6.1.1. Regulatory Required Monitoring



The primary regulations that apply to ANL-E are the Illinois Pollution Control Board Rules, 35 IAC 611. These rules identify the inorganic (Section 611.301), organic (Sec-tion 611.311), copper, lead, and water quality parameter (Section 611.356 through 611.359) constituents and monitoring requirements.

All chemical analyses were performed by a commercial laboratory that is certified by the State of Illinois to conduct SDWA analyses. Lead was determined by graphite furnace atomic absorption spectroscopy. Copper was determined by inductively coupled plasma atomic emission

TABLE 6.1

ANL-E Water Supply Wells

Well No. Location Well Elevationa Static Water Level Bedrock Elevation Well Depthb Diameterc Yeard
1 Building 31 671 613 605 284 12 1948
2 Building 32 664 612 601 300 12 1948
3 Building 163 689 609 600 318 12 1955
4 Building 264 716 608 595 340 14 1959
a Feet mean sea level.
b Feet below ground.
c Inner diameter (in.).
d Year drilled.

spectroscopy. VOCs were determined by using a purge and trap sample pretreatment followed by gas chromatography-mass spectroscopy detection. Nitrate and fluoride were analyzed using ion chromatography. Samples were collected quarterly from each of the four ANL-E domestic wells and a treated tap water sample in Building 200. The tap water was analyzed for nitrate, metals, VOCs, pesticides, and herbicides. Mercury was determined by cold vapor atomic absorption spectroscopy. Selenium was analyzed by graphite furnace atomic absorption spectroscopy, while barium, cadmium, and chromium were determined by inductively coupled plasma atomic emission spectroscopy. Extraction, followed by gas chromatography-electron capture detection was used to determine 1,2-dibromo-3-chloropropane, ethylene dibromide, hexachlorocyclopentadiene, chlorinated pesticides, and herbicides. Carbamate pesticides were measured by liquid chromatography and fluorescence detection. Alkalinity was measured by titration, calcium by flame atomic absorption spectroscopy, and orthophosphate by a colormetric technique. The samples were analyzed for the constituents specified in the regulations by approved methods that allowed the minimum detectable limit of 0.0005 mg/L to be met for the organic chemicals. The results were provided to the DuPage County Health Department and the IDPH.

On March 17, 1993, the IDPH granted ANL-E a permanent waiver for sampling of asbestos and an extension to November 24, 1995, for the testing of inorganics/metals. On July 22, 1993, ANL-E submitted seven quarters of organic data and petitioned the IDPH for sampling/analysis waivers from the requirements. On August 6, 1993, the IDPH approved a waiver for the 18 Phase II Volatile Organic Compounds to November 24, 1998, a waiver for Synthetic Organic Chemicals/Herbicides-Pesticides to November 24, 1995, and a permanent waiver for all future sampling for unregulated chemicals. Future sampling is only required at a representative tap; however, well head sampling will be continued for informational monitoring of radionuclides and VOCs.

Based on the requirements and direction from the IDPH, the following required analyses were conducted in 1995. Nitrate/nitrite analyses were conducted on tap water samples collected February 28, 1995, and the tap water samples collected on May 18, 1995, were analyzed for inorganic parameters (fluoride, mercury, selenium, barium, cadmium, and chromium). The results are presented in Table 6.2. All concentrations were less than the State of Illinois MCL. The state also required that the one set of pesticide/herbicide compounds listed in 35 IAC 900.6532 be analyzed. The tap water sample collected May 18, 1995, was analyzed for these compounds, and the results are listed in Table 6.3. All parameters were less than their respective detection limits and the state limits. Quarterly results of three VOCs (dichloromethane, 1,2,4-trichlorobenzene, and 1,1,2-trichloroethane) are part of the 1995 Phase V federally required analysis. These results are presented in Table 6.4. All results were below the detection limits except dichloromethane (0.0012 mg/L) in the November 20, 1995, tap water sample, but this result was below the MCL of 0.005 mg/L.

Title 35, Part 611.356, of the IAC requires collection of finished water samples for lead and copper analyses at selected sites to determine if the concentrations of more than 10% of the samples are above the action level of 0.015 mg/L for lead and 1.3 mg/L for copper. The required sampling protocols maximize the opportunity for having lead and copper present. Sampling locations are determined after a water piping materials survey. Priority sampling locations are those that have lead pipes, are served by lead service lines, or have copper pipes with lead solder joints. Samples must be drawn from where the water has stood motionless in the

TABLE 6.2

State of Illinois Required Inorganic Chemicals (900.50), 1995 (Concentrations in mg/L)

Chemical Date Collected State Limit ANL-E Result
Nitrate February 28 10 0.59
Nitrite February 28 1 <0.02
Fluoride May 18 4 0.31
Mercury May 18 0.002 <0.0002
Barium May 18 5 <0.02
Cadmium May 18 0.005 <0.005
Chromium May 18 0.1 <0.01
Selenium May 18 0.05 <0.005



TABLE 6.3

State of Illinois Required Pesticides/Herbicides (900.65), 1995 (Concentrations in mg/L)

Chemical State Limit ANL-E Result
Alachlor 0.002 <0.0002
Aldicarb 0.01 <0.0005
Aldicarb Sulfone 0.04 <0.0008
Aldicarb Sulfoxide 0.01 <0.0005
Atrazine 0.003 <0.0001
Carbofuran 0.04 <0.0009
Chlordane 0.002 <0.0002
Eythylene Dibromide 0.00005 <0.00001
Heptachlor 0.0004 <0.00004
Heptachlor Epoxide 0.0002 <0.00002
Lindane 0.0002 <0.00002
Methoxychlor 0.4 <0.0001
Pentachlorophenol 0.2 <0.00004
Polychlorinated Biphenyl 0.0005 <0.0001
Toxaphene 0.005 <0.001
1,2-Dibromochloropropane 0.0002 <0.00002
2,4-D 0.07 <0.0001
2,4,5-TP (Silvex) 0.05 <0.00005

TABLE 6.4

Federally Required Phase V Volatile Organic Results, 1995 (Concentrations in mg/L)

Date Collected
Phase V Chemical March 1 May 18 August 14 November 20
Dichloromethane <0.0005 <0.0005 <0.0005 0.0012
1,2,4-Trichlorobenzene <0.0005 <0.0005 <0.0005 <0.0005
1,1,2-Trichloroethane <0.0005 <0.0005 <0.0005 <0.0005


piping for at least six hours. Because of exceedance of the lead and copper action level in 1994, semiannual sampling was required in 1995 at 40 sites.

Samples were collected, following the above protocols, on March 2, 1995, and August 22, 1995, analyzed by a laboratory certified to conduct SDWA analyses, and the results transmitted to the IDPH through DOE, on June 27, 1995, and December 13, 1995. The results indicated that seven of the 40 copper results exceeded the action level for each sampling period, while the lead results did not exceed the action level. The results are presented in Table 6.5. On the basis of direction received from the IDPH on December 19, 1995, semiannual sampling at 40 sites must be continued during 1996.


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