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**Brookhaven National Laboratory**

**Sewage Treatment Plant**

**Facility Environmental Monitoring Report**

**Calendar Year 2000**

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##### April 24, 2001

Prepared by:

D. Paquette, R. Lee, B. Hooda and M. Allocco

##### Environmental Services Division

###### GW66ER.01

##### 

##### **Brookhaven National Laboratory**

##### **Sewage Treatment Plant**

##### **Facility Environmental Monitoring Report**

**Calendar Year 2000**

***Summary of Results**: There were eight reported SPDES permit
exceedances during CY 2000. Zinc concentrations in the STP discharge
exceeded permit limits on four occasions. There were also single permit
exceedances for tetrachloroethylene, fecal coliform (average and
maximum), iron and total suspended solids removal efficiency.*

*Groundwater monitoring results indicate only low-level impacts to
groundwater quality from STP operations. Sodium levels slightly exceeded
water quality standards in several wells that monitor the STP filter bed
area. Low levels of nitrates and tritium were also detected, but at
concentrations below applicable water quality standards. No volatile
organic compounds were detected in groundwater near the plant.*

*Environmental TLD measurements indicate that dose rates in the vicinity
of the STP are equivalent to natural background values.*

###### Background

The STP processes sanitary sewage for BNL facilities. The STP processes
an average of 0.72 million gallons per day (MGD) during non-summer
months and approximately 1.25 MGD during the summer months. Treatment of
the sanitary waste stream includes: primary clarification to remove
settleable solids and floatable materials; aerobic oxidation for
secondary removal of the biological matter and nitrification of ammonia;
secondary clarification; sand filtration for final effluent polishing;
and, ultraviolet disinfection for bacterial control prior to discharge
into the Peconic River. By regulating the oxygen levels during the
treatment process, nitrogen can be biologically removed by using nitrate
bound oxygen for respiration. This discharge is regulated under a NYSDEC
SPDES permit (NY-0005835).

Wastewater from the STP's clarifier is released to the sand filter beds,
where the water percolates through three feet of sand before being
recovered by an underlying clay tile drain system, which transports the
water to the discharge point at the Peconic River (SPDES Outfall 001).
Approximately 15% of the water released to the filter beds is either
lost to evaporation or to direct groundwater recharge. At the present
time, six sand filter beds are used in rotation.

Two emergency hold-up ponds are located to the east of the sand filter
bed area. The hold-up ponds are used for the emergency storage of
sanitary waste in the event of an upset condition or if the influent
contains contaminants in concentrations exceeding BNL administrative
limits and/or SPDES permit effluent release criteria. The hold-up ponds
are equipped with fabric reinforced (hypalon) plastic liners that are
heat-welded along all seams. The first lined hold-up pond was
constructed in 1978, and has a capacity of approximately four million
gallons. A second four million gallon capacity lined pond was
constructed in 1989, for a combined capacity of nearly eight million
gallons. The combined capacity of the hold-up ponds provides the
Laboratory with the ability to divert all sanitary system effluent for
approximately twelve days. As part of Phase III Sewage Treatment Plant
Upgrades project, the liners will be enhanced by the addition of new
primary liners and a leak detection system. The existing liners will be
used as secondary liners.

###### Environmental Monitoring Program

BNL has established an environmental monitoring program at STP to
evaluate potential impacts to environmental quality and to demonstrate
compliance with DOE requirements and applicable federal, state and local
laws, regulations and permits. The primary monitoring program is
conducted in accordance with BNL's SPDES permit. BNL also uses
groundwater monitoring to provide a secondary means of evaluating
potential impacts of STP operations. The environmental monitoring
program for the STP is described in the BNL Environmental Monitoring
Plan (Daum *et al*. 2000; BNL, 2001). The monitoring programs
specifically designed for the STP area are summarized below.

###### 

###### Monitoring Results

**SPDES Monitoring**

Sanitary and process wastewaters generated by Laboratory operations are
conveyed to the STP for treatment prior to discharge to the Peconic
River. The STP provides tertiary treatment of sanitary and process
wastewater (i.e., biological reduction of organic matter and reduction
of nitrogen). This treatment process became fully functional in 1998.

The locations of SPDES monitoring points are presented on Figure 1. A
summary of the CY 2000 monitoring results for the STP discharge at
Outfall 001 is provided in Table 1.

While the STP discharge complies with SPDES permit limits more than 95%
of the time, periodic excursions are noted annually. During 2000 there
were eight reported exceedances. Zinc concentrations in the STP
discharge exceeded permit limits on four occasions, two in May and two
in December. Zinc excursions continue into CY 2001. Although a
definitive source of zinc has not been identified to date, a potential
source may be the sewage piping system upgrade project that started in
late 1999. This project involves the removal of roots and cleaning of
the lines, and in damaged areas replacement or relining the pipes with a
fiberglass sleeve. Experimental and operational sources are also being
reviewed to ensure wastewater is being properly managed at the source.
These investigations continue. Single exceedances for
tetrachloroethylene (PCE), fecal coliform (average and maximum), iron
and total suspended solids (TSS) removal were also reported for the
year. Iron was attributed to excavations being performed in the STP sand
filters and the excursion for TSS was accounted for by low
concentrations of suspended solids in the influent to the STP. While PCE
is monitored several times monthly, it is not routinely reported to the
NYSDEC as part of the BNL discharge monitoring report submittals.
However, when a sample collected in June exhibited a concentration of
31μg/L, a report was submitted to the NYSDEC. (Note: The New York State
Ambient Water Quality Standard for PCE is 5 μg/L. PCE is routinely used
in commercial cleaners and over-the-counter spot removers.) PCE has not
been detected in STP effluent over the last five years (1995-1999). The
detection of this compound is suspected of being a false positive
result. Similarly, a positive result for fecal coliform is suspected of
being the result of cross contamination. Inspection of the ultraviolet
light disinfection system showed it to be fully operational.

**Groundwater**

The STP's groundwater monitoring program is designed to provide a
secondary means of verifying that STP operations are not impacting
environmental quality. Six wells are used to monitor groundwater quality
in the filter bed area and three wells are monitored in the holding pond
area (Figure 2). Groundwater monitoring results for CY 2000 indicate
only low-level impacts to groundwater quality from STP operations.

[Radiological Analyses]{.underline}: Radioactivity levels in samples
collected from the STP wells were generally typical of ambient
(background) levels (Table 2). Tritium was not detected in wells located
in the immediate filter bed area. Low-levels of tritium (up to 2,500
pCi/L) were detected in Well 039-88 (up to 2,500 pCi/L) and Well 039-89
(up to 799 pCi/L) located downgradient of the holding ponds. Because the
ponds have not been used recently to hold tritiated waste water and the
wells are also located downgradient of the filter bed area, it is likely
that the tritium originated from past water releases to the filter beds.
An elevated gross alpha concentration of 94.7 pCi/L was detected in the
June sample from Well 039-88. This value exceeds the 15 pCi/L drinking
water standard. However, gross alpha was not detected in the sample
collected from this same well in December. Historical gross alpha
measurements in groundwater at the STP have generally been \<3 pCi/L,
well below the 15 pCi/L standard. It is likely that the elevated gross
alpha concentration in the June sample is due to an erroneous
measurement or sample cross contamination. If future STP groundwater
samples indicate elevated gross alpha, BNL will conduct
radionuclide-specific analyses to identify possible alpha emitting
radionuclides.

[Non-radiological Analyses]{.underline}: During CY 2000, all water
quality and most metals concentrations were below the applicable New
York State Ambient Water Quality (NYS AWQS) (see Tables 3 and 4). Sodium
was detected at concentrations slightly above the NYS AWQS of 20 mg/L in
three filter bed area wells. Wells 039-07, 039-08 and 039-86 had maximum
sodium concentrations of 22.3 mg/L, 30 mg/L and 29.2 mg/L, respectively.
Nitrates were detected in most STP area wells, with a maximum
concentration of 9.9 mg/L detected in filter bed area monitoring Well
039-08. The NYS AWQS for nitrate is 10 mg/L. Volatile organic compounds
were not detected in any of the monitoring wells.

**Environmental TLDs**

Measurements of environmental background radiation are conducted through
a network of onsite and offsite environmental TLDs. The TLDs allow for
the measurement of radiation from cosmic and terrestrial sources, as
well as any contribution from Laboratory operations. One of the TLDs
038-450 is located at the STP (Figure 3). TLD data are collected from
this monitoring location on a quarterly basis. The ambient dose rates
for the four quarters were 21, 19, 18, and 22 mrem, respectively. The
dose rates were similar to normal background rates found in the area.

**Future Monitoring Actions**

It is recommended that:

-   SPDES monitoring program will continue per permit requirements.

-   Maintain the groundwater monitoring program on its current
    semiannual schedule.

-   Continue the TLD monitoring program on it current schedule.

**References**

BNL, 2001. Brookhaven National Laboratory Environmental Monitoring Plan,
CY 2001 Update (January 2001). BNL-52584 Update.

Daum, M., Dorsch, W., Fry, J., Green, T., Lee, R., Naidu, J., Paquette,
D., Scarpitta, S., and Schroeder, G., 2000. Brookhaven National
Laboratory, Environmental Monitoring Plan 2000 (March 31, 2000).

**BNL Facility Environmental Monitoring Report**

# **Sewage Treatment Plant**

**SPDES Monitoring Program**

######### Table 1

+----------------+----+---+-----------+---------+---------+----------+
|                |    |   | **Min.    | **      | **No.   | **P      |
|                |    |   | Mon       | SPDES** | of**    | ercent** |
|                |    |   | itoring** |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| **Analyte**    | ** | * | **Fr      | **      | *       | **       |
|                | Mi | * | equency** | Limit** | *Exceed | Complian |
|                | n. | M |           |         | ances** | ce^\*^** |
|                | ** | a |           |         |         |          |
|                |    | x |           |         |         |          |
|                |    | . |           |         |         |          |
|                |    | * |           |         |         |          |
|                |    | * |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Max.           | 52 | 7 | Daily     | 90      | 0       | 100      |
| Temperature    |    | 7 |           |         |         |          |
| (°F)           |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| pH (SU)^(1)^   | 5  | 7 | Cont.     | Min.    | 0       | 100      |
|                | .8 | . | Recorder  | 5.8     |         |          |
|                |    | 7 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           | Max.    |         |          |
|                |    |   |           | 9.0     |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Avg. 5 day     | \< | 5 | Twice     | Avg. 10 | 0       | 100      |
| Biological     | 2  |   | Monthly   |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Oxygen Demand  |    |   |           |         |         |          |
| (BOD) (mg/L)   |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Max. 5 day BOD | \< | 8 | Twice     | Max. 20 | 0       | 100      |
| (mg/L)         | 2  |   | Monthly   |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| \% BOD Removal | \> | 9 | Monthly   | 85      | 0^(2)^  | 100      |
|                | 83 | 7 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Avg. Total     | \< | \ | Twice     | Avg. 10 | 0       | 100      |
| Suspended      | 4  | < | Monthly   |         |         |          |
|                |    | 4 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Solids (TSS)   |    |   |           |         |         |          |
| (mg/L)         |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Max. TSS       | \< | \ | Twice     | Max. 20 | 0       | 100      |
| (mg/L)         | 4  | < | Monthly   |         |         |          |
|                |    | 4 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| \% TSS Removal | \> | 9 | Monthly   | 85      | 1^(3)^  | 92       |
|                | 73 | 9 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Settleable     | 0  | 0 | Daily     | 0.1     | 0       | 100      |
| Solids (ml/L)  | .0 | . |           |         |         |          |
|                |    | 0 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Ammonia        | \< | 1 | Twice     | 2       | 0       | 100      |
| Nitrogen       | 0. | . | Monthly   |         |         |          |
| (mg/L)         | 05 | 1 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Total Nitrogen | 5  | 8 | Twice     | 10      | 0       | 100      |
| (mg/L)         | .8 | . | Monthly   |         |         |          |
|                |    | 0 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Total          | 0  | 1 | Twice     | NA^(4)^ | 0       | 100      |
| Phosphorus     | .4 | . | Monthly   |         |         |          |
| (mg/L)         |    | 5 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Cyanide (μg/L) | \< | \ | Twice     | 100     | 0       | 100      |
|                | 10 | < | Monthly   |         |         |          |
|                |    | 1 |           |         |         |          |
|                |    | 0 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Copper (mg/L)  | 0. | 0 | Twice     | 0.15    | 0       | 100      |
|                | 04 | . | Monthly   |         |         |          |
|                |    | 0 |           |         |         |          |
|                |    | 6 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Iron (mg/L)    | 0. | 0 | Twice     | 0.37    | 1^(5)^  | 96       |
|                | 01 | . | Monthly   |         |         |          |
|                |    | 5 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Lead (mg/L)    | \< | 0 | Twice     | 0.019   | 0       | 100      |
|                | 0  | . | Monthly   |         |         |          |
|                | .0 | 0 |           |         |         |          |
|                | 01 | 0 |           |         |         |          |
|                |    | 5 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Nickel (mg/L)  | 0  | 0 | Twice     | 0.11    | 0       | 100      |
|                | .0 | . | Monthly   |         |         |          |
|                | 03 | 0 |           |         |         |          |
|                |    | 1 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Silver (mg/L)  | 0  | 0 | Twice     | 0.015   | 0       | 100      |
|                | .0 | . | Monthly   |         |         |          |
| mg/L           | 01 | 0 |           |         |         |          |
|                |    | 0 |           |         |         |          |
|                |    | 6 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Zinc (mg/L)    | 0. | 0 | Twice     | 0.1     | 4^(6)^  | 86       |
|                | 01 | . | Monthly   |         |         |          |
| mg/L           |    | 1 |           |         |         |          |
|                |    | 5 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Mercury (mg/L) | \< | 0 | Twice     | 0.0008  | 0       | 100      |
|                | 0. | . | Monthly   |         |         |          |
| mg/L           | 00 | 0 |           |         |         |          |
|                | 01 | 0 |           |         |         |          |
|                |    | 0 |           |         |         |          |
|                |    | 2 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Toluene (μg/L) | \< | \ | Twice     | 5       | 0       | 100      |
|                | 1  | < | Monthly   |         |         |          |
| ug/L           |    | 1 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Methylene      | \< | \ | Twice     | 5       | 0       | 100      |
| Chloride       | 1  | < | Monthly   |         |         |          |
| (μg/L)         |    | 1 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| 1,1,1-T        | \< | \ | Twice     | 5       | 0       | 100      |
| richloroethane | 1  | < | Monthly   |         |         |          |
| (μg/L)         |    | 1 |           |         |         |          |
|                |    |   |           |         |         |          |
| ug/L           |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| 2-Butanone     | \< | \ | Twice     | 50      | 0       | 100      |
| (μg/L)         | 1  | < | Monthly   |         |         |          |
|                |    | 5 |           |         |         |          |
| ug/L           |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| PCBs (μg/L)    | \< | 0 | Quarterly | NA      | 0       | 100      |
|                | 0  | . |           |         |         |          |
|                | .0 | 0 |           |         |         |          |
|                | 65 | 5 |           |         |         |          |
|                |    | 3 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Max. Flow      | 0  | 1 | Cont.     | Max.    | 0       | 100      |
| (MGD)          | .6 | . | Recorder  | 2.3     |         |          |
|                |    | 9 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Avg. Flow      | 0  | 0 | Cont.     | NA      | 0       | 100      |
| (MGD)          | .5 | . | Recorder  |         |         |          |
|                |    | 7 |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Avg. Fecal     | \< | 4 | Twice     | 200     | 1^(8)^  | 96       |
| Coliform       | 2  | 5 | Monthly   |         |         |          |
| (MPN/100       |    | 1 |           |         |         |          |
| ml)^(7)^       |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
|                |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+
| Max Fecal      | \< | 9 | Twice     | 400     | 1^(8)^  | 96       |
| Coliform       | 2  | 0 | Monthly   |         |         |          |
| (MPN/100       |    | 0 |           |         |         |          |
| ml)^(7)^       |    |   |           |         |         |          |
+----------------+----+---+-----------+---------+---------+----------+

\* % Compliance = \[(Total No. Samples -- Total No. Exceedances) / Total
No. of Samples\] x 100

(1) SU = Standard Unit

(2) The calculated BOD percent removal was greater than 83 percent in
    November. The 5-day BOD results were below the analytical detection
    limit and therefore the actual percent removal cannot be precisely
    determined.

(3) A permit violation occurred in April due to low levels of solids
    entering the sewage treatment plant. STP effluent levels of
    suspended solids were below the permit limits. The February percent
    removal could not be accurately determined due to the low
    concentration measured in the influent and effluent to the sewage
    treatment plant.

\(4\) NA = Not Applicable

(5) A permit violation occurred in June of 2000. An investigation
    revealed that the Plant Engineering Division had performed tests
    within the sand filter beds at the Sewage Treatment Plant during the
    last part of May. The filter beds contain elevated levels of iron
    and therefore this is the most probable cause of the permit
    violation.

(6) There were permit violations in May and December of 2000. The
    December 2000 violations are most probably due to sewer cleaning
    being performed onsite during November and December.

(7) MPN = Most Probable Number

(8) A permit violation occurred in January of 2000. In 1997 the Sewage
    Treatment Plant was equipped with an ultraviolet disinfection
    system, which results in low to non-detect levels of coliform in the
    effluent. It is therefore thought that the violation is due to dirty
    glassware.

Other: A permit violation occurred in June of 2000 at the STP effluent
for tetrachloroethylene. The Laboratory's SPDES permit does not allow
the discharge of this chemical in any concentration.

**BNL Facility Environmental Monitoring Report**

# **Sewage Treatment Plant**

**Groundwater Monitoring Program**

**Gross Alpha, Gross Beta, Tritium and Gamma Spectroscopy Results for CY
2000**

**Table 2**

+-------+---------+------------+------------+------------+------------+
| #     | *       | **Gross    | **Gross    | *          | **Potassi  |
|  Well | *Sample | Alpha**    | Beta**     | *Tritium** | um-40(c)** |
|       | P       |            |            |            |            |
|       | eriod** | *          | *          | *          | *          |
|       |         | *(pCi/L)** | *(pCi/L)** | *(pCi/L)** | *(pCi/L)** |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | 1.5 +/-    | 3.8 +/-    | \<295      | ND         |
| 38-02 |         | 0.69       | 1.3        |            |            |
| a     | D       |            |            | \<290      | 30.5 +/-   |
|       | ecember | 1.9 +/-    | \<2.5      |            | 21.4       |
|       |         | 0.64       |            |            |            |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | \<1.0      | 22.7 +/-   | \<295      | ND         |
| 38-03 |         |            | 1.9        |            |            |
| a     | D       | \<0.8      |            | \<346      | 32.3 +/-   |
|       | ecember |            | 16.0 +/-   |            | 23.0       |
|       |         |            | 1.8        |            |            |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | \<1.0      | 2.9 +/-    | \<295      | ND         |
| 39-07 |         |            | 1.3        |            |            |
| a     | D       | \<0.8      |            | \<290      | ND         |
|       | ecember |            | \<2.5      |            |            |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | \<1.0      | 4.2 +/-    | \<295      | 34.2 +/-   |
| 39-08 |         |            | 1.3        |            | 28.2       |
| a     | D       | \<0.8      |            | \<290      |            |
|       | ecember |            | \<2.5      |            | 44.0 +/-   |
|       |         |            |            |            | 22.2       |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | 2.9 +/-    | 4.6 +/-    | \<309      | 202 +/-    |
| 39-86 |         | 0.7        | 1.5        |            | 87.8       |
| a     | D       |            |            | \<290      |            |
|       | ecember | \<0.8      | \<2.5      |            | 35.3 +/-   |
|       |         |            |            |            | 25.5       |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | 1.5 +/-    | 7.4 +/-    | \<309      | ND         |
| 39-87 |         | 0.6        | 1.6        |            |            |
| a     | D       |            |            | \<346      | ND         |
|       | ecember | 0.9 +/-    | 6.5 +/-    |            |            |
|       |         | 0.5        | 1.6        |            |            |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | [94.7 +/-  | 20.8 +/-   | 2,500 +/-  | 217.0 +/-  |
| 39-88 |         | 3          | 1.9        | 320        | 211.7      |
| b     | D       | .5]{.mark} |            |            |            |
|       | ecember | (d)        | \<2.5      | 748 +/-    | 35.8 +/-   |
|       |         |            |            | 216        | 21.9       |
|       |         | \<0.8      |            |            |            |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | \<0.9      | \<2.3      | 799 +/-    | ND         |
| 39-89 |         |            |            | 250        |            |
| b     | D       | \<0.8      | \<2.5      |            | ND         |
|       | ecember |            |            | 304 +/-    |            |
|       |         |            |            | 203        |            |
+-------+---------+------------+------------+------------+------------+
| 0     | June    | \<0.9      | \<2.3      | \<309      | ND         |
| 39-90 |         |            |            |            |            |
| b     | D       | 0.8 +/-    | \<2.5      | \<290      | 24.2 +/-   |
|       | ecember | 0.5        |            |            | 21.5       |
+-------+---------+------------+------------+------------+------------+
| Ty    |         | 1.1        | 2.2        | 300        | \--        |
| pical |         |            |            |            |            |
| MDL   |         |            |            |            |            |
+-------+---------+------------+------------+------------+------------+
| SDWA  |         | 15         | 50         | 20,000     | 280        |
| Limit |         |            |            |            |            |
+-------+---------+------------+------------+------------+------------+

a: Well is located near STP Filter Beds.

b: Well is located immediately downgradient of STP Holding Ponds. Well
is also nominally downgradient of the STP filter bed area.

c: Potassium-40 is a naturally occurring radionuclide. Other, naturally
occurring radionuclides may have been detected in some samples (e.g.,
Bi-214, Pb-212, and Pb-214).

d: Accuracy of the gross alpha result for this sample is suspect.

Note: SDWA Limit is based upon 40 CFR 141 Safe Drinking Water Act

ND = Radionuclide not detected.

MDL = Minimum Detection Limit.

**BNL Facility Environmental Monitoring Report**

**Sewage Treatment Plant**

**Groundwater Monitoring Program**

**Water Quality Results for CY 2000**

**Table 3**

+----------+---------+---------------+---------------+---------------+
| **Well** | *       | **Chlorides** | **Sulfates**  | **Nitrate**   |
|          | *Sample |               |               |               |
|          | P       | **(mg/L)**    | **(mg/L)**    | **(mg/L)**    |
|          | eriod** |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 038-02a  | June    | 10.6          | 10.0          | 4.8           |
|          |         |               |               |               |
|          | D       | 4.9           | 9.3           | 5.5           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 038-03a  | June    | 6.4           | 19.5          | \<1.0         |
|          |         |               |               |               |
|          | D       | \<4.0         | 16.3          | 1.4           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-07a  | June    | 15.8          | 8.5           | 3.4           |
|          |         |               |               |               |
|          | D       | 24.9          | 9.8           | 6.1           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-08a  | June    | 19.7          | 14.0          | 9.9           |
|          |         |               |               |               |
|          | D       | 26.0          | 17.2          | 7.0           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-86a  | June    | 22.2          | 16.8          | 5.2           |
|          |         |               |               |               |
|          | D       | 25.7          | 12.5          | 6.3           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-87a  | June    | 8.0           | 11.9          | 2.1           |
|          |         |               |               |               |
|          | D       | 4.1           | 14.4          | 1.2           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-88b  | June    | 4.5           | 16.4          | 2.1           |
|          |         |               |               |               |
|          | D       | \<4.0         | 17.1          | 1.5           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-89b  | June    | 5.1           | 13.9          | 1.6           |
|          |         |               |               |               |
|          | D       | \<4.0         | 11.5          | 1.6           |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| 039-90b  | June    | 5.1           | 11.9          | 2.0           |
|          |         |               |               |               |
|          | D       | 5.1           | 14.3          | \<1.0         |
|          | ecember |               |               |               |
+----------+---------+---------------+---------------+---------------+
| Typical  |         | 4.0           | 4.0           | 1.0           |
| MDL      |         |               |               |               |
+----------+---------+---------------+---------------+---------------+
| NYSAWQS  |         | 250           | 250           | 10            |
+----------+---------+---------------+---------------+---------------+

MDL: Minimum Detection Limit

a: Well is located near STP Filter Beds.

b: Well is located immediately downgradient of STP Holding Ponds. Well
is also nominally downgradient of the STP filter bed area.

**BNL Facility Environmental Report**

**Sewage Treatment Plant**

**Groundwater Monitoring Program**

**Metals Analytical Results for CY 2000**

**Table 4**

<table>
<colgroup>
<col style="width: 9%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 7%" />
</colgroup>
<tbody>
<tr class="odd">
<td><strong>Well</strong></td>
<td><strong>Sample Period</strong></td>
<td><p><strong>Ag</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Al</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Cd</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Cr</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Cu</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Fe</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Hg</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Mn</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Na</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Pb</strong></p>
<p><strong>(mg/L)</strong></p></td>
<td><p><strong>Zn</strong></p>
<p><strong>(mg/L)</strong></p></td>
</tr>
<tr class="even">
<td>038-02 a</td>
<td><p>June</p>
<p>December</p></td>
<td><p>0.018</p>
<p>&lt;0.001</p></td>
<td><p>0.008</p>
<p>0.011</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.002</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.002</p>
<p>&lt;0.002</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0002</p>
<p>&lt;0.0001</p></td>
<td><p>&lt;0.002</p>
<p>&lt;0.002</p></td>
<td><p>10.5</p>
<p>8.4</p></td>
<td><p>0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>&lt;0.004</p>
<p>&lt;0.004</p></td>
</tr>
<tr class="odd">
<td>038-03 a</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.046</p>
<p>0.019</p></td>
<td><p>&lt;0.001</p>
<p>0.001</p></td>
<td><p>0.002</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.002</p>
<p>0.006</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0003</p>
<p>&lt;0.0001</p></td>
<td><p>&lt;0.002</p>
<p>0.057</p></td>
<td><p>5.8</p>
<p>3.2</p></td>
<td><p>0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>&lt;0.004</p>
<p>0.298</p></td>
</tr>
<tr class="even">
<td>039-07 a</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.012</p>
<p>0.006</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.002</p>
<p>&lt;0.001</p></td>
<td><p>0.085</p>
<p>0.003</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0002</p>
<p>&lt;0.0001</p></td>
<td><p>0.015</p>
<p>0.004</p></td>
<td><p>14.0</p>
<p>22.3</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>0.021</p>
<p>0.009</p></td>
</tr>
<tr class="odd">
<td>039-08 a</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.021</p>
<p>0.012</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.002</p>
<p>&lt;0.001</p></td>
<td><p>0.030</p>
<p>0.014</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>&lt;0.0002</p>
<p>&lt;0.0001</p></td>
<td><p>&lt;0.002</p>
<p>&lt;0.002</p></td>
<td><p>28.0</p>
<p>30.0</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>&lt;0.004</p>
<p>&lt;0.004</p></td>
</tr>
<tr class="even">
<td>039-86 a</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.020</p>
<p>0.019</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.002</p>
<p>&lt;0.001</p></td>
<td><p>0.025</p>
<p>0.003</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0002</p>
<p>&lt;0.0001</p></td>
<td><p>0.067</p>
<p>0.052</p></td>
<td><p>29.2</p>
<p>26.3</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>&lt;0.004</p>
<p>&lt;0.004</p></td>
</tr>
<tr class="odd">
<td>039-87 a</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.035</p>
<p>0.030</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.003</p>
<p>&lt;0.002</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>&lt;0.0002</p>
<p>&lt;0.0001</p></td>
<td><p>0.017</p>
<p>0.019</p></td>
<td><p>5.6</p>
<p>4.7</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>0.218</p>
<p>0.050</p></td>
</tr>
<tr class="even">
<td>039-88 b</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.018</p>
<p>0.012</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.002</p>
<p>&lt;0.002</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0003</p>
<p>&lt;0.0001</p></td>
<td><p>0.008</p>
<p>0.007</p></td>
<td><p>4.5</p>
<p>3.7</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>&lt;0.004</p>
<p>&lt;0.004</p></td>
</tr>
<tr class="odd">
<td>039-89 b</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.096</p>
<p>0.078</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.002</p>
<p>&lt;0.002</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0004</p>
<p>&lt;0.0001</p></td>
<td><p>0.085</p>
<p>0.040</p></td>
<td><p>3.4</p>
<p>2.8</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>0.035</p>
<p>0.008</p></td>
</tr>
<tr class="even">
<td>039-90 b</td>
<td><p>June</p>
<p>December</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>0.009</p>
<p>0.005</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.001</p>
<p>&lt;0.001</p></td>
<td><p>&lt;0.002</p>
<p>&lt;0.002</p></td>
<td><p>&lt;0.075</p>
<p>&lt;0.075</p></td>
<td><p>0.0003</p>
<p>&lt;0.0001</p></td>
<td><p>0.005</p>
<p>0.003</p></td>
<td><p>4.9</p>
<p>6.6</p></td>
<td><p>&lt;0.0013</p>
<p>&lt;0.0013</p></td>
<td><p>0.006</p>
<p>&lt;0.004</p></td>
</tr>
<tr class="odd">
<td>Typical MDL</td>
<td></td>
<td>0.001</td>
<td>0.002</td>
<td>0.001</td>
<td>0.001</td>
<td>0.002</td>
<td>0.075</td>
<td>0.0002</td>
<td>0.002</td>
<td>1.0</td>
<td>0.001</td>
<td>0.004</td>
</tr>
<tr class="even">
<td>NYSAWQS</td>
<td></td>
<td>0.05</td>
<td>0.1</td>
<td>0.01</td>
<td>0.05</td>
<td>0.2</td>
<td>0.3</td>
<td>0.0007</td>
<td>0.3</td>
<td>20</td>
<td>0.025</td>
<td>0.3</td>
</tr>
</tbody>
</table>

Note: Primary potential contaminants shown. Other metals were analyzed
for -- see database for complete data set

MDL: Minimum Detection Limit

NA: Not analyzed for.

a: Well is located near STP Filter Beds.

b: Well is located downgradient of STP Holding Ponds.

![](media/image3.png)