fix shrinkage crack for concrete wall

Hi

1-10 inch concrete wall with #4 @ 32 inch o.c. vert for shrinkage and one layer of #4 @24 inch o.c. horiz

 it retaining steel on tension side is ok but min. start with

 #5 @ 8 inch o.c. 2 ft from footing

#5 @ 16 inch o.c. 4 ft  from footing

and #4 @ 16 inch o. c. 4 ft to 10 ft

almost 8 years old

the wall developed hair line crack vertical

only one crack is shifted the face not flush(very small) 

I would assume is shrinkage crack

 

that Orange County ,CA

if you think there anther reason or analysis

if any one knows some company fix that kind of crack

 

and prevent future cracks

 

thanks for let me know

 

you can e-mail privet for the name of company

 

Thanks in advance

 

Dave A.