PLATE 8 



Fig. 1. Concrete cylinders, Pier 28, San Francisco. Disinte- 

 gration of concrete due to poor workmanship and improper tamp- 

 ing. These cylinders were repaired by encasing in dense concrete. 



Fig. 2. Reinforced concrete piles, Pier 35, San Francisco. 6 

 years exposure, excellent condition. 



