treatment investigation: removal of cyanide from for ... · the blackening process, metal parts are...

Treatment Investigation: Removal of Cyanide from

Blackening Process Wastewater for

Scovill Fasteners, Inc. Clarkesville, Georgia

Prepared for:

Scovill Fasteners, Inc. Post Office Box 44

Clarkesville, Georgia 30523

Prepared by:

Environmental Coporation of America 1111 Aldemian Dr., Suite 200

Alpharetta, Georgia 30202-41 43 404- 667-2040

Project No. 5-612-1

July 19, 1995

Scovill Fasteners, Inc. P. 0. Box 44 Clarkesville, Georgia 30523

Attention: . Mr. Troy Jones

Subject: Summary of Findings: Treatment Investigation for the Removal of Cyanide from Blackening Process Wastewater

ScoviU Fasteners, Clarkesville Plant ECA Project No: 5-612-1

Dear Troy:

Environmental Corporation of America (ECA) is pleased to provide this report of our investigation into treatment methods for wastewater from the blackening process at the subject facility. Work on this project was based on our proposal number 5-248-1, dated June 27, 1995, and authorized by the Proposal Acceptance Sheet signed June 30, 1995.

This report summarizes information found during a review of literature, summarizes the results of analytical tests, and presents a treatment plan for the rinse and bath waters from the blackening operation. The calculated ionic concentrations and stoichiometric chlorine demand of the wastewater, and a discussion of gases which may be produced during handling or treatment of the wastewater are also provided.

Purpose

The purpose of this project was to establish and document proper treatment methods for reducing concentrations of cyanide in wastewater discharges from the blackening process.

Scope of Work

The scope of work to fulfill the project purpose included the following items:

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0 The subject facility was inspected to characterize the blackening process rinse and bath waters, to assess current wastewater treatment capabilities at the plant, and to collect samples of rinse water and each bath solution.

i:\ %\9Sproj\S-612.1\report.rpt J 1 1111 ALDERMAN DRIVE, Smn 200, ALP-A, GA 30202, 404-667-2040, FAX 404-667-2041

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Mr. Troy Jones July 19, 1995 Page 2

0 A review of literature was conducted at ECA's library and at the Georgia Institute of Technology library to identify research previously conducted on treatment processes for cyanide- and metal-containing wastewater.

0 Samples and mixtures of samples were analyzed for cyanide and metals content, as well as the amenability of cyanide to treatment using alkaline chlorination under different conditions.

0 Using results from the analyses performed and data on the chemicals used in the bath solutions, the chemical make-up of each bath solution and of the rinse water was determined. The stoichiometric chlorine demand of the wastewater was then determined, and gases which may be generated by treatment of the wastewater were identified.

0 This report documenting our findings and recommendations was prepared.

Background Information

Scovill Fasteners, Inc. (Scovill) owns and operates a metal plating and finishing plant in Clarkesville, Georgia. Wastewaters from the metal plating operations are treated on site by alkaline chlorination, for removal of cyanide, and alkaline precipitation, for removal of metals. Treated wastewater is discharged to surface waters under NPDES Permit No. GAOOOl112, issued by the Georgia Department of Natural Resources, Environmental Protection Division (EPD).

Over the past several months, low concentrations of cyanide have been detected in samples of treated effluent from the plant. As documented in a letter to the EPD on June 26, 1995, Scovill identified a relatively new blackening operation as a possible source of cyanide. Scovill requested and was granted permission from the EPD to collect rinse water from the process in a 9,000 gallon tank while an acceptable treatment method was found. On June 30, 1995, ECA was contracted to determine and document a treatment method for the blackening process rinse water and process waters.

Wastewater from the blackening process consists of spent bath solutions and rinse water. During the blackening process, metal parts are placed in a plating barrel and immersed in an acidic nickel chloride solution (nickel bath). The barrel is then immersed in three rinse baths to remove excess nickel solution, and then in a bath containing Ebonol@ 2-80 in solution (2-80 bath). Finally, the barrel is immersed in the second and third rinse baths to remove excess 2-80 solution. Prior to identifying the process as a possible source of cyanide, the wastewater bypassed the alkaline chlorination process.

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Review of Literature Key Findings

A review of available literature determined the following:

The alkaline chlorination procedure employed at Scovill is the most commonly used treatment technology for cyanide removal in metal plating wastewater. The procedure involves two stages.

During the first stage, hydrated lime (Ca(OH),) is added to the wastewater to increase the pH to 10 or higher. Wastewater is then pumped through a chlorine contact chamber, or chlorinator, to add chlorine (Cld to the water until a chlorine residual is achieved. In the alkaline environment, chlorine is converted to hypochlorite (OC1-), which reacts with free cyanide (CN-) to form cyanogen chloride (CNCl), and then cyanate (CNO-). These reactions take a total of one to twenty minutes under laboratory conditions. Equations for these reactions are shown below:

Ca(OH), + Cl, Ca2’ + C1- + OC1- + H20 (1)

2 CN- + 2 OC1- + 2 H 2 0 --t 2 CNCl + 4 OH- (2)

2 CNCl + 4OH- -j 2 CNO- + 2 C1- + 2 HZO (3)

During the second stage, the pH is lowered to between 8 and 8.5. Under these moderate pH conditions, hypochlorite reacts rapidly with cyanate to form nitrogen and carbon dioxide gases. This reaction takes roughly 30 minutes under laboratory conditions. The reaction equation is shown below:

2 CNO- + 3 OC1- + H20 -j N2 + 2 C02 + 3 C1- + 2 OH- (4)

The optimum operating conditions for cyanide destruction using the alkaline chlorination process, as found in the literature, are tabulated below. Actual operating conditions currently employed at the Scovill treatment plant are also tabulated for comparison.

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Parameter

pH for stage 1

Chlorine residual

Reaction time for stage 1


Optimum (from lit. review)

pH > 10

2% residual

Minimum 20 minutes

pH for stage 2 I pH 8.0 to 8.5

Reaction time for stage 2 1 Minimum 30 minutes

Actual (at Scovill plant)

pH > 11

Sufficient residual to turn KI starch paper deep blue

90 minutes

pH 8.3 to 8.6

60 to 90 minutes

A review of analytical tests performed previously and of Material Data Safety Sheets for the raw materials used in the bath solutions indicated that both cyanide and nickel are present in rinse water and both bath solutions. Cyanide and metal ions can combine to form stable complexes which may affect the treatability of cyanide. Cyanide complexes with most metals, including cadmium, zinc, and copper, can be successfully treated using the alkaline chlorination process with no changes to the parameters stated above.

Nickel complexes, usually in the form of tetracyanonickelate ( N i ( o 4 * - ) in alkaline solutions, may be more difficult to treat. However, successful treatment of nickel cyanide complexes has been achieved using the alkaline chlorination process by either increasing the temperature (to over 180°F) at which stage 1 is conducted, or by increasing the duration of stage 1.

DuPont conducted an exhaustive research project to evaluate the effectiveness of 12 separate technologies for the treatment of nickel cyanide complexes. The project report concluded that the most effective and safe method for treatment was alkaline chlorination (see Removal of Nickel from a Complex chemical Process Waste: Results and Key Learnings, by Jerry D. St. Clair, et al, published in the Proceedings from the 1994 International Symposium on Extraction and Processing for the Treatment and Minimization of Wastes, San Francisco, CA, February

first stage is conducted are increased, the rate and degree of cyanide destruction are increased. '1

&J Analytical Testing and Results

Samples from the nickel and Z-80 baths and of the rinse water were collected, preserved, and sent to Advanced Chemistry Labs, Inc. (ACL) in Atlanta on June 30, 1995, and July 10, 1995. Analytical tests were performed on each solution and on mixtures of the solutions. The tests were performed to determine if metal ions capable of forming metal cyanide complexes were present, to determine the treatability of cyanide with the alkaline chlorination process, and to

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determine the effect of increasing chlorination time upon the extent of cyanide destruction. Results are summarized on Table 1 in Appendix A, and copies of analytical test results are included in Appendix B.

Amenable and total cyanides were determined using EPA Methods 335.1 and 335.2, respectively. Amenable cyanides are those that are destroyed by alkaline chlorination. The amount of cyanide remaining after chlorination is the difference between the amenable and total cyanide. The procedure used to chlorinate samples in conducting Method 335.1 closely resembles that used at the Scovill plant. Therefore, the difference between total and amenable cyanides, as measured by the lab, should closely represent the amount of cyanide remaining in water treated by the alkaline chlorination process at the Scovill plant.

Analyses performed on rinse water in the holding tank indicate a total cyanide concentration of 0.26 mg/l and an amenable cyanide concentration of 0.22 mg/l. These results indicate that 85% of the total cyanide in rinse water in the holding tank is destroyed by alkaline chlorination, and that 0.04 mg/l cyanide will remain after chlorination. Analyses indicated a nickel concentration of 114 mg/l. Concentrations of other metals with the potential to form cyanide complexes were relatively low, ranging from 5.45 mg/l zinc to 0.50 mg/l chromium.

Analyses performed on the nickel bath solution indicate a total cyanide concentration of 3.71 mg/i and an amenable cyanide concentration of 3.63 mg/l. These results indicate that 98% of the total cyanide in the nickel bath solution is destroyed by alkaline chlorination, and that 0.08 mg/l cyanide will remain after chlorination. Analyses indicated a nickel concentration of 38,100 mg/l.

Analyses performed on the 2-80 bath solution indicate a total cyanide concentration of 11.8 mg/l and an amenable cyanide concentration of 2.30 mg/l. These results indicate that 19% of the total cyanide in the 2-80 bath solution is destroyed by alkaline chlorination, and that 9.5 mg/l cyanide will remain after chlorination. Analyses indicated a nickel concentration of 4,430 mg/l.

Analyses were performed on three mixtures (Mixture A, B, and C) of rinse water and bath I -

A m I 1 J S c m ~ . -*J -1, I p- : p m h

(43:l:l). Mixture B consisted of 44 parts rinse water and 1 part nickel bath (44:1:0), and Mixture C consisted of 44 parts rinse bath and 1 part 2-80 bath (44:O:l). Each of the three mixtures is representative of actual mixtures that would be obtained by adding one bath volume of either the nickel or the 2-80 bath, or both, to rinse water in the 9,000 gallon holding tank. The nickel and Z-80 baths contain roughly 150 gallons of solution, and the normal working volume of the holding tank is 6,750 gallons, or 75% of its total volume.

Analyses performed on Mixture A indicate a total cyanide concentration of 0.177 mg/l, and an amenable cyanide concentration of 0.00 mg/l. Therefore, there was no reduction in cyanide

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after chlorination of mixture A. Analyses performed on Mixture B indicate a total cyanide concentration of 0.203 mg/l, and an amenable cyanide concentration of 0.192 mg/l, representing a 95% reduction in cyanide after chlorination. Finally, analyses performed on Mixture C indicate a total cyanide concentration of 0.157 mg/l, and an amenable cyanide concentration of 0.152 mg/l, representing a 97% reduction in cyanide after chlorination.

Analyses were performed on the rinse water and on Mixture A to determine the effect of changes in duration of exposure to a chlorine residual upon cyanide destruction. For these tests, standard Method 335.1 tests, with a one hour chlorination period, and modified Method 335.1 tests, with a six hour chlorination period, were performed. Results indicated that changes in the duration of exposure to a chlorine residual had little or no effect upon cyanide destruction. Results from these analyses are summarized in Table 2.

The analytical results indicate that cyanide in the following solutions can be reduced to concentrations below 0.65 mg/l, the limit specified in the facility "DES permit, by alkaline chlorination:

0 rinse water 0 spent nickel bath solution 0

0

mixtures of 44 parts rinse water and 1 part nickel bath mixtures of 44 parts rinse water and 1 part 2-80 bath

It is unlikely that nickel-cyanide complexes are present in any of these solutions. The alkaline chlorination procedure currently utilized at the Scovill plant should be sufficient to reduce cyanide concentrations in these solutions to acceptable levels without process changes.

Results also indicate that cyanide in the following solutions can not be reduced to concentrations below that specified in the facility JYPDES permit by alkaline chlorination:

1

0 spent Z-80 bath solution 0 mixtures of 43 parts rinse water, 1 part nickel bath, and 1 part 2-80 bath

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It is possible that nickel-cyanide complexes are present in each of these solutions. Alkaline chlorination will be successful at destroying this cyanide only if the time or temperature at which the first stage is conducted is increased. Analyses indicated that a six hour chlorination period was not sufficient to treat the cyanide.

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Bath Ionic Concentrations and Rinse Water Chlorine Demand

The nickel and zinc concentrations of the nickel and Z-80 baths were used to determine the quantity of raw materials used to make up the solutions. Nickel bath solution is prepared by adding nickel chloride, in the form of NiCl, 6 H20, to water and muriatic acid (HC1). Analysis of the nickel bath solution indicated a nickel concentration of 38,100 mg/l. This equates to 1.3 pounds NiC12 0 6 H20 per gallon of bath solution.

Nickel is added to the Z-80 bath solution in the form of NiSO, 7 H20, a constituent of the Z - 80 crystals. Analysis of the Z-80 bath solution indicated a nickel concentration of 4,430 mg/l. This equates to 1.2 pounds of 2-80 crystals per gallon of bath solution.

Based on these raw material concentrations, the concentration of each known constituent of the raw materials was determined. These concentrations are summarized on Tables 3, 4, and 5 .

The concentration of the 2-80 bath solution in the rinse water was calculated based on the concentration of zinc in the rinse water. It is assumed that the only source of zinc in the rinse water is 2-80 bath solution. Analysis of samples of rinse water in the holding tank indicated a zinc concentration of 5.45 mg/l. The zinc concentration in the 2-80 bath was calculated to be 1600 mg/l. This indicates that the rinse water in the holding tank consists of 0.34% 2-80 bath solution.

The concentration of nickel bath solution in the rinse water was calculated based on the concentration of nickel in the rinse water. It is assumed ’that the only sources of nickel in the rinse water are the two bath solutions. Analysis of samples of rinse water in the holding tank indicated a nickel concentration of 114 mg/l. The 2-80 bath solution contributes 15 mg/l nickel to the rinse water. Based on a nickel concentration of 38,100 mg/l in the nickel bath, rinse water in the holding tank was found to contain 0.26% nickel bath solution.

Based on these concentrations of bath solutions in the rinse water, the concentrations of each ionic species known to be present in the rinse water were calculated. These concentrations are

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J S U M -

in these calculations.

Based on the concentrations of oxidizable ionic species in the rinse water, the amount of chlorine (as Cl,) required for complete oxidation was calculated. Oxidizable ionic species in the water are thiocyanate (SCN-), cyanide (CN-), ammonium (NH,+), and nickel (Ni2’). All other species known to be present are either in their highest oxidation state (ie. zinc (Zn”), sulfate (S042-), and borate (B(OH)4-)), or are not oxidizable by chlorine (ie. C1-). The concentration of cyanide measured in the rinse water was used for these calculations. The following assumptions were made in calculating the chlorine demand:

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0

0

0

SCN- is oxidized to S042-, C02, and N2. all NH4+ / NH3 remains in solution, and is oxidized to N2. Ni2+ is oxidized to Ni3+.

The resulting chlorine demand is 0.0108 lb C1, per gallon of rinse water. This equates to 86 Ib of Cl, per 8,000 gallon batch of rinse water. The chlorine demand of each of the ionic species is summarized in Table 7. Results from the chlorine demand calculations indicate that oxidation of thiocyanate consumes the majority of chlorine needed for complete oxidation of the rinse water.

Each of the assumptions used in the chlorine demand calculation is conservative, and should overpredict the amount of chlorine actually required. In particular, significant amounts of ammonia may volatilize during and after alkalization, resulting in a decreased concentration of ammonium requiring oxidation, and thus reducing the chlorine demand.

Possible Sources of Cyanide in Process Water

Cyanide was detected in the nickel bath solution at 3.71 mg/l in samples collected on June 30, 1995. The source of this cyanide is not known, but may be due to residue on the plating barrel.

Cyanide was detected in the 2-80 bath solution at 15.8 mg/l in samples collected on June 26, 1995, and at 11.8 mg/l in samples collected on June 30, 1995. One possible source of cyanide in the 2-80 bath is impurities in the raw material (2-80 crystals). Analysis of the Z-80 crystals indicated a cyanide concentration of 1.39 mg/kg. This would result in a cyanide concentration of 0.2 mg/l in the 2-80 bath solution based on a concentration of 1.2 lb 2-80 crystals per gallon. It can be seen that another source of cyanide must exist.

A second possible source of cyanide is the oxidation of thiocyanate in the 2-80 solution. Thiocyanate is known to be oxidizable to cyanide under acidic conditions in oxidative environments. Following is an example of the conversion of thiocyanate to cyanide in the presence of an oxidizing agent, hydrogen peroxide (H,O2): I

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SCN' + 3 H202 --+ SO4- + CN- + 2 H+ + 2 H20 (5)

The Z-80 bath solution is maintained at a pH of 5.5. The solution likely has a high dissolved oxygen concentration due to the nature of the plating operations. The solution is constantly agitated, and air is introduced directly into the solution when plating baskets are lower into the bath. Therefore, both acidic and oxidative conditions exist in the bath, and oxidation of thiocyanate to cyanide is possible. To attain the cyanide concentrations detected in the Z-80 bath solution, less than 0.1% of the thiocyanate present must be oxidized.

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Gases Potentially Generated During Alkaline Chlorination of Rinse Water

Due to the potential of cyanide-bearing solutions to generate toxic gases, care should be taken during storage, handling, or treatment of such solutions. The pH of all solutions known to contain cyanide should be maintained above 3 to avoid the formation of toxic hydrogen cyanide gas. This should not be a problem during treatment since a pH of 8 to 11 is maintained.

Two gases potentially generated during the alkaline chlorination of rinse water include cyanogen chloride and ammonia. As noted in equation (2) earlier in this report, cyanogen chloride is an intermediate product in the oxidation of cyanide. Cyanogen chloride is consumed rapidly in the presence of hypochlorite ions, reducing the likelyhood of generation of this gas in significant amounts. Ammonium present in the rinse water will be converted to ammonia during alkalization, and may be released as a gas upon agitation of the rinse water.

Caution should be used to protect against exposure to cyanogen chloride and ammonia gases. In particular, plant personnel should use appropriate personal protective equipment if they are required to perform work above the holding tank during alkalization or chlorination of the rinse water.

BIackening Process Wastewater Treatment Plan

Based on results from analyses performed as part of this project, ECA recommends that the alkaline chlorination process currently employed by Scovill be used to treat rinse water from the blackening process at the plant. Procedures and process parameters currently utilized should be maintained. Initial chlorination should be continued until a chlorine residual is achieved to ensure complete oxidation of cyanide and thiocyanate. 2-80 bath solution may be added to and successfully treated along with rinse water.

Due to the low pH of the nickel bath, there is a potential for generation of hydrogen cyanide gas when mixing this solution with cyanide-containing solutions. Based on this potential hazard, Scovill has elected not to treat nickel bath solution with rinse water. Scovill has placed spent

iJ 1- accordance with all applicable state and federal regulations and guidelines.

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Closure

Thank you for the opportunity to work with you on this project. If you have any questions about this report or the project in general, please call Mr. Ian Lundberg at (404) 667-2040, ext. 1219.

Sincerely yours, Environmental Corporation of America

Ian Lundberg, PE Project Manager Project Principal

Ralph Brown, PhD, PE

Appendix A Tables Appendix B Analytical Test Results

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APPENDIX A

TABLES

" - " indicates that this analysis

Mixtures are expressed as @arts

not performed on this sample

water : parts nickel bath : parts 2-80 bath)

Ta

2-80 CI

Constituent

NH4SCN NHKI

NiS04. 7H2( ZnS04.7H2(

B(OH)3

de 3: Concentration of 2-80 Bath Solution Constituents

stal mncentration = 1.24 ppg

M a x i " X Solution Concentration Molecular Concentration (as per MSDS)

30 0.354 42.41 76.13 0.557 30 0.354 42.41 53.50 0.793 15 0.177 21.21 280.90 0.075 5 0.059 7.07 287.58 0.025 25 0.295 35.34 83.46 0.423

(Ppg) (gm Weight (g/mol) (mol/l)

Table

lent

+

Ioni II constir Total Molecular Total

Concentration (molA) Weight (@mol) Concentration (mgA) 0.557 58.08 32,400 1.350 18.05 24.400

SCP NH4

c1. Ni

0.793 0.075

I Z r 1 35.45 28,100

58.70 4.430

SO4 1 - B(OH

4: Concentration of 2-80 Bath Solution Ionic Constituents

2- 4- I 0. 100 96.06 9,610

0.423 78.85 33.400

1

a 8

T

Element

I C12 consumed @pg)

ible 7: Chlorine Demand of Rinse Water Constituents

~ ~~ ~

Ni2+ so4 2- CO2 N2 N2 Ni 3+ I SCN- SCN- SCN- NH4+

0 0 -1 -3 +2 +6 +4 0 0 6 4 1 3 1

/l) 0.00189 0.00189 0.00189 0.00459 0.00194 ‘1) 0.01136 0.00758 0.00189 0.0 1377 0.00194 0.0365

1.296 0.0183 I 0.00568 0.00379 0.00095 0.00688 O.oo(wI

0.40288 0.26859 0.06715 0.48809 0.06893 I I t t _ _ - -

I 0.00336 I 0.00224 I 0.00056 I 0.00407 I 0.00057 I 0.0108

1 1 I I I I I I I I I I

APPENDIX B

ANALYTICAL TEST RESULTS

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ACL ADYANCED CHEMISTRY LABS, XNC P,Oq BOX 88610 ATLANTA, QEORGIA 30356 PHONE (404) 409-1444 FAX (404) 409-1844

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ACL

1~ 1 ADVANCED CHEMISTRY LABS, IN%.

PO. BOX 88610 ATLANTA, GEORGIA 30356 PHONE (404) 409-1444 FAX (404) 409-1844

Scovi l l Fasteners Client: Environmental Corp of America Client Project No.: 5-612-1

:1 1 1 1 1 Alderman D r i v e Sui te 200 Alpharetta, CA 30202-4143

ACL Project No.: 18858 Date Received: 06-30-95

Attention: M r . Ian Lundberg Report Date: 07-07 - 95 n -1 Station:

ACL #:

] Date Sampled:

Mat r ix : :I - Analysis (Method )

-1 Amenable Cyanide (335.1) Total Cyanide (335.2 1 Chromium (6010)

Copper (601 0

Nickel (6010) Zinc (6010)

Hold inq Tank 971 1 1

06 - 30- 95

Liquid

Results

0.22 0.26 0.50 0.56

114 5.45

Date of *PQL Un i t s Analysis Ana lys t

0.02 mg / l i t e r 07-06-95 SK

0.02 mg/ l i t e r 07-06-95 SK

0.02 m g l l i t e r 07-05-95 CP

0.02 mg/ l i t e r 07-05-95 CP

0.10 mg/ l i t e r 07-05-95 CP

0.02 mg / l i t e r 07-05-95 CP

T i t ra t i on 8pH of 10.5

T i t ra t i on @pH of 11.0

r e q u i r e d 0.0111 Moles of NaOH per l i t e r of sample.

requ i red 0.0124 Moles of NaOH p e r l i t e r of sample.

d "PQL = Practical Quant i ta t ion Limit. gfJ@&;/* John H. Andros (1 QNQC Manager

1 ACL

. .I r 1 ADVANCED CHEMISTRY LABS, INC

._ 1 PO. BOX 88610 ATLANTA, GEORGIA 30356 PHONE (404) 409-1444 FAX (404) 409-1844

Scovill Fasteners Client: Environmental Corp of America Client Project No.: 5-612-1

7 n 1111 Alderman Dr ive

Suite 200 Alpharetta, GA 30202-4143

ACL Project No.: 18858

Date Received: 06-30-95

7 Attention: M r . Ian Lundberg Report Date: 07-07-95

'7 Station : ACL # : . I

3 Date Sampled:

Matrix : 3 ' Analysis (Method)

2-80 Bath 971 12

06-30-95

Liquid

Date o f Results *PQL Units Analysis Analyst

1 Amenable Cyanide (335.1 2.30 0.02 mg/liter 07-06-95 SK

Total Cyanide (335.2 11.8 0.02 mg/liter 07-06-95 SK

4430 0.10 mg/l i ter 07-05-95 CP '1 Nickel (6010)

< .

"PQL = Practical Quantitation Limit.

3 a

3

1 PO. BOX 88610 ATLANTA, GEORGIA 30356 PHONE (404) 409-1444 FAX (404) 409-1844

ACL ADVANCED CHEMISTRY LABS, IN%.

Scov i I I Fast en e r s Client: Environmental Corp of America Client Project No.: 5-612-1

1111 Alderman Dr ive ACL Project No.: 18858 Suite 200 Alpharetta, GA 30202-4143 Date Received: 06-30-95

n Attention: M r . Ian Lundberg Report Date: 07-07-95

'7

.. J Station: ACL # :

Ni Bath 971 13

. J Date Sampled: 06-30-95

Matrix : Liquid n Date of n Analysis (Method 1 Resu I ts "PQL Units Analysis Analyst

1 Amenable Cyanide (335.1 3.63 0.02 mg/liter 07-06-95 SK

Total Cyanide (335.2 3.71 0.02 mg/l i ter 07-06-95 SK

38 100 0.10 mg/l i ter 07-05-95 CP 1 Nickel (6010)

I L J

I.

*PQL = Practical Quantitation Limit. :1

a

I I ADVANCED CHEMISTRY LABS, IN%. P.O. BOX 88610 ATLANTA, GEORGIA 30356 PHONE (404) 409-1444 FAX (404) 409-1844

Client: Environmental Corp. o f America Client Project NO.: Scovi l l Fasteners

1111 Alderman D r i v e Sui te 200 Alpharetta, GA 30202-4143

ACL Project No.: 18890

Date Received: 07-10-95

Attention: M r . Ian Lundberg Report Date: 07- 14-95

Modif ied Total Amenable Amenable Cyanide Cyanide Cyanide

Station ACL # ( mq/ I i t e r 1 ( mq/ I i t e r 1 ( mq/ I i t e r 1

Solution A 97217,

Solut ion B 97218,

Solut ion C 97217,

Rinse Water 97219

*** No determinable

**** 18,19 0.177

19 0.203

19 0.157

----

0.031 ----

**** 0.192

0.152

0.025

quant i t ies of. cyanide amenable to ch lor inat ion.

Solut ion B: 1 p a r t 2-80 Solut ion A: 1 p a r t Z-80

1 p a r t N i B a t h 44 p a r t s Rinse Water

1 43 p a r t s Rinse Water d

Solution C: 1 p a r t N i B a t h

44 pa r t s Rinse Water

// QNQC Manage1

1 I ACL I ADUNCED CHEMISTRY LABS, IN%.

1 PO. BOX 88610 ATLANTA, GEORGIA 30356 PHONE (404) 409-1444 FAX (404) 409-1844

Client: Environmental Corp. of America Client Project No.: ScoviII Fasteners 7 n 1111 Alderman Dr ive ACL Project No.: 18890

Suite 200 Alpharetta, CA 30202-4143 Date Received: 07-10-95

Attention: M r . Ian Lundberg Report Date: 07-14-95

Total Nickel Station ACL # Matrix (601 0 ) (mg/ l i te r )

Solution A 97217,18,19 Liquid 1100

Solution B 97218,19 Liquid 295

Solution C 97217,19 Liquid 1170

Rinse Water 972 19 Liquid 330

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Dale /Tiiiie Received by: I I Relinquished by:

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I :- Iced Oiily P = Preserved

( , 'OOlCl. 'relllp:

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treatment investigation: removal of cyanide from for ... · the blackening process, metal parts are...

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