The document consists of an array of data points indicating levels and heights, ranging from level 1 at 0' to level 15 at 142' - 7 1/2". There are various notations such as 'dn', 'up', and letters that might represent different classifications or codes. Overall, it appears to convey vertical measurements in a structured format.

2. DN
DN
DN
DN
DN
DN
DN
DN
DN
DN
UP
UP
DN
UP
-
-
-
-
-
-
C C
D D
E E
F F
G G
H H
J J
K K
L L
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
-
-

4. Level 1
0' - 0"
Level 2
10' - 0"
Level 3
22' - 0"
Level 4
34' - 6"
Level 5
44' - 7"
Level 6
53' - 10"
Level 7
63' - 1"
Level 8
72' - 4"
Level 9
81' - 7"
Level 10
91' - 5 1/2"
Level 11
102' - 7 1/2"
Level 12
112' - 7 1/2"
Level 13
122' - 7 1/2"
Level 14
132' - 7 1/2"
Level 15
142' - 7 1/2"
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