i will ask bret ferrari, to speak to his site conditions and content and construction, and a copy of his report is provided in the packet as exhibit h. >> thank you. bret fer rar ree, structural engineering, i have been practicing here for 30 years i have had experience with conditions, xktly like this in san francisco, neighbor disputes with retaining walls, that are over 120 years,. the l shaped walls, were built for the benefit of the devisidaro place. to flatten the lot, it runs downhill north to south, in order to flatten the lot, the hillside had to be cut into. the hillside properties on washington, were constructed on top of the brick retaining walls, so the walls had to exist before the buildings, were constructed. i had a similar case between properties between pine and bush street where there was a brick wall that sur vised the 06 earthquake, it was solely on the uphill property it was typical at that time to build a retaining wall on the inside space, to maximize the square footage, court here in san francisco, the judge ruled that the maintenance and ownership of that wal