From: Mark Brest van Kempen <firstname.lastname@example.org>
Date: May 11, 2005 11:14:12 AM PDT
To: "Osalbo, Faustino Jun" <email@example.com>, 'Barbara Sutherland '
Cc: "Brooks, Desley" <DBrooks@oaklandnet.com>, "Nadel, Nancy" <NNadel@oaklandnet.com>, "Uzegbu, Marcel" <MUzegbu@oaklandnet.com>, "Estes, Lesley" <firstname.lastname@example.org>, "Schwarz, Alison" <email@example.com>, "'firstname.lastname@example.org'" <email@example.com>, "'firstname.lastname@example.org'" <email@example.com>, "'firstname.lastname@example.org'" <email@example.com>, "Neary, Mike" <firstname.lastname@example.org>, "'Friendsof2Creeks@yahoogroups.com'" <Friendsof2Creeks@yahoogroups.com>, Office of the Mayor <OfficeoftheMayor@oaklandnet.com>, "'email@example.com'" <firstname.lastname@example.org>, "'email@example.com'" <firstname.lastname@example.org>, "Ward, Ron (PWA)" <email@example.com>, "Lau, David W" <firstname.lastname@example.org>, "Sweiss, Fuad" <email@example.com>, "'firstname.lastname@example.org'" <email@example.com>, "'firstname.lastname@example.org'" <email@example.com>, "Madison, William" <firstname.lastname@example.org>
Subject: [Friendsof2Creeks] Re: Chimes Creek turbidity and pumping
I must say that I am very surprised at the lack of understanding that DeSilva has shown about the Creek on which they are working.
Chimes Creek DOES flow through
. It passes under
and daylights again as it flows through Mills. Later Chimes Creek connects with the other tributary of Lion Creek that also flows through Mills.
The pictures that DeSilva staff took of Lion Creek tributary have absolutely no relevance to the community's complaints. The suggestion that we might confuse the Creek running through our back yards with a different Creek that flows half a mile away is extremely absurd and a red herring.
I am also troubled by your implication that my acknowledgment of increased turbidity in Chimes Creek after rain explains my own complaints. As I have stated in several recent complaints to you Chimes Creek now turns completely opaque and quarry colored after rains. This is not the normal increased turbidity previously associated with rain which is grayish and semi opaque. Furthermore you saw this unusual turbidity yourself at my property on Monday and at the time we spoke about how this turbidity was very different from pre-construction turbidity associated with rain.
I ONLY make complaints when there is UNUSUAL turbidity or volume. I have NEVER complained about
increases in turbidity or volume from rain.
In the past all turbidity of this nature that has been explained has been attributed to releases from the Leona Quarry construction site.
DeSilva's suggestion that this increased turbidity is from bank erosion further illustrates a lack of understanding of this watershed. The banks of Chimes Creek below the Quarry are composed of dark colored clay. The opaque turbidity is exactly the same orange color as the soil in the quarry.
If I was incorrect in my calculations about pumping I apologize. The numbers that I used were given to me by City staff. In order to more accurately assess the amount of water pumped into the Creek I request that DeSilva provide records showing 1) Dates of pumping, 2) The amount of time pumping occurred on each day and 3) The volume of pumping on these days. The 40 days of pumping that DeSilva suggests occurred does not correspond with my records nor does it correspond with the records of
Control. And as you know Alameda County Flood Control's data also suggests that large amounts of water were artificially added to Chimes Creek at night after rains. This has still not been explained.
In any case, using DeSilva's numbers for now and imagining pumping for a six hour day would result in 130,870 gallons pumped into Chimes creek. If you put that water in gallon bottles and lined them up it would stretch over 12 miles. In addition 48.6 cfm roughly doubles Chimes Creek's normal flow.
Finally I find it strange that DeSilva keeps stating that they have complied with all water quality standards when they have been fined three times for violating these standards.
I just looked at the Creek (10:15 5/11/05) and it is again opaque and quarry colored, the level is high from pumping and it hasn't rained at all.
Mark Brest van Kempen
3835 Delmont Ave
510 568 6889
on 5/10/05 5:17 PM, Osalbo, Faustino Jun at email@example.com wrote:Mark & Barbara,
Attached is an email response from DeSilva Gates Construction investigating turbid water during the rain.
Please note that when it rains and there is increase flow at Chimes Creek, the flow in Chimes Creek is turbid, as confirmed many times by Mark Brest van Kempen. This has been the case last Wednesday, May 4th when rain fell in the afternoon; Thursday and Friday, May 5th & 6th. Rain continued sporadically Sunday and Monday.
I am confirming what transpired last Friday as reported by DeSilva Gates in the email: NTU reading at the pond was 7 NTU and DeSilva Gates Construction was granted permission to dump the clean water into the City storm system.
I verified the output of the subdrain pipes located at
inlet: the subdrain water was clean. There was negligible water flow at the other three locations where subdrain flows and v-ditches are directly connected into the storm system. I concluded that there is no dirty water leaving the Leona Quarry.
Senior Construction Inspector