USGS identifier
USGS2
NP= Neutralization Potential
NP values determined by wet chemical methods.
NP= equivalent CaCO3/1000 tons of material
MPA= Maximum Potential Acidity
MPA= percent Sulfur x 31.25
NNP= Net Neutralization Potential
NNP= NP - MPA
Depth (ft) NP MPA NNP
31 1.5 0.1 1.4
32 2.0 0.0 2.0
33 1.8 0.0 1.8
34 1.8 0.0 1.8
35 3.1 0.0 3.1
36 3.8 0.8 3.0
37 11.8 0.5 11.3
38 10.6 0.0 10.6
39 8.9 0.1 8.8
40 11.0 0.1 10.9
41 8.6 0.1 8.5
42 5.1 0.8 4.3
43 7.2 0.4 6.8
44 7.4 0.8 6.6
45 16.4 0.0 16.4
46 41.0 0.0 41.0
47 31.5 0.0 31.5
48 18.2 0.0 18.2
49 12.5 0.0 12.5
50 12.0 0.0 12.0
51 10.5 0.0 10.5
52 11.5 0.0 11.5
53 9.2 5.1 4.1
54 13.6 2.2 11.4
55 11.0 0.1 10.9
56 6.5 1.4 5.1
57 7.6 2.8 4.8
58 4.9 1.1 3.8
59 13.1 0.0 13.1
60 19.6 0.0 19.6
61 14.4 0.1 14.3
62 20.4 0.0 20.4
63 7.2 0.0 7.2
64 14.2 0.1 14.1
65 6.9 3.1 3.8
66 4.8 1.5 3.3
67 4.2 3.4 0.8
68 4.8 8.7 -3.9
69 5.6 2.8 2.8
70 3.5 3.0 0.5
71 3.5 1.7 1.8
72 7.1 2.7 4.4
73 3.1 2.0 1.1
74 6.6 5.0 1.6
75 9.6 2.1 7.5
76 15.0 1.2 13.8
77 9.6 0.9 8.7
78 3.5 3.7 -0.2
79 6.8 3.1 3.7
80 7.6 1.4 6.2
81 7.2 0.1 7.1
82 6.0 1.5 4.5
83 12.2 0.9 11.3
84 22.8 0.0 22.8
85 6.9 2.3 4.6
86 5.1 1.3 3.8
87 4.1 1.0 3.1
88 10.8 0.1 10.7
89 12.1 0.0 12.1
90 3.6 1.5 2.1
91 6.8 2.7 4.1
92 5.8 3.3 2.5
93 10.6 0.8 9.8
94 6.2 0.6 5.6
95 10.4 0.1 10.3
96 16.5 4.3 12.3
97 14.8 1.7 13.1
98 12.0 15.6 -3.6
99 4.2 3.5 0.7
100 7.0 2.9 4.1
101 4.0 2.0 2.0
102 4.6 4.0 0.6
103 4.8 4.9 -0.1
104 8.6 10.7 -2.1
105 6.9 9.9 -3.0
106 8.6 18.1 -9.5
107 7.1 23.8 -16.7
108 9.0 42.0 -33.0
109 2.4 48.3 -45.9
110 0.2 83.1 -82.9
111 5.5 10.5 -5.0
112 8.2 21.3 -13.1
113 3.2 2.1 1.1
114 1.6 0.8 0.8
115 -0.1 19.5 -19.6
116 -0.1 6.3 -6.4
117 N.D. N.D. N.D.
118 N.D. N.D. N.D.
119 N.D. N.D. N.D.
120 -5.5 91.1 -96.6
121 -4.5 75.9 -80.4
122 -3.5 96.3 -99.8
123 -3.8 128.4 -132.2
124 -2.9 92.3 -95.2
125 0.5 11.6 -11.1
126 1.8 7.8 -6.0
127 2.0 37.2 -35.2
128 2.6 9.3 -6.7
129 2.2 10.0 -7.8
130 0.8 14.0 -13.2
131 2.0 2.1 -0.1
132 10.4 2.3 8.1
133 10.1 4.7 5.4
134 9.0 3.2 5.8
135 10.5 8.7 1.8
136 7.2 6.3 1.0
137 1.2 2.4 -1.2
138 1.0 1.8 -0.8
139 3.1 1.1 2.0
140 7.8 0.0 7.8
141 2.9 0.0 2.9
142 2.9 0.6 2.3
143 6.6 0.4 6.2
144 2.9 0.6 2.3
145 1.5 0.6 0.9
146 7.9 1.1 6.8
147 4.6 6.0 -1.4
148 5.8 1.3 4.5
149 6.8 1.5 5.3
150 8.6 4.9 3.7
151 2.6 9.2 -6.6
152 2.0 5.7 -3.7
153 3.4 2.1 1.3
154 5.9 1.3 4.6
155 4.8 2.1 2.7
156 8.1 9.5 -1.4
157 6.0 5.6 0.4
158 6.1 3.2 2.9
159 8.8 3.5 5.3
160 6.2 1.6 4.6
161 7.6 3.2 4.4
162 7.9 6.4 1.5
163 11.2 8.9 2.3
164 8.0 2.8 5.2
165 7.4 0.8 6.6
166 5.5 1.1 4.4
167 5.9 1.4 4.5
168 -1.6 16.6 -18.2
169 -5.0 90.2 -95.2
170 -6.6 98.0 -104.6
171 -3.1 49.2 -52.3
172 -4.1 28.8 -32.9
173 9.1 9.6 -0.5
174 0.4 6.4 -6.0
175 0.9 3.3 -2.4
176 1.5 3.2 -1.7
177 -0.8 1.0 -1.8
178 9.8 26.4 -16.6
179 0.4 2.5 -2.1
180 0.9 1.6 -0.7
181 1.9 0.6 1.3
182 7.4 1.7 5.7
183 7.4 2.8 4.6
184 3.1 4.7 -1.6
185 2.4 4.6 -2.2
186 2.4 0.5 1.9
187 6.6 2.4 4.2
188 7.2 1.5 5.7
189 6.5 7.4 -0.9
190 4.5 6.1 -1.6
191 8.9 3.0 5.9
192 4.5 1.9 2.6
193 10.9 8.9 2.0
194 0.4 2.6 -2.2
195 0.2 2.7 -2.5
196 0.4 2.1 -1.7
197 0.4 0.0 0.4
198 0.5 0.0 0.5
199 0.6 0.0 0.6
200 1.1 0.0 1.1
201 0.9 2.9 -2.0
202 0.2 7.7 -7.5
203 1.1 30.3 -29.2
204 0.0 7.4 -7.4
205 -7.4 129.4 -136.8
206 -3.2 91.4 -94.6
207 N.D. N.D. N.D.
208 N.D. N.D. N.D.
209 N.D. N.D. N.D.
210 N.D. N.D. N.D.
211 0.0 14.2 -14.2
212 0.0 6.5 -6.5
213 0.9 3.8 -2.9
214 -0.8 4.3 -5.1
215 0.4 1.9 -1.5
216 0.2 5.3 -5.1
217 0.0 3.6 -3.6
218 1.2 7.9 -6.7
219 4.5 4.4 0.1
220 5.5 1.6 3.9
221 7.4 0.7 6.7
222 -5.0 1.5 -6.5
223 0.0 0.4 -0.4
224 0.4 0.2 0.2
225 0.6 0.7 -0.1
226 1.1 1.8 -0.7
227 1.3 2.9 -1.6
228 0.5 7.1 -6.6
229 0.4 15.4 -15.0
230 0.1 5.2 -5.1
231 -1.0 1.0 -2.0
232 0.6 2.1 -1.5
233 4.8 4.2 0.6
234 3.5 0.1 3.4
235 3.9 0.8 3.1
236 4.8 1.6 3.2
237 1.5 0.8 0.7
238 4.1 1.3 2.8
239 6.6 0.9 5.7
240 6.3 0.0 6.3
241 2.2 9.4 -7.2
242 2.2 6.2 -4.0
243 6.1 3.1 3.0
244 4.4 4.3 0.1
245 4.1 2.3 1.8
246 0.1 6.0 -5.9
247 -0.2 8.2 -8.4
248 -1.0 25.9 -26.9
249 N.D. N.D. N.D.
250 N.D. N.D. N.D.
251 N.D. N.D. N.D.
252 N.D. N.D. N.D.
253 N.D. N.D. N.D.
254 N.D. N.D. N.D.
255 N.D. N.D. N.D.
256 N.D. N.D. N.D.
257 N.D. N.D. N.D.
258 N.D. N.D. N.D.
259 N.D. N.D. N.D.
260 N.D. N.D. N.D.
261 -6.2 76.3 -82.5
262 -5.6 52.3 -57.9
263 -2.1 21.3 -23.4
264 -1.6 22.8 -24.4
265 -0.6 15.4 -16.0
266 -0.1 7.3 -7.4
267 0.0 6.6 -6.6
268 2.8 17.2 -14.4
269 6.4 5.9 0.5
270 3.4 2.4 1.0
271 6.1 3.3 2.8
272 2.9 1.2 1.7
273 0.9 1.2 -0.3
274 4.0 0.4 3.6
275 2.1 1.8 0.3
276 5.8 5.8 0.0
277 2.1 0.7 1.4
278 6.6 0.1 6.5
279 3.0 1.3 1.8
280 -0.2 3.9 -4.1
281 -1.8 37.2 -39.0
282 N.D. N.D. N.D.
283 0.0 22.2 -22.2
284 -1.0 65.3 -66.3
285 -2.2 70.0 -72.2
286 -1.9 9.6 -11.5
287 -1.9 8.4 -10.3
288 -0.6 3.5 -4.1
289 -0.1 0.6 -0.7
290 0.1 0.7 -0.6
291 -0.1 2.4 -2.5
292 -0.2 2.0 -2.2
293 -0.1 1.6 -1.7
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