 35.4 - 52.7 % comments : 45 COMPANY: Puritan-Bennett Canada Ltd., Maitland (36910008) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY Effluent to Creek 16900021 sampled: 09/19/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO LC-50 DUE TO >50% SURVIVAL AT 100% CONC, 16900035 sampled: 12/18/90 LC50: 93.5 % 95% fid. limits: 80.8 - 129.2 % comments: SLOPE = 8.605479 Rain Gauge Intake Water 46 COMPANY: Stanchem, Cornwall (391508) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY The data for four trout bioassays, conducted on Conpac effluent samples collected between June 1990 and November 1990, were provided by Stanchem. Two of the four samples were non-lethal and the other two samples produced LC50s of > 100 % effluent. A sample collected and tested by the Ministry in August was, non-lethal . Effluent from Conpac 06900675 sampled: 06/05/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 20% MORTALITY IN THE 100% CONCENTRATION 06900832 sampled: 07/04/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 10% MORTALITY IN FULL STRENGTH EFFLUENT 01900168 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 06901105 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 06901316 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR SUBLETHAL IMPAIRMENT OBSERVED 47 COMPANY: Stanchem, Cornwall (391508) SECTOR: Inorganic Chemical REGION: Southeast SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Effluent from Conpac (0100) were submitted by Stanchem of Cornwall. Three of the six samples were non-lethal to Daphnia and one sample had a LC50 of > 100 % effluent. Two samples, collected in July and November, were acutely lethal to Daphnia and the LC50s were 0.2 % and 24.5 %. A sample collected and tested by the Ministry in August was non-lethal. Effluent from Conpac 06900676 sampled: 06/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED DURING TE 06900836 sampled: 07/04/90 LC50: 0.2 % 95% fid. limits: 0.1 - 0.2 % slope: 8.3 comments: CONDUCTIVITY IN 100% CONC. MUST BE MULTIPLIED 06901106 sampled: 08/08/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 20% MORTALITY IN FULL STRENGTH EFFLUENT 02900168 sampled: 08/08/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Many Floaters 06901317 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: CONDUCTIVITY IN 100% TO BE MULTIPLIED BY 10. 06901511 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: NO MORTALITY OR IMMOBILITY OBSERVED IN 48 HRS 06901842 sampled: 11/07/90 LC50: 24.5 % 95% fid. limits: 20.0 - 30.0 % comments: 100% MORTALITY IN THE 30% CONCENTRATION 48 COMPANY: Sulco Chemicals Ltd. (85750008) SECTOR: Inorganic Chemical REGION: West Central Elmira SUMMARY The data for five trout bioassays, conducted on final effluent samples collected between June 1990 and November 1990, were provided by Sulco Chemicals Limited. All five samples were not acutely lethal to the test fish. Final Effluent 08900691 sampled: 06/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08900811 sampled: 07/18/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08900961 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901241 sampled: 09/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901451 sampled: 10/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 49 COMPANY: Sulco Chemicals Ltd., Elmira (85750008) SECTOR: Inorganic Chemical REGION: West Central SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Final Effluent (0100) were submitted by Sulco Chemicals Ltd. of Elmira. Four of six samples were not acutely lethal to Daphnia, and two samples have 48 h LC50S > 100 %. Final Effluent 08900692 sampled: 06/20/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08900812 sampled: 07/18/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08900962 sampled: 08/15/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901242 sampled: 09/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901452 sampled: 10/31/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: >100 08901672 sampled: 11/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 50 COMPANY ; SECTOR: REGION: UCAR Carbon Canada Ltd. , Welland (380204) (formerlyUnion Carbide Inc.) Inorganic Chemical West Central SUMMARY The data for fourteen trout bioassays, conducted on # 2 weir effluent, Government Dock effluent, and Pump House Return effluent samples collected between June 1990 and November 1990, were provided by UCAR Carbon Canada Ltd. One of two samples from the # 2 weir effluent was not acutely lethal. The other sample produced a LC50 result of > 100 % effluent. All six Government Dock samples were non-lethal. A sample collected and tested by the Ministry in July was also non-lethal. Five of the six samples of Pump House Return effluent was non-lethal, and the remaining sample produced a 96 hour LC50 result of > 100 % effluent. A sample collected from Pump House Return effluent and tested by the Ministry in July was also non-lethal. #2 Weir Effluent 03900566 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 -, 0.0 % comments: Single Concentration Test; Non lethal 03900868 sampled: 10/01/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 >100 Government Dock Effluent 03900434 sampled: 06/04/90 95% fid. limits: 0.0 - non-lethal 0.0 % comments: Single Concentration Test; non-, lethal 03900567 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; Non lethal 01900142 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 03900651 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900768 sampled: 09/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 51 UCAR Carbon Canada Ltd. (continued) 03900869 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900954 sampled: 11/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal Pump House Return Effl 03900435 sampled: 06/04/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; 5%mort §100^ 03900568 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; Non lethal 01900143 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 03900652 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900770 sampled: 09/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900867 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non Lethal; single concentration test 03900955 sampled: 11/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 52 COMPANY : SECTOR: REGION: UCAR Carbon Canada Ltd., Welland (380204) (formerly Union Carbide Inc.) Inorganic Chemical West Central SUMMARY Results from twelve Daphnia magna acute lethality toxicity tests conducted on samples from three separate outfalls were siibmitted by UCAR Carbon Canada Limited. One of two samples from the #2 Weir Effluent (0100) was not acutely lethal to Daphnia and the other had LC50 of > 100 % effluent. All five samples of Government Dock Effluent (0200) were non-lethal. All five samples of Pump House Return Efluent (03 00) were non-lethal. Samples of Government Dock effluent and Pump House Return effluent were tested by the Ministry and both were non-lethal. #2 Weir Effluent 03900566 sampled: 07/03/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: 21% mortality @ 100% effluent concentration 03900868 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal Government Dock Effluent 03900434 sampled: 06/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900567 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 02900142 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit 03900651 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % coinments: Non-lethal 03900768 sampled: 09/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 53 UCAR Carbon Canada Ltd. (continued) 03900869 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal Pump House Return Effl 03900435 sampled: 06/04/90 95% fid. limits: 0.0 - comments: Non lethal non-lethal 0.0 % 03900568 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 02900143 sampled: 07/16/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit 03900652 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900770 sampled: 09/04/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900867 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 54 COMPANY: Union Carbide Canada Ltd., Moore TWP (381608) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY The data for eight trout bioassays, conducted on final effluent samples collected between June 1990 and January 1991, were provided by Union Carbide Canada Limited. Seven of the eight samples were non-lethal and the remaining had a LC50 of > 100 % effluent. A sample collected and tested by the Ministry in October was also non-lethal. Final Effluent 08900713 sampled: 06/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08900881 sampled: 07/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901021 sampled: 08/28/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901191 sampled: 09/25/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 01900228 sampled: 10/10/90 95% fid. limits: 0.0 - comments: MISA Audit; Non- non-lethal 0.0 % lethal 08901413 sampled: 10/29/90 95% fid. limits: 0.0 - comments : LC50: >100 0.0 % 08901703 sampled: 11/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910011 sampled: 12/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910221 sampled: 01/29/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 55 COMPANY: Union Carbide Canada Ltd., Moore TWP (381608) SECTOR: Inorganic Chemical REGION: Southwest SUMMARY Results for eight Daphnia magna acute lethality toxicity tests conducted on samples of Final Effluent (0100) were submitted by Union Carbide Canada Ltd. of Moore Township. Six of eight samples were not acutely lethal to Daphnia. The sample collected in August had a LC50 of > 100 % effluent. The sample collected in January 1991 was acutely lethal and had a LC50 of 70.7 % effluent. A sample collected and tested by the Ministry in October had a LC50 of > 100 % effluent. Final Effluent 08900714 sampled: 06/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08900882 sampled: 07/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901022 sampled: 08/28/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08901192 sampled: 09/25/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 02900228 sampled: 10/10/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit >100 08901414 sampled: 10/29/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901704 sampled: 11/26/90 95% fid. limits: 0.0 - comments : non-lethal 0.0 % 08910012 sampled: 12/31/90 95% fid. limits: 0.0 - comments : non-lethal 0.0 % 08910222 sampled: 01/29/91 95% fid. limits: 57.2 - comments : LC50: 70.7 % 87.3 % slope: 9.2 56 COMPANY : SECTOR: REGION: Union Carbide Canada Ltd. (381509) Inorganic Chemical Southwest Sarnia SUMMARY The data for eight trout bioassays, conducted on Cole Drain effluent samples collected between June 1990 and January 1991, were provided by Union Carbide Canada Limited. Four of the eight samples were non-lethal and the other four samples had LC50 results of > 100 % effluent, A sample collected and tested by the Ministry in October was non-lethal. Effluent to Cole Drain 08900711 sampled: 06/26/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: >100 08900883 sampled: 07/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901031 sampled: 08/28/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: 08901193 sampled: 09/25/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 01900227 sampled: 10/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 08901411 sampled: 10/29/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08901701 sampled: 11/26/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments : >100 08910015 sampled: 12/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910223 sampled: 01/29/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 57 COMPANY: Union Carbide Canada Ltd., Sarnia (381509) SECTOR: Inorganic Chemical REGION: Southwest ' SUMMARY Results for eight Daphnia magna acute lethality toxicity tests conducted on samples of Effluent to Cole Drain (0100) were submitted by Union Carbide Canada Ltd. of Sarnia. Six of the eight samples were acutely lethal to Daphnia and the LC50S ranged from 32.7 % to 91.2 %. The remaining two samples have LC50s of > 100 % effluent. Effluent to Cole Drain 08900712 sampled: 06/26/90 LC50: 32.7 % 95% fid. limits: 26.0 - 40.9 % comments : 08900884 sampled: 07/31/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments : 08901032 sampled: 08/28/90 LC50: 61.4 % 95% fid. limits: 48.7 - 77.4 % comments : 08901194 sampled: 09/25/90 LC50: 82.0 % 95% fid. limits: 46.5 - 394.6 % slope: 1.6 comments : 08901412 sampled: 10/29/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments : 08901702 sampled: 11/26/90 LC50: 91.2 % 95% fid. limits: 70.1 - 160.5 % slope: 5.4 comments : 08910014 sampled: 12/31/90 LC50: 78.6 % 95% fid. limits: 54.9 - 164.1 % slope: 2.9 comments : 08910224 sampled: 01/29/91 LC50: 35.4 % 95% fid. limits: 35.3 - 35.3 % comments : 58 COMPANY : SECTOR: REGION: Union Carbide Canada Ltd, (381202) Inorganic Chemical Northeast Sault Ste. Marie SUMMARY The data for six trout bioassays, conducted on samples of effluent discharging to Outfall at SD collected between June 1990 and January 1991, were provided by Union Carbide Canada Limited. Four of the six samples were not acutely lethal and the remaining two samples had LC50 results of > 100 % effluent. A sample collected and tested by the Ministry in July had a LC50 result of > 100 % effluent Effluent to Outfall at SD 08900721 sampled: 06/26/90 LC50: >100 95% fid. limits: 0.0 - 0.0 % comments: Mortality appeared natural. 01900145 sampled: 07/17/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit >100 08900911 sampled: 07/31/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901041 sampled: 08/27/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08901441 sampled: 10/29/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08910021 sampled: 01/01/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910231 sampled: 01/28/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 59 COMPANY: Union Carbide Canada Ltd., Sault Ste. (381202) SECTOR: Inorganic Chemical REGION: Northeast Marie SUMMARY Results from six Daphnia magna acute lethality toxicity tests conducted on samples of Effluent to Outfall at SD (0100) were submitted Union Carbide Canada Ltd. of Sault Ste. Marie. The sample collected in October was acutely lethal to Daphnia and had a LC50 of 60.5 %. Of the remaining samples, three were non-lethal and two samples had LC50s of > 100 % effluent. One of the two samples collected and tested by the Ministry was acutely lethal to Daphnia and the LC50 was 63.3 % . The other sample had a LC50 of > 100 % effluent. Effluent to Outfall at SD 08900722 sampled: 06/26/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: 02900145 sampled: 07/17/90 LC50; 95% fid. limits: 53.7 - 74.6 % comments: MISA Audit 63.3 08900912 sampled: 07/31/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 08901042 sampled: 08/27/90 LC50: 95% fid. limits: 0.0 - 0.0 % comments : >100 02900227 sampled: 10/10/90 95% fid. limits: 0.0 - LC50; 0.0 % >100 comments: MISA Audit/Circling reaction in 5% cone. 08901442 sampled: 10/29/90 LC50: 60.5 % 95% fid. limits: 49.7 - 73.5 % comments : 08910022 sampled: 01/01/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 08910232 sampled: 01/28/91 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 60 COMPANY: Washington Mills Electro Minerals, Niagara Falls (1660000) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for twelve trout bioassays, conducted on Queen Lagoon effluent, and Old Lagoon effluent samples collected between June 1990 and November 1990, were provided by- Washington Mills Electro Minerals. All twelve Queen Lagoon effluent and Old Lagoon effluent samples were not acutely lethal. Samples collected and tested by the Ministry from both Queen Lagoon and Old Lagoon effluent were non-lethal . Queen Lagoon Effluent 03900453 sampled: 06/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 01900134 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 03900563 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; Non lethal 03900655 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900765 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900880 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900962 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal Old Lagoon Effluent 03900452 sampled: 06/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 61 Washington Mills Electro Minerals (continued) 03900564 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; Non lethal 01900135 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 03900656 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single concentration test; non-lethal 03900766 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900879 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900963 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 62 COMPANY: Washington Mills Electro Minerals, Niagara Falls (1660000) SECTOR: Inorganic Chemical REGION: West Central SUMMARY Results for twelve Daphnia magna acute lethality toxicity tests conducted on samples of Queen Lagoon Effluent (#100) and Old Lagoon Effluent (02 00) were submitted by Washington Mills Electro Minerals of Niagara Falls. Four of six samples of Queen Lagoon Effluent were not acutely lethal to Daphnia and the remaining two samples have LC50s of > 100%. Five of six samples of Old Lagoon Effluent were non-lethal, and one sample had an LC50 > 100 %. A sample from each discharge was collected and tested by the Ministry in July and both produced LC50 results of > 100 % effluent. Queen Lagoon Effluent 03900453 sampled: 06/05/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments : >100 03900563 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 02900134 sampled: 07/03/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit >100 03900655 sampled: 08/07/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 >100 03900765 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900880 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : Non-lethal 03900962 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 63 Washington Mills Electro Minerals (continued) Old Lagoon Effluent 03900452 sampled: 06/05/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments : . 02900135 sampled: 07/03/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Many floaters over all cone. 03900564 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900656 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900766 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900879 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 03900963 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 64 COMPANY: Washington Mills Ltd., Niagara Falls (1950005) SECTOR: Inorganic Chemical REGION: West Central SUMMARY The data for six trout bioassays, conducted on final effluent samples collected between June 1990 and November 1990, were provided by Washington Mills Limited. All six samples were not acutely lethal to the test fish. A sample collected and tested by the Ministry in July was also non-lethal. Final Effluent 03900454 sampled: 06/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 03900565 sampled: 07/03/90 95% fid. limits: 0.0 - non-lethal 0.0 % comments: Single Concentration Test; Non lethal 01900138 sampled: 07/09/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Non-lethal 03900654 sampled: 08/07/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900767 sampled: 09/05/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal; single concentration test 03900878 sampled: 10/02/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 03900961 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Single Concentration Test; non-lethal 65 COMPANY: Washington Mills Ltd., Niagara Falls (1950005) SECTOR: Inorganic Chemical REGION: West Central SUMMARY Results for six Daphnia magna acute lethality toxicity tests conducted on samples of Final Effluent (0100) were submitted by Washington Mills Ltd. of Niagara Falls. Three of six samples were not acutely lethal to Daphnia and the other three samples have LC50s > 100 %. A sample collected and tested by the Ministry in July had a LC50 of > 100 % effluent. Final Effluent 03900454 sampled: 06/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 03900565 sampled: 07/03/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non lethal 02900138 sampled: 07/09/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: MISA Audit; Very High Conductivity 03900654 sampled: 08/07/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 03900767 sampled: 09/05/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 03900878 sampled: 10/02/90 LC50: >100 % 95% fid. limits: 0.0 - 0.0 % comments: LC50 >100 03900961 sampled: 11/06/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments: Non-lethal 66 COMPANY : SECTOR: REGION: Welland Chemical Ltd. , Sarnia (18530006) Inorganic Chemical Southwest SUMMARY The data for ten trout bioassays, conducted on samples collected from South Lagoon effluent, # 1 Lagoon effluent, Chlorine Fill UN effluent , Alum Chloride E Wall, and Alum Chloride W Wall discharges between December 1989 and May 1990, were provided by Welland Chemical Limited. Three of four South Lagoon effluent samples were acutely lethal to the test fish. The 96 hour LC50s were 62.8 %, 29.2 % and 36.0 % effluent. The remaining sample had a LC50 result of > 100 % effluent. Two of the three # 1 Lagoon effluent samples were non-lethal. The other sample had a LC50 of > 100 % effluent. The Chlorine Fill UN effluent and Alum Chloride W Wall effluent samples were both non-lethal to test fish. The Alum Chloride E Wall effluent sample had a LC50 result of > 100 % effluent. South Lagoon Effluent 05900142 sampled: 06/20/90 LC50; 95% fid. limits: 0.0 - 0.0 % comments: 100% X 10 >100 05900146 sampled: 07/09/90 LC50: 62.8 % 95% fid. limits: 55.5 - 70.6 % slope: 16.8 comments: 100%, 75% Cconcentration Cond. multiple by 10 05900186 sampled: 08/22/90 LC50: 95% fid. limits: 20.7 - 41.3 % comments : 29.2 05900218 sampled: 11/26/90 LC50: 95% fid. limits: 25.9 - 45.8 % comments: 100,75,56% X Conductivity by 10 36.0 #1 Lagoon Effluent 05900161 sampled: 07/25/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900203 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900216 sampled: 11/21/90 LC50 95% fid. limits: 0.0 - 0.0 % comments : >100 67 Welland Chemical Ltd. (continued) Chlorine Fill UN Effluent 05900148 sampled: 07/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : Alum Chloride E Wall 05900149 sampled: 07/10/90 LC50: >100 95% fid. limits: 0.0 - 0.0 % comments : Alum Chloride W Wall 05900150 sampled: 07/10/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 68 COMPANY : SECTOR: REGION: Welland Chemical Ltd. (18530006) Inorganic Chemical Southwest Sarnia SUMMARY Results for ten Daphnia magna acute lethality toxicity tests conducted on samples from five separate discharge points and one intake site were submitted by Welland Chemicals Ltd. of Sarnia. Four samples of South Lagoon Effluent (0100) were acutely lethal to Daphnia and have LC50s between 19.6 % and 61.5 % effluent. The three samples of #1 Lagoon Effluent (0200) were non-lethal. One sample of Chlorine Fill UN Effluent (03 00) had a LC50 of 31.3 %. One sample from the Alum Chloride E Wall (0400) had a LC50 of 40.3 %. One sample from the Alvim Chloride W Wall (0500) had a LC50 of 70.8 %. South Lagoon Effluent 05900142 sampled: 06/20/90 LC50: 95% fid. limits: 50.4 - 70.7 % comments: 100% Multiply by 10 59.8 05900146 sampled: 07/09/90 LC50: 46.7 % 95% fid. limits: 36.9 - 59.1 % comments: 100% Cone. Conductivity Multiple by 10 05900186 sampled: 08/22/90 LC50: 95% fid. limits: 49.8 - 83.9 % comments : 61.5 05900218 sampled: 11/26/90 LC50: 95% fid. limits: 18.1 - 21.3 % comments: 100% & 50% X Conductivity by 10 19.6 #1 Lagoon Effluent 05900161 sampled: 07/25/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900203 sampled: 10/01/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 05900216 sampled: 11/21/90 non-lethal 95% fid. limits: 0.0 - 0.0 % comments : 69 Welland Chemical Ltd. (continued) Chlorine Fill UN Effluent 05900148 sampled: 07/10/90 LC50: 31.3 % 95% fid. limits: 28.7 - 34.2 % slope: 6.7 comments: Probit Program by J.T.Trevors (1986) Alum Chloride E Wall 05900149 sampled: 07/10/90 LC50: 40.3 % 95% fid. limits: 33.9 - 46.1 % comments : Alum Chloride W Wall 05900150 sampled: 07/10/90 LC50: 70.8 % 95% fid. limits: 59.1 - 84.8 % slope: 4.5 comments: Probit Program by J.T. Tevors (1986) 70 1 f / \