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Aquifer Cleanup - , ontinued from page 37 aquifer applications. You also must determine agency con- elevated rates of in situ biodegradation of Any consideration of an in situ biore- terns over the means to achieve in situ TCE.The addition of methane stimulates mediation program implementation for biostimulation(such as the composition of the indigenous microorganisms to create aquifer treatment must include regulatory the injected/infiltrated water). You must an enzyme that can transform TCE. The liaison. During the initial stages of biore- determine the aquifer remedial goal, addition of the oxygen serves to maintain mediation planning, it is important that assess agency requirements for perform- the populations of the methane-degrading the involved regulatory agencies be ante monitoring of an installed and oper- microorganisms.This promising approach briefed on the potential benefits of in situ ating bioremediation system, and you is in the development stage for full-scale bioremediation for aquifer treatment. must assess the means to verify aquifer restoration. The following site regulatory aspects should be considered during the Thi• •isa ]r development of an in situ bioremediation s Wilt history book, program for a contaminated aquifer. In most situations, the contaminated but a lot of the hazmat storage ads region and plume of the aquifer lie upgradient from a drinking water source. you'tee reading are ol-d news• For these cases, a plume interdiction We carry the broadest line of secondary containment s; ] -r -� h` r ,_.,ry_� system must be installed to control plume systems, pallet racks, pallets, floorings, and drum ! !::;� -i_,ja. "rs' migration and minimize the potential for handling systems in the world. All our products are the plume to contaminate the drinking engineered using the latest technology. We're flexible too. Our units can be customized to fit your water source. This is where groundwater space needs. Call 502-776-7775 for our free 50-page pump-and-treat systems have high value. brochure and more information. For implementation of the in situ biore- .• �� mediation component of the program,it is 3026 River Park Drive, Louisville, KY 40211, USA usually desirable to take the treated systemtechnic 502.776-7776 ! 502.776-7775 FAX groundwater produced by the pump-and- treat system, amend it with the chemical • Circle 22 on card. additives useful for biological treatment of the contaminants of concern, and inject/ infiltrate the amended water back into the contaminant source area(s). If the pump-and-treat system is designed properly, and the extracted, treated and amended groundwater can be discharged completely back into the ground, a "closed loop" in situ bioreme- diation system will have been installed. This system then can be operated until the ,S`olinSr dissolved, sorbed and residual contamina- Water Level Meters tion in the aquifer is biodegraded. Such a system is, by definition, more Meter gives a clear signal when static water i expensive than a conventional groundwa- is reached. Accurate markings do not rub '` ter pump-and-treat system because of the off. Ridges prevent tape from sticking to wet additional costs involved with amending surfaces. Stranded stainless steel conduc- the treated groundwater and delivering it tors ensure tape does not stretch or corrode. back to the aquifer. However, the real Reel is very comfortable? savings for such a system is in the shorter Repeatable accuracy length of time necessary for aquifer y . restoration, because the in situ made easy! kA WSY bioremediation system addresses dis- Choose the P4 E=nvironmental Probe and solved, sorbed and residual free phase interchanged the P4 probe sleeve with the 'Y ` a organic contaminants_ T4 Temperature Sleeve. This allows the * � . In contrast, conventional groundwater measurement and profiling of temperature For use in pump-and-treat systems primarily treat in wells, to identity sources of water inflow monitoring wells. the dissolved phase and rely on slow and contamination, desorption of the sorbed and residual contaminants in response to a change in concentration gradient-Effective implem- nS entation of a combined pump-and-treat and in situ bioremediation system has I continued on page 49 Circle 21 on card. ;a ENVIRONMENTAL PROTECTION