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Monitor well 7B was installed using 8 inch hollow stem augers to drill into the second water zone (B Zone) To verify that no underground utilities would be compromised by the drilling, the first 5 feet were hand augered Once the five foot depth was reached, 8 inch hollow stem augers were used to drill the boring to the 20 foot depth From the 20 foot depth to top of B Zone sand, the boring was continuously sampled in two foot intervals to determine the exact depth the sandy interval was encountered (top of water) Once the top of sand was determined the boring was drilled to the 24 foot depth with the 8 inch hollow stem augers and then continuously sampled in two foot intervals to determine the depth to the top of clay (B aquitard) Once the top of clay was encountered the boring was drilled to that depth with the 8 inch hollow stem augers F480 2 inch diameter Sch 40 PVC 0 02 inch slotted screen with a 4 inch length bottom cap was placed across from the B Zone sand (20 5 to 28 feet bts) through the augers and 2 inch diameter sch 40 PVC threaded pipe was attached to the screen and brought to surface 93 sand was then slowly placed between the 2 inch PVC pipe and the augers to 19 5 feet bts as the augers were staged out of the hole Bentonite pellets were then placed on top of the sand (18 to 19 5 feet bts) and hydrated with clean city of Stockton tap water An 8 inch diameter traffic rated traffic box was then set in a 24 inch diameter concrete pad in the asphalt street surface approximately 1/4 inch above asphalt grade with the finished concrete making a smooth transition between the top of the traffic box and the asphalt surface CL US TER WELL RIA B Recovery well RIA was installed using 10 inch hollow stem augers to drill into the first water zone (A Zone) To verify that no underground utilities would be compromised by the drilling, the first 5 feet were hand augered Once the five foot depth was reached, 10 inch hollow stem augers were used to drill the boring to the 10 foot depth From the 10 foot depth to top of A Zone sand, the boring was continuously sampled in two foot intervals to determine the exact depth the sandy interval was encountered (top of water) Once the top of sand was determined the boring was drilled to the 16 foot depth with the 10 inch hollow stem augers and then continuously sampled in two foot intervals to determine the depth to the top of clay (A/B aquitard) Once the top of clay was encountered the boring was drilled to that depth with the 10 inch hollow stem augets F480 4 inch diameter Sch 40 PVC 0 01 inch slotted screen with a 4 inch length bottom cap was placed across from the A Zone sand (12 to 17 feet bts) through the augers and 4 inch diameter sch 40 PVC threaded pipe was attached to the screen and brought to surface #2/12 sand was then slowly placed between the 4 inch PVC pipe and the augers to 11 feet bts as the augers were staged out of the hole Bentonite pellets were then placed on top of the sand (9 to l 1 feet bts) and hydrated with clean city of Stockton tap water An 8 inch diameter traffic rated traffic box was then set in a 24 inch diameter concrete pad in the asphalt street surface approximately 1/4 inch above asphalt grade with the finished concrete making a smooth transition between the top of the traffic box and the asphalt surface 9 Sanchez 2nd QM 2001