Appendix A: CSLAP 2009 Lake Water Quality Summary: DeRuyter Reservoir

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1 Appendix A: CSLAP 2009 Lake Water Quality Summary: DeRuyter Reservoir General Lake Information Location County Basin Size Lake Origins Watershed Area Retention Time Mean Depth Sounding Depth Public Access? Major Tributaries Lake Tributary To town of DeRuyter Madison Seneca/Oneida/Oswego Rivers hectares (556.5 acres) Augmented by Dam 1011 hectares (2497 acres) 3.3 years 7.2 meters 16 meters private no named tribs Limestone Creek to Chittenango Creek to Oneida Lake to Oneida River to Lake Ontario WQ Classification B (contact recreation = swimming) Lake Outlet Latitude Lake Outlet Longitude Sampling Years Samplers Jim Adsitt and Linda Lanty Main Contact Jim Adsitt Lake Map (sampling location marked with a circle)

2 Background DeRuyter Reservoir is a 557 acre, class B lake found in the Town of DeRuyter in Madison County, in central New York State. The lake was first sampled as part of CSLAP in It is one of 12 CSLAP lakes among the >18 lakes found in Madison County, and one of 24 CSLAP lakes among the >120 lakes and ponds in the Susquehanna River drainage basin. Lake Uses DeRuyter Reservoir is a Class B lake; this means that the best intended use for the lake is for contact recreation swimming and bathing, non-contact recreation boating and fishing; aesthetics and aquatic life. The lake is used by lake residents and invited guests for power boating and swimming, through residential shoreline access to the lake and a private launch. There is no public access to the lake. DeRuyter Reservoir has been stocked by the NYSDEC- in recent years, 2.88 million inch walleye have been stocked on a mostly annual basis. The DEC Bureau of Fisheries reports that the lake maintains a population of largemouth bass, walleye, black crappie, smallmouth bass, yellow perch, white sucker, chain pickerel, rock bass, and sunfish. General statewide fishing regulations are applicable in DeRuyter Reservoir. However, trout fishing season is April 1 st to October 15 th ; while there are no (minimum) size limits, daily takes are limited to 5, with no more than 2 greater than 18, and no more than 5 brook trout < 8 in size. There are no lake-specific fish consumption advisories on DeRuyter Reservoir. Historical Water Quality Data CSLAP sampling was conducted on DeRuyter Reservoir from The CSLAP reports for DeRuyter Reservoir for several years are posted on the NYSFOLA website at under NYS Lake Association Lake List. DeRuyter Reservoir was sampled by the Conservation Department (the predecessor to the NYSDEC) as part of the Biological Survey of the Susquehanna River basin in This program was intended to evaluate water quality conditions as a biological inventory and as these conditions relate to fisheries management, so much of the information collected cannot be easily compared to the CSLAP dataset. The overall summary for DeRuyter Lake was as follows: DeRuyter Reservoir is maintained as a Barge Canal feeder. Most of its water comes from the upper part of the Tioughnioga Creek. A large part of the lake is less than 30 feet deep, a very small area having a maximum depth of 48 feet. There is a good supply of oxygen at all depths. Vegetation is scant. The reservoir has an average draw of 6 to 7 feet and can be drawn down 18 1/2 feet. It is reported that good fishing may be had here for small-mouthed bass, pike-perch, pickerel, bullheads and sunfish. There is fair fishing for yellow perch. Many fishermen visit the lake at all seasons. Forage fish and crayfish are plentiful. Many young small-

3 mouthed bass were taken. Pike-perch and small-mouthed bass are recommended for stocking. More intensive fishing for sunfish would benefit the other species, especially the yellow perch. Dense weed beds form a conspicuous marginal zone around this small, relatively shallow lake with a muddy bottom. The predominant species include the pondweeds (Potamogeton amplifolius and P.natans) in great abundance, blunt-leafed pondweed, waterweed, large duckweed, mud plantain and waterlilies" The limited monitoring did show that ph readings (= 8.1) were mostly comparable to those measured in contemporary monitoring programs, and that the lake was both thermally stratified and fully oxygenated in the bottom waters, but samples were only collected to a depth of about 22 feet. Oxygen deficits have been more common in recent years, when temperature and oxygen profiles have been established to a depth of greater than 50 feet. Data from the DEC fisheries surveys in 1995 are mostly comparable to the data measured through CSLAP. The thermocline was found at a depth of 9 meters; hypoxic conditions (D.O. below 4 ppm, corresponding to the state water quality standards) occurred at that depth, and anoxia (zero oxygen) conditions were found below a depth of 13 meters). DeRuyter Reservoir was sampled as part of the DEC biomonitoring study in These data showed conditions comparable to those measured through CSLAP. The lake was thermally stratified below a depth of about 8 meters, with decreasing dissolved oxygen levels below that depth. Hypoxia was measured below a depth of 12 meters, but anoxia did not occur. It is not known if the conditions measured in 1995 (in mid-august) or those from mid-july in 2008 were more representative of normal conditions in the lake. Chloride levels are typical of lakes with only minimal impacts from road salting operations. Neither Limestone Creek nor the outlet of DeRuyter Reservoir has been monitored through the NYSDEC Rotating Intensive Basins (RIBS) program or the state stream macroinvertebrate monitoring program.. Lake Association and Management History DeRuyter Reservoir is served by the Tioughnioga Lake Association. The lake association was formed in 1939 and is involved in a number of lake improvement and social activities, including: newsletter and web site education for goose control, dam repair and regulations, and water quality conditions in the lake dye testing The lake association maintains a web site at

4 Summary of 2009 CSLAP Sampling Results Evaluation of Eutrophication Indicators Secchi disk transparency readings were higher than normal in 2009, in response to chlorophyll a readings that were lower than normal in It is not known if this is due to greater predation by zebra mussels or other factors. None of these indicators has exhibited any clear long-term trends. The lake can be characterized as mesotrophic, or moderately productive, based on water clarity, total phosphorus and chlorophyll a readings (all typical of mesotrophic lakes). The TSI evaluation suggests that each of these trophic indicators is internally consistent each of these indicators is in the expected range given the readings of the other indicators. Overall trophic conditions are summarized on the Lake Scorecard. Evaluation of Potable Water Indicators Algae levels are at times high enough to render the lake susceptible to taste and odor compounds or elevated DBP (disinfection by product) compounds that could affect the potability of the water, but the lake is not classified for use for drinking water. Deepwater phosphorus and ammonia readings are similar to those measured at the lake surface, so deepwater intakes may support unofficial potable water use. Evaluation of Limnological Indicators Some of the limnological indicators measured in CSLAP in 2009 deviated from normal. Ammonia, true color and calcium readings were higher than normal in 2009, and ph readings were lower than normal. The rise in true color readings in 2009 was also seen in many other CSLAP lakes, most likely in response to wetter weather. However, none of the other limnological indicators has exhibited any clear long-term trends, and it is likely that the small changes in each of these indicators have been within the normal range of variability in the lake. Overall limnological conditions are summarized in the Lake Scorecard. Evaluation of Biological Condition The 1992 phytoplankton survey indicated intermediate algae levels dominated by dinoflagellates. It is not known if this is representative of the algal community structure in the lake, particularly since the lake has been invaded by zebra mussels since Macrophyte surveys have been conducted through CSLAP and the 2008 biomonitoring survey of DeRuyter Reservoir. At least 11 aquatic plant species have been found, including at least one exotic plant species (Myriophyllum spicatum, Eurasian watermilfoil). The modified FQI for the lake indicates that the quality of the aquatic plant community is fair. The results from the macroinvertebrate survey conducted in 2008 have not yet been fully analyzed. The preliminary results indicate a small number of macroinvertebrate taxa and a low percentage of any single taxa (indicating high macroinvertebrate diversity), a low percentage of organisms associated with good water quality, but a lower tolerance for pollution than other surveyed lakes. These somewhat contradictory results indicate that a more detailed analysis of these results will be required before the benthic communities in the lake can be characterized.

5 The composition of the fish community is comprised of at least six warmwater fish species, and at least four coolwater fish species. This suggests that the lake can most likely be characterized as a coolwater fishery. Zooplankton have not been evaluated through CSLAP in DeRuyter Reservoir. Evaluation of Lake Perception Water quality, aquatic plant and recreational assessments were close to normal in 2009, and none of these measures of lake perception has exhibited any clear long-term trends. Overall lake perception is summarized on the Lake Scorecard. Evaluation of Local Climate Change Air and water temperature readings in the summer index period were lower to normal in 2009, but both air and water temperature readings have increased over the last twenty years. It is not known if this is an indication of local climate change or if this represents normal variability. Lake Scorecard Category Indicator Classification 2009 Change? Long Term Change? Eutrophication Indicators Water Clarity Mesotrophic Higher than normal No Chlorophyll a Mesotrophic Lower than normal No Total Phosphorus Mesotrophic No No Potable Water Indicators Hypolimnetic Ammonia Similar to Surface NH4 Hypolimnetic Arsenic Hypolimnetic Iron Hypolimnetic Manganese Limnological Indicators Hypolimnetic Phosphorus Similar to Surface TP Nitrate + Nitrite Low NOx No No Ammonia Low Ammonia Higher than normal No Total Nitrogen Low Total Nitrogen No No ph Alkaline Lower than normal No Specific Conductance Intermediate No No True Color Uncolored Higher than normal No Calcium Highly Susceptible to Zebra Mussels Higher than normal No Lake Perception WQ Assessment Not Quite Crystal Clear No No Biological Condition Aquatic Plant Coverage Subsurface Plant Growth No No Recreational Assessment Excellent No No Phytoplankton Intermediate biomass dominated by dinoflagellates Not known Not known Macrophytes Fair quality of the aquatic plant community Not known Not known Zooplankton Not measured through CSLAP Not known Not known Small number of taxa, few taxa Macroinvertebrates associated with good water quality, Not known Not known relatively high diversity among taxa Fish Coolwater fishery Not known Not known Invasive Species Eurasian watermilfoil Not known Not known Local Climate Change Air Temperature No Increasing Water Temperature No Increasing

6 Evaluation of Lake Condition Impacts to Lake Uses DeRuyter Reservoir is presently among the lakes listed on the 1999 Susquehanna River Basin PWL, with public bathing and recreation listed as threatened due to excessive weed growth. The PWL listing for DeRuyter Reservoir is listed in Appendix C. Potable Water (Drinking Water) The CSLAP dataset at DeRuyter Reservoir, including water chemistry data, physical measurements, and volunteer samplers perception data, is inadequate to evaluate the use of the lake for potable water, and the lake is not used for this purpose. The moderate algae levels may at times threaten any unofficial potable water use from the surface waters of the lake. Contact Recreation (Swimming) The CSLAP dataset at DeRuyter Reservoir, including water chemistry data, physical measurements, and volunteer samplers perception data, suggests that swimming and contact recreation should be fully supported, although additional information about bacterial levels is needed to evaluate the safety of the water for swimming. Non Contact Recreation (Boating and Fishing) The CSLAP dataset on DeRuyter Reservoir, including water chemistry data, physical measurements, and volunteer samplers perception data, suggest that non-contact recreation may be threatened by Eurasian watermilfoil. Aquatic Life The CSLAP dataset on DeRuyter Reservoir, including water chemistry data, physical measurements, and volunteer samplers perception data, suggest that aquatic life may be threatened by the presence of zebra mussels, although additional data are needed to evaluate the food and habitat conditions for aquatic organisms in the lake. Aesthetics The CSLAP dataset on DeRuyter Reservoir, including water chemistry data, physical measurements, and volunteer samplers perception data, suggest that aesthetics should be fully supported. Fish Consumption There are no fish consumption advisories posted for DeRuyter Reservoir. Additional Comments and Recommendations Additional aquatic plant survey data may help to determine if the aquatic plant community is dominated by exotic plants, or if the occasional management of the nuisance weed problems in the lake has resulted in a shift to dominance by native plant species. Aquatic Plant IDs 2009 None submitted in 2009.

7 Time Series: Trophic Indicators, 2009 TP and Chl.a, µg/l /27/ /06/ /15/ /24/ /03/2009 Zsd, m TotalP Chl.a Zsd Time Series: Trophic Indicators, Typical Year ( ) TP and Chl.a (µg/l) Zsd (m) TP Chl.a Zsd June July Aug Sept Oct 4

8 Time Series: Lake Perception Indicators, /27/ /06/ /15/ /24/ /03/ Most Favorable 2 Perception 3 4 Clarity Weeds Recreation 5 Least Favorable Time Series: Lake Perception Indicators, Typical Year ( ) 1 June July Aug Sept Oct Most Favorable 2 Perception 3 Clarity Weeds Recreation 4 5 Least Favorable

9 Appendix B CSLAP Water Quality Sampling Results for DeRuyter Reservoir LNum PName Date Zbot Zsd Zsamp Tot.P NO3 NH4 TDN TN/TP TColor ph Cond25 Ca Chl.a 40 DeRuyter R 6/18/ DeRuyter R 6/25/ DeRuyter R 7/2/ DeRuyter R 7/9/ DeRuyter R 7/17/ DeRuyter R 7/24/ DeRuyter R 7/30/ DeRuyter R 8/7/ DeRuyter R 8/13/ DeRuyter R 8/21/ DeRuyter R 8/28/ DeRuyter R 9/5/ DeRuyter R 9/10/ DeRuyter R 9/18/ DeRuyter R 9/25/ DeRuyter R 6/25/ DeRuyter R 7/1/ DeRuyter R 7/8/ DeRuyter R 7/15/ DeRuyter R 7/23/ DeRuyter R 7/30/ DeRuyter R 8/7/ DeRuyter R 8/13/ DeRuyter R 8/19/ DeRuyter R 8/27/ DeRuyter R 9/2/ DeRuyter R 9/12/ DeRuyter R 9/17/ DeRuyter R 9/24/ DeRuyter R 10/9/ DeRuyter R 6/24/ DeRuyter R 7/8/ DeRuyter R 7/22/ DeRuyter R 8/2/ DeRuyter R 8/20/ DeRuyter R 9/3/ DeRuyter R 9/16/ DeRuyter R 9/30/ DeRuyter R 6/23/ DeRuyter R 6/30/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/11/ DeRuyter R 8/25/ DeRuyter R 9/22/ DeRuyter R 10/13/ DeRuyter R 6/6/ DeRuyter R 6/21/ DeRuyter R 6/21/ DeRuyter R 7/4/ DeRuyter R 7/19/ DeRuyter R 8/2/ DeRuyter R 8/16/ DeRuyter R 8/30/ DeRuyter R 9/13/ DeRuyter R 6/19/ DeRuyter R 7/5/ DeRuyter R 7/18/ DeRuyter R 7/31/ DeRuyter R 8/15/ DeRuyter R 8/29/ DeRuyter R 9/12/ DeRuyter R 9/26/ DeRuyter R 6/5/

10 LNum PName Date Zbot Zsd Zsamp Tot.P NO3 NH4 TDN TN/TP TColor ph Cond25 Ca Chl.a 40 DeRuyter R 6/19/ DeRuyter R 7/3/ DeRuyter R 7/17/ DeRuyter R 7/31/ DeRuyter R 8/14/ DeRuyter R 8/28/ DeRuyter R 9/11/ DeRuyter R 6/18/ DeRuyter R 7/3/ DeRuyter R 7/16/ DeRuyter R 7/30/ DeRuyter R 8/13/ DeRuyter R 8/27/ DeRuyter R 9/10/ DeRuyter R 9/24/ DeRuyter R 6/16/ DeRuyter R 6/30/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/11/ DeRuyter R 8/25/ DeRuyter R 9/8/ DeRuyter R 9/22/ DeRuyter R 6/22/ DeRuyter R 7/6/ DeRuyter R 7/20/ DeRuyter R 8/2/ DeRuyter R 8/17/ DeRuyter R 9/2/ DeRuyter R 9/14/ DeRuyter R 9/27/ DeRuyter R 6/3/ DeRuyter R 6/14/ DeRuyter R 6/28/ DeRuyter R 7/12/ DeRuyter R 7/26/ DeRuyter R 8/9/ DeRuyter R 8/23/ DeRuyter R 9/13/ DeRuyter R 6/13/ DeRuyter R 6/27/ DeRuyter R 7/11/ DeRuyter R 7/25/ DeRuyter R 8/8/ DeRuyter R 8/24/ DeRuyter R 9/5/ DeRuyter R 9/19/ DeRuyter R 6/3/ DeRuyter R 6/19/ DeRuyter R 7/2/ DeRuyter R 7/16/ DeRuyter R 7/30/ DeRuyter R 8/13/ DeRuyter R 8/28/ DeRuyter R 9/10/ DeRuyter R 6/17/ DeRuyter R 7/2/ DeRuyter R 7/15/ DeRuyter R 7/29/ DeRuyter R 8/12/ DeRuyter R 8/26/ DeRuyter R 9/9/ DeRuyter R 9/23/ DeRuyter R 06/02/ DeRuyter R 06/16/ DeRuyter R 06/30/ DeRuyter R 07/14/

11 LNum PName Date Zbot Zsd Zsamp Tot.P NO3 NH4 TDN TN/TP TColor ph Cond25 Ca Chl.a 40 DeRuyter R 07/29/ DeRuyter R 08/11/ DeRuyter R 08/25/ DeRuyter R 09/13/ DeRuyter R 6/2/ DeRuyter R 6/15/ DeRuyter R 6/29/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/10/ DeRuyter R 8/25/ DeRuyter R 9/7/ DeRuyter R 6/13/ DeRuyter R 6/27/ DeRuyter R 7/11/ DeRuyter R 7/25/ DeRuyter R 8/9/ DeRuyter R 8/22/ DeRuyter R 9/6/ DeRuyter R 9/26/ DeRuyter R 6/12/ DeRuyter R 6/26/ DeRuyter R 7/10/ DeRuyter R 7/24/ DeRuyter R 8/7/ DeRuyter R 8/21/ DeRuyter R 9/5/ DeRuyter R 9/18/ DeRuyter R 6/11/ DeRuyter R 6/27/ DeRuyter R 7/9/ DeRuyter R 7/23/ DeRuyter R 8/6/ DeRuyter R 8/20/ DeRuyter R 9/4/ DeRuyter R 9/18/ DeRuyter R 7/8/ DeRuyter R 7/22/ DeRuyter R 8/5/ DeRuyter R 8/12/ DeRuyter R 8/26/ DeRuyter R 9/10/ DeRuyter R 10/7/ DeRuyter R 10/21/ DeRuyter R 6/9/ DeRuyter R 6/29/ DeRuyter R 7/13/ DeRuyter R 7/27/ DeRuyter R 8/9/ DeRuyter R 8/24/ DeRuyter R 9/8/ DeRuyter R 9/20/ DeRuyter R 06/10/ DeRuyter R 06/28/ DeRuyter R 07/12/ DeRuyter R 08/03/ DeRuyter R 08/17/ * DeRuyter R 08/30/ DeRuyter R 09/20/ DeRuyter R 7/18/ DeRuyter R 7/31/ DeRuyter R 8/29/ DeRuyter R 9/26/ DeRuyter R 6/19/ DeRuyter R 7/17/ DeRuyter R 9/11/ DeRuyter R 6/18/

12 LNum PName Date Zbot Zsd Zsamp Tot.P NO3 NH4 TDN TN/TP TColor ph Cond25 Ca Chl.a 40 DeRuyter R 7/16/ DeRuyter R 8/13/ DeRuyter R 8/27/ DeRuyter R 9/24/ DeRuyter R 6/16/ DeRuyter R 7/28/ DeRuyter R 8/25/ DeRuyter R 9/22/ DeRuyter R 6/22/ DeRuyter R 7/20/ DeRuyter R 9/2/ DeRuyter R 9/27/ DeRuyter R 6/3/ DeRuyter R 7/12/ DeRuyter R 8/9/ DeRuyter R 9/13/ DeRuyter R 06/02/ DeRuyter R 06/16/ DeRuyter R 06/30/ DeRuyter R 07/14/ DeRuyter R 07/29/ DeRuyter R 08/11/ DeRuyter R 08/25/ DeRuyter R 09/13/ DeRuyter R 6/2/ DeRuyter R 6/15/ DeRuyter R 6/29/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/10/ DeRuyter R 8/25/ DeRuyter R 9/7/ DeRuyter R 6/13/ DeRuyter R 6/27/ DeRuyter R 7/11/ DeRuyter R 7/25/ DeRuyter R 8/9/ DeRuyter R 8/22/ DeRuyter R 9/6/ DeRuyter R 9/26/ DeRuyter R 6/12/ DeRuyter R 6/26/ DeRuyter R 7/10/ DeRuyter R 7/24/ DeRuyter R 8/7/ DeRuyter R 8/21/ DeRuyter R 9/5/ DeRuyter R 9/18/ DeRuyter R 6/11/ DeRuyter R 6/27/ DeRuyter R 7/9/ DeRuyter R 7/23/ DeRuyter R 8/6/ DeRuyter R 8/20/ DeRuyter R 9/4/ DeRuyter R 9/18/ DeRuyter R 7/8/ DeRuyter R 7/22/ DeRuyter R 8/5/ DeRuyter R 8/12/ DeRuyter R 8/26/ DeRuyter R 9/10/ DeRuyter R 10/7/ DeRuyter R 10/21/ DeRuyter R 6/9/ DeRuyter R 6/29/ DeRuyter R 7/13/

13 LNum PName Date Zbot Zsd Zsamp Tot.P NO3 NH4 TDN TN/TP TColor ph Cond25 Ca Chl.a 40 DeRuyter R 7/27/ DeRuyter R 8/9/ DeRuyter R 8/24/ DeRuyter R 9/8/ DeRuyter R 9/20/ DeRuyter R 06/10/ DeRuyter R 06/28/ DeRuyter R 07/12/ DeRuyter R 08/03/ DeRuyter R 08/17/ DeRuyter R 08/30/ DeRuyter R 09/20/ LNum PName Date Zbot QaQc TAir TH20 QA QB QC QD 40 DeRuyter R 6/18/ DeRuyter R 6/25/ DeRuyter R 7/2/ DeRuyter R 7/9/ DeRuyter R 7/17/ DeRuyter R 7/24/ DeRuyter R 7/30/ DeRuyter R 8/7/ DeRuyter R 8/13/ DeRuyter R 8/21/ DeRuyter R 8/28/ DeRuyter R 9/5/ DeRuyter R 9/10/ DeRuyter R 9/18/ DeRuyter R 9/25/ DeRuyter R 6/25/ DeRuyter R 7/1/ DeRuyter R 7/8/ DeRuyter R 7/15/ DeRuyter R 7/23/ DeRuyter R 7/30/ DeRuyter R 8/7/ DeRuyter R 8/13/ DeRuyter R 8/19/ DeRuyter R 8/27/ DeRuyter R 9/2/ DeRuyter R 9/12/ DeRuyter R 9/17/ DeRuyter R 9/24/ DeRuyter R 10/9/ DeRuyter R 6/24/ DeRuyter R 7/8/ DeRuyter R 7/22/ DeRuyter R 8/2/ DeRuyter R 8/20/ DeRuyter R 9/3/ DeRuyter R 9/16/ DeRuyter R 9/30/ DeRuyter R 6/23/ DeRuyter R 6/30/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/11/ DeRuyter R 8/25/ DeRuyter R 9/22/ DeRuyter R 10/13/ DeRuyter R 6/6/ DeRuyter R 6/21/ DeRuyter R 6/21/

14 LNum PName Date Zbot QaQc TAir TH20 QA QB QC QD 40 DeRuyter R 7/4/ DeRuyter R 7/19/ DeRuyter R 8/2/ DeRuyter R 8/16/ DeRuyter R 8/30/ DeRuyter R 9/13/ DeRuyter R 6/19/ DeRuyter R 7/5/ DeRuyter R 7/18/ DeRuyter R 7/31/ DeRuyter R 8/15/ DeRuyter R 8/29/ DeRuyter R 9/12/ DeRuyter R 9/26/ DeRuyter R 6/5/ DeRuyter R 6/19/ DeRuyter R 7/3/ DeRuyter R 7/17/ DeRuyter R 7/31/ DeRuyter R 8/14/ DeRuyter R 8/28/ DeRuyter R 9/11/ DeRuyter R 6/18/ DeRuyter R 7/3/ DeRuyter R 7/16/ DeRuyter R 7/30/ DeRuyter R 8/13/ DeRuyter R 8/27/ DeRuyter R 9/10/ DeRuyter R 9/24/ DeRuyter R 6/16/ DeRuyter R 6/30/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/11/ DeRuyter R 8/25/ DeRuyter R 9/8/ DeRuyter R 9/22/ DeRuyter R 6/22/ DeRuyter R 7/6/ DeRuyter R 7/20/ DeRuyter R 8/2/ DeRuyter R 8/17/ DeRuyter R 9/2/ DeRuyter R 9/14/ DeRuyter R 9/27/ DeRuyter R 6/3/ DeRuyter R 6/14/ DeRuyter R 6/28/ DeRuyter R 7/12/ DeRuyter R 7/26/ DeRuyter R 8/9/ DeRuyter R 8/23/ DeRuyter R 9/13/ DeRuyter R 6/13/ DeRuyter R 6/27/ DeRuyter R 7/11/ DeRuyter R 7/25/ DeRuyter R 8/8/ DeRuyter R 8/24/ DeRuyter R 9/5/ DeRuyter R 9/19/ DeRuyter R 6/3/

15 LNum PName Date Zbot QaQc TAir TH20 QA QB QC QD 40 DeRuyter R 6/19/ DeRuyter R 7/2/ DeRuyter R 7/16/ DeRuyter R 7/30/ DeRuyter R 8/13/ DeRuyter R 8/28/ DeRuyter R 9/10/ DeRuyter R 6/17/ DeRuyter R 7/2/ DeRuyter R 7/15/ DeRuyter R 7/29/ DeRuyter R 8/12/ DeRuyter R 8/26/ DeRuyter R 9/9/ DeRuyter R 9/23/ DeRuyter R 06/02/ DeRuyter R 06/16/ DeRuyter R 06/30/ DeRuyter R 07/14/ DeRuyter R 07/29/ DeRuyter R 08/11/ DeRuyter R 08/25/ DeRuyter R 09/13/ DeRuyter R 6/2/ DeRuyter R 6/15/ DeRuyter R 6/29/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/10/ DeRuyter R 8/25/ DeRuyter R 9/7/ DeRuyter R 6/13/ DeRuyter R 6/27/ DeRuyter R 7/11/ DeRuyter R 7/25/ DeRuyter R 8/9/ DeRuyter R 8/22/ DeRuyter R 9/6/ DeRuyter R 9/26/ DeRuyter R 6/12/ DeRuyter R 6/26/ DeRuyter R 7/10/ DeRuyter R 7/24/ DeRuyter R 8/7/ DeRuyter R 8/21/ DeRuyter R 9/5/ DeRuyter R 9/18/ DeRuyter R 6/11/ DeRuyter R 6/27/ DeRuyter R 7/9/ DeRuyter R 7/23/ DeRuyter R 8/6/ DeRuyter R 8/20/ DeRuyter R 9/4/ DeRuyter R 9/18/ DeRuyter R 7/8/ DeRuyter R 7/22/ DeRuyter R 8/5/ DeRuyter R 8/12/ DeRuyter R 8/26/ DeRuyter R 9/10/ DeRuyter R 10/7/ DeRuyter R 10/21/

16 LNum PName Date Zbot QaQc TAir TH20 QA QB QC QD 40 DeRuyter R 6/9/ DeRuyter R 6/29/ DeRuyter R 7/13/ DeRuyter R 7/27/ DeRuyter R 8/9/ DeRuyter R 9/8/ DeRuyter R 9/20/ DeRuyter R 06/10/ DeRuyter R 06/28/ DeRuyter R 07/12/ DeRuyter R 08/03/ DeRuyter R 08/17/ * DeRuyter R 08/30/ DeRuyter R 09/20/ DeRuyter R 7/18/ DeRuyter R 7/31/ DeRuyter R 9/26/ DeRuyter R 6/19/ DeRuyter R 7/17/ DeRuyter R 9/11/ DeRuyter R 6/18/ DeRuyter R 7/16/ DeRuyter R 8/27/ DeRuyter R 9/24/ DeRuyter R 7/28/ DeRuyter R 8/25/ DeRuyter R 6/22/ DeRuyter R 7/20/ DeRuyter R 6/3/ DeRuyter R 9/13/ DeRuyter R 06/02/ DeRuyter R 06/16/ DeRuyter R 06/30/ DeRuyter R 07/14/ DeRuyter R 07/29/ DeRuyter R 08/11/ DeRuyter R 08/25/ DeRuyter R 09/13/ DeRuyter R 6/2/ DeRuyter R 6/15/ DeRuyter R 6/29/ DeRuyter R 7/14/ DeRuyter R 7/28/ DeRuyter R 8/10/ DeRuyter R 8/25/ DeRuyter R 9/7/ DeRuyter R 6/13/ DeRuyter R 6/27/ DeRuyter R 7/11/ DeRuyter R 7/25/ DeRuyter R 8/9/ DeRuyter R 8/22/ DeRuyter R 9/6/ DeRuyter R 9/26/ DeRuyter R 6/12/ DeRuyter R 6/26/ DeRuyter R 7/10/ DeRuyter R 7/24/ DeRuyter R 8/7/ DeRuyter R 8/21/ DeRuyter R 9/5/ DeRuyter R 9/18/ DeRuyter R 6/11/

17 LNum PName Date Zbot QaQc TAir TH20 QA QB QC QD 40 DeRuyter R 6/27/ DeRuyter R 7/9/ DeRuyter R 7/23/ DeRuyter R 8/6/ DeRuyter R 8/20/ DeRuyter R 9/4/ DeRuyter R 9/18/ DeRuyter R 7/8/ DeRuyter R 7/22/ DeRuyter R 8/5/ DeRuyter R 8/12/ DeRuyter R 8/26/ DeRuyter R 9/10/ DeRuyter R 10/7/ DeRuyter R 10/21/ DeRuyter R 6/9/ DeRuyter R 6/29/ DeRuyter R 7/13/ DeRuyter R 7/27/ DeRuyter R 8/9/ DeRuyter R 9/8/ DeRuyter R 9/20/ DeRuyter R 06/10/ DeRuyter R 06/28/ DeRuyter R 07/12/ DeRuyter R 08/03/ DeRuyter R 08/17/ DeRuyter R 08/30/ DeRuyter R 09/20/

18 Legend Information Indicator Description Detection Limit General Information Lnum lake number (unique to CSLAP) Lname name of lake (as it appears in the Gazetteer of NYS Lakes) Date sampling date Standard (S) / Criteria (C) Field Parameters Zbot lake depth at sampling point, meters (m) Zsd Secchi disk transparency or clarity 0.1m 1.2m ( C) Zsamp water sample depth (m) 0.1m none Tair air temperature ( C) 10C none TH20 water temperature ( C) 10C none Laboratory Parameters Tot.P total phosphorus (mg/l) mg/l mg/l ( C) NOx nitrate + nitrite (mg/l) 0.01 mg/l 10 mg/l NO3 (S), 2 mg/l NO2 (S) NH4 total ammonia (mg/l) 0.01 mg/l 2 mg/l NH4 (S) TN total nitrogen (mg/l) 0.01 mg/l none TN/TP nitrogen to phosphorus (molar) ratio, = (TKN + NOx)*2.2/TP none TCOLOR true (filtered) color (ptu, platinum color units) 1 ptu none ph powers of hydrogen (S.U., standard ph units) 0.1 S.U. 6.5, 8.5 S.U. (S) Cond25 specific conductance, corrected to 25C (umho/cm) 1 umho/cm none Ca calcium (mg/l) 1 mg/l none Chl.a chlorophyll a (ug/l) 0.01 ug/l none Fe iron (mg/l) 0.1 mg/1 0.3 mg/l (S) Mn manganese (mg/l) 0.01 mg/l 0.3 mg/l (S) As arsenic (mg/l) 1 ug/l 10 ug/l (S) Lake Assessment QA water quality assessment, 5 point scale; 1 = crystal clear, 2 = not quite crystal clear, 3 = definite algae greenness, 4 = high algae levels, 5 = severely high algae levels QB aquatic plant assessment, 5 point scale; 1 = no plants visible, 2 = plants below surface, 3 = plants at surface, 4 = plants dense at surface, 5 = surface plant coverage QC recreational assessment, 5 point scale; 1 = could not be nicer, 2 = excellent, 3 = slightly impaired, 4 = substantially impaired, 5 = lake not usable QD reasons for recreational assessment, 8 choices; 1 = poor water clarity, 2 = excessive weeds, 3 = too much algae, 4 = lake looks bad, 5 = poor weather, 6 = litter/surface debris, 7 = too many lake users, 8 = other

19 Appendix C PWL Listing for DeRuyter Reservoir

20