Field Sampling. 1. Quality assurance testing and sampling of the slurry seal mixture will be performed by the County of Orange OC Public Works Materials Laboratory, which shall include all the components necessary and required in the laboratory approved mix design.
2. The testing and sampling shall be performed by the County of Orange OC Public Works Materials Laboratory. The Engineer may, at any time during the project, suspend work in order to verify or interpret test results.
3. During the performance of the work, the Contractor shall arrange for taking at least 2 field samples of the mixed slurry per slurry truck, per day, for the purpose of wet track abrasion tests.
4. The slurry seal mixture sample shall be taken from the slurry truck by a qualified technician from the approved material testing laboratory.
5. Test results for the slurry seal mixture used during the course of the job will be based on random samples taken from the slurry seal truck at the time the material is being placed. These test results shall comply to the requirements of the wet track abrasion test, ASTM D3910, this Scope of Work, and the following values: Test Test Method Requirement Minimum Maximum Wet Track Abrasion (weight loss in grams per square foot) ASTM D3910 0 75 Consistency (CMS) ASTM D3910 20 30 Extraction Test (emulsion content, percentage) ASTM D2172 + 1.0 Percent of mix design Water Content (percentage of dry aggregate weight) ASTM D2172 --- 25
6. The slurry mixture sampled shall be of aggregate, asphalt emulsion, water, and additives, and shall be mixed in the slurry truck mixer and spreader or pre-mixed from the plant. It shall reflect the same slurry produced in the approved mix design and shall be prepared to a homogeneous flowing consistency and shall meet the requirements of the consistency test.
7. The slurry seal mixture sample taken from the slurry truck shall be formed into a disk by pouring it in the circular opening of a poly (methyl) methacrylate (PMMA) template resting on a larger circlet of roofing felt.
8. The method for testing shall follow ASTM D3910, as follows: After removal of the template, the disk-shaped specimen is dried to constant weight at 140°F. The cured slurry is placed in a water bath for one hour, then mechanically abraded under water with a rubber hose for 5 minutes. The abraded specimen is washed free of debris, dried at 140°F and weighed. The loss in weight expressed as grams per square foot is reported as the wear value (WTAT loss).
9. For conti...
Field Sampling. Provide additional production material to allow freshly mixed elastomeric concrete to be sampled for acceptance. A minimum of six 2 inch cube molds and three 3x6 inch cylinders will be taken by the Department for each day’s production. Compression, splitting tensile, and durometer hardness testing will be performed by the Department to determine acceptance. Materials failing to meet the requirements listed above are subject to removal and replacement at no cost to the Department.
Field Sampling. ACE agrees to field sample effluent samples for PH, Temperature, DO, Turbidity and Chlorine Residual. All meters to be in good working order and calibrated per manufactures requirements.
Field Sampling. ACTIVITY
Field Sampling. The primary data collection consisted of soil sampling throughout the North Birmingham, Alabama neighborhood to include residential and non-residential lots. Field sampling was completed in a single day in cloudy conditions and consisted of a grab sampling method of surface soil. Random sampling points were generated using ArcMap, a geospatial software. If sampling point was inaccessible, samples were collected less than 0.5 miles from plotted points. All primary data was collected by the researcher. For comparative means, secondary data originated from the Environmental Protection Agency. To obtain the data, a Freedom of Information Act (FOIA) request was made for soil analysis of heavy metals of neighborhoods in the 35th Avenue Superfund Site. To reduce bias, the request emphasized specification on randomization of site data—thereby avoiding gathering information about the most or least polluted sites. The method of soil sampling used by the EPA differs from methods used in primary data collection of the North Birmingham neighborhood. The EPA utilized a composite retrieval method in addition to grab methods (US EPA, 2023). Xxxxx’s IRB approval was not sought as this research design did not include human subjects. To reduce bias in sampling collection, random sampling points were plotted using ArcMap. Prior to storing samples, an x-ray fluorescent (XRF) analysis was performed on the batch of plastic bags to prevent any confounding, as studies have shown that heavy metals have been found to xxxxx into the bags (Alam et al., 2019). XRF is an x-ray device that provides elemental analysis of heavy metals and metalloids (HMM) in geological samples (Ask A Scientist Staff, 2020). Once the sampling was complete, samples were transported to an environmental sciences lab in Atlanta, GA and stored in a chemical fume hood until analyzed using XRF. Soil samples from North Birmingham were dried using a laboratory oven at 250° Celsius in aluminum pans and analyzed for As and Pb levels using XRF (N=15). Solid materials in samples were removed prior to analysis. Secondary samples from the EPA were also analyzed using an XRF device (N=16). Data from both sources were assembled into a single dataset and divided into two groups; Superfund and Non-Superfund. The Superfund group consisted of the three neighborhoods in the 35th Avenue Superfund Site (Collegeville, Fairmont, and Xxxxxxxx Park) while the non-Superfund group is the North Birmingham neighborhood.
Field Sampling. Three separate site visits were made to the Project area by the study coordinator and a Mi’Kmaq Ecological Knowledge holder from Membertou. This facilitated both an appreciation of where development would possibly occur and provided the opportunity to identify specific plant species of particular value to the Mi’Kmaq that might be located within the study area. The findings of this work are discussed in Sections 4.5.5 and the entire Mi’Kmaq Ecological Knowledge Study is provided in Appendix I.
Field Sampling. The study was conducted during the first rainy season peak in July 2012. Water samples were collected over a two-day period, July 9th and July 10th. Using Amber borosilicate glass containers with PTFE-lined tops, a total of 8 samples were collected from the Solous I site and 6 samples from the Olushosun site. Samples were collected from xxxxx and boreholes in labeled vials and the temperature of the water samples was recorded on site using a thermometer. Solous I samples were labeled S1- S8 and Olushosun samples were labeled O1-O6. In addition, the GPS coordinate of each sampling point was recorded as well as the distance from the dumpsite. Samples were then stored in a refrigerator at 4°C for a maximum of 10 days until analysis.
Field Sampling surveying
2.01 Sampling/Survey guidelines
2.02 Short description
2.03 Method to select the sampling/survey site or area: Stratified sampling/surveying
2.04 Sampling/survey device: n.a.
Field Sampling. Humpback Chub sampling in Westwater Canyon occurred in September and October of 2011 and 2012. Three eight-day sampling passes were conducted each year. Approximately six days elapsed between the end of one pass and the beginning of the subsequent pass in 2011, and approximately seven days elapsed between passes in 2012. During each pass, Miners Cabin, Upper Cougar Bar, and Lower Cougar Bar (Figure 1) were sampled for two nights and Hades Bar was sampled for one night. The Hades Bar site was not sampled on the third sampling trip of 2011 and 2012. This was due to motor issues and inclement weather. Multi-filament xxxxxxx nets (23 m x 2 m; 2.5 cm mesh) and a motorized/oar electrofishing (ETS Electrofishing) Cataraft were used to collect fish. Hoop nets were utilized intermittently in 2003 and 2004, but were not used during sampling in 2007–2012. Xxxxxxx nets were set in mid-afternoon and checked every 1.5-2 hours until approximately midnight, at which time they were pulled. Nets were reset before sunrise and allowed to fish until approximately noon, while being checked at similar time intervals as evening sets. Xxxxxxx nets were set to target adult Humpback Chub in deep eddies off boulder or rock faces. Nets were occasionally also set in shallow xxxxxx/run habitat. All chub were removed from the net, processed in camp, and released. Due to this protocol, a few chub were recaptured during the same 18-hour sampling period. Electrofishing was conducted during each pass in 2011 and 2012. In 2003 and 2004, only a single electrofishing pass was conducted. Single pass electrofishing was previously established under the ISMP protocol. Increased electrofishing was conducted beginning in 2005 to increase the catch of juvenile and sub-adult chubs and strengthen population estimates. The majority of electrofishing occurred at the three upstream-most sites. Electrofishing effort was limited at Hades Bar because of the short sampling distance (0.2 river miles). Shoreline habitats were electrofished within each site. Electrofishing occurred prior to xxxxxxx nets being set and subsequent to nets being pulled. All adult Humpback Chub and Roundtail Chub collected during electrofishing were used in their respective population estimates. Electrofishing data were also used in determining catch rates, length-frequency analysis, and movement of chub in Westwater Canyon. Chub were identified to species using a suite of diagnostic qualitative characters (i.e., degree of frontal dep...
Field Sampling. Purple Xxxxxx nests will be monitored for activity and 1 egg will be removed from each of up to 10 nests per colony. Eggs will immediately be placed in well-padded, labeled polyethylene bags, and stored in fiber eggs cartons in a cooler on wet ice until return to the laboratory. Once in the laboratory, eggs will be stored in a refrigerator until dissection within 30 days of sampling. Once transferred to the lab each egg will be measured prior to dissection. The contents of each egg will be removed remove and examined for viability, incubation stage, and malformations of any embryos. Each egg sample will be dried and homogenized to a fine powder in an analytical mill. Dried samples will be stored in dark desiccators until analysis. Each sample will be analyzed for total mercury concentration at the USGS Pacific Northwest Environmental Mercury Laboratory in Corvallis, Oregon. Mercury will be determined via thermal decomposition coupled with atomic absorption spectroscopy, following EPA method 7473. Prior to analysis, the equipment will be calibrated using NIST-certified standard solutions.
