one of the issues that has -- seems to be in question here is the actual personaliation grouting procedure. that is done, as i explained in my letter, that's done by injecting microfine cement grout into clean sand and it essentially turns the sand into stand stone as we all know because we've been in the beach and start digging into the sand, it starts caving in. what the geogrouting procedure allows you're excavating in sandstone ground rock, and we're only going four feet at a time after we've grouted this. the grouting procedure is very well established, very widely used procedure. this isn't a new technology. these aren't new characters involved in the procedure. do you have any questions? >> well the appellant is obviously concerned about the risk of it extending under his structure. can you address that? >> the way that the grout is injected is through a tube that gets advanced about two feet at a time. the grout contractor is actually paid by volume of grout. and that is what they're monitoring the whole time. so with the geotechnical input that larry's provided, that mr. carp's pr

and i did note that the drawings showed the personaliation grouting to be within the property at 2865 vil ahoe and didn't show an encroach onto 2875 vallejo. no work was going on to this permit which was suspended anyway. today, i visited with our dbi engineering plan check folks. david pang happens to be on vacation all week so i spoke with his supervisor, robert chun. and he reviewed the documents before you here tonight. and it was his opinion that the review, having to do with this work, was appropriate. and he didn't see that there were any missteps with the review from the dbi perspective. i also noted that 22 special inspections are relating to this scope of work, which include items relating to the structure as well as the geotechnical aspects of the construction. so we will be doing our dbi inspections, as necessary for the construction, when it is underway. and we will also be requiring those special inspections to be submitted to us with letters of certification, final letters at the end of the work and we will not sign off any approvals for the project until we have approv

especially in the shoring and excavation procedure because even the contractor says that personaliation grouting is not perfect. sometimes they find problems so they have to address the problems during excavation. if the material was further away from the property, that would be less of a concern. i -- good construction, so that was my advice to keith. all right? >> we can take rebuttal from the permit holder. >> i'll try to briefly answer mr. ludky's points. he talks about unnamed geotechnical consultants. if they have, i haven't heard of them. he mentioned no names. this process that we went through is very sophisticated, as a design -- in design. the reviewer was david pang of dbi, who's very, very good engineer, who is a very, very good engineer. the gentleman here keep talking about geogrout. geogrout is a company that looked at the project a year ago, for a different structural engineer, mersa in oakland. they are not involved in the project. we chose -- or the specialty subcontractor chose another contractor with bigger, better equipment, that is less seat of the pants type of work, it's