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表10 トリブチルスズ化合物に関する底質調査結果(平成2年度~8年度指定化学物質等検討調査より)
(単位:ng/g-dry(ppb))
調 査 地 点 |
平成2年度 |
平成3年度 |
平成4年度 |
平成5年度 |
平成6年度 |
平成7年度 |
平成8年度 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
石狩川河口 |
1.1 |
0.9 |
1.4 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
堤川河口 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.5 |
4.5 |
2.7 |
八郎湖 |
nd |
nd |
nd |
1.4 |
1 |
nd |
3.2 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
1 |
nd |
tr(0.3) |
nd |
nd |
nd |
nd |
仙台湾 |
34 |
48 |
22 |
6.8 |
6 |
6.9 |
6.7 |
17 |
21 |
14 |
16 |
16 |
21 |
22 |
25 |
25 |
29 |
25 |
17 |
26 |
21 |
小名浜港 |
29 |
42 |
180 |
94 |
51 |
67 |
17 |
34 |
2.2 |
19 |
76 |
35 |
34 |
20 |
27 |
23 |
18 |
21 |
6 |
10 |
5 |
霞ケ浦 |
- |
- |
- |
3 |
3.4 |
3.4 |
2 |
3 |
2.4 |
2.2 |
2.4 |
3 |
2.4 |
2.1 |
2.1 |
3.5 |
3.3 |
3.4 |
5.2 |
3.6 |
3.1 |
市原・姉崎海岸 |
100 |
81 |
59 |
82 |
45 |
10 |
260 |
44 |
420 |
18 |
8 |
50 |
17 |
16 |
21 |
5 |
28 |
82 |
30 |
18 |
64 |
花見川河口 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7.8 |
5.8 |
6.5 |
16 |
20 |
2.3 |
隅田川河口 |
250 |
160 |
460 |
160 |
130 |
80 |
130 |
150 |
100 |
180 |
130 |
100 |
260 |
180 |
150 |
210 |
170 |
150 |
250 |
170 |
260 |
東京湾中瀬 |
140 |
140 |
160 |
160 |
140 |
140 |
140 |
110 |
130 |
120 |
130 |
120 |
38 |
43 |
100 |
74 |
60 |
57 |
110 |
110 |
120 |
横浜港 |
250 |
380 |
310 |
280 |
300 |
290 |
39 |
46 |
56 |
100 |
180 |
48 |
74 |
120 |
81 |
140 |
150 |
88 |
51 |
91 |
73 |
信濃川河口 |
40 |
3.1 |
7.4 |
9.3 |
3.1 |
4.1 |
30 |
33 |
20 |
23 |
15 |
47 |
19 |
20 |
8.5 |
4.6 |
7.2 |
nd |
7.1 |
13 |
15 |
諏訪湖 |
- |
- |
- |
nd |
nd |
nd |
1.6 |
1.8 |
1.8 |
2.6 |
2.6 |
2.8 |
3.7 |
4.1 |
3.8 |
6.1 |
6.6 |
6.9 |
5.1 |
6.9 |
6.8 |
犀川河口 |
35 |
2.2 |
99 |
27 |
3.2 |
44 |
55 |
11 |
3.6 |
nd |
3.2 |
80 |
30 |
16 |
110 |
29 |
2.6 |
260 |
16 |
29 |
48 |
清水港 |
5.5 |
7 |
35 |
31 |
39 |
32 |
17 |
21 |
24 |
12 |
12 |
10 |
22 |
22 |
25 |
12 |
19 |
20 |
8.9 |
8.3 |
6.7 |
名古屋港 |
97 |
15 |
65 |
98 |
5.9 |
160 |
63 |
65 |
11 |
32 |
33 |
25 |
64 |
69 |
77 |
100 |
94 |
26 |
930 |
230 |
210 |
四日市港 |
140 |
140 |
49 |
160 |
66 |
76 |
42 |
110 |
120 |
38 |
52 |
33 |
77 |
240 |
70 |
30 |
53 |
15 |
19 |
45 |
6.4 |
琵琶湖南湖 |
3.3 |
34 |
4.8 |
2.4 |
- |
11 |
13 |
29 |
26 |
2.2 |
8.2 |
4.6 |
4.7 |
5.2 |
7.5 |
4.7 |
5.2 |
7.5 |
11 |
8.6 |
14 |
宮津港 |
1.1 |
tr(0.7) |
1.1 |
3.4 |
5 |
4.1 |
1.4 |
2.5 |
1.4 |
5.6 |
24 |
7.5 |
1.1 |
5.5 |
4 |
0.9 |
1.5 |
1.8 |
1.5 |
1 |
0.7 |
桂川宮前橋 |
tr(0.6) |
tr(0.5) |
nd |
tr(0.6) |
1.2 |
0.8 |
nd |
nd |
nd |
nd |
nd |
1.5 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
大和川河口 |
9 |
26 |
24 |
39 |
34 |
24 |
17 |
31 |
42 |
14 |
40 |
28 |
12 |
22 |
13 |
2 |
2 |
- |
25 |
15 |
46 |
大阪港 |
880 |
890 |
290 |
270 |
380 |
320 |
120 |
140 |
280 |
290 |
260 |
150 |
200 |
440 |
120 |
500 |
570 |
340 |
220 |
270 |
210 |
姫路沖 |
60 |
35 |
56 |
25 |
13 |
12 |
9 |
35 |
50 |
27 |
14 |
21 |
57 |
39 |
33 |
14 |
4 |
13 |
2 |
1 |
5 |
水島沖 |
42 |
72 |
110 |
27 |
35 |
13 |
4.1 |
7.2 |
8.7 |
17 |
13 |
13 |
6.9 |
5.8 |
5.8 |
13 |
12 |
12 |
14 |
12 |
13 |
呉港 |
240 |
800 |
240 |
280 |
420 |
300 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
広島湾 |
|
|
|
|
|
|
66 |
38 |
33 |
58 |
40 |
50 |
74 |
62 |
62 |
68 |
80 |
90 |
38 |
31 |
41 |
徳山湾 |
2.1 |
3.5 |
2.9 |
4 |
3.1 |
3 |
11 |
15 |
8.5 |
8.2 |
10 |
8.5 |
13 |
7.6 |
8.9 |
9.9 |
8.1 |
12 |
10 |
5.4 |
15 |
吉野川河口 |
|
|
|
4.4 |
5.8 |
8.9 |
8.3 |
10 |
9.9 |
0.8 |
nd |
nd |
5.4 |
tr(0.6) |
2 |
1.1 |
nd |
nd |
0.9 |
1 |
2.9 |
高松港 |
360 |
54 |
38 |
180 |
120 |
71 |
110 |
31 |
29 |
100 |
33 |
22 |
110 |
38 |
42 |
340 |
77 |
72 |
29 |
12 |
18 |
四万十川河口 |
13 |
nd |
nd |
- |
- |
- |
2.1 |
nd |
0.6 |
2.3 |
0.6 |
0.7 |
1.9 |
tr(0.3) |
12 |
12.2 |
tr(0.3) |
1.9 |
0.7 |
6.6 |
6.4 |
洞海湾 |
170 |
85 |
250 |
220 |
140 |
330 |
200 |
250 |
280 |
350 |
380 |
1600 |
200 |
310 |
160 |
240 |
120 |
37 |
170 |
190 |
55 |
博多湾 |
18 |
18 |
16 |
27 |
21 |
16 |
29 |
15 |
16 |
10 |
8.7 |
12 |
8.2 |
10 |
13 |
10 |
8.4 |
14 |
6.3 |
6.4 |
7 |
大牟田沖 |
40 |
38 |
9 |
61 |
40 |
37 |
20 |
12 |
14 |
8 |
8 |
11 |
22 |
8 |
12 |
530 |
90 |
110 |
16 |
16 |
12 |
伊万里湾 |
|
|
|
|
|
|
190 |
220 |
90 |
120 |
120 |
88 |
160 |
97 |
120 |
73 |
78 |
95 |
127 |
157 |
238 |
長崎港 |
130 |
120 |
110 |
53 |
64 |
62 |
41 |
32 |
46 |
25 |
27 |
21 |
31 |
35 |
16 |
59 |
35 |
83 |
57 |
23 |
34 |
大淀川河口 |
1.3 |
0.9 |
1.5 |
2.7 |
1.5 |
7.7 |
nd |
nd |
4.6 |
nd |
nd |
nd |
tr(0.7) |
1.2 |
tr(0.7) |
2.1 |
nd |
1.6 |
0.7 |
nd |
nd |
五反田川五反田橋 |
nd |
1.6 |
nd |
1.2 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
統一検出限界値 |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
0.6 |
検 出 頻 度 |
79/90 |
85/95 |
88/102 |
85/102 |
87/102 |
87/104 |
94/108 |
最 大 値 |
890 |
420 |
420 |
1600 |
440 |
570 |
930 |
最 小 値 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
幾 何 平 均 |
23 |
17 |
15 |
12 |
14 |
13 |
11 |
注1 : TBTO換算値
注2 : ndは不検出,”-”は欠測,空欄部分では調査を行っていない。
注3 : 3幾何平均値は,ndを,各地点ごとの検出限界値の 1/2として算出した。