Ground Water
Ground water resources are increasingly important for a growing worldwide population. Monitoring systems for water quality and level help you manage this source of drinking water and irrigation.
Goal: Ground Water Remediation & Sampling
Organization: Environmental consultant
Location: New Jersey
Challenge: Using EPA-standard low-flow purging technique to collect samples of ground water at sites contaminated with volatile organic compounds (VOCs), metals, and semi-VOCs. Need fast and accurate data collection at multiple sites.
Solution: Slender, accurate YSI sondes measure dissolved oxygen, temperature, conductivity, and other parameters and are compatible with low-flow purging requirement.
Dollars and $ense:
The YSI sonde is portable and rugged for repeated transport and set up. Additionally, the instrument calibration was fast and battery power robust to allow multiple technicians to sample multiple sites in single day.
Goal: Ground Water Remediation & Monitoring
Organization: Environmental consultant
Location: New Jersey
Challenge: Using an air-sparging technique (shown) to clean a site where ground water and soil are contaminated with semi-volatile aromatic hydrocarbons. Need to accurately monitor high oxygen demand levels in order to inject oxygen efficiently to maximize the microbial remediation.
Solution: Easy-to-use YSI sondes measure dissolved oxygen levels down well around the site. The consultant can target areas of the site with highest contamination during this 3+ year remediation project.
Dollars and $ense:
The cost of 1 YSI 600LS water quality sonde is less expensive than the cost of supply of oxygen and electricity for air sparging, much of it wasted if active remediation sites were not monitored for oxygen demand.
Goal: Conjunctive Management of Ground and Surface Waters
Organization: Miami Conservancy District
Location: Ohio
Challenge: To measure and understand the interaction between ground water and base-fed rivers, particularly the migration of high levels of nutrients from ground to surface water.
Solution: Use a portable YSI ProPlus meter with nitrate sensor to screen wells to determine which "hot spots" will require sampling and lab analysis.
Dollars and $ense:
Baseline readings of nitrate above 5 mg/L give a reliable indication of where to grab samples, reducing the total number of samples needed.
In one well-testing program, the savings realized by reducing the number of lab samples to 8 from 33 more than paid for the cost of the ProPlus instrument.
