Tracer injection test at Lemon Lane
October, 2001
Viacom, Inc.

A. Goals of the test:

1. To determine if the MW4I area wells are on a conduit which collects the majority of the drainage from the Lemon Lane Landfill
2. To determine if there is significant underflow between Illinois Central Spring and Quarry Spring.

B. Approach

1. Three dyes will be slug injected into wells near the site. Two wells that are injected will be phreatic wells. The phreatic wells will be located at different areas of the basin upgradient of the landfill. A third well in the epikarst, LF6 will also be injected. Each well will be injected with a different dye at the same time. Minimal flushing water (LF6 will be flushed with enough water to ensure that the dye gets out of the well sump) will be used and natural gradients will exist throughout the test. One or more of the 4I area wells will be sampled hourly. Additionally, wells on the southeast portion of the landfill will also be sampled.
2. In addition to well sampling at the landfill, sampling for both the dyes and PCBs will be done at Illinois Central (IC) and Quarry Springs. During this test period, the EPA will collect the waters from IC Spring but not discharge any water from the treatment plant. The purpose of this sampling is to see if there is significant dye (and PCB) tainted underflow between IC and Quarry Springs that would naturally bypass collection at IC Spring.
3. The dye test will be conducted at low flows over a period of several days when no rain is forecast. Initial flows should be between 30 and 120 gpm at IC Spring.

C. Specific Test Procedures

1. Procure three different dyes that can be analyzed on the IU spectrofluorophotometer and with sufficient resolution such that mutual interference is not a problem. The amounts of each dye to be used should be based on the final expected concentrations that may be seen at Quarry springs if a small amount of underflow is occurring and previous experience. Initially, 300 grams of each dye is expected to be injected. The dyes to be used are: fluorescein (Acid Yellow 73), and eosine (Acid Red 87) and phloxine B (acid red 92).
2. Take samples for background determinations in all locations to be monitored several weeks before conducting the dye injection.
3. Set up for slug injections at wells NN700, SP1 and LF6-8. The dyes to be used in the phreatic wells will be injected in the 795-800 amsl zones with peristaltic pumps. The dye injected at LF6 will be poured into the well. Fluoroscein will be injected at LF6. In each well 55-100 gallons of flushing water will immediately follow each injection. The flushing water will be dumped down the well bore with buckets or other suitable devices.
4. Establish the ability to sample the best 4I area well as determined by low flow PCB levels, voids encountered during drilling, and water levels. The well will be sampled either with a dedicated bailer or a pump. If a pump is used it should be capable of removing 10 gallons of water in 2 minutes. Dedicated bailers will be used for the other well sampling locations at the landfill (MW-15, 16,17,18,19). Charcoal packets will be placed in the following Valhalla wells: NN12, OO125, NN300, OO370 and MW6. These packets will be placed prior to dye injection and removed after all real time sampling has ceased.
5. Establish ISCO auto samplers at IC Spring and Quarry B. The autosamplers bottoms will be set up for 500 ml bottles. Set the samplers on one hour intervals with the first sample to be taken at dye injection.
6. Have the EPA stop all discharge of water from the treatment plant at least 8 hours prior to the dye injection time.
7. Inspect the IC spring channel near the old Viacom weir for any flow. If flow exist here or at the swallow hole, sandbag the channel and collect the waters by pumping back to the treatment plant. Do not allow any water flow into the swallow hole. Viacom requests that the EPA/State be responsible for stopping any flow into the swallow hole and taking any samples desired at this location. Viacom will analyze any samples EPA takes at this location for injected dyes.
8. Take at least two hourly samples from each of the wells prior to dye injection.
9. Inject the dyes. Then sample the 4I area well hourly. Sample the other landfill wells every 4 hours.
10. Continue to sample the 4I area well hourly for the first 24 hours after dye injection. Then shift all landfill wells to 4 hourly sample intervals. Cease well sampling after twice the expected travel time of the dye to IC Spring. The predicted travel time is based on a relationship between flow and travel time developed from the accumulated storm sampling data for IC Spring. This relationship is attached.
11. Continue sampling at the both springs hourly until 12 hours after breakthrough has been observed for both of the dyes injected into the phreatic wells. Then shift both springs to 4 hour sample intervals. Cease sampling at the springs when twice the predicted travel time has elapsed based on flow rates and the attached predicted travel time.
12. Analyze designated samples for PCBs and dyes. All hourly samples from the wells and springs will be analyzed for dyes. PCB analysis at the springs will be limited to every 4 hours. PCB analysis of wells will be limited to every 4 hours.

C. Schedule: