Water tests for ponds usually have more info but you have the critical ones there. If that came from the Co-op ext. then I would add the lime. In a couple mths (when the water is warm enough) it will have worked enough for your alka to be up to 20ppm.

Did you have the pond soil tested? The soil tests have more info than the water tests.

Look at this thread for actual test reports (soil and water).

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=17;t=000092#000002