A succession of chemical and fertilizer factories were built on Stockton Harbor's Kidder Point from the early 20th century to the 1970s. The waste products from at least two onsite processes: sulfuric acid and aluminum sulfate manufacturing, were dumped along the Stockton Harbor shore.
Earlier pH testing of site: 1984 * 1990
09/14/16 Sample Collection Results . Numbers refer to locations on Map 1.
1. Aluminum, 10,600 mg/kg. Sulfur: 25,400 mg/kg. pH 5.40
2. Aluminum: 3,545 mg/kg.
Sulfur: 289,7000 mg/kg. pH 3.50.
3.Aluminum: 3,023 mg/kg.
Sulfur 50,400 mg/kg. pH: 3.12.
4. Aluminum: 1,927 mg/kg.
Sulfur: 235,500 mg/kg. pH: 3.40
5. Aluminum: 2,980 mg/kg. Sulfur:150,500 g/kg. pH: 3.20.
6. Aluminum: 2,805 mg/kg. Sulfur 163,800 mg/kg. pH: 5.08
7. Aluminum: 9,506 mg/kg. Sulfur 11,500 mg/kg. pH: 6.65
8. Aluminum: 11,400 mg/kg. Sulfur 17,500 mg/kg. pH: 6.31
Earlier pH testing of site: 1984 * 1990
09/14/16 Sample Collection Results . Numbers refer to locations on Map 1.
1. Aluminum, 10,600 mg/kg. Sulfur: 25,400 mg/kg. pH 5.40
2. Aluminum: 3,545 mg/kg.
Sulfur: 289,7000 mg/kg. pH 3.50.
3.Aluminum: 3,023 mg/kg.
Sulfur 50,400 mg/kg. pH: 3.12.
4. Aluminum: 1,927 mg/kg.
Sulfur: 235,500 mg/kg. pH: 3.40
5. Aluminum: 2,980 mg/kg. Sulfur:150,500 g/kg. pH: 3.20.
6. Aluminum: 2,805 mg/kg. Sulfur 163,800 mg/kg. pH: 5.08
7. Aluminum: 9,506 mg/kg. Sulfur 11,500 mg/kg. pH: 6.65
8. Aluminum: 11,400 mg/kg. Sulfur 17,500 mg/kg. pH: 6.31
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