PG&E rate

I have looked up the PG&E rate for Schedule E-1 on the PG&E website and it lists Tier 1 as $0.13627/kWh. Loading the PG&E E-1 rate into SAM, it shows the Tier 1 rate as $0.1323/kWh. The rates in the other tiers also differ. Can you explain this apparent discrepancy? Is this a concern for other rate schedules? Thanks very much.

Dear Tom,
When you use SAM's download rate structure feature, it is up to you to ensure that the data is correct for your analysis.
SAM communicates with the OpenEI Utility Rate Database (URDB) to download the data. There are a couple of possible explanations for the discrepancy. One is that you are looking at a different version of the rate sheet than the one in the URDB. Another is that the rate structure in the URDB is out of date.
You can check that by comparing your rate sheet to the one available on the URDB website. To do that, from the Utility Rate page in SAM, click Search for Rates to open the OpenEI Utility Rate Database window, and with your rate highlighted in the Available Rate Schedules list, click the "Go to Rate Page on OpenEI" link near the bottom of the window. That takes you to the rate schedule's page on the URDB website where you can download a copy of the original rate sheet that was used to populate the database.
For the PG&E E-1 rate structure, it looks like there are different versions for different "baseline regions," so be sure you are downloading the right version. 
One other thing to be aware of is that there is usually more detail in the rate sheet than the inputs on the SAM Utility Rate page (equivalent to variables in the URDB). For example, the rate sheet may have a list of monthly fees and charges that are represented in the URDB as a single fixed charge that is the sum of the values on the rate sheet.
Finally, if you do notice an error in the URDB data, please let the URDB team know. You can contact them via the URDB community . The URDB is a separate project at NREL from SAM.
Best regards,

Paul.