The cache is not at the listed coordinates. The coordinates will bring you to one of the newer parks still in development in Newark. Many in the area remember the Curtis Papermill. It was in operation until 1999. At this time, the site was purchased by the city of Newark. It took them years to develop the park that is here today.
Learn about the history of this site using the displays near the parking area. You will be greeted by two columns with Little Joe Curtis. The cache can be located at N 39 41.4AB W 075 44.9CD.
A = "Little Joe Curtis" was created in 195A
B = # of photos of flowers on the "Low Growing Wildflower" sign
C = # that corresponds with having your vehicle serviced on the "Simple Things" sign
D = The Curtis family purchased 21 acres of land for $D,600 in 1848
Check your answers. A+B+C+D should add up to 22