Utah Sand and Rock Collecting?

Here is some information from Mark Peterson's Secrets of an affordable reef aquarium the full thing can be found here:

http://utahreefs.com/forum/forum_posts.asp?TID=9244

Utah has two resources that are perfect for setting up marine/reef aquariums. Oolitic sand and Lake Bonneville Tufa Rock (LBTR). See the pics below. But these free resources do not come ready to use. They require first the finding, then the collecting and then cleaning prior to use.

1. Oolitic Sand

If dry, screen with a window screen or something similar to remove sticks, rocks, bullets, etc. Then rinse in tapwater about four times until the rinsewater turns from tan to a clear gray. Rinsing smaller amounts at a time is usually easier because of it's packing density.

2. Utah Aragonite Rock/ Lake Bonneville Tufa Rock (LBTR)

Blast it on all sides at the carwash with the high pressure spray in the Rinse setting. Squeeze the handle. Try to blast off at least 95% of the lichen and moss from all surfaces. Placing the tip of the wand about 3" from the rock surface will get the toughest stuff. Blast all holes. There is dirt in some nice holes that cannot be opened up unless blasted by the high pressure spray. When it's done the clean LBTR is pretty much sterile with very little organic material to cause pollution. Large quantities of clean LBTR cause no problem in any tank, new or old.

Above is how LBTR looks after picking it up off the ground. Below are a couple pics of LBTR in a tank that has been set up for 16 months. But for two exceptions, all the LR seen in these pics is 16 month LBTR. Can you find the exceptions?

The backlight in these pics is the bright morning sun. This tank is directly in the sun of an East facing window.