ATSDR - Health Consultation - Mercury in St. Paul Residence, St. Paul, Ramsey County, Minnesota

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HEALTH CONSULTATION

MERCURY IN ST. PAUL RESIDENCE
ST. PAUL, RAMSEY COUNTY, MINNESOTA

ATTACHMENT 2: LUMEX READINGS (cont.)

Lumex Readings, XXXXXXXXXXXXXXXX, June 21, 2001

The Lumex was operated by Judy Grant, Xcel Energy Environmental Services
- readings below were recorded by Sarah Meyers from Weston and Judy Grant

Location of Readings
Lumex Readings

ng/m3

Max* Ave R (%)

Readings taken at 10:15 AM by Judy Grant using the Lumex: (Sarah Meyers recording readings)

Outside - on back steps, no hose 32 160

Outside - in yard, no hose 7 40

Outside - in yard, with hose attached 4 16

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 202 198 4

1^st Floor - 4' above floor at the top of the stairs with containment open 370 337 14

Basement - 4' above the floor in front of the stairs 406 396 5

Basement - 4' above the floor in middle of the basement between the two posts - basement ambient 442 430 4

Basement - 4' above the floor in the NE corner where the device was removed 453 439 8

Basement - 4' above the floor over the area where the wooden partition had been removed 516 511 2

Basement - 2" above the floor over the area where the wooden partition had been removed 609 572 12

Basement - 5.5' above floor in the NE corner on the wall where higher levels were detected before 765 687 22

Basement - scan of NE corner wall patch ~520

Basement - 4' above the floor in where the old wash tub had been removed (new not yet installed) 473 468 2

Basement - 3" above the floor drain 486 469 8

Basement - 1" to 2" from drain cover 515 497 6

Basement - 1" to 2" from cement patch by east post, north side of patch 702 659 10

Basement - 5" from indents in floor near NE corner 1,878 1,433 67

Basement - 5" from the floor in the NE corner 1,287 958 58

Basement - 4' above the floor in the middle of the basement between the two posts - basement ambient 497 476 10

Basement - 1" to 2" above new cement at the foot of the stairs 400 - 500

Basement - 1" to 2" above new cement at the foot of the stairs, between cement patches 1,500 - 2,100

Basement - 4' above the floor west side of the hot water heater, east of furnace 527 513 13

Basement - 4' above the floor east side of the hot water heater 517 493 10

Readings taken at 12:26 PM by Judy Grant using the Lumex: (Judy Grant recording readings)

1^st Floor - 4' above floor in middle of kitchen, gas off, door and window closed, air movement coming from upstairs to basement through kitchen 10
8
9
8 9
8
8
8 6
16
14
6

1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - Gas Off 12
11
11 11
10
10 24
22
9

1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - Gas/Flame On 12
13
12
10
10 10
11
11
10
9 36
27
30
15
18

1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - As Gas Turned Off 13 11 22

1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - Gas On No Flame 47 31 109

1^st Floor - just inside open oven door - Gas Off 7 7 16

1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees 8 7 14

1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees - smelling gas 28 27 3

1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees - not smelling gas air becoming hot (may be exceeding) 49
123 41
96 41
50

1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees - holding hose higher because of heat from oven (may be 120
90 112
80 11
35

Readings taken at around 4:00 PM by Judy Grant using the Lumex: (Sarah Meyers & Mueller Pipeliners recording)

Basement - 4' above the floor east side of the hot water heater 94 86 27

Basement - east side of the hot water heater - inside bag, near trap, trap ON 150
179
216 120
175
206 38
4
14

Basement - east side of the hot water heater - inside bag, near end of pipe where trap had been, trap Off 236
175
155 215
154
137 18
28
23

Basement - east side of the hot water heater - inside bag, inside trap which was not attached to the pipe 287
263 271
259 12
2

Basement - 4' above the floor east side of the hot water heater 312 240 64

Basement - east side of the hot water heater - inside bag, near end of pipe where trap had been, trap OFF Taken after Mueller put gas 317
311 309
300 6
7

* - The maximum value is the maximum of the three ten second averages which are recorded by the Lumex. The average of these is the average value provided and the R(%) is the variability which applies to this average.

Lumex Readings, XXXXXXXXXXXXXXXXX, June 22, 2001

The Lumex was operated by Judy Grant, Excel Energy Environmental Services
- readings below were recorded by XXXXXXXXXXXX and Judy Grant

Location of Readings

Lumex Readings

ng/m3

Max* Ave R (%)

Readings taken at 12:15 PM by Judy Grant using the Lumex: (XXXXXXXXXXXXX recording readings)

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 143
146 141
141 3
5

1^st Floor - 4' above the floor at the top of the stairs 152 149 3

Basement - 4' above the floor, in front of the stairs 166 165 1

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 185
176 173
174 1
2

Basement - 4' above the floor, 3' in front of the east corner of the firebox on the edge of the epoxy 180 179 1

Basement - 4' above the floor, under the middle of the stairs 180
189 179
182 1
7

Basement - 4' above the front right corner of the washing machine 209 206 3

Basement - inside washer 235 228 8

Basement - 4' above the floor drain area at the edge of the epoxy 232 217 16

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 207 203 3

Basement - 4' above the floor, in the middle of the basement between the two posts after walking around 215 210 4

Basement - 4' above the floor, 3' west of the over the area where the wooden partition had been removed 211 209 2

Basement - 4' above the floor, 2' west of the over the area where the wooden partition had been removed 215 212 3

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 172 168 4

1^st Floor - 4' above the floor in the dining room above the dining room table - dining room ambient 119 113 9

1^st Floor - 4' above the floor in the middle of the living room in front of the fireplace 115 115 1

Stairs 1 to 2 - 4' above the floor on the landing of the stairs 106 106 0

2^nd Floor - 4' above the floor at the top of the stairs by the bathroom 102 101 1

2^nd Floor - 4' above the floor in the SE bedroom near the corner of the bed 101 100 2

2^nd Floor - 4' above the floor in the sun porch 103 100 6

2^nd Floor - 4' above the floor in the NE bedroom, over SW corner of bed 95 92 5

2^nd Floor - 4' above the floor in the hallway 100 99 1

2^nd Floor - 4' above the floor in the NW bedroom 103 103 0

Readings taken at 2:15 PM by Judy Grant using the Lumex: (Judy Grant recording readings)

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 173 171 1

1^st Floor - 4' above the floor in the dining room above the dining room table - dining room ambient 162 156 8

1^st Floor - 4' above the floor in the middle of the living room in front of the fireplace 148 144 6

2^nd Floor - 4' above the floor in the SE bedroom near the corner of the bed 127 127 0

2^nd Floor - 4' above the floor in the sun porch 119 118 1

2^nd Floor - 4' above the floor in the NE bedroom, over SW corner of the bed 112 111 1

Basement - 4' above the floor, in front of the stairs 214 204 10

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 235 228 6

Basement - 4' above the floor, 3' in front of the east corner of the firebox on the edge of the epoxy 197 193 4

Readings taken at around 5:00 PM by Judy Grant using the Lumex: (Judy Grant recording readings)

Outside - on south steps 57 40 86

Outside - foot of the south steps 3 1 121

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 113 110 8

1^st Floor - 4' above the floor in the dining room above the dining room table - dining room ambient 125 124 0

1^st Floor - 4' above the floor in the middle of the living room in front of the fireplace 134 132 1

2^nd Floor - 4' above the floor in the SE bedroom near the corner of the bed 127 125 1

2^nd Floor - 4' above the floor in the sun porch 119 118 1

2^nd Floor - 4' above the floor in the NE bedroom, over SW corner of bed 108 108 1

Basement - 4' above the floor, in front of the stairs 256 244 9

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 261 256 6

Basement - 4' above the floor, 3' in front of the east corner of the firebox on the edge of the epoxy 238 235 3

Basement - 4' above the floor, near the drier where the certification sample was set up 272
267 270
265 1
1

Readings taken at 8:00 PM by Judy Grant using the Lumex: (Judy Grant recording readings)

Outside - in yard 5
3 4
2 47
47

Outside - foot of the south steps 8 6 76

Outside - on south steps near certification sample 15 9 114

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 94
99 93
96 3
4

1^st Floor - 4' above the floor in the dining room above the dining room table - dining room ambient 106 105 0

1^st Floor - 4' above the floor in the dining room, SE corner of table near certification sample (done) 107 102 9

1^st Floor - 4' above the floor in the middle of the living room in front of the fireplace 120 119 2

1^st Floor - 4' above the floor in the living room, north side of table near certification sample (done) 121 121 0

2^nd Floor - 4' above the floor in the SE bedroom near the corner of the bed 118 115 4

2^nd Floor - 4' above the floor in the SE bedroom, NE corner of the dresser near certification sample (done) 121 121 1

2^nd Floor - 4' above the floor in the sun porch 111
100 108
97 6
7

2^nd Floor - 4' above the floor in the NE bedroom, over SW corner of bed 116 114 4

2^nd Floor - 4' above the floor in the NE bedroom, over NE corner of bed near certification sample (done) 113 112 0

Basement - 4' above the floor, in front of the stairs 233
241 231
238 1
1

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 245
249 241
245 4
2

Basement - 4' above the floor, 3' in front of the east corner of the firebox on the edge of the epoxy 262
265 258
260 4
5

Basement - 4' above the floor, near the drier where the certification sample was set up 259
256 251
252 7
3

Lumex Readings, XXXXXXXXXXXXXXXX, June 25, 2001

The Lumex was operated by Judy Grant, Xcel Energy Environmental Services
# NAME?

Location of Readings
Lumex Readings

ng/m3

Max* Ave R (%)

Outside - with tube on (prior to bag sampling) 5 5 6

Outside - without tube on (prior to bag sampling) 8
6 7
6 31
20

Outside - with tube on (after bag sampling) 10 10 6

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 20
14
22
12 17
12
16
11 41
21
55
9

1^st Floor - 4' above the floor in the dining room above the dining room table - dining room ambient 33
44
20 32
37
18 8
32
25

1^st Floor - 4' above the floor in the middle of the living room in front of the fireplace 29
25 26
22 16
21

2^nd Floor - 4' above the floor at the top of the stairs 7
7 7
7 6
6

2^nd Floor - 4' above the floor in the SE bedroom near the corner of the bed 6
8 6
7 2
11

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 5
7
7 5
6
7 4
16
5

Basement - 4' above the floor, in front of the stairs 170
175 169
175 1
0

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 199
194 184
191 13
4

Basement - 4' above the floor in the NE corner where the device was removed 188
188 183
185 5
3

Basement - 4' above the floor over the area where the wooden partition had been removed 192 189 2

Basement - 5" above the floor over the area where the wooden partition had been removed 227
234 218
232 9
2

Basement - 4' above the paint in the storage area to the west at the bottom of the stairs 142 137 5

Basement - 4' above the floor over the new wash tub 183 183 0

Basement - 5" above the floor drain 213 208 5

Basement - inside the drier 190 189 1

Basement - 5" from cement patch by east post, NE side of patch 250 249 2

Lumex Readings, XXXXX, July 3, 2001

The Lumex was operated by Carol Hubbard from the MPCA, readings below were recorded by Judy Grant

Location of Readings
Lumex Readings

ng/m3

Max* Ave R (%)

Outside 9,7 9,6 15,16

Garage - 4' above the floor in the middle of the garage 21 20 1

Garage - 4' above the floor in the SW corner, 4' from each wall (drums had been stored in this area) 17 16 5

Garage - 4' above the floor in the NW corner, 4' from each wall 16 15 10

Garage - 3" to 6" above the floor in the middle of the garage 17 16 3

Garage - 3" to 6" above the floor in the SW corner, 4' from each wall (drums had been stored in this area) 18 17 19

Garage - in bag of detergent (106 ng/m3 previously) 45 44 7

Garage - in bag of old tools (433 ng/m3 previously) 17 17 4

Garage - in bag of chalk tools (313 & 309 previously) 19 18 8

Garage - in blue garbage can that contained the new tool (161 and 29 previously) 16 15 3

Garage - above the 45s (25 previously) 16 15 4

Garage - 1" to 2" from brooms which were used in the basement before the spill on 6/5/01 14 14 3

Garage - 1" to 2" from new over yellow plastic disposable boots from Weston on table 14 13 5

Garage - 1" to 2" from partial roll of red duct tape from Weston on table 17 16 14

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 20 18 13

Basement - 4' above the floor, in front of the stairs 143 142 0

Basement - 4' above the floor, in the middle of the basement between the two posts - basement ambient 153 152 1

Basement - 4' above the floor in the NE corner where the device was removed 162 159 4

Basement - 4' above the floor, 5' in front of the NE corner where the device was removed 175 174 1

Basement - 4' above the floor over the area where the wooden partition had been removed 171 170 1

Basement - 5" above the floor, in front of the stairs 146 144 2

Basement - 5" above the floor, in the middle of the basement between the two posts - basement ambient 179 175 4

Basement - 5" above the floor in the NE corner where the device was removed 225 212 9

Basement - 5" above the floor, 5' in front of the NE corner where the device was removed 189 186 3

Basement - 5" above the floor over the area where the wooden partition had been removed 181 171 9

Basement - 5" above the floor 5' in front of the firebox 157 149 7

Basement - 4' above the floor 5' in front of the firebox 157 150 8

Basement - 1" above the floor drain 164 162 1

Basement - 4' above the floor drain 159 157 3

Basement - 5.5' above the floor in the NE corner where the device was, 1" from the lip which was removed 189 181 9

Basement - 5" above the floor in the NE corner, 4' from each wall 189 180 10

Basement - 5" above the NE corner of the drier where the certification sample was taken 165 163 2

Basement - in washer 164 162 2

Basement - in drier 144 143 1

Basement - 4' above the floor of the paint storage area to the west of the foot of the stairs 138 138 0

Basement - 5" from cement patch by east post, north side of patch 199 188 10

Lumex Readings, XXXXX, July 13, 2001

The Lumex was operated by Carl Herbrandson from the Department of Health
Readings were recorded by Judy Grant and observed by XXXXX.

Location of Readings Lumex Reading
ng/m3

Ave* R(%)

1^st Floor - 4' above floor in middle of kitchen - kitchen ambient 8 25

1^st Floor - in the pots on the lowest shelf, open shelving in the kitchen on the west wall 16 50

1^st Floor - 6" above the floor in the middle of the living room in front of the fireplace 2 2

Basement - 1' above the floor, in front of the stairs 93 8

Basement - 1' above the floor 1' north of the area where the wooden partition had been removed 128 13

Basement - 1' above the floor in the NE corner where paint was removed, 4' from each wall 125 15

Basement - 1' above the floor in the NE corner where the device was removed 269 10

Basement - 4' above the floor in the NE corner where the device was removed 154 11

Basement - 1' above the floor drain 119 2

Basement - 2" from the east wall, 5' above the floor where the wooden partition had been removed 126 3

Basement - 4' above the floor, in the middle of the basement between the two posts-basement ambient 120 1

Basement - in washer 154 13

Basement - in drier 106 2

* - The average values is the average of the three ten second averages which were recorded by the Lumex. The R(%) is the variability which applies to this average.

ATTACHMENT 3: LETTER

July 11, 2001

Ms. XXXXXXXX
XXXXXXXXXXXXXXXXX
St. Paul, Minnesota 551XX

Dear Ms. XXXX:

This letter is written in response to your request for a report on the mercury contamination in your house.

We were informed that in early June service personnel under contract with Xcel Energy, removed a piece of equipment containing mercury from your natural gas line. It was reported that a small amount of mercury was spilled on your basement floor. Xcel hired BayWest to cleanup the mercury spill. Mercury vapor in the basement was measured with a Jerome Meter after the cleaning process was complete. The maximum Jerome reading after the cleanup was reported to be 349,000 ng/m³. This high concentration was not expected and therefore, questions about possible interference from ammonia in a cat litter box were raised. It was confirmed that kitty litter and other odorous material can interfere with correct readings on the Jerome meter.

Carol Hubbard, from the Minnesota Pollution Control Agency, and I accompanied Xcel Energy into the house on the afternoon of June 8th. Using a Lumex Mercury Vapor Analyzer, mercury levels were measured outside the house, on the main floor, and in the basement. Mercury concentrations in ambient air outside the house fluctuated between less than 30 ng/m³ and more than 150 ng/m³. The instrument readings appeared to stabilize below 30 ng/m³ when the instrument was held in the shade. Typical mercury concentrations outdoors are less than 10 ng/m³.

We entered the house through the back door into the kitchen and measured the mercury concentration to be between 1,500 and 3,500 ng/m³ in the kitchen. The mercury concentration increased on the stairs to the basement. Mercury concentrations in the basement ranged from 20,000 to 51,000 ng/m³. The Lumex is not thought to be sensitive to ammonia, and readings near the kitty litter box were consistent with what was encountered in other areas of the basement. According to the manufacturer, the sensitivity of the Lumex flattens out as mercury concentrations in air approach 50,000 ng/m³. Therefore, the actual mercury concentrations in air in the basement may have been higher in some areas.

Exposure to mercury concentrations above 6,000 ng/m³ for a long time (years) has been associated with hand tremors; increases in memory disturbances and other neurological effects. MDH advised Xcel that you, the owner of the house, be temporarily removed from the house until the house was re-cleaned to levels below the EPA Reference Concentration for mercury of 300 ng/m³. The RfC is considered protective for the general public, including sensitive sub-populations such as children, for life-time exposures. It is my understanding that you were relocated for the duration of most of the cleanup.

According to Xcel Energy, on Wednesday, June 13 contractors experienced in cleaning up mercury spills in basements (Weston, Chicago, IL) began cleanup operations. Cleaning methods included use of a mercury cleanup (amalgamating) kit, washing and scraping. Cleanup continued until all levels of mercury vapor, except those near the floor drain, were below the low-end calibration limit (1,000 ng/m³) on a Nippon mercury vapor survey meter. On Friday afternoon they sealed the floor with an enamel paint. Friday night the house was sealed up and heated to about 80º F.

On Saturday, June 16, I accompanied you and Xcel on what was to be a final inspection prior to clearance, or approval of reoccupancy. Mercury vapor concentrations on the main floor of your house were between 265 and 589 ng/m³. Mercury concentrations in the basement ranged from 881 ng/m³ to 1231 ng/m³.

Areas of the floor near the bottom of the basement stairs and a small partition on the north side of the eastern wall, as well as the washtub drain, were subsequently identified as areas which may be the source of some mercury vapor. The washtub and partition were removed. Some concrete was also excavated from the floor in areas where high mercury readings were recorded. Concrete patches were put in the floor and clear epoxy was used to seal these and other areas of the floor.

On June 20 Lumex sampling showed mercury vapor levels throughout the house to be below 300 ng/m³. On June 22, final clearance sampling was conducted by Franklin Dickson, Certified Industrial Hygenist, Applied Environmental Services, Inc. Following established protocols, the house was heated to between 75 and 80º F for two hours prior to drawing air samples over a 6 hour period. These sampling protocols were developed by the U.S. Environmental Protection Agency, and the Agency for Toxic Substances and Disease Control, a part of the U.S. Public Health Service.

Mercury concentrations throughout the house were below the identified level-of-concern of 300 ng/m³. Analytical results (Braun InterTech) are listed in the table below.

Sample #	Location	Mercury Concentration
1.	Living Room	210 ng/m³
2.	Dining Room	180 ng/m³
3.	Master Bedroom	140 ng/m³
4.	Second Bedroom	100 ng/m³
5.	Basement	270 ng/m³
6.	Outdoors - back porch	less than 100 ng/m³

MDH recommends that follow-up sampling be performed in the future to assure that these concentrations decrease over time, as expected.

MDH has concluded:

Xcel and Weston have certified that the cleanup was conducted using the best methods currently employed in mercury cleanups;
Applied Environmental Services and Braun Intertech certified that clearance data was acquired and analyzed according to protocols established by the EPA and ATSDR
The cleanup was successful in reducing potential exposures to mercury in air to levels below health concern.

In the next month, I will be writing a larger technical report on this incident. If I can be of further assistance, please let me know.

Sincerely,

Carl Herbrandson, Ph.D.
Site Assessment and Consultation Unit

cc: Judy Grant, Xcel Energy
Edward Swain, Ph.D., MPCA
Carol Hubbard, MPCA

CH:rlk

ATTACHMENT 4: FINAL CLEARANCE SAMPLING PROTOCOL FOR MERCURY WITHIN A RESIDENTIAL HOME

This protocol is designed to be implemented once the on-site remediation service feels that the environment has been adequately cleaned and for the sole purpose of gathering valid data to be further assessed by and applicable governmental authorities.

Quantitative Sampling:

Prior to sampling period, the indoor temperature of home environment should be determined and documented. Temperature should be at least 75-80º F for a minimum of 60 minutes prior to commencing sampling.

Following the heating and venting period, the house should be closed up (windows, doors shut) for a minimum of 60 minutes after desired temperature of 75-80º F to allow for equilibrium temperatures to be achieved. Screen test area using screening protocol prior to final clearance. If there are readings above 0.0003 mg/m³ with continuous reading instruments, identify areas requiring recleaning, including additional ventilation. Record all readings on log sheet.

The hopcalite test (sample attached)(SKC HYDRAR), or other approved method, will be used to provide final clearance if the detected mercury vapors were confined and there were no detectable levels in living areas prior to cleanup.

If instrument testing is not used, final clearance sampling shall be performed utilizing USEPA Response Team SOP #1827 with a modified NIOSH 6009 method, 5/13/99 or OSHA ID-140. The pump will be calibrated to 0.5 liters/min. or less, or as defined by the method. The media utilized will be hopcalite or approved equivalent (e.g. Hydrar).

One (1) field blank (opened in field and handled with samples) shall be taken for each home sampled. In addition, two (2) unopened blanks from the same lot shall be retained and submitted with the corresponding field blank.

A minimum of five (5) samples should be taken throughout the home. All children's bedrooms and play areas shall be tested. In addition, one (1) outdoor reference sample shall be taken outside.

A floor map of the home shall be drawn to document the locations selected for sampling. The floor map shall include occupancy information identifying the rooms sampled (i.e., children's bedrooms, play areas, etc.)

The sample media shall be set at a height of between three to four (3-4) feet from ground level to represent a breathing zone sample.

The sample time should be approximately eight (8) hours or as necessary to obtain a detection limit less than 0.0003 mg/m³. Periodic pump flow checks shall be performed and documented throughout the sampling period (minimum of 2).

Upon completion of the sampling, samples shall be handled and submitted to an AIHA accredited laboratory for analysis utilizing proper chain of custody procedures. Sample turnaround time will be determined in advance by .

The analytical method to be utilized should be USEPA Response Team SOP #1827 with a modified NIOSH 6009 method, 5/13/99 or OSHA ID-140.

Upon completion of the final clearance test and receipt of results, the sampling firm will prepare a clearance sampling report and submit to for further review and follow-up action. The report shall consist of, at a minimum:

Floor map documenting the locations of samples taken and corresponding results, including a description of the occupancy of the rooms tested.
Sample data sheets documenting either the instrument readings or the media number, sample location, pump flow (with checks), final volume sampled, sample duration and any remarkable field notes.
Sample results as submitted by the laboratory corresponding to provided sample data sheets, as applicable.
Copy of this sampling protocol.

The clearance sampling report will be submitted to USEPA, ATSDR and the IDPH for their review and determination of the effectiveness of the cleanup. A letter from IDPH to the residents will provide the final result of the consultation between USEPA, ATSDR and IDPH.

Table of Contents

Agency for Toxic Substances and Disease Registry, 1825 Century Blvd, Atlanta, GA 30345
Contact CDC: 800-232-4636 / TTY: 888-232-6348

Department of Health and Human Services

Location of Readings	Lumex Readings
	ng/m3
	Max*	Ave	R (%)
Readings taken at 10:15 AM by Judy Grant using the Lumex: (Sarah Meyers recording readings)
Outside - on back steps, no hose		32	160
Outside - in yard, no hose		7	40
Outside - in yard, with hose attached		4	16
1^st Floor - 4' above floor in middle of kitchen - kitchen ambient	202	198	4
1^st Floor - 4' above floor at the top of the stairs with containment open	370	337	14
Basement - 4' above the floor in front of the stairs	406	396	5
Basement - 4' above the floor in middle of the basement between the two posts - basement ambient	442	430	4
Basement - 4' above the floor in the NE corner where the device was removed	453	439	8
Basement - 4' above the floor over the area where the wooden partition had been removed	516	511	2
Basement - 2" above the floor over the area where the wooden partition had been removed	609	572	12
Basement - 5.5' above floor in the NE corner on the wall where higher levels were detected before	765	687	22
Basement - scan of NE corner wall patch	~520
Basement - 4' above the floor in where the old wash tub had been removed (new not yet installed)	473	468	2
Basement - 3" above the floor drain	486	469	8
Basement - 1" to 2" from drain cover	515	497	6
Basement - 1" to 2" from cement patch by east post, north side of patch	702	659	10
Basement - 5" from indents in floor near NE corner	1,878	1,433	67
Basement - 5" from the floor in the NE corner	1,287	958	58
Basement - 4' above the floor in the middle of the basement between the two posts - basement ambient	497	476	10
Basement - 1" to 2" above new cement at the foot of the stairs	400 - 500
Basement - 1" to 2" above new cement at the foot of the stairs, between cement patches	1,500 - 2,100
Basement - 4' above the floor west side of the hot water heater, east of furnace	527	513	13
Basement - 4' above the floor east side of the hot water heater	517	493	10
Readings taken at 12:26 PM by Judy Grant using the Lumex: (Judy Grant recording readings)
1^st Floor - 4' above floor in middle of kitchen, gas off, door and window closed, air movement coming from upstairs to basement through kitchen	10 8 9 8	9 8 8 8	6 16 14 6
1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - Gas Off	12 11 11	11 10 10	24 22 9
1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - Gas/Flame On	12 13 12 10 10	10 11 11 10 9	36 27 30 15 18
1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - As Gas Turned Off	13	11	22
1^st Floor - 5" from front right burner of stove, oven open, 4" above surface of stove - Gas On No Flame	47	31	109
1^st Floor - just inside open oven door - Gas Off	7	7	16
1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees	8	7	14
1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees - smelling gas	28	27	3
1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees - not smelling gas air becoming hot (may be exceeding)	49 123	41 96	41 50
1^st Floor - just inside open oven door - Gas On and oven set at 205 degrees - holding hose higher because of heat from oven (may be	120 90	112 80	11 35
Readings taken at around 4:00 PM by Judy Grant using the Lumex: (Sarah Meyers & Mueller Pipeliners recording)
Basement - 4' above the floor east side of the hot water heater	94	86	27
Basement - east side of the hot water heater - inside bag, near trap, trap ON	150 179 216	120 175 206	38 4 14
Basement - east side of the hot water heater - inside bag, near end of pipe where trap had been, trap Off	236 175 155	215 154 137	18 28 23
Basement - east side of the hot water heater - inside bag, inside trap which was not attached to the pipe	287 263	271 259	12 2
Basement - 4' above the floor east side of the hot water heater	312	240	64
Basement - east side of the hot water heater - inside bag, near end of pipe where trap had been, trap OFF Taken after Mueller put gas	317 311	309 300	6 7

Location of Readings	Lumex Reading ng/m3
Location of Readings	Ave*	R(%)
1^st Floor - 4' above floor in middle of kitchen - kitchen ambient	8	25
1^st Floor - in the pots on the lowest shelf, open shelving in the kitchen on the west wall	16	50
1^st Floor - 6" above the floor in the middle of the living room in front of the fireplace	2	2
Basement - 1' above the floor, in front of the stairs	93	8
Basement - 1' above the floor 1' north of the area where the wooden partition had been removed	128	13
Basement - 1' above the floor in the NE corner where paint was removed, 4' from each wall	125	15
Basement - 1' above the floor in the NE corner where the device was removed	269	10
Basement - 4' above the floor in the NE corner where the device was removed	154	11
Basement - 1' above the floor drain	119	2
Basement - 2" from the east wall, 5' above the floor where the wooden partition had been removed	126	3
Basement - 4' above the floor, in the middle of the basement between the two posts-basement ambient	120	1
Basement - in washer	154	13
Basement - in drier	106	2