Soilworks products are the industry’s top standard due to our insistence on creating high performance soil stabilization and dust control products that stand up to rigorous testing – both in the lab and in the field. Our commitment to quality and performance has led to our involvement and testing in hundreds of real-world situations. The following library of reports, presentations, specifications, approvals and other similar documents provide you, our customer, the transparency and dependable assurance that is expected from Soilworks.
Environmental performance of soil stabilization products is evaluated through controlled aquatic toxicity testing to support use in sensitive environments near surface waters. Acute exposure testing using rainbow trout demonstrates that polymer-based soil stabilization can meet stringent environmental safety expectations when applied for dust control and erosion prevention. The study focuses on waterborne exposure scenarios relevant to construction sites, unpaved roads, and soil stabilization projects where runoff management and environmental compliance are critical considerations.
Polymer soil stabilization solutions that reduce fugitive dust and erosion also help protect adjacent waterways by minimizing sediment transport and airborne particulate migration. Soiltac, a copolymer emulsion soil stabilizer, supports dust control and soil stabilization applications where environmental compatibility is required alongside performance. By binding soil particles and reducing surface disturbance, polymer stabilization helps limit off-site impacts while maintaining stable, traffic-resistant surfaces. For projects requiring extended dust suppression without repeated watering, Durasoil provides long-lasting control through soil conditioning that reduces erosion potential and particulate movement. In environmentally sensitive construction zones, infrastructure corridors, mining operations, and access roads near aquatic resources, Soilworks solutions offer effective dust control and soil stabilization while supporting environmental stewardship goals. Contact Soilworks to identify site-appropriate solutions that balance performance, durability, and environmental considerations.
Consulting • Engineering • Remediation
December 15, 2003
4303 West LaPorte Avenue Fort Collins, CO 80521
(970) 416-0916
FAX (970) 493-8935
Rick Amalfi
Aquatic Consulting and Testing, Inc.
1525 W. University Drive, Suite 106
Tempe, AZ 85281
RE: Results of Soiltac®toxicity testing – rainbow trout ENSR Project Number 8503-120-040-001
Dear Rick:
Enclosed is the report on the 96-h acute toxicity of Soiltac®to rainbow trout. Acute toxicity was not observed during this test and the 96-h LC50 was > 1000 mg/L.
Please contact me if you have any questions or comments on these results or the report in general.
Sincerely,
Gail Dethloff, PhD Senior Ecotoxicologist
enclosures:
SOILWORKS®
Report of Toxicity Testing using Rainbow Trout (Oncorhynchus mykiss)
Project ID: 08503-120-040-001
December 2003
| Sponsor | Aquatic Consulting and Testing
1525 West University Drive, Suite 106 Tempe, AZ 85281 |
| Project Officer | Rick Amalfi (480) 921-8044 |
|
Testing Facility |
ENSR Corporation
Fort Collins Environmental Toxicology Laboratory 4303 West LaPorte Ave. Fort Collins, CO 80521 Fax: (970) 490-2963 |
| Study Director | Gail Dethloff (970) 416-0916 email: gdethloff(a),ensr.com |
| Test | Acute Toxicity under Static-Renewal Conditions |
| Basis | USEPA (2002), method 2019.0 |
| Test Dates and Time | December 8, 2003 @ 1300 to December 12, 2003 @ 1130 |
| Test Length | 96 hours |
| Species | Oncorhynchus mykiss |
| Test Material | Soiltac1111 |
| Outfall | NA |
| Permit Number | NA |
| Receiving Stream | NA |
| Dilution Water | Moderately Hard Reconstituted Water |
| Concurrent Control Water | None |
| Test Concentrations | 0 (control), 125, 250, 500, 750, and 1000 mg/L |
|
Sample No. |
Field No. |
Collection Date & Time |
ENSRNo. | Date of Receipt | Temp. at
Arrival (OC) |
| 1 | Not Applicable | NA | 17169 | 11/12/03 | 23 |
| Batch No. | pH | Hard. (mg/L)• | Alk. (mg/Lt | Spec. Cond.
(µSiem} |
TRCU
(mg/L) |
NH3-N
(mg/L) |
| 6532 | 8.2 | 84 | 60 | 305 | <0.05 | <1.0 |
a As CaC03
b Total residual chlorine
| Type | Static-Renewal Acute |
| Test Endpoints | Survival |
| Test Chambers | 10-L glass aquaria |
| Test Solution Volume | 4L |
| Replicates per Treatment | 2 |
| Organisms per Replicate | 10 |
| Test Temperature | 12 ± 1°c |
| Loading (g/L) | 0.177 |
| Lighting | Fluorescent, 16 hours light:8 hours dark |
| Chamber Placement | Random according to computer-generated chart |
| Aeration | None |
| Test Solution Renewal | At 48 hours |
| Species | Oncorhynchus mykiss |
| Age | 23 days post swim-up |
| Standard Length | Mean: 21.7 mm; Range: 19 to 24 mm |
| Weight | Mean: 0.0709 g; Range: 0.0357 to 0.1154 g |
| Source | Lost River Trout Farm; FCETL lot 03-063 |
| Acclimation | Test temperature and dilution water |
| Feeding | None during the 24 hours preceding test initiation and
none during the test |
| Reference Toxicant Testing | Initiated December 10, 2003 using sodium chloride (NaCl) |
Page 2
TEST RESULTS
| Test Concentration (mg Solltac®/L) | Percent Survival of Oncorhynchus mykiss | |||
| 24 hours* | 48 hours | 72 hours* | 96 hours | |
| 0 (Control) | 100 | 100 | 100 | 100 |
| 125 | 100 | 100 | 100 | 100 |
| 250 | 100 | 100 | 100 | 100 |
| 500 | 95 | 85 | ||
| 750 | 100 | 90 | ||
| 1000 | 95 | 90 | ||
| Control Performance | Acceptable | |||
Due to difficulties observing the organisms and concerns about stressing the organisms, counts in some treatments were only conducted at renewal (48 h) and takedown (96 h)
| Biological Endpoint | Comparison | Procedure |
| Survival | Median Lethal Concentration (96-Hour LC50) | Inspection |
| Biological Endpoint | Statistical Endpoint | Value (mg Soiltac®/L) |
| Survival | 96-Hour LCso | >1000 |
Page 3
|
Treatment (mg Soiltac®/L) |
pH | Dissolved Oxvaen (mg/L) | Conductivity luS/cm) | Temperature
(DC) |
||||
| Low | High | Low | High | Low | High | Low | High | |
| 0 (Control) | 7.4 | 8.2 | 6.8 | 10.2 | 295 | 305 | 12 | 13 |
| 1000 | 7.4 | 8:1 | 6.8 | 9.4 | 299 | 309 | 12 | 13 |
|
All Treatments |
7.4 |
8.2 |
�.7a |
NA | 12b | 13b | ||
| 12.2c | 13.0c | |||||||
| Performance | NA | Acceptable | NA | Acceptable | ||||
a Low DO of 6.7 mg/L 1s 75% saturation at 5,200 feet above sea level
b Temperature in test solutions
c Continuous wet temperature in the water bath
| 96-Hour LCso | ENSR/FCETL Historical 95% Control Limits | ||
| Low | I | High | |
| 6587 | 4941 | I | 9794 |
Note: Values are expressed as mg/L of chloride.
Deviations from Test Basis (Method 2019.0)
To the best of the Study Director’s knowledge, one deviation from the test method 2019.0 occurred during the study. The test was terminated 0.5 h earlier than the 96 ± 1 h duration. This was not expected to affect the outcome of the study.
References
USEPA. 2002. Methods for measuring the acute toxicity of effluents and receiving waters to freshwater and marine organisms. Fifth Edition, EPA-821-R-02-012.
Page 4
Statement of Procedural Compliance
I certify that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge, accurate and complete.
Gail Dethloff Study Director
Statement of Quality Assurance
The test data were reviewed by the Quality Assurance Unit to assure that the study was performed in accordance with the protocol and standard operating procedures. This report is an accurate reflection of the raw data.
Quality Assurance Unit
Date
Page 5
