SOLICITATION NOTICE
B -- Air Quality Study at Scout Lake
- Notice Date
- 4/15/2004
- Notice Type
- Solicitation Notice
- NAICS
- 541620
— Environmental Consulting Services
- Contracting Office
- Department of Agriculture, Forest Service, R-6 Northwest Oregon Contracting Area (NOCA), 16400 Champion Way, Sandy, OR, 97055
- ZIP Code
- 97055
- Solicitation Number
- R6-27-04-058
- Response Due
- 6/3/2004
- Archive Date
- 6/18/2004
- Point of Contact
- Erina Goff, Procurement Technician, Phone (503) 668-1636, Fax (503) 668-1763, - Janet Hunt, Lead Procurement Assistant, Phone (503) 668-1617, Fax (503) 668-1763,
- E-Mail Address
-
egoff@fs.fed.us, jmhunt@fs.fed.us
- Description
- Air quality study of Scout Lake, Oregon in the Mt. Jefferson Wilderness. The purpose of the proposed project is to fill the need for establishing a long-term monitoring site in a sensitive region of the US Forest Service. One base year plus 4 option years will be awarded under the resultant contract. The lake selected for monitoring is located in a Class I air quality region and is chemically highly sensitive to potential damage from atmospheric inputs. The intent of the monitoring program is to provide a complete characterization of the lake, to monitor the chemical and biological components of the lake, and to monitor precipitation inputs. Included will be a five-year program to complete the site characterization and begin the long-term monitoring. The program could be structured to complete the site characterization in the first year or the costs could be distributed across a three-to-fiver year period depending on funding availability. The proposed study site is Scout Lake located in the Mt. Jefferson Wilderness in the Oregon Cascades (Figure 1). Scout Lake has been sampled once each in 1999, 2001, and 2002 (Eilers 2002). The lake is extremely dilute, which makes it an ideal natural monitoring site. We propose to monitor the lake either two or three times per year depending on availability of funds. The site would be instrumented with a pressure transducer (Solinst) to record changes in lake stage, a barometric pressure recorder (to correct for unvented pressure), a string of thermisters (Onset Tidbits), a submerged light-intensity logger (Onset). Two groundwater observation wells would be hand-augured adjacent to the lake and fitted with a 2-inch PVC liner and a pressure transducer to record changes in groundwater head adjacent to the lake. A climate station (Onset weather station) would be established near the site to record air temperature, relative humidity, wind speed (gust and average), wind direction, barometric pressure, precipitation, and photosynthetically active radiation (PAR). Averaging period for the climate station will be set at 15 minute intervals. A bulk precipitation device will also be attached to the instrument mast to collect precipitation from spring to fall. The majority of the precipitation to this site occurs during the winter. Accumulated snowfall will be collected in late March by digging a snowpit and collecting an uncontaminated sample from the vertical wall in the pit or by coring through the snow with a polycarbonate tube. Lake sampling will consist of collecting a vertical profile of in-situ water quality (temperature, pH, conductivity, dissolved oxygen, depth, and ORP) with a YSI 600 XLM monitoring probe. Water samples will be collected from the epilimnion and hypolimnion (if stratified) using a polycarbonate Van Dorn bottle or from the surface only if the lake is homothermic. Samples will be placed in new Nalgene? containers, pre-soaked in lake water prior to use. All precipitation, snow, and lake water samples will be analyzed for major ions (Ca, Mg, Na, K, Cl, NO3, SO4, HCO3, pH) and nutrients (TKN, NO3, NH3, Si, TP, PO4) at the USDA Forest Service Range and Experiment Station (ions) in Fort Collin, CO and the USDA Forest Sciences Laboratory (nutrients) in Corvallis, OR. Routine samples will be interspersed with DIW blanks, duplicates, and spikes to provide a quantitative assessment of the sampling and analytical uncertainty. Samples will be placed on snow if available, but in all cases will be transported out of the wilderness on the same day of collection and shipped to the laboratory on the following day (or frozen for later analysis). Zooplankton samples will be collected from the lake by lowering and retieving a 9m vertical tow using a 64 ? mesh net with a 20 cm opening, a reduction collar, and a modified Wisconsin bucket. The zooplankton samples will be preserved in alcohol and shipped to ZP Taxonomic for analysis by Dr. Allan Vogel. Phytoplankton samples will be preserved with Lugol?s solution and shipped to Aquatic Analysts for analysis by Mr. James Sweet. Benthic samples will be collected using a petite PONAR dredge, placed through a #30 mesh sieve (~580 microns) and shipped to ABR Scientific for analysis of invertebrates to the lowest practical taxonomic unit. Benthic samples will be stratified into littoral and pelagic zones and pooled into these strata for analysis. The lake bathymetry is needed for all calculations involving atmospheric loading, water budgets, and water quality modeling. The lake bathymetry will be measured using a portable hydroacoustic unit linked to a Sokkia DGPS WAAS receiver. At this site, we expect the precision to be within 1-2 meters, which will be more than adequate for the intended purpose. The raw data will be screened for consistency and entered into Surfer software for creation of the lake representation using a kriging routine. Accuracy of the map will be verified with cross-tracks over the same location and using manual soundings. The map will be set into the landscape using the USGS 10m DEM for the area. The historical conditions in the lake will be determined by collecting a sediment core and analyzing specific properties of the core. The coring device most appropriate for sampling Scout Lake is a 5 cm piston corer equipped with polycarbonate core tubes. The core tube will be lowered into the sediments until resistance prevents further movement. The resulting core will be inspected at the lake for possible discontinuities or other irregularities that would suggest some type of disturbance. A satisfactory core will be sectioned on-site in 1-cm intervals. The sediment will be stored in WhilrPac? bags and refrigerated until they are distributed among the various laboratories. The sediment will be analyzed for percent water, P, N, and diatoms. The dating of the sediment can be done using either 14C or 210Pb (or both) depending on the specific objectives. 14C has a long half-life ( 5730 yr) which makes it suitable for estimating long-term rates of sediment accumulation. The advantage of this isotope is that it allows the user to develop accurate long-term ages and average rates of sediment accumulation. The disadvantage of 14C is that the short-term resolution of the technique is poor, which means that any possible recent (eg. Last century) changes in SAR cannot be determined. The half-life of 210Pb is 21 yr, which allows us to provide accurate reconstruction of the last 100 to 130 years. The level of dating would be suitable to confirm (or refute) issues associated with recent anthropogenic disturbance of the study site. Following dating of the core (at whatever level of specificity is chosen), the sediment will be analyzed for fossil diatoms, C, N, 15N, and P. The analytical analyses will be conducted at the Oregon State University Soil Science Laboratory in Corvallis. The diatom stratigraphy will be determined by Dr. Katrina Moser, University of Utah. Results from the project will be entered into an Access? database for long-term storage and retrieval of the data. This is a small business set-aside. The solicitation and drawings will be available for downloading at this site, www.fedbizops.gov on or about May 3, 2004. The Contracting Officer for this project is David Hallen, 503-668-1667. The NAICS is 541620.
- Place of Performance
- Address: Mt. Jefferson Wilderness, Willamette National Forest, 211 E. 7th Avenue, P.O. Box 10607, Eugene, Oregon
- Zip Code: 97440
- Zip Code: 97440
- Record
- SN00566385-W 20040417/040415211708 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
(may not be valid after Archive Date)
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