LINJ Meeting Summary April 1997

Science Center Objects

04/03/97-Meeting Summary

May 2, 1997

Dear liaison committee member,

Enclosed are the liaison committee comments and responses on the FY97 workplan from our April 3 meeting in Edison, NJ. Attendence was good and we want to thank you all for your comments.


Below are the questions and answers recorded for the meeting.

What are the uses of simazine?

Lawn care. In pools it is used as an algacide. Someone wanted to know the trade names for simazine. We have a table that lists them for most commnly detected pesticides.

What is the MCL for MTBE?

Not established yet. Discussions range from 20-200 ug/l. Looking like 70 microgram/L will be the established cleanup criteria for NJ for MTBE. MTBE has been issued a general organic guidence value of 50ug/L in NY for GW.

With all the clammer about Brookhaven Labs, could NAWQA look at radionucliide samples?

In fact, there may be a core taken in a lake near Brookhaven that if someone were interested they could analyze for specific radionucliides, but we won't be doing that.

There is NAWQA interest in coring a lake which has a drainage developed before WWII, a lake developed post WWII, and a lake that is largely undeveloped as a reference for atmospheric inputs. Any information on potential lakes for a NAWQA coring effort would be appreciated. We will route a Callender/VanMetre publication on their coring studies to the committee if and when one is available.

Is anyone looking at Trace Elements in Sediment?

Yes, we did that as our retro effort. Looked at 300 sites available. Two journal articles are available in the April issue of the Water Resources Bulletin of the AWRA and in two factsheets. We also will be collecting 7-10 sites this year for bed sediment and tissues.

Anne asked for input on how to compile non-ag pesticide use?

NJ Bureau of Pesticides Control Programs may have non-ag information. Eric Vowinkel has a PCP data set that may contain Chem Lawn type pesticide use applications. Information is not spatially defined.There is a lakes database in NJDEP for pesticides used in algaecide and macrophyte control. We need to check witht EPA-EMAP for data on DDT.

Larry Rosenman NYS-DEC spoke about his statewide plans to monitor pesticides using NAWQA protocols.

What is being done to insure consistency in collection and database management for ongoing and future sampling efforts of various agencies, for instance, monitoring requirements under the new amendments to the Safe Drinking Water Act?

Communication is the way to make sure there is consistency in each agencies efforts. Given similar data quality goals, there should be similar protocols in field and lab procedures. ITFM (Intergovernmental Task Force on Monitoring) is the latest initiative to try and improve communication and standardization. ITFM will have a new name, will be called National Quality Monitoring Council. Data base issues are a bit tougher but is part of the goal of ITFM to standardize. STORET still is the national data base for water quality data and is being revised/updated.

How were biological impact designations assigned?

Explained how various physical/chemical/biological measures (metrics) of a site are assigned a value and the values are summed. The sum will fall in a certain range of values with a predetermined impact designation.

Can GW be 59% of purveyor supplied water in NE NJ?

No, that is in error. Its more like 19%.

How did we distinguish between new urban that was previously ag and new urban that was previously undeveloped?

We did not initially, but the 2 graphs clearly show a difference in pesticide occurrence based on the previous land use (urban which was previously undeveloped has fewer hits)

What was done to determine if anything is upgradient of well?

Explained that sites were reconned and upgradient land use was important in selection. Since installation, 500m land use buffers have been defined in our GIS using ITU 1986 land use and 1991-2 digital orthophoto quads. This was updated to current conditions with a drive through around each of the shallow wells (only the 30 new urban wells done so far).

Discussed chloroform occurrence.

Eric V. looked at DOC is soils in undeveloped areas, its low (less than 2%). Not sure why chloroform is so common, perhaps an indication of an atmospheric source.

Can you really get at seasonality issues with a 2' screen?

Possibly, but not easily with all the heterogeneity in the system. This is not really our goal to do this, we'll focus more on spatial variability.

Comment that we need to look at metabolites of pesticides and VOCs in the flow path sampling, also the effect of pH.

Metabolites would be our goal.

Some discussion on the role of retention and detention basins, because of their common presence) as a potential source of MTBE and other VOCs.

Suggestion was made to follow up on the past LI work in recharge basins.

Are we sampling for Hg?

No not in the urban component, just in the bed sediment and tissue survey (7-10 sites).