Best Long Island Groundwater Sampling. Call PG Environmental Services, Inc. At (631) 901-1888. With all methodologies, there is various equipment that can be used to achieve the desired result. Give us a call today for all your groundwater sampling needs. PG Environmental Services, Inc 175 Commerce Drive Suite N Hauppauge, NY 11788, United States (631) 901-1888 https://mgyb.co/s/7DBiV