Tacoma Tarpits
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United States Environmental Protection Agency
Region 10 Superfund: Commencement Bay - Nearshore Tideflats
Serving the people of Alaska, Idaho, Oregon, Washington and 270 Native Tribes

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Tacoma Tarpits


Decision Documents
Ground Water Monitoring

Table 1 below contains location information for most of the 70 groundwater wells at the Tacoma Tarpits site. Groundwater sampling data was collected between 3/2/83 to 12/15/98.

Table 1: Monitoring Well Location Information

State Plane State Plane
WellDescriptionPrimary Station Code
Longitude
(NAD 1983)
Latitude
(NAD 1983)
Easting
(ft)
Northing
(ft)
ZoneDatum
AGI-1DAdjacent se bndry of siteWAD980723795001
-122.41500092
47.24564362
1164821.43
703150.38
WASNAD83
AGI-2MAbandoned, frmrly adjacent se bndry of siteWAD980723795003
-122.41485596
47.24574280
1164860.00
703186.50
WASNAD83
AGI-2SAbandoned, frmrly adjacent se bndry of siteWAD980723795002
-122.41484833
47.24571609
1164860.34
703176.19
WASNAD83
AGI-3MDestroyed/lost during rr track constructionWAD980723795004
-122.41733551
47.24522400
1164239.43
703012.44
WASNAD83
AGI-3SDestroyed/lost during rr track constructionWAD980723795005
-122.41729736
47.24522781
1164248.46
703013.19
WASNAD83
AGI-4MAdjacent to western bndry, north half of siteWAD980723795006
-122.42227173
47.24799728
1163037.04
704052.53
WASNAD83
AGI-4SAdjacent to western bndry, north half of siteWAD980723795007
-122.42229462
47.24800491
1163033.12
704056.04
WASNAD83
AGI-5MAdjacent to eastern bndry, south half of siteWAD980723795008
-122.41559601
47.24785614
1164693.43
703961.66
WASNAD83
AGI-5SAdjacent to eastern bndry, south half of siteWAD980723795009
-122.41558838
47.24784470
1164696.62
703957.80
WASNAD83
AGI-6MAbandoned, frmrly adjacent northern bndryWAD980723795010
-122.41954803
47.25006485
1163732.08
704790.92
WASNAD83
AGI-6SAbandoned, frmrly adjacent northern bndryWAD980723795011
-122.41956329
47.25007248
1163728.63
704793.03
WASNAD83
AGI-7SAbandoned, frmrly adjacent to s bndryWAD980723795012
-122.41567878
47.24540492
0.00
0.00
AGI-8SAbandoned, frmrly central part of siteWAD980723795013
-122.41845664
47.24743268
0.00
0.00
AGI-9SAbandoned, frmrly adjacent to east bndrWAD980723795018
-122.41687328
47.24776602
0.00
0.00
AGI-10SAbandoned, frmrly center, northern half of siteWAD980723795019
-122.41962335
47.24862712
0.00
0.00
AGI-11SAbandoned, frmrly center, southern half of siteWAD980723795020
-122.41770661
47.24604379
0.00
0.00
AGI-12MAbandoned, frmrly adjacent to southwestern bndryWAD980723795021
-122.41947174
47.24600220
1163715.31
703308.19
WASNAD83
AGI-12SAbandoned, frmrly adjacent to southwestern bndryWAD980723795022
-122.41951752
47.24601746
1163703.50
703314.12
WASNAD83
AGI-13MAbandoned, frmrly adjacent to northern bndryWAD980723795014
-122.42122650
47.24984360
1163314.49
704719.36
WASNAD83
AGI-13M(R)Replacement well, nw corner of siteWAD980723795068
0.00000000
0.00000000
0.00
0.00
AGI-13SAbandoned, frmrly adjacent to northern bndryWAD980723795015
-122.42124176
47.24983978
1163310.25
704718.62
WASNAD83
AGI-13S(R)Replacement well, nw corner of siteWAD980723795070
0.00000000
0.00000000
0.00
0.00
AGI-14MAbandoned, frmrly adjacent to northeastern bndryWAD980723795016
-122.41772461
47.24915314
1164177.60
704447.48
WASNAD83
AGI-14M(R)Replacement well, adjacent to northeastern bndryWAD980723795069
0.00000000
0.00000000
0.00
0.00
AGI-14SAdjacent to northeastern bndryWAD980723795017
-122.41773224
47.24913406
1164175.11
704440.73
WASNAD83
AGI-15MPresumed abandoned, frmrly south side of siteWAD980723795023
-122.41548432
47.24487715
0.00
0.00
C-1FORMER CHEVRON FACILITY, NW OF SITEWAD980723795040
-122.42372131
47.24953461
1522568.38
704676.43
WASNAD27
C-2FORMER CHEVRON FACILITY, NW OF SITEWAD980723795041
-122.42437744
47.24985123
1522408.86
704795.76
WASNAD27
C-3FORMER CHEVRON FACILITY, NW OF SITEWAD980723795042
-122.42451477
47.24940491
1522370.74
704634.26
WASNAD27
C-4FORMER CHEVRON FACILITY, NW OF SITEWAD980723795043
-122.42412567
47.24889755
1522462.22
704446.72
WASNAD27
C-5FORMER CHEVRON FACILITY, NW OF SITEWAD980723795044
-122.42357635
47.24869537
1522596.12
704369.72
WASNAD27
C-6FORMER CHEVRON FACILITY, NW OF SITEWAD980723795045
-122.42299652
47.24847794
1522738.02
704286.50
WASNAD27
D-1FORMER CHEVRON FACILITY, NW OF SITEWAD980723795039
-122.42465210
47.24967575
1162462.53
704679.98
WASNAD83
DOF-19MOff-site, southern bndry, near rr tracksWAD980723795066
0.00000000
0.00000000
0.00
0.00
DOF-20MSouthern bndry, adjacent to rr tracksWAD980723795067
0.00000000
0.00000000
0.00
0.00
HC-1Abandoned, frmrly near southcentral part of siteWAD980723795047
0.00000000
0.00000000
0.00
0.00
HC-2Abandoned, frmrly adjacent to eastern bndryWAD980723795051
0.00000000
0.00000000
0.00
0.00
HC-3Abandoned, frmrly northcentral extent of siteWAD980723795048
0.00000000
0.00000000
0.00
0.00
HC-4Abandoned, frmrly near western bndryWAD980723795049
0.00000000
0.00000000
0.00
0.00
HC-5Abandoned, frmrly adjacent to southern bndryWAD980723795050
0.00000000
0.00000000
0.00
0.00
HC-6Abandoned, frmrly adjacent to eastern bndryWAD980723795052
0.00000000
0.00000000
0.00
0.00
HYGRADE NO2Abandoned, frmrly on adjacent prop, nw of siteWAD980723795046 -122.42201233
47.25001144
1163120.69
704786.34
WASNAD83
MW-01Off-site, near northwest corner of siteWAD980723795033
-122.42606354
47.25027847
1162116.16
704907.56
WASNAD83
MW-02Off-site, near north end of siteWAD980723795034
-122.42234039
47.25116730
1163048.76
705209.35
WASNAD83
MW-03Off-site, east side of siteWAD980723795035
-122.41526031
47.24897003
1164788.07
704365.24
WASNAD83
MW-04Off-site, near southwest cornerWAD980723795036
-122.42297363
47.24437332
1162832.02
702735.44
WASNAD83
MW-05Off-site, south side of siteWAD980723795037
-122.41575623
47.24218750
1164604.68
701895.78
WASNAD83
MW-06Off-site, southeast of siteWAD980723795038
-122.41093445
47.24430847
1165821.09
702639.20
WASNAD83
TTP-2MAdjacent se bndry of siteWAD980723795053
-122.41485596
47.24574280
1164860.01
703186.50
WASNAD83
TTP-2SAdjacent se bndry of siteWAD980723795054
-122.41484833
47.24571609
1164860.34
703176.20
WASNAD83
TTP-2S(R)Replacement well , adjacent se bndry of siteWAD980723795062
0.00000000
0.00000000
0.00
0.00
TTP-3DSouthwest bndry of siteWAD980723795063
0.00000000
0.00000000
0.00
0.00
TTP-3MSouthwest bndry of siteWAD980723795058
-122.41733551
47.24522400
1164239.43
703012.45
WASNAD83
TTP-3SSouthwest bndry of siteWAD980723795059
-122.41729736
47.24522781
1164248.47
703013.20
WASNAD83
TTP-4DAdjacent to western bndry, north half of siteWAD980723795024
-122.42224121
47.24799347
1163046.28
704050.90
WASNAD83
TTP-6M(R)Replacement well, northern bndryWAD980723795064
0.00000000
0.00000000
0.00
0.00
TTP-6SAbandoned, frmrly adjacent northern bndryWAD980723795055
-122.41956329
47.25007248
1163728.63
704793.03
WASNAD83
TTP-6S(R)Replacement well, northern bndryWAD980723795065
0.00000000
0.00000000
0.00
0.00
TTP-12MAdjacent to southwestern bndryWAD980723795056
-122.41947174
47.24600220
1163715.32
703308.20
WASNAD83
TTP-12SAdjacent to southwestern bndryWAD980723795057
-122.41951752
47.24601746
1163703.51
703314.13
WASNAD83
TTP-14DAdjacent to northeastern bndryWAD980723795025
-122.41782379
47.24921036
1164153.26
704468.56
WASNAD83
TTP-16MAbandoned, frmrly near center of siteWAD980723795027
-122.42031860
47.24804306
1163522.39
704058.61
WASNAD83
TTP-16M(R)Near center of site, nw crnr of capped areaWAD980723795060
0.00000000
0.00000000
0.00
0.00
TTP-16SAbandoned, frmrly near center of siteWAD980723795026
-122.42028809
47.24800110
1163530.29
704042.17
WASNAD83
TTP-16S(R)Near center of site, nw crnr of capped areaWAD980723795061
0.00000000
0.00000000
0.00
0.00
TTP-17DN side of capped areaWAD980723795030
-122.41983795
47.24879837
1163648.43
704331.05
WASNAD83
TTP-17MN side of capped areaWAD980723795029
-122.41977692
47.24878693
1163663.52
704326.00
WASNAD83
TTP-17SN side of capped areaWAD980723795028
-122.41973114
47.24880219
1163675.73
704331.42
WASNAD83
TTP-18MAdjacent to eastern bndry, near center of siteWAD980723795032
-122.41677856
47.24831009
1164404.93
704133.43
WASNAD83
TTP-18SAdjacent to eastern bndry, near center of siteWAD980723795031
-122.41676331
47.24829865
1164407.66
704129.48
WASNAD83

Note: Wells were surveyed in State Plane Coordinates at different times using both Horizontal Datum NAD 1927 and NAD 1983. EPA has converted these coordinates to latitude and longitude coordinates (in decimal degrees), using ArcInfo GIS software projection utilites, to facilitate mapping of the locations. The accuracy of these surveyed wells should be plus or minus a foot or so. Note some wells in the table above for which location coordinate information is not available at this time; note other wells for which the locations were digitized off of available paper base maps by EPA staff or contract staff; such wells have latitude/longitude coordinates in the appropriate boxes above but no State Plane coordinates.


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Point of contact: Tamara Langton
E-Mail: langton.tamara@epa.gov
Phone Number: (206) 553-2709
Last Updated: 11/15/2007