Physical and biological monitoring of estuaries within the Tasman district for Tasman District Council. Sampling sites are located in Ruataniwha, Motupipi, Moutere and Waimea estuaries and Motueka Delta. Sampling frequency = annual (spring or summer). Sampling began in 2002 and is ongoing. Number of sites = 4 total. Extent of site = 1800m2 (60m x 30m). Number of replicates = 10 infaunal cores and 5 replicate sediment samples per site. Measured variables = Infaunal communities (species identified to lowest taxonomic level possible and enumerated). Epifaunal quadrat (0.25m2). Sediment characteristics: basic grain size, ash free dry weight, redox (in field), nitrogen, phosphorus, cadmium, nickel, lead, zinc, chromium and copper (ICPMS). Sediment erosion/deposition (cm/y): depth of sediment layer measured (using 4 concrete plates buried at most sites). Sampling protocol & QA = Benthic and sediment sampling use similar methods to those outlined by Robertson et al. (2002). Internal QA procedures. Larger fauna are indentified internally with small and cryptic animals sent to external taxonomic experts. Basic sediment grain size = 2mm & 63µm sieves, gravimetric (% gravel, sand, and silt)