Looks like it needs the grout lines opened and regrouted.
Those joints look too narrow and may keep failing.
Get some blades and a dustless system.

Sent from my iPhone

> On May 19, 2014, at 10:39 AM, Baird Standish <bairdstandish@gmail.com> wrote:
>
> I think I would use small grout saws and brushes after going over it with a light brush. These jobs aren't easy.
>
>
> ________________________________________
> From the desk of
> Baird Standish
> Managing Partner
> Facility Specialists, LLC
> 15 West Highland Ave. Suite E
> Philadelphia, PA 19118
> Phone: 215-732-7505
> Fax: 215-546-9160
> www.facspecs.com
>
>> On May 19, 2014, at 10:23 AM, Perfect Marble 2 <dayron.padilla13@gmail.com> wrote:
>>
>> Junk and efflorescence place has been worked on for over a yr.
>>
>>
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>> Sent by iPhone
>> Dayron Padilla
>> Perfect Marble
>>
>>
>>> On May 19, 2014, at 10:18 AM, Baird Standish <bairdstandish@gmail.com> wrote:
>>>
>>> Is that grout or just junk that has fallen in between stones that are placed end to end?
>>>
>>>
>>> ________________________________________
>>> From the desk of
>>> Baird Standish
>>> Managing Partner
>>> Facility Specialists, LLC
>>> 15 West Highland Ave. Suite E
>>> Philadelphia, PA 19118
>>> Phone: 215-732-7505
>>> Fax: 215-546-9160
>>> www.facspecs.com
>>>
>>>> On May 19, 2014, at 10:06 AM, Dayron <dayron@perfectmarblefloors.com> wrote:
>>>>
>>>> 5500 sq Ft of this crap knifing it out any suggestions
>>>>
>>>>
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>>>>
>>>> Sent by iPhone
>>>> Dayron Padilla
>>>> Perfect Marble
>>>
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