Environmental monitoring for the 2021 construction includes water and air. Air monitoring is being performed around the secure landfill, Route 131 Staging Area, Haverstock Road Staging Area, and Alcoa East Plant dock during construction at those locations. Water monitoring is being performed in the river and at water intakes. These monitoring activities and results for September are summarized below. (Additional 2021 Lab Results: Current Month | April | May | June | July | August | September )
Air Monitoring - 2021 Secure Landfill Construction and Operation
Program includes particulate monitoring using real-time meters for particulates (or dust) and volatile organic compounds (VOCs) and sampling for PCB analytical testing. Corrective action levels have been established based on levels that are safe for the community for particulates, VOCs, and PCBs. The actual monitoring results are compared to the corrective action levels to determine if adjustments in construction are needed. The air monitoring locations and tabulated results are provided below.
Note that air monitoring for PCBs and VOCs was discontinued in June as material handling and disposal operations were completed. Air monitoring for dust was also discontinued in June as landfill construction and covering efforts were completed. Additional dust monitoring will be performed if final covering activities are performed this year.
Air Monitoring - 2021 Route 131 Staging Area
Program includes particulate monitoring using real-time meters for particulates (or dust) and volatile organic compounds (VOCs) and sampling for PCB analytical testing during handling of potential PCB-containing material. Corrective action levels have been established based on levels that are safe for the community for particulates, VOCs, and PCBs. The actual monitoring results are compared to the corrective action levels to determine if adjustments in construction are needed. The air monitoring locations and tabulated results are provided below.
Note that air monitoring for PCBs was discontinued in June as material handling was completed. Air monitoring also transitioned to particulate (dust) only once PCB material handling was completed.
2021 Air Particulate Data (Corrective Action Level = 0.150 milligram per cubic meter above upwind location)
| Monitoring Station ID (see figure) | ||||||
|---|---|---|---|---|---|---|
| Date | Action Level Check | SA-AIR1 | SA-AIR2 | SA-AIR3 | SA-AIR4 | Notes |
| September 1 | All Below | NA | NA | 0.0184 | NA | SA-AIR1, SA-AIR2, SA-AIR4 data not reported due to modem issue |
| September 2 | All Below | NA | NA | 0.0269 | NA | SA-AIR1, SA-AIR2, SA-AIR4 data not reported due to modem issue |
| September 3 | All Below | NA | NA | 0.014 | NA | SA-AIR1, SA-AIR2, SA-AIR4 data not reported due to modem issue |
| September 4 | All Below | 0.0083 | 0.0041 | 0.0097 | 0.0192 | -- |
| September 5 | All Below | 0.0182 | 0.0043 | 0.0219 | 0.017 | -- |
| September 8 | All Below | 0.0099 | 0.0096 | 0.0109 | 0.0184 | -- |
| September 9 | All Below | 0.0131 | 0.0155 | 0.0164 | 0.0218 | -- |
| September 10 | All Below | 0.0099 | 0.0119 | 0.017 | 0.0149 | -- |
| September 11 | All Below | 0.0036 | 0.0106 | 0.0081 | 0.0205 | -- |
| September 12 | All Below | 0.0077 | 0.0105 | 0.0135 | 0.0225 | -- |
| September 14 | All Below | 0.0043 | 0.0074 | 0.0112 | 0.007 | -- |
| September 15 | All Below | 0.0341 | 0.0322 | 0.0345 | 0.0394 | -- |
| September 16 | All Below | 0.0051 | 0.0082 | 0.0188 | 0.0434 | -- |
| September 17 | All Below | 0.003 | 0.0077 | 0.0061 | 0.0179 | -- |
| September 18 | All Below | 0.015 | 0.0126 | 0.0153 | 0.0161 | -- |
| September 19 | All Below | 0.0108 | 0.0107 | 0.0141 | 0.0153 | -- |
| September 21 | All Below | 0.0051 | 0.0097 | 0.0084 | 0.0103 | -- |
| September 22 | All Below | 0.0057 | 0.0095 | 0.0085 | 0.0106 | -- |
| September 23 | All Below | 0.0108 | 0.0087 | 0.012 | 0.0142 | -- |
| September 24 | All Below | 0.0032 | 0.0073 | 0.0056 | 0.0074 | -- |
| September 25 | All Below | 0.002 | 0.0081 | 0.0051 | 0.0053 | -- |
| September 26 | All Below | 0.0049 | 0.0107 | 0.0152 | 0.0107 | -- |
| September 28 | All Below | 0.0077 | 0.011 | 0.0143 | 0.0167 | -- |
| September 29 | All Below | 0.0075 | 0.0101 | 0.0112 | 0.0111 | -- |
| September 30 | All Below | 0.0036 | 0.0116 | 0.0108 | 0.0214 | -- |
NA = Data not collected in accordance with plan
Particulates (milligrams per cubic meter)
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Air Monitoring - 2021 Dredge Mobile River Stations
Program includes sampling for PCB analytical testing. The corrective action level has been established based on a level that is safe for the community. The actual monitoring results are compared to the corrective action level to determine if adjustments in construction are needed. The air monitoring locations and tabulated results are provided below.
Note that air monitoring for PCBs was performed in April through June concurrent with the river dredge operations. Dredging is complete.
Air Monitoring - 2021 Haverstock Road Support Area
Program includes particulate monitoring using real-time meters for particulates (or dust). The corrective action level has been established based on a level that is safe for the community. The actual monitoring results are compared to the corrective action level to determine if adjustments in construction are needed. The air monitoring locations and tabulated results are provided below.
2021 Air Particulate Data (Corrective Action Level = 0.150 milligram per cubic meter above upwind location)
| Monitoring Station ID (see figure) | |||||
|---|---|---|---|---|---|
| Date | Action Level Check | HAV-AIR1 | HAV-AIR2 | HAV-AIR3 | Notes |
| September 1 | All Below | 0.0242 | 0.0107 | 0.047 | -- |
| September 2 | All Below | 0.0198 | 0.0061 | 0.047 | -- |
| September 3 | All Below | 0.015 | 0.002 | 0.0366 | -- |
| September 4 | All Below | 0.014 | 0.0041 | 0.0323 | -- |
| September 5 | All Below | 0.015 | 0.0057 | 0.045 | -- |
| September 8 | All Below | 0.0193 | 0.0102 | 0.032 | |
| September 9 | All Below | 0.0261 | 0.015 | 0.0345 | |
| September 10 | All Below | 0.0211 | 0.0128 | 0.0218 | -- |
| September 11 | All Below | 0.016 | 0.0085 | 0.0202 | -- |
| September 12 | All Below | 0.008 | 0.002 | 0.0191 | -- |
| September 14 | All Below | 0.0172 | 0.0116 | 0.0165 | -- |
| September 15 | All Below | 0.0515 | 0.0046 | 0.0453 | -- |
| September 16 | All Below | 0.0176 | 0.0038 | 0.0156 | -- |
| September 17 | All Below | 0.0158 | 0.0052 | 0.0147 | -- |
| September 18 | All Below | 0.0239 | 0.0147 | 0.02 | -- |
| September 19 | All Below | 0.015 | 0.135 | 0.0175 | HAV-AIR2 levels not related to field activities. |
| September 21 | All Below | 0.0173 | 0.0101 | 0.0206 | -- |
| September 22 | All Below | 0.0179 | 0.0102 | 0.0263 | -- |
| September 23 | All Below | 0.0207 | 0.0094 | 0.03 | -- |
| September 24 | All Below | 0.0154 | 0.0044 | 0.005 | -- |
| September 25 | All Below | 0.0132 | 0 | 0.0154 | -- |
| September 26 | All Below | 0.016 | 0.001 | 0.0218 | -- |
| September 28 | All Below | 0.014 | 0.0154 | 0.0487 | -- |
| September 29 | All Below | 0.0152 | 0.0054 | 0.0157 | -- |
| September 30 | All Below | 0.0143 | 0.005 | 0.0152 | -- |
NA = Data not collected in accordance with plan
Particulates (milligrams per cubic meter)
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Air Monitoring - 2021 Alcoa East Plant Dock Area
Program includes particulate monitoring using real-time meters for particulates (or dust). The corrective action level has been established based on a level that is safe for the community. The actual monitoring results are compared to the corrective action level to determine if adjustments in construction are needed. The air monitoring locations and tabulated results are provided below. Monitoring is only performed when there is active work at this area.
2021 Air Particulate Data (Corrective Action Level = 0.150 milligram per cubic meter above upwind location)
| Monitoring Station ID (see figure) | ||||||
|---|---|---|---|---|---|---|
| Date | Action Level Check | EP-AIR1 | EP-AIR2 | EP-AIR3 | EP-AIR4 | Notes |
| September 1 | All Below | 0.037 | 0.0192 | 0.0205 | 0.027 | -- |
| September 2 | All Below | 0.0342 | 0.0179 | 0.0137 | 0.0252 | -- |
| September 3 | All Below | 0.028 | 0.0114 | 0.005 | 0.0188 | -- |
| September 4 | All Below | 0.0252 | 0.0166 | 0.005 | 0.019 | -- |
| September 15 | All Below | 0.0487 | 0.0428 | 0.0353 | 0.0442 | -- |
| September 16 | All Below | 0.0238 | 0.0096 | 0.0078 | 0.0174 | -- |
| September 17 | All Below | 0.025 | 0.0076 | 0.0103 | 0.0089 | -- |
| September 18 | All Below | 0.0292 | 0.0291 | 0.021 | 0.0183 | -- |
| September 26 | All Below | 0.0359 | 0.0179 | 0.0826 | 0.0227 | -- |
| September 29 | All Below | 0.0213 | 0.0083 | 0.009 | 0.0094 | -- |
| September 30 | All Below | 0.0256 | 0.0108 | 0.0084 | 0.0119 | -- |
NA = Data not collected in accordance with plan
Particulates (milligrams per cubic meter)
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Water Monitoring - 2021 River Remediation
Program includes turbidity monitoring using real-time meters for solids and PCB analytical testing at the water intake locations and total suspended solids (TSS) and PCB analytical testing at the river locations. Corrective action levels have been established based on levels that are safe for the community for both solids and PCBs. The actual monitoring results will be compared to the corrective action levels to determine if adjustments in construction are needed. The water locations and tabulated results are provided below.
Monitoring was performed for 50+ days with half of these days including capping only and the other half with capping and dredging. PCBs were not detected in any samples during routine monitoring. Water monitoring for PCBs was discontinued in June based on these results. Monitoring for solids will continue through the end of construction.
2021 Water Column Total Suspended Solids Data (Corrective Action Level = 100 mg/L above WC-UP Level at WC-SLR)
| Monitoring Station ID (see figure) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Date | Action Level Check | WC-UP1 | WC-NF2 | WC-NF | WC-NF3 | WC-MOUTH | WC-SLR | Notes |
| September 1 | All Below | Below detectable levels | 43 | Below detectable levels | NA | NA | Below detectable levels | -- |
| September 2 | All Below | Below detectable levels | 34 | 13 | NA | NA | Below detectable levels | -- |
| September 3 | All Below | Below detectable levels | NA | 27 | NA | NA | 5.7 | -- |
| September 4 | All Below | 6.1 | NA | 27 | NA | NA | 11 | -- |
| September 7 | All Below | Below detectable levels | Below detectable levels | 13 | NA | 17 | 6.2 | -- |
| September 8 | All Below | Below detectable levels | 7.4 | 81 | NA | 11 | Below detectable levels | -- |
| September 9 | All Below | Below detectable levels | 5.2 | 73 | NA | 24 | 7.2 | -- |
| September 10 | All Below | Below detectable levels | 6.8 | 34 | NA | 33 | 7.5 | -- |
| September 11 | All Below | Below detectable levels | 72 | 77 | NA | 27 | Below detectable levels | -- |
| September 13 | All Below | Below detectable levels | 6.0 | 20 | NA | 22 | Below detectable levels | -- |
| September 14 | All Below | Below detectable levels | 58 | 47 | NA | 18 | Below detectable levels | -- |
| September 15 | All Below | Below detectable levels | NA | 24 | NA | NA | 8.4 | -- |
| September 16 | All Below | Below detectable levels | NA | 37 | NA | NA | 6.3 | -- |
| September 17 | All Below | Below detectable levels | 64 | 50 | NA | NA | 8.4 | -- |
| September 18 | All Below | Below detectable levels | NA | 23 | NA | 28 | 10 | -- |
| September 20 | All Below | Below detectable levels | NA | 20 | NA | 11 | Below detectable levels | -- |
| September 21 | All Below | Below detectable levels | NA | 47 | NA | 6.8 | Below detectable levels | -- |
| September 22 | All Below | Below detectable levels | NA | 31 | NA | 9.0 | Below detectable levels | -- |
| September 23 | All Below | Below detectable levels | NA | 45 | NA | 10 | 5.5 | -- |
| September 24 | All Below | Below detectable levels | NA | 48 | NA | 9.7 | Below detectable levels | -- |
| September 25 | All Below | Below detectable levels | 11 | 43 | NA | NA | Below detectable levels | -- |
| September 27 | All Below | Below detectable levels | NA | 10 | NA | 9.8 | 5.1 | -- |
| September 28 | All Below | Below detectable levels | NA | 25 | NA | 8.7 | 5.0 | -- |
| September 29 | All Below | Below detectable levels | NA | 42 | NA | 7.5 | 5.7 | -- |
| September 30 | All Below | Below detectable levels | NA | 30 | NA | Below detectable levels | Below detectable levels | -- |
Total Suspended Solids (TSS; milligrams per liter)
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2021 Water Intake Turbidity Data (Corrective Action Level = 25 NTU above Baseline Level)
| Monitoring Station ID (see figure) | |||||
|---|---|---|---|---|---|
| Date | Action Level Check | IN-AE-RAW | IN-SRMT-RAW | IN-SRMT-FIL | Notes |
| September 1 | All Below | 2.8 | 1.4 | 0.0 | -- |
| September 2 | All Below | 1.8 | 1.8 | 0.1 | -- |
| September 3 | All Below | 1.5 | 1.5 | 0.0 | -- |
| September 4 | All Below | 1.8 | 1.4 | 0.0 | -- |
| September 7 | All Below | 3.2 | 1.5 | 0.0 | -- |
| September 8 | All Below | 2.4 | 3.0 | 0.1 | -- |
| September 9 | All Below | 3.7 | 1.6 | 0.0 | -- |
| September 10 | All Below | 2.9 | 4.1 | 0.1 | -- |
| September 11 | All Below | 1.1 | 1.3 | 0.0 | -- |
| September 13 | All Below | 0.9 | 1.5 | 0.0 | -- |
| September 14 | All Below | 1.2 | 1.5 | 0.0 | -- |
| September 15 | All Below | 1.6 | 1.6 | 0.0 | -- |
| September 16 | All Below | 0.9 | 1.6 | 0.1 | -- |
| September 17 | All Below | 2.0 | 1.6 | 0.0 | -- |
| September 18 | All Below | 0.8 | 1.8 | 0.2 | -- |
| September 20 | All Below | 1.3 | 1.6 | 0.0 | -- |
| September 21 | All Below | 0.8 | 1.5 | 0.0 | -- |
| September 22 | All Below | 1.1 | 1.5 | 0.1 | -- |
| September 23 | All Below | 2.2 | 1.7 | 0.1 | -- |
| September 24 | All Below | 0.8 | 1.5 | 0.1 | -- |
| September 25 | All Below | 0.9 | 1.6 | 0.0 | -- |
| September 27 | All Below | 1.0 | 1.5 | 0.0 | -- |
| September 28 | All Below | 1.3 | 1.5 | 0.2 | -- |
| September 29 | All Below | 1.0 | 1.5 | 0.1 | -- |
| September 30 | All Below | 0.8 | 1.5 | 0.0 | -- |
Turbidity (Nephelometric Turbidity Unit)
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