38
-RC Environrnental Managemenl. Inc. 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105 SFUND RECORDS CTR 88015054 022200492 March 20. 199> AR0724 .Mr. William R. Victor Errol L. \4ontgomery &. Associates, Inc. 1075 East Fort Lowell Road. Suite B Tucson, Arizona 85719 Contract No. 68-\V9-0009 Work Assignment No. C09035 Re: Transmittal of Requested Information Dear Mr. V^ictor: PRC Environmental Management, Inc. (PRC) is in receipt of your February 25, 1991 letter to Mr. Thomas Dunkelman requesting information concerning the SUTRA simulations performed to support the draft Baseline Risk Assessment for the Hazardous Waste Area, Hassayampa Landfill, Maricopa County, .Arizona. Mr. Dunkelman has directed PRC to provide response to the six items listed in your letter ?s follo^'^s: Item 1: The spatial coordinates of node locations in the finite element grid are provided as Attachment 1 to this letter. The coordinates are identical to those submitted to you previously on DOS format diskette. Should vou also require element incidence information, please refer to DATASET 22 of the diskette file HASS55.DAT. Fluid source term node locations are identified in DATASET 17 of the file. The following nodes are identified as fluid source locations: 25, 26, 27. 53, 54, 55, 81. 82. 83, 137, 138. 139. 165. 166, 167, 193, 194, nnd 195 Item 2: Fluid source terms were variably active from .Mav 1979 tlirough November 1980. Item 3a: Specified concentration values (DATASET 20) were not used to support the simulations. Item 3b: Nodal locations of fluid sources are identified above and in .Attachment 1. Fluid source rates (DATASET 17) at each fluid source nodal location are identified in Attachment 2 to this letter. Solute concentrations for DAT.ASET 17 were calculated for each contaminant of concern based upon the mass of one-third of the disposal volume reported in Appendix B of the Risk Assessment. A summary table of these values has not yet been prepared. f « contains recycled tiber and is recyclable

Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

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Page 1: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

-RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

SFUND RECORDS CTR

88015054 022200492

March 20. 199> AR0724

.Mr. William R. Victor Errol L. \4ontgomery &. Associates, Inc. 1075 East Fort Lowell Road. Suite B Tucson, Arizona 85719

Contract No. 68-\V9-0009 Work Assignment No. C09035

Re: Transmittal of Requested Information

Dear Mr. V ictor:

PRC Environmental Management, Inc. (PRC) is in receipt of your February 25, 1991 letter to Mr. Thomas Dunkelman requesting information concerning the SUTRA simulations performed to support the draft Baseline Risk Assessment for the Hazardous Waste Area, Hassayampa Landfill, Maricopa County, .Arizona. Mr. Dunkelman has directed PRC to provide response to the six items listed in your letter ?s follo ' s:

Item 1: The spatial coordinates of node locations in the finite element grid are provided as Attachment 1 to this letter. The coordinates are identical to those submitted to you previously on DOS format diskette. Should vou also require element incidence information, please refer to DATASET 22 of the diskette file H A S S 5 5 . D A T .

Fluid source term node locations are identified in DATASET 17 of the file. The following nodes are identified as fluid source locations: 25, 26, 27. 53, 54, 55, 81. 82. 83, 137, 138. 139. 165. 166, 167, 193, 194, nnd 195

Item 2: Fluid source terms were variably active from .Mav 1979 tlirough November 1980.

Item 3a: Specified concentration values (DATASET 20) were not used to support the simulations.

Item 3b: Nodal locations of fluid sources are identified above and in .Attachment 1. Fluid source rates (DATASET 17) at each fluid source nodal location are identified in Attachment 2 to this letter.

Solute concentrations for DAT.ASET 17 were calculated for each contaminant of concern based upon the mass of one-third of the disposal volume reported in Appendix B of the Risk Assessment. A summary table of these values has not yet been prepared.

f « contains recycled tiber and is recyclable

Page 2: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Item 4: The analytical model proposed in reference [1] was used to describe (1) soil water content as a function of pressure head and (2) hydraulic conductivity as a function of dimensionless water content.

Following a review of references [2] and [3] the following parameters were identified: a = 0.12 cm"'; 9, = 0.40; 9. = 0.055; N = 2.2.

Item 5: The adsorption parameters for DATASET 11 are those listed in Table 3-7. DATASET 12 was not used.

Item 6: Hydrostatic pressure was initially set for each node location. .All initial concentrations were zero. The pressure head contour maps requested on March 14, 1991 have not yet been prepared.

Information not included with this letter will be provided as available. Should you have questions or comments concerning additional information, please do not hesitate to contact me at 415\543-4880.

Sincerely,

'\\ ^ ' Randolf A. Fish Project Manager

.Attachments: (2)

cc: Thomas J. Dunkelman, U.S. EPA

;nces: [I] •.an Genuchten, .M. Th. :9S0. .A clGsed-form equation for predicting the hvdraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44:892-898.

[2] Carsel, R.F. and Parrish, R.S. 1988. Developing joint probability distributions of soil water retention characteristics. Water Resour. Res. 24:755-769.

[3] .Arya, L.M. and Paris, J.F. 1981. .A physicoempirical model to predict the soil moisture characteristic from particle-size distribution and bulk density data. Soil Sci. Soc. Am. J. 45:1023-1030.

Page 3: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Attachment 1

Page 4: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

SUTRA Node Locations Hassayampa Landfill

Node Number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

X Coorduiare

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+00

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+00

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+(X)

O.OOOOE+OO

O.OOOOE+00

O.OOOOE+OO

O.OOOOE+00

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+00

O.OOOOE+00

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+00

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+OO

O.OOOOE+OO

-—~ Y Coordinate

O.OOOOE+OO

5.OOOOE+OO

9.OOOOE+OO

1.3000E+01

1.7000E+01

2.1000E+01

2.5000E+01

2.9000E+01

3.3000E+01

3.7000E+01

4.1000E+0I

4.5000E+01

4.9000E+01

5.1500E+0I

5.4500E+01

5.7000E+0I

6.0000E+0I

6.2000E+01

6.3500E+01

6.5000E+01

6.7500E+01

7.0000E+01

7.2000E+01

7.4000E+OI

7.6OO0E+0I

7.8000E+01

8.0000E+01

8.2000E+01

Page 5: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

.Node Number

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

' '

X Coordinate

S.1500E+0()

8.1500E+(X)

8.1500E+00

8.1500E+00

8.1500E+00

8.1500E+00

8.1500E+00

8.I500E+00

S.1500E+00

8.I500E+00

8.1500E+00

8.1500E+00

8.1500E+00

8.1500E+00

8.1500E+00

8.I500E+00

8.15OOE+O0

8.1500E+00

8.1500E+00

8.1500E+00

•?.!500E+(X)

8.1500E+00

8.1500E+00

8.I500E+00

8.1500E+00

8.1500E+00

8.1500E+00

8.1500E+00

1.6300E+0I

; : 1 Y Coordinate

O.OOOOE+OO

5.OOOOE+OO

9.OOOOE+OO

1.3000E+01

1.7000E+01

2.1000E+01

2.5000E+01

2.9000E+01

3.3000E+01

3.7000E+OI

4.1000E+01

4.5000E+01

4.9000E+01

5.1500E+01

5.4500E+01

5.7000E+0I

6.0000E+01

6.2000E+01

6.3500E+01

6.5000E+01

O.7500E+U1

7.0000E+0I

7.2000E+01

7.4O00E+01

7.6000E+0I

7.8000E+01

8.0000E+01

8.2000E+01

O.OOOOE+OO

Page 6: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

7S

79

80

81

82

83

84

85

86

X Coordinate

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+0I

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+0i

I.6300E+01

1.6300E+01

I.6300E+0I

1.6300E+01

1.6300E+0I

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

1.6300E+01

I.6300E+01

1.6300E+01

2.4450E+0I

2.4450E+01

Y Coordinate

5.OOOOE+OO

9.0000E+00

1.3000E+01

1.7000E+01

2.1000E+01

2.5000E+01

2.9000E+01

3.3000E+OI

3.7000E+0I

4.1000E+01

4.5000E+01

4.9000E+01

5.1500E+01

5.4500E+01

5.7000E+01

6.0000E+01

6.2000E+01

6.3500E+01

6.5000E+01

6.7500E+01

7.0000E+01

7.2000E+01

7.4000E+01

7.6000E+01

7.8000E+01

8.0000E+01

8.2000E+0I

O.OOOOE+OO

5.OOOOE+OO

Page 7: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

!07

108

109

110

111

112

113

114

115

.X Coordinate

2.4450E+0I

2.4450E+01

2.4450E+0i

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+0I

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E+0I

2.4450E+01

2.4450E+01

2.4450E+01

2.4450E-^01

2.4450E+01

2.4450E+01

2.4450E+0I

2.4450E+01

2.4450E+01

3.26OOE+01

3.2600E+01

3.2600E+0I

Y Coordinate

9.0000E+00

I.3000E+01

1.7000E+01

2.1000E+01

2.5000E+01

2.9000E+01

3.3000E+01

3.7000E+01

4.1000E+01

4.5000E+01

4.9000E+01

5.1500E+01

5.4500E+01

5.7000E+01

6.00O0E+01

6.2000E+01

6.3500E+0I

6.5000E+01

6.7500E+01

7.0000E+01

•7.2(XX)E+0!

7.4000E+01

7.6000E+01

7.8OOOE+01

8.0000E+01

8.2000E+01

O.OOOOE+OO

5.OOOOE+OO

9. OOOOE+OO

Page 8: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133 _

134

135

136

137

138

139

140

141

142

143

144

X Coordinate

3.2600E+0I

3.2600E+01

3.2600E+01

3.2600E+01

3.2600E+01

3.26OOE+0I

3.2600E+01

3.2600E+01

3.26OOE+0I

3.2600E+01

3.2600E+01

3.2600E+01

3.2600E+01

3.2600E+0I

3.26OOE+0I

3.26OOE+01

3.2600E+01

3.2600E+01

3.26OOE+0I

3.2600E+01

3.26iX)E-i-0i

3.2600E+01

3.26OOE+01

3.2600E+0I

3.2600E+01

4.8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

Y Coordinate

1.3000E+01

I.7000E+01

2.1000E+0I

2.5O00E+01

2.9000E+01

3.3000E+01

3.7000E+01

4.IOOOE+01

4.5000E+OI

4.9000E+01

5.1500E+01

5.4500E+01

5.7000E+01

6.0000E+01

6.2000E+01

6.3500E+01

6.5000E+0I

6.7500E+0I

7.0000E+01

7.2000E+01

7.4OO0Ei-01

7.6OO0E+01

7.8000E+01

8.0000E+OI

8.20O0E+01

O.OOOOE+00

5.0000E+00

9.0000E+00

1.3000E+01

Page 9: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

.X Coordinate

4.8900E+01

4.8900E+0I

4.8900E+0I

4.8900E+01

4.8900E+0I

4.8900E+0I

4.8900E+01

4 8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

4.89O0E+0I

4.8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

4.8900E+01

J soOOE-^01

4.8900E+01

4.8900E+01

4.8900E+01

6.5200E+01

6.5200E+0I

6.5200E+0I

6.5200E+01

6 5200E+01

Y Coordinate

1.7000E+01

2.1000E+01

2.5000E+01

2.9000E+01

3.3000E+01

3.7000E+01

4.1000E+01

4.5000E+01

4.9000E+01

5.1500E+01

5.4500E+01

5.7000E+01

6.0000E+01

6.2000E+01

6.35OOE+01

6.5000E+01

6.7500E+01

7.0000E+01

7.2000E+01

7.4000E+01

7 I5000E+0!

7.8000E+01

8.0000E+01

8.2000E+0I

O.OOOOE+OO

5.OOOOE+OO

9.OOOOE+OO

I.3000E+0I

1.7000E+01

Page 10: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

104

195

196

197

198

199

200

201

202

X Coordinate

6.5200E+01

6.5200E+01

6.52(X)E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.5200E+01

6.52OOE+0I

6.5200E+01

6.520OE+01

6.5200E+01

6.5200E+01

6.5200E-^01

6.5200E+01

6.5200E+01

8.1500E+0I

8.1500E+0I

8.1500E+0I

8.1500E+01

8.I500E+01

S.I500E+01

Y Coordinate

2.1000E+01

2.5000E+0I

2.90O0E+0i

3.3000E+01

3.7000E+01

4.1000E+01

4.5000E+01

4.9000E+01

5.150OE+01

5.4500E+01

5.7000E+01

6.0000E+01

6.2000E+01

6.3500E+01

6.50O0E+0I

6.7500E+0I

7.0000E+OI

7,2000E+01

7.4OO0E+01

7.6000E+01

''.8(X)0E+01

8.0000E+0I

8.2000E+01

O.OOOOE+OO

5.OOOOE+OO

9.0000E+00

I.3000E+0I

1.7000E+01

2.I0O0E+01

Page 11: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

X Coordinate

8.I500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.I500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+01

8.1500E+OI

8.1500E+01

8.I500E+01

S.1500E+01

8.1500E+01

8.1500E+01

8.1500E+O1

8.1500E+01

1.0150E+02

1.015OE+O2

1.0150E+02

1.0150E+02

1.0150E+02

1.0150E+02

1.0150E+02

Y Coordinate

2.5000E+0I

2.9000E+01

3.3000E+01

3.7000E+01

4.1000E+01

4.5000E+01

4.9000E+01

5.1500E+01

5.4500E+0I

5.7000E+01

6.0000E+01

6.2000E+01

6.3500E+01

6.5000F.+01

6.7500E+01

7.0000E+01

7.2000E+01

7.4000E+01

7.6000E+01

7.80OOE+01

8.0000E+01

8.20OOE+01

O.OOOOE+00

5.OOOOE+OO

9.0000E+00

1.3000E+OI .

I.7000E+01

2.1000E+0I

2.5000E+0I

Page 12: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

Node Number

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

.X Coordinate

1.0I50E+02

1.015OE+O2

1.0150E+02

1.0I50E+02

1.0150E+02

I.0150E+02

1.0150E+02

1.015OE+O2

1.01.50E+02

1.0150E+02

I.0150E+02

1.0150E+02

1.0150E+02

1.0150E+02

1.0150E+02

1.0150E+02

1.0150E+02

1.0I50E+02

1.015OE+O2

1.0150E+02

i.O!50E-^02

1.2150E+02

1.2150E+02

1.2150E+02

1.2150E+02

I.2I50E+02

1.2150E+02

1.2150E+02

1.2150E+02

Y Coordinate

2.9000E+01

3.3000E+01

3.7000E+01

4.1000E+01

4.5000E+01

4.9000E+01

5.1500E+01

5.4500E+01

5.7000E+01

6.0000E+01

6.2000E+01

6.3500E+01

6.5000E+01

6.7500E+01

7.0000E+01

7.2000E+01

7.4000E+01

7.6000E+01

7.8000E+01

8.0000E+01

8.2000E+01

O.OOOOE+OO

5.OOOOE+OO

9.OOOOE+OO

I.3000E+01

I.7000E+01

2.1000E+01

2.5000E+0I

2.9000E+01

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Node Number

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

X Coordinate

1.2150E+02

1.2150E+02

1.2150E+02

1.2150E+02

1.2150E+02

I.2I50E+02

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33

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.Attachment 2

Page 38: Ltr: Response to 2/25/91 ltr re SUTRA simulations to support draft … · 2021. 2. 15. · -RC Environrnental Managemenl. Inc. • 2C Ho-.varc Siree! 5ui!e 700 San Francisco. CA 94105

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Nodes 165, 166, 167. 193, 194, and 195

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