How do I plot average water levels for nested piezometers on a log?

Hi

I have a borehole with multiple standpipe piezometers installed.  Water level data has been collected over a six month period and recorded in the monitoring group and monitoring data tables (MONG & MOND).

We're reporting detailed monitoring data, but also want to display the average, min and max water levels for each standpipe on the borehole log.

I can grab the average for one Monitoring Point easily enough with a SQL query, but I'm not sure of the best approach to display multiple water level graphics.  Individual discrete graphics would be unaware of each other, and would likely overlap - is there a better log type?

Has anyone approached this problem before?

Thanks

<<Sql(SELECT [MONG].[PointID], [MONG].[ItemKey] _
(SELECT AVG([MOND].[MOND_RDNG]) FROM [MOND] WHERE [MOND].[ItemKey] = [MONG].[ItemKey] AND [MOND].[PointID] = <<CurrSetKey>>) as avg_reading _
FROM [MONG] _
)>>