66 -- SUBMERSIBLE WATER-QUALITY INSTRUMENT

Notice Date

July 19, 2001

Contracting Office

Department of the Interior, U.S. Geological Survey, 345 Middlefield Road,Mail Stop 285, Menlo Park, CA 94025-3591

ZIP Code

94025-3591

Solicitation Number

01-4387-1121

Response Due

July 30, 2001

Point of Contact

ann margrave (650)329-4132

E-Mail Address

amargrave@usgs.gov (amargrave@usgs.gov)

Description

The U.S. Geological Survey intends to negotiate on a sole source basis with Sea-Bird Electronics, 1808-136th Place N.E., Bellevue, Washington 98005, under the authority 6.302.1. The proposed contract is for a submersible instrument package to measure and record on PC high resolution vertical profiles of: conductivity, temperature, salinity, depth, chlorophyll fluorescence, turbidity, and light penetration in San Francisco Bay and its tributary rivers. The selected instrument is a Sea-Bird 911 CTD system which, includes the following attachments: Aluminum housing, 6800 meter depth rating; 0-10,000 psia (6,800 meters) pressure sensor; SBE 43 Dissolved oxygen Sensor, 7000 meter; Turner SCUFA II Fluorometer with Turbidity; Fluorometer mounting hardware kit; Null SCUFA II interface cable; Biospherical QSP-200L (4pi) PAR (log amp); Biopherical Inst. QSP-200L mounting hardware kit and Biospherical QSP-200L, cable, 84cm (DN 30701). The U.S. Geological Survey (USGS) maintains a program of regular water-quality measurement in San Francisco Bay and its tributary river system as part of monitoring and research programs supported both by the USGS and other agencies. These programs include the USGS Place Base Program and Toxic Substances hydrology Program and a collaborative contribution to the San Francisco Regional Monitoring Program in cooperation with the San Francisco Estuary Institute (SFEI), Regional Water Quality Control Board (RWQCB), and local dischargers. This commitment of the USGS requires submersible instrumentation, based on a Sea-Bird Electronics SB/11 CTD. This is a replacement of existing instrumentation: (1) for compatibility with existing instruments, and (2) to meet the following requirements: Accurate and stable modular Conductivity and Temperature sensors. Paroscientific Digiquartz pressure sensor. TC-Ducted Flow and pump-controlled time responses. 24 Hz all-channel scan rate. Built-in interfacing for dual C & T sensors. 8 built-in 12 bit A/D channels for auxiliary sensors. Windows-based software for data acquisition and storage on interfaced PC. RS-232 data interface and cable and an IEEE-488 data interface. Switch-selectable 115/230 VAC operation. LED readout for raw CTD underwater data. Power available for auxiliary sensors: 1 amp at + 14.2 volts. Continuous polarization of dissolved oxygen electrode. On-board temperature compensation of dissolved oxygen electrode. Fully functional at salinities from fresh water (0.1 psu) to seawater (35 psu). Fully integrated with Turner Designs SCUFAII. Fully integrated with LiCor PAR Quantum sensor. It is imperative that we purchase a Sea-Bird 911 CTD system to maintain exact consistency of methodology between USGS, SFEI and its contractors, the California Department of Water Resources, and the USGS California District office. Each of these agencies uses a Sea-Bird 911 CTD system to measure salinity, temperature, dissolved oxygen, depth, conductivity, and turbidity. THIS NOTICE IS FOR INFORMATIONAL PURPOSES ONLY. THIS IS NOT A REQUEST FOR COMPETITIVE PROPOSALS. Point of contact: A. Margrave (650)329-4132.

Record

Loren Data Corp. 20010723/66SOL009.HTM (W-200 SN50S463)